Entries |
Document | Title | Date |
20080231108 | Method of Determining an Initial Pressure in a Motor Vehicle Brake System - A method of determining an initial pressure which prevails between a master brake cylinder and an inlet valve of a wheel brake cylinder of a motor vehicle brake system. It determines the initial pressure taking into consideration the variation of a follow-up voltage of a clock-operated motor of a pump, which is used for the return delivery of brake fluid from a low-pressure accumulator into the master brake cylinder. Several characteristic quantities of the voltage variation are measured and in each case taken into account to determine an initial pressure value, and the quality and/or reliability of the measured characteristic quantities is evaluated. The characteristic quantities and/or the initial pressure values determined therefrom are filtered and/or conditioned in the event of lack in quality and/or reliability of the measured characteristic quanitites. The initial pressure values determined from the various characteristic quantities are averaged, with only pressure values of similar size being taken into consideration and the initial pressure values are temporally averaged in order to dampen fluctuations. | 09-25-2008 |
20080238185 | Braking System - Disclosed is a redundant braking system for a vehicle. A controller may monitor a status of a hydraulic braking system, and during vehicle travel, automatically switch to a modulated electric braking system which is separate from the hydraulic braking system when the hydraulic braking system fails. The modulated electric braking system may utilize a brake acting on a drive shaft of the vehicle, and an operator-actuated switch may set a mode of the modulated electric braking system to a non-modulated parking brake mode. | 10-02-2008 |
20080265662 | Brake System Fault Pedal Gain Change Method and System - A brake system fault pedal gain change method and system for brake pedal simulator equipped vehicles such as hybrid electric vehicles is provided. In the event of a brake system booster fault, the method alerts the driver by way of tactile feedback. Additionally, the disclosed method provides a controlled means to gradually increase required brake pedal force during a brake system fault to avoid an abrupt change in brake pedal force when the brake system boost is depleted. | 10-30-2008 |
20080290725 | Hydraulic Braking System For A Land Craft - A hydraulic brake system for a land vehicle, having a master cylinder, which is actuable by the driver by means of a pedal directly or via a brake booster disposed downstream of the pedal, for generating brake pressure in two brake circuits, each of which comprises two wheel brakes, wherein a hydraulic connection between the master cylinder and the wheel brakes is to be established or blocked by valve arrangements in dependence upon trigger signals from an electronic control unit in order to implement normal braking operations brought about directly by the driver or braking operations influenced by the electronic control unit in dependence upon measured variables, which are supplied to the electronic control unit and reflect the vehicle behaviour and/or the driver request, in that the brake pressure characteristic in the wheel brakes is varied by activating the valve arrangements associated therewith, wherein the electronic control unit is devised and programmed in such a way that, in order to set a brake pressure characteristic required for a specific vehicle behaviour, it supplies trigger signals, by means of which the setting of a respective brake pressure characteristic in the two brake circuits in predefined pressure stages (delta-p) is staggered in terms of time by a substantially predefined time stage (delta-t). | 11-27-2008 |
20090001804 | Control and/or Regulation Device for an Elevating Platform of a Continuous Casting Machine - A controlling and/or regulating device for a lifting table ( | 01-01-2009 |
20090045671 | VALVE WITH INTEGRATED QUICK RELEASE - A service brake/traction control valve includes a service brake control port, a traction control port, an exhaust port, and a control chamber. The control chamber fluidly communicates with the service brake control port and the traction control port as a function of a service brake event and as a function of a traction control event. The control chamber fluidly communicates with the exhaust port when the service brake event is released. The control chamber fluidly also communicates with the exhaust port when the traction control event is released. | 02-19-2009 |
20090115242 | Electrically Actuated Booster - An electrically actuated booster capable of obtaining various desired brake characteristics and improving brake feeling performs displacement control such that the relative displacement relationship between an input member and an assist member is variable according to the absolute displacement of the input member. | 05-07-2009 |
20090121539 | BRAKE PIPE VENT VALVE FOR LOCOMOTIVE BRAKE SYSTEM - The present locomotive brake system includes a brake controller operable by an operator and a brake pipe vent valve. The brake controller includes an emergency output port which provides emergency pneumatic signal on the emergency output port when the brake controller is in an emergency position. The brake pipe vent valve includes a housing having brake pipe, emergency input and exhaust ports, and first and second valves. The emergency output port is fluidly connected to the emergency input port. The first valve selectively connects the brake pipe port to the exhaust port when opened in response to an emergency signal on the brake pipe port. The second valve selectively connects the brake pipe port to the exhaust port when opened in response to an emergency signal on the emergency input port. | 05-14-2009 |
20090160245 | ANTI-ROLLAWAY DEVICE FOR TRUCKS AND EQUIPMENT WITH FLUID AND ELECTRICALLY ACTUATED BRAKES - A vehicle anti-rollaway device includes a first switch responsive to the presence and absence of an operator at a predetermined location in the vehicle for controlling the on/off state of parking brake of the vehicle in the form of either a servo controlled parking brake or a fluid controlled parking brake. The device can also include a speed control responsive to a speed of the vehicle for controlling the on/off state of the parking brake as a function of the speed of the vehicle. The device can also include a second switch operative for controlling the response of the parking brake to the state of the first switch. | 06-25-2009 |
20090189438 | Vehicle brake system - A brake system for a vehicle includes brake cylinders operated by pressurized fluid for actuation of brakes by means of pressurized fluid on at least one first axle of the vehicle. The brakes on at least one other, second, axle can be actuated exclusively electromechanically in response to an electrical braking request signal. The pressure of the pressurized fluid can be modulated indirectly or directly and the electrical braking request signal can be generated indirectly or directly in response to actuation of a brake pedal of a brake pedal device. A service brake function is provided by means of hybrid use of the brakes on the first axle(s) together with the brakes on the second axle(s). The brake cylinders operated by pressurized fluid are pneumatically operated brake cylinders. The pressure modulated by the brake pedal device is a pneumatic pressure, and the pressurized fluid is compressed air. | 07-30-2009 |
20090206650 | PARKING BRAKE CONTROL DEVICE - The parking brake control device sets a lock control target tension TTAR to a value which depends on the brake fluid pressure (i.e. M/C pressure), wherein the lock control target tension TTAR is used as a threshold determining whether the condition for terminating a lock control is satisfied or not. This operation is aimed for compensating the decrease of the tension applied to the brake cable which occurs caused by the service brake when the service brake is operating and does not occur when the service brake is not operating. Therefore, it is possible to prevent the service brake from causing a problem in which the lock control is terminated while a desired brake force is not achieved at the EPB. | 08-20-2009 |
20090230762 | Brake System for Motor Vehicles - Disclosed is a brake system for a motor vehicle having actuating unit ( | 09-17-2009 |
20090236903 | BRAKE CONTROL SYSTEM - A brake control system for a vehicle includes a first controller having a first brake operation quantity sensor and a second controller executing a different control from that of the first controller and having a second operation quantity sensor. The second controller may include a master pressure acquisition unit for acquiring a master pressure and a failure detection unit for detecting a failure of the first controller on the basis of the brake operation quantity detected by the second brake operation quantity sensor and the master pressure acquired by the master pressure acquisition unit. | 09-24-2009 |
20090243374 | Brake system for a motorcycle including vibration-damping support structure, and motorcycle incorporating same - In a brake system for a motorcycle in which a pressure-regulating unit is interposed between a wheel brake and fluid pressure generating unit capable of generating a fluid pressure independently of an operation of a brake operating element is controlled by a control unit based on a value detected by an operating amount detector which detects an operating amount of the brake operating element. To prevent adverse influences of not only vibrations from an engine, but also heat from the engine, from being exerted on the pressure-regulating unit, such is floatingly supported by a support supported on a body frame of the motorcycle through an elastic case covering the pressure-regulating unit. | 10-01-2009 |
20090243375 | Motorcycle including brake-by-wire system with flexibly supported pressure-generating unit - In a brake system for a motorcycle in which the operation of a pressure-regulating unit interposed between fluid pressure-generating unit and a wheel brake so as to regulate an output fluid pressure of the fluid pressure-generating unit and to apply the regulated fluid pressure to the wheel brake is controlled by a control unit on the basis of a value detected by operating amount detector for detecting an operating amount of a brake operating element, to arrange the fluid pressure-generating unit in a location which is close to the pressure control unit disposed on the rear side of an engine body and in which an installation space is easy to secure. The fluid pressure-generating unit, laid out in plan view between a left-right pair of seat rails which constitute a part of a body frame and which support a riders' seat, is supported by the seat rails. | 10-01-2009 |
20090243376 | Motorcycle including brake-by-wire system with flexibly supported fluid pressure regulating unit - In a brake system for a motorcycle in which the operation of a pressure-regulating unit interposed between fluid pressure generator and a wheel brake is controlled by a control unit on the basis of a value detected by operating amount detector for detecting an operating amount of a brake operating element, to prevent the influence of vibrations transmitted from an engine from being exerted on the pressure-regulating unit. A support member for supporting the pressure-regulating unit is flexibly supported, though elastic members, by a pair of frame sections which are arranged on both the left and right sides of an engine body and by a crossmember which connects both the frame sections to each other on the rear side of the engine body so as to constitute a part of a body frame F together with the frame sections. | 10-01-2009 |
20090256415 | REDUNDANT HARDWARE ARCHITECTURE FOR THE LOW-VOLTAGE POWER SUPPLY STAGE OF THE BRAKING SYSTEM OF A VEHICLE IN WHICH EACH OF THE WHEELS ARE CONNECTED TO AT LEAST ONE ROTARY ELECTRICAL MACHINE - An electric braking system is provided for a road vehicle that includes at least two wheels ( | 10-15-2009 |
20090302673 | METHOD FOR OPERATING A COMBINED VEHICLE BRAKING SYSTEM - A method for operating a combined vehicle braking system comprising hydraulically actuable wheel brakes on a front axle of a motor vehicle and electromechanically actuable wheel brakes on a rear axle of the motor vehicle is described. The method comprises the steps of (a) driving the wheels of the rear axle by an electric motor which is configured to be operated as a generator in order to recover braking energy at the rear axle; (b) detecting a driver's braking request; (c) communicating the driver's braking request to a control unit which is configured to implement a braking force distribution for the electric motor and the wheel brakes on the front axle and the rear axle; and (d) implementing the braking force distribution in the range of low vehicle deceleration such that a proportion of extracted braking force at the rear axle is greater than that of the front axle. | 12-10-2009 |
20090309412 | TRAVELING WORKING MACHINE - The present invention relates to a traveling working machine, in particular a hydraulic excavator, with a traveling gear and with a hydraulic service brake system for the traveling gear, which is supplied with brake pressure via at least one brake valve. In accordance with the invention, the brake valve can be actuated electrically, wherein it is connected with a control element via an electric control line, by means of which an operator can brake the traveling working machine. | 12-17-2009 |
20100001577 | Brake system - A brake system including: a master cylinder that generates brake fluid pressure in response to a braking action of a driver, a wheel cylinder that brakes a wheel when actuated by brake fluid pressure, and an electric fluid pressure generator which also generates brake fluid pressure, is connected to the master cylinder through a first fluid passage, and is connected to the wheel cylinder through a second fluid passage. The electric fluid pressure generator being actuated to generate brake fluid pressure by an electric signal corresponding to the braking action of the driver. The system also includes an opening-closing valve that allows and prevents a communication through the first fluid passage and a controller that controls operation of the electric fluid pressure generator and operation of the opening-closing valve. When ending a braking action of the wheel cylinder, the controller closes the opening-closing valve and makes the electric fluid pressure generator output negative fluid pressure to the second fluid passage | 01-07-2010 |
20100007199 | BRAKE SYSTEM FOR VEHICLE - A brake system for a vehicle is disclosed. The brake system has a dual electronic control unit that classifies electromechanical brake units into two groups. When a vehicle is not smoothly braked due to an error generated in the electro-mechanical brake unit of either of two groups, the brake system smoothly brakes the vehicle using the other electromechanical brake unit having no error. The system includes a pedal, a pedal position detection sensor detecting a moving distance of the pedal when a driver presses the pedal, an electromechanical brake unit to provide each wheel with electrical braking force in response to the pedal's moving distance detected, and a dual electronic control unit to divide the electromechanical brake unit providing each wheel with the electrical braking force into two groups, and brake the vehicle by the electromechanical brake unit of each group. | 01-14-2010 |
20100026083 | Brake System with Electromotively Driven Piston/Cylinder System - The invention relates to a brake system which comprises an actuating device ( | 02-04-2010 |
20100078988 | VALVE UNIT FOR AN ELECTRO-PNEUMATIC BRAKE CONTROL DEVICE - The invention relates to a valve unit ( | 04-01-2010 |
20100084912 | Emergency Protection For Remote Control Braking Systems - A locomotive brake system including an electronic air brake controller for controlling at least a train brake pipe in a standard EAB mode and remote mode of the brake system and a remote locomotive controller for providing braking signals to the electronic air brake controller and an electrical emergency signal in the remote mode. A magnetic valve is connected to the train brake pipe for providing a pneumatic emergency signal on the train brake pipe in the remote mode when energized in response to the electrical emergency signal from the remote locomotive controller or upon failure of the remote locomotive controller. A cut-in system is connected to the remote locomotive controller and the magnetic valve to provide an electrical emergency signal to the magnetic valve when the cut-in system is initially activated. | 04-08-2010 |
20100109426 | Portable control device for wireless communication with air brake line airflow manipulating device - An apparatus in one example comprises an airflow manipulating device, a portable control device, and an air pressure sensor. The airflow manipulating device is disposed between a source of compressed air and an air brake line of a train consist. The portable control device is in wireless communication with the airflow manipulating device. The portable control device is transportable by a user along the train consist during inspection of the air brake line. The portable control device is adapted to transmit a control signal over a wireless communication channel to move a valve in the airflow manipulating device to a position that causes an increase or decrease of air pressure in the air brake line. The air pressure sensor measures an air pressure level in the air brake line for wireless transmission to the portable control device. | 05-06-2010 |
20100187899 | PUMP CONTROL APPARATUS AND BRAKE CONTROL SYSTEM - In a pump control apparatus that controls the discharge of brake fluid using the rotation of a motor, the number of windings in a low speed circuit is set such that the motor operates at a second rotation speed when the low speed circuit is connected to a power supply. A high speed circuit shares a portion of the windings of the low speed circuit so that the motor operates at a first rotation speed when a power supply voltage is supplied to an input terminal which is disposed midway in the windings of the low speed circuit. An ECU determines the load state of the motor based on a difference between the output voltage at an output terminal and the power supply voltage. | 07-29-2010 |
20100187900 | HYDRAULIC POWER BRAKE SYSTEM - The invention relates to a hydraulic power brake system comprising a manually operated brake valve ( | 07-29-2010 |
20100244547 | BRAKE EQUIPMENT FOR A LAND VEHICLE - Brake equipment comprising a hydraulic, single- or multi-circuit braking system of a land vehicle having an electric drive for executing a regenerative braking of the land vehicle by means of at least one electric machine in or on the drive train of the vehicle and also a braking of the land vehicle by means of at least one wheel brake. A brake pedal and at least one sensor are used to detect a braking requirement of the driver. A master cylinder is used to supply pressurized hydraulic fluid into at least one brake circuit that supplies at least one wheel brake in accordance with the braking requirement. Associated with at least one brake circuit is an electrohydraulic control unit comprising at least a first connection for hydraulic fluid and at least a second connection for hydraulic fluid. An electronic control unit controls components of the electrohydraulic control unit such as a hydraulic pump and switching valves as a function of a braking requirement and/or sensor signals that represent ambient quantities or characteristic quantities coming from the braking system. A regenerative brake unit has at least a first connection for hydraulic fluid and at least a second connection for hydraulic fluid and is hydraulically coupled into at least one of the brake circuits between the master cylinder and at least one of the wheel brakes. The regenerative brake unit is actuated by the electronic control unit to bring about the effect that, in the event of a regenerative braking operation, the volume of hydraulic fluid corresponding to the braking requirement is not supplied into the wheel brakes, but is stored. | 09-30-2010 |
20100259095 | SUPPLEMENTARY BRAKING THRUST APPARATUS FOR BRAKE AND SUPPLEMENTARY METHOD THEREOF - Disclosed is a supplementary braking thrust apparatus for a brake, comprising a thruster ( | 10-14-2010 |
20100270854 | BRAKE CONTROL APPARATUS AND METHOD FOR CONTROLLING THE SAME - A brake control apparatus obtains a required braking force using a hydraulic braking force in combination with a regenerative braking force. The brake control apparatus includes a hydraulic brake unit that controls the hydraulic braking force. When the deviation of an actual hydraulic pressure from a target pressure falls outside a permissible range (d), the hydraulic brake unit controls the actual hydraulic pressure in such a manner that the deviation falls within the permissible range. On the other hand, when the deviation is within the permissible range (d), the hydraulic brake unit maintains the actual hydraulic pressure. The hydraulic brake unit includes a control unit that detects timing (Ta) at which usage of the hydraulic braking force needs to be started to compensate for a deficiency from the required braking force, and that raises (r) the target pressure at the detected timing (ta). | 10-28-2010 |
20100295362 | DEVICE AND METHOD FOR DETECTING A BRAKE OPERATION - A method for detecting the operation of a foot brake pedal of a motor vehicle brake system including a vacuum brake booster having a working chamber and a vacuum chamber. The operation of the brake pedal is able to be detected already during free travel if the pressure present in the working chamber and/or in the vacuum chamber is measured and the measured pressure or a pressure difference is evaluated. | 11-25-2010 |
20110025119 | Brake Control System - A brake control system that enables accurate brake control is provided that precisely detects a master-cylinder pressure and includes a back-up function. The brake control system includes a master-cylinder operated by a brake operation of a driver; a first mechanism that regulates a pressure inside the master-cylinder according to the brake operation amount; a first control apparatus that controls operation of the first mechanism; a second mechanism that regulates communication of the pressure inside the master-cylinder to a wheel-cylinder; and a second control apparatus that controls operation of the second mechanism and operation of a pump apparatus that increases a pressure communicated to the wheel-cylinder. The first and second control apparatuses each have a power supply circuit and CPU. The brake control system further includes a first hydraulic pressure sensor that measures a pressure inside the master-cylinder and is electrically connected to the first control apparatus, and a second hydraulic pressure sensor that measures a pressure inside the master-cylinder and is electrically connected to the second control apparatus. | 02-03-2011 |
20110049969 | HYDRAULIC CONTROL METHOD OF REGENERATIVE BRAKING SYSTEM FOR VEHICLE - Disclosed herein is a hydraulic control method of a regenerative braking system for vehicles in which a point of time when regenerative braking torque starts to be reduced is predicted and hydraulic control is performed in advance prior to this point of time so as to improve braking performance. A hydraulic braking control unit predicts the point of time when regenerative braking torque starts to be reduced based on vehicle velocity and starts hydraulic control in advance prior to this point of time, thereby improving responsiveness of hydraulic braking force compared to the regenerative braking torque to satisfy braking force required by a driver, and minimizing a deceleration change at the end of regenerative braking to improve braking performance. | 03-03-2011 |
20110074204 | REGENERATIVE BRAKING SYSTEM - Disclosed is a regenerative braking system capable of minimizing uncomfortable feeling during the braking operation while improving responsiveness and control performance by performing the braking operation using an electric motor. An electro-mechanical braking system is used when braking a rear wheel or front and rear wheels, so variable frictional braking is achieved, thereby maximizing the recovery rate of the regenerative energy. | 03-31-2011 |
20110115281 | BRAKE CONTROL APPARATUS OF HYBRID VEHICLE, AND METHOD THEREOF - A braking control method of a braking control apparatus for a hybrid vehicle, may include accumulating a brake fluid amount bypassed to a reservoir tank during regenerative braking cooperation control performed by a brake demand, finishing the regenerative braking cooperation control when the accumulated brake fluid amount surpasses a predetermined value, and resetting the accumulated brake fluid amount when a brake pedal is released and a predetermined time elapses. | 05-19-2011 |
20110115282 | BRAKE SYSTEM FOR MOTOR VEHICLES - A brake system includes a main brake cylinder and a pedal decoupling unit provided with a holding piston, the first ring surface thereof together with a first primary brake cylinder piston defining a first hydraulic chamber that is hydraulically pressurized with an electrically controllable pressure supply device. In order to improve the pedal characteristics of the brake system, in particular in a brake-by-wire brake system, the holding piston is embodied as a differential piston, the second ring surface thereof defining a second, blockable hydraulic chamber, and a piston effect in the second chamber corresponds to a force that acts counter to the direction of actuation on the holding piston. | 05-19-2011 |
20110121640 | RAIL VEHICLE BRAKE CONTROL DEVICE - A rail vehicle brake control device includes a brake control unit that is mounted on each truck and generates a pressure control signal for controlling a brake cylinder pressure that acts on a brake cylinder based on a service brake command and an emergency brake command, an electromagnetic valve unit that includes a brake control valve that adjusts a pressure of compressed air supplied to the brake cylinder according to the pressure control signal, and a relay valve that outputs the brake cylinder pressure corresponding to the compressed air supplied from the electromagnetic valve unit. The electromagnetic valve unit includes a release isolation magnet valve that adjusts a pressure of the compressed air supplied to a primary side of the relay valve, and the release isolation magnet valve is operated by receiving power source supply from a brake control device mounted on another truck. | 05-26-2011 |
20110127828 | METHOD OF MANAGING THE BRAKING OF AN AIRCRAFT, AND A CORRESPONDING BRAKING SYSTEM - The invention relates to a method of managing the braking of an aircraft having landing gear with wheels fitted with friction brakes and with auxiliary brakes that enable energy to be dissipated by means other than friction, the method comprising the steps of:
| 06-02-2011 |
20110148184 | BRAKING CONTROL APPARATUS FOR ELECTRIC VEHICLE - In a braking control apparatus for an electric vehicle, a target braking torque command value calculation section calculates a target braking torque command value on a basis of at least one of a state of road wheels and a braking request by a vehicle driver, a frequency component decomposition section decomposes a target braking torque command value into a first frequency component lower than a resonance frequency of a drive train and a second frequency component equal to or higher than the first frequency component, and a braking force control section provides an electrical braking torque for road wheels on a basis of a motor torque command value corresponding to the first frequency component and provides a frictional braking torque for the road wheels on a basis of a frictional braking torque command value corresponding to the second frequency component. | 06-23-2011 |
20110175435 | BRAKE DEVICE FOR A MOTOR VEHICLE HAVING A PRESSURE ACCUMULATOR - In a brake device for a motor vehicle having a first and a second hydraulic brake circuit, the second brake circuit is decoupled from the main brake cylinder in partial braking operations, and is operated with the aid of a pressure accumulator controlled by a control device, which takes an additional deceleration effect due to an active power component, e.g., a generator, into account. | 07-21-2011 |
20110210604 | BRAKING CONTROL APPARATUS - In a braking control apparatus, a plurality of pumps are driven by a common first motor. A brake supplies operating fluid to pipelines by operating the first motor, and controls opening/closing of a fluid pressure regulating valve so as to make the wheel cylinder pressure in the right front wheel approach the right front wheel target pressure, and controls opening closing of a fluid pressure regulating valve so as to make the wheel cylinder pressure in the left rear wheel approach the left rear wheel target pressure. In the case where the right front wheel target pressure is zero when the fluid pressure regulating valve is to be opened so as to make the wheel cylinder pressure in the left rear wheel approach the left rear wheel target pressure, the brake turns off the first motor. | 09-01-2011 |
20110241418 | BRAKE CONTROL SYSTEM - An object of the present invention is to simplify a control during regenerative cooperation in a brake control system generating a hydraulic pressure in a master cylinder by displacing a piston with use of an electric actuator according an operation amount of a brake pedal. The brake control system displaces the primary piston | 10-06-2011 |
20110248557 | BRAKE BOOSTER COUPLING DEVICE - A brake booster coupling device is described having a braking piston, an input piston, which is displaceable in the event of an operation of a brake input element from its starting position by a driver braking distance, a force transmission between the input piston, which is displaced by a driver braking distance below a predefined threshold value, and the braking piston is suppressed, and a booster piston, which is displaceable with the aid of the brake booster drive in such a way that the braking piston, which contacts the booster piston, is displaceable with the aid of the brake booster drive from a non-braking position into at least one braking position, the brake booster coupling device including a contact element, which is displaceable and/or deformable in the event of a displacement of the braking piston from the non-braking position into the at least one braking position in such a way that a first contact surface of the contact element contacts a second contact surface of the input piston, which is displaced by a driver braking distance from the threshold value, in such a way that a driver brake force is transmittable via the contact element to the braking piston. | 10-13-2011 |
20110248558 | Brake System for a Motor Vehicle and Method for Controlling said Brake System - A brake system for a motor vehicle includes a muscular power-operated or auxiliary power-operated brake system having a master brake cylinder which is operated by muscular power and which is connected to at least one hydraulic wheel brake, and an externally powered brake system having a hydraulic pressure source which is operated by external power and which is connected to the at least one hydraulic wheel brake. The brake system allows for an unchanged pedal characteristic in a hybrid vehicle which has an electric drive motor in addition to a combustion engine, which motor is used as a generator when the brake is actuated. | 10-13-2011 |
20110248559 | Method For Controlling The Activation Of A Hydraulic Vehicle Brake System And Electromechanical Brake Booster - A method for controlling the activation of a hydraulic vehicle brake system of a hybrid vehicle, which can be braked by generator operation of an electric drive motor, includes compensating for the braking effect of the electric drive motor and reducing a wheel brake pressure in the wheel brakes of the vehicle wheels by opening brake pressure-reducing valves, which are braked with the electric drive motor. | 10-13-2011 |
20110254357 | BRAKE SYSTEM FOR A MOTOR VEHICLE AND METHOD FOR CONTROLLING THE SAME - The invention relates to a hybrid brake system having a hydraulic service brake system and an electromechanical service brake system. According to the invention, a brake booster is designed as a pedal simulator, which can be used to boost power and to generate a pedal power which is counter to the direction of actuation. When the hydraulic service brake system fails, the electromechanical service brake system is used for braking and the brake booster generates a pedal power which allows or facilitates dosage of the brake actuation. | 10-20-2011 |
20110254358 | METHOD FOR CONTROLLING A BRAKE ACTUATION OF A HYBRID VEHICLE SIMULATOR - The invention relates to a method for controlling the activation of a brake of a hydraulic vehicle brake system of a hybrid vehicle which can be braked by the generator mode of an electric drive motor. The invention proposes equipping the vehicle brake system with an electromechanical brake booster and generating a pedal force at a brake pedal with the brake booster when braking by the generator mode of the electric drive motor occurs. | 10-20-2011 |
20110278913 | REGENERATIVE BRAKE CONTROL METHOD - Disclosed herein is a regenerative brake control method of a regenerative brake system using an electronic control brake, which is devised to increase a regenerative brake energy recovery rate of a vehicle via brake hydraulic pressure control under low brake pressure conditions. The regenerative brake control method includes determining whether or not regenerative brake cooperative control of non-drive wheels is necessary based on a vehicle speed and driver requested brake force, and selecting whether or not to perform the regenerative brake cooperative control, thereby achieving vehicle braking stability. If the regenerative brake cooperative control is necessary, brake hydraulic pressure of non-drive wheels are controlled to increase regenerative brake force of drive wheels, which increases a regenerative brake energy recovery rate. | 11-17-2011 |
20110285198 | BRAKE APPARATUS, BRAKE CONTROL UNIT, AND BRAKE CONTROL METHOD - There is provide a brake control technology according to which a target hydraulic pressure is reliably achieved when a hydraulic pressure is decreased during hydraulic control and brake drag does not occur even when the target hydraulic pressure is zero. In a brake apparatus, a dead-band region is set for the target hydraulic pressure that is used in the hydraulic control. When braking control is switched from the hydraulic control to regenerative control in cooperative braking control, residual pressure reduction control is executed. In the residual pressure reduction control, the target hydraulic pressure is set to a value that is lower than zero to which the hydraulic pressure should be brought. | 11-24-2011 |
20110285199 | BRAKE DEVICE - A brake device includes: a mechanical pressure regulating part having a high-pressure port, a low-pressure port, a pilot pressure input port, and an output port which outputs fluid pressure corresponding to the pressure supplied to the pilot pressure input port by fluid pressures supplied to both of the high- and low-pressure ports, to a chamber for a master piston; a high-pressure source connected to the high-pressure port and the pilot pressure input port; a low-pressure source connected to the low-pressure port and the pilot pressure input port; and an electrically-operated pilot pressure generating part which includes control valves for controlling flows of the brake fluid between the high-pressure source and the pilot pressure input port, and between the low-pressure source and the pilot pressure input port, respectively, and which outputs desired fluid pressure to the pilot pressure input port by controlling flow of the brake fluid with control valves. | 11-24-2011 |
20110291470 | ELECTROHYDRAULIC BRAKE SYSTEM AND METHOD FOR OPERATING THE SAME - Disclosed is an electrohydraulic brake system for use in vehicles which can be braked by means of generator operation of an electric drive motor. The brake system comprises, inter alia, a brake booster and an electronic control unit which is provided for distributing the braking effect between a generative component or recuperation braking component and a friction braking component. In order to optimize the take-up of pressure medium, in particular during recuperation braking, the brake booster ( | 12-01-2011 |
20110316327 | Brake Control System For Dual Mode Vehicle - A brake control system is provided for a utility vehicle having manned and unmanned operational modes. The brake control system includes a hydraulically operated brake. A manually operated brake circuit and an electro-hydraulic (E-H) brake circuit are connected to the brake. The E-H brake circuit includes a pump, a solenoid operated inlet valve, an accumulator, and first and second solenoid operated brake valve connected between the brake and the inlet valve. A first CPU is operatively connected to the inlet valve and to the first brake valve. A second CPU is operatively connected to the inlet valve and to the second brake valve. An accumulator pressure sensor senses the accumulator pressure. A brake pressure sensor senses brake pressure. The first and second CPUs control the inlet valve and the brake valves as a function of the sensed accumulator pressure and brake pressure. | 12-29-2011 |
20120007417 | BRAKE DEVICE FOR VEHICLE - At a time (t | 01-12-2012 |
20120038208 | VEHICLE BRAKING DEVICE - In a vehicle capable of performing regenerative braking and fluid pressure braking, in changing from the regenerative braking to the fluid pressure braking in response to a decrease of a vehicle speed due to braking, a fluid pressure braking force is increased from 0 at a first increasing rate when the vehicle speed falls to or below a first threshold value (V | 02-16-2012 |
20120056470 | BRAKING CONTROL METHOD FOR ELECTRIC VEHICLE - The present invention features braking control methods for an electric vehicle. Such methods include identifying a vehicle operational condition occurring during regenerative braking that reduces regenerative braking capacity; linearly reducing the amount of regenerative braking of a motor of the electric vehicle after identifying such a vehicle operational condition; and at the same time, increasing the amount of hydraulic braking of a hydraulic braking system to compensate for the reducing of the amount of regenerative braking. Such operational conditions include when the temperature of a motor or battery is increased above a predetermined level during regenerative braking or when the shift lever is shifted to Neutral (N) position by a driver during regenerative braking. | 03-08-2012 |
20120056471 | Braking System for a Land Vehicle with Regenerative Braking Functionality - A brake unit for a hydraulic, single- or multi-circuit brake system of a land vehicle with electric drive for carrying out regenerative braking by means of at least one electrical machine in or at the drive train of the vehicle and braking by means of at least one friction brake, wherein a brake pedal and at least one sensor for detecting a braking request of the driver is provided, a master cylinder for feeding pressurized hydraulic fluid into at least one brake circuit in accordance with the braking request, wherein a dividing cylinder is provided, which has a first hydraulic chamber and a second hydraulic chamber divided from the first by a dividing piston, wherein the first hydraulic chamber has a first port, which is connected to the master cylinder, and a second port, which is connected by a simulation valve to a line leading to the wheel brakes, and the second hydraulic chamber is connected by a shut-off valve to the low-pressure storage chamber, and an orifice is disposed in a connection line between the simulation valve and the low-pressure storage chamber. | 03-08-2012 |
20120062023 | BBW BRAKE DEVICE - A brake fluid pressure electrically generated by a slave cylinder ( | 03-15-2012 |
20120074767 | VEHICLE BRAKE SYSTEM - A vehicle brake system is provided with a hydraulic brake device, a regenerative brake device incorporating a generator motor, and a brake control device. The control device includes a section for calculating a driver target brake force for each wheel corresponding to a manipulation amount of a braking manipulation member, a section for enabling the brake control device itself to set compensation brake forces for respective wheels, a section for selecting a larger one of the driver target brake force and the compensation brake force for each wheel and for subtracting a base hydraulic brake force from the selected brake force to set differences for respective wheels as compensated target brake forces for the wheels, and a section for controlling the distribution of the compensated target brake force for each wheel to a controlled hydraulic brake force for each wheel and a regenerative brake force for each driving wheel. | 03-29-2012 |
20120074768 | VEHICLE BRAKE SYSTEM - Vehicle brake system comprises a hydraulic brake device, a regenerative brake device to drive wheels driven by a generator-motor and a brake control device for cooperatively controlling the hydraulic brake force and the regenerative brake force in response to an operation amount of a brake operation member. This vehicle brake system further includes a differential amount calculating portion calculating a differential amount by subtracting a regeneration execution brake force obtained by execution of the generator-motor from a regeneration request brake force, a regenerative range judging portion for judging whether the regeneration request brake force is within a range of a re-generable brake force which is executable by the generator-motor and a hydraulic pressure restricting portion for restricting increase of the hydraulic brake force when the differential amount is a positive value and the regeneration request brake force is within the range of the re-generable brake force. | 03-29-2012 |
20120139328 | AUTOMOTIVE VEHICLE BRAKE SYSTEM - An automotive vehicle braking system includes a hydraulic brake system in communication with a regenerative brake system. The regenerative brake system has both a fixed system logic portion and a user-adjustable system logic portion. The fixed system logic of the regenerative brake system is driven by a brake member displacement. | 06-07-2012 |
20120139329 | REGENERATIVE BRAKING SYSTEM - An automotive vehicle braking system includes a regenerative brake system operable upon a deceleration request from at least one of an acceleration member and a braking member. At least a portion of the deceleration request is adjustable by a user when the deceleration request is provided by the acceleration member. | 06-07-2012 |
20120139330 | BRAKE CONTROL SYSTEM FOR AN ELECTRICALLY DRIVEN VEHICLE - During regenerative coordinate braking control, a target brake force is defined by eliminating influences of brake system component tolerances to achieve a comfortable brake feel and secure regenerative energy. A brake control system includes a master cylinder, wheel cylinders, a VDC brake fluid pressure unit and a motor controller. In response to a brake pedal operation by a driver, a brake pedal stroke position is detected at which a pressure in a master cylinder actually begins to be generated. A target deceleration characteristic is adjusted from a theoretical characteristic so that the target deceleration equals a maximum value of an add-on brake force (i.e., the regenerative brake gap) at the detected brake pedal stroke position. | 06-07-2012 |
20120161504 | BRAKE CONTROL APPARATUS - A brake control apparatus for a vehicle having a regenerative braking system, has first to fourth brake circuits, a pump, a gate-out valve, an inflow valve, an outflow valve, a reservoir, a fluid suction cylinder, a branch oil passage, a switch valve, a regulation valve, and a hydraulic pressure control unit. The hydraulic pressure control unit controls a brake fluid pressure by operating the gate-out valve, the inflow valve, the outflow valve, the switch valve and the pump in accordance with a regenerative operation state of the regenerative braking system. Also the hydraulic pressure control unit stores the brake fluid flowing out from a master cylinder in the fluid suction cylinder by operating the pump when the regenerative braking system works, and supplies the brake fluid stored in the fluid suction cylinder to a wheel cylinder when a regenerative braking amount of the regenerative braking system lowers. | 06-28-2012 |
20120193973 | HYDRAULIC VEHICLE BRAKING SYSTEM, VEHICLE HAVING SUCH A BRAKING SYSTEM, AND METHOD FOR OPERATING A HYDRAULIC VEHICLE BRAKING SYSTEM - A hydraulic vehicle brake system has a pedal travel simulator having a primary chamber and a secondary chamber, between which a piston is situated so as to be displaceable, the secondary chamber being fluidically connected to a storage chamber. Brake fluid from the storage chamber is able to be supplied via a hydraulic pump. | 08-02-2012 |
20120200147 | BOOSTER AND BRAKE APPARATUS USING THE SAME - An input rod is operated by a brake pedal to introduce the air into a variable-pressure chamber through a control valve to propel a power piston, thereby advancing a primary piston to generate a brake fluid pressure in a master cylinder. A part of the reaction force from the fluid pressure is transmitted to the input rod through a reaction member. The primary piston is provided with an idle stroke in which no fluid pressure is generated, and the reaction force to be transmitted to a plunger is limited by a reaction force adjusting spring. In the region of the idle stroke, a fluid pressure is supplied to a wheel cylinder through a fluid pressure control unit to perform regenerative cooperative control, and a reaction force from a reaction spring is applied to the input rod. | 08-09-2012 |
20120256476 | Main Brake Cylinder for a Hydraulic Vehicle Brake System and Method for Operating Same - A main brake cylinder for a hydraulic vehicle brake system of a motor vehicle is disclosed. The main brake cylinder includes an electric motor that is operated as a generator for decelerating the motor vehicle. For service braking, pressure is applied to a brake circuit by the main brake cylinder and to another brake circuit by a hydraulic pump. In order to reduce a pedal force, a first piston has a smaller piston surface and a second piston only moves if a greater brake fluid volume is required. A preloaded hydraulic accumulator limits an increase in pressure. | 10-11-2012 |
20120299367 | METHOD FOR OPERATING A BRAKE SYSTEM FOR A MOTOR VEHICLE AND BRAKE SYSTEM - A method in which a brake system for a motor vehicle is controlled and/or regulated. The motor vehicle having at least one electrically regenerative brake and a pressure-medium-operated, in particular a hydraulic brake system with friction brakes, wherein the wheel brakes assigned to the individual wheels are arranged in at least two brake circuits which can be charged with a pressure medium by a first brake pressure generator, in particular a tandem master brake cylinder, and wherein each brake circuit includes at least one pressure accumulator and at least two electronically activatable hydraulic valves. During a braking process with the one or more electrically regenerative brakes, by suitable activation of at least one hydraulic valve, at a point in time, the pressure medium is discharged only into precisely one predetermined pressure accumulator. The invention also relates to a corresponding brake system. | 11-29-2012 |
20120313426 | Mixed Braking Device with Optimized Control - A braking device including a dissipative braking system, an electric braking system, and a first actuating device combined with the dissipative braking system. A second actuating device is combined with the electric braking system and a position sensor is combined with the second actuating device. This second actuating device is designed to drive the first actuating device after a non-zero travel from its inactive position, and the sensor is designed to drive the electric brake system according to the displacement travel of the second actuating device from its inactive position. | 12-13-2012 |
20120319463 | MECHANICAL BYPASS VALVE FOR REGENERATIVE AIR BRAKE MODULE - An air braking system for a vehicle blends regenerative and foundation braking during low deceleration conditions in an effective and controlled manner. The braking system also includes a mechanical override that bypasses system electronics in response to an aggressive brake request such that treadle circuit pressure is sent directly to a brake relay circuit to actuate vehicle brakes. | 12-20-2012 |
20120319464 | REGENERATIVE AIR BRAKE MODULE - An air braking system for a vehicle blends regenerative and foundation braking during low deceleration conditions in an effective and controlled manner. The braking system also includes a mechanical override that bypasses system electronics in response to an aggressive brake request such that treadle circuit pressure is sent directly to a brake relay circuit to actuate vehicle brakes. | 12-20-2012 |
20120319465 | Brake Control Apparatus - A brake control apparatus for a vehicle provided with a regenerative braking system includes a hydraulic circuit where a first passage connects a master cylinder to a wheel cylinder. A second passage connects a discharge side of a pump to a first portion of the first passage. A third passage connects a suction side of the pump to a second portion of the first passage between the master cylinder and the first portion. A fourth passage connects the suction side of the pump to a third portion of the first passage between an inflow valve and the wheel cylinder. A reservoir is connected to the third passage and a portion of the fourth passage between an outflow valve and the suction side of the pump. A shut-off valve restricts brake fluid discharge through a discharge-side valve from the pump being driven. | 12-20-2012 |
20130002008 | Brake Control Apparatus - A brake control apparatus for a vehicle provided with a regenerative braking system includes a hydraulic circuit where a first passage connects a master cylinder to a wheel cylinder. A second passage connects a discharge side of a pump to a first portion of the first passage. A third passage connects a suction side of the pump to a second portion of the first passage between the master cylinder and the first portion. A fourth passage connects the suction side of the pump to a third portion of the first passage between an inflow valve and the wheel cylinder. A reservoir is disposed in a section of the fourth passage between the outflow valve and third passage. A cutoff valve in a section of the fourth passage between the reservoir and third passage operates depending on operation of the regenerative braking system. | 01-03-2013 |
20130009454 | REGENERATIVE BRAKING SYSTEM FOR VEHICLE - A regenerative braking system for a vehicle improves accuracy of a control. The regenerative braking system for a vehicle is operated by hydraulic pressure. The regenerative braking system may include a first cylinder adapted to directly generate hydraulic pressure by a driver's maneuver; a second cylinder adapted to generate hydraulic pressure necessary for braking of the vehicle and to deliver the hydraulic pressure to a wheel; a hydraulic pressure generator adapted to recognize braking force demanded by the driver and to generate hydraulic pressure; and a first valve interposed between the first cylinder and the second cylinder and adapted to selectively supply the hydraulic pressure generated by the first cylinder to the second cylinder. | 01-10-2013 |
20130020857 | Control Apparatus for Vehicle - In a control apparatus for a vehicle, a brake control unit includes: a master cylinder state variable detecting section configured to detect a master cylinder state variable related to a state of a master cylinder; a first regenerative braking force calculating section configured to calculate a first regenerative braking force when the master cylinder state variable detected by the master cylinder state variable detecting section is smaller than a predetermined state variable; a second regenerative braking force calculating section configured to calculate a second regenerative braking force when the master cylinder state variable detected by the master cylinder state variable detecting section is equal to or larger than a predetermined state variable; and a braking control section configured to calculate the liquid pressure braking force on a basis of at least one of the calculated first and second regenerative braking forces. | 01-24-2013 |
20130020858 | VEHICLE BRAKE DEVICE - In a vehicle brake device, a port is provided at a hydraulic chamber of a master cylinder and communicates with a reservoir tank. A piston movable in the hydraulic chamber for closing the port is provided with at least one piston-side port that faces on the port when at a first position. When a brake pedal is stepped on from a retracted state to move the piston from the first position to a second position spaced from the first position by a predetermined distance, the hydraulic chamber is blocked from the communication with the reservoir tank. The at least one piston-side port is provided therein with an orifice, so that the hydraulic pressure in the hydraulic chamber is raised at the time of a quick stepping of the brake pedal but is allowed to flow to the reservoir tank without being raised at the time of a non-quick stepping. | 01-24-2013 |
20130020859 | VEHICLE BRAKE DEVICE - In a vehicle brake device, when a brake pedal is depressed normally, high regeneration efficiency and high fuel efficiency can be achieved by positively utilizing the regenerative braking force, and early applying of basic hydraulic braking force can be achieved when the brake pedal is suddenly depressed. The vehicle brake device includes an operation force transmitting mechanism on a connecting member between the brake pedal and the master cylinder piston and having first and second rods and a spring member biasing the first and second rods in a direction separating both rods from each other. The operation force transmitting mechanism includes an inner space between both rods and a communication passage allowing communication of the inner space with the exterior. The communication passage restricts the outflow of fluid in the inner space upon an emergency brake pedal depression and allows the outflow thereof upon non-emergency brake pedal depression. | 01-24-2013 |
20130026817 | BRAKE APPARATUS FOR VEHICLE - A brake apparatus includes: a fluid pressure control valve; a fluid pressure pump; a feedback control circuit correcting a control power corresponding to an feedback control target rotation number of a motor and feed the corrected control power to a motor; a feed forward control circuit configured to feed, to the motor, a control power corresponding to an feed-forward control target rotation number of the motor; and an abnormal control fluid pressure generation control device, if a rotation number detector is abnormal, rotating the electric motor with the rotation number higher than the feedback control target rotation number by a margin rotation number, increases the brake fluid passing through the fluid pressure control valve, and changes the control current to be supplied to the fluid pressure control valve so that the wheel cylinder fluid pressure is not changed. | 01-31-2013 |
20130057051 | BRAKE APPARATUS FOR VEHICLE - A brake apparatus includes: a master cylinder generating a master cylinder fluid pressure; a wheel brake device applying a braking force to the wheels; a control fluid pressure generation device including a fluid pressure control valve and a fluid pressure pump; an electric motor driving the fluid pressure pump; a control fluid pressure setting unit setting a control fluid pressure; wherein the control fluid pressure generation device rotates the electric motor to circulate a brake fluid and applies a control current to the fluid pressure control valve to thus generate the control fluid pressure in the fluid pressure control valve, and a target rotation number setting unit configured to calculate a pump-necessary discharge flow rate and a brake fluid amount, and set a target rotation number of the electric motor based on the pump-necessary discharge flow rate. | 03-07-2013 |
20130057052 | Brake system for a vehicle and method for operating a brake system of a vehicle - A vehicle brake system and method for operating same, having a master brake cylinder, a brake medium reservoir, and a first brake circuit, connected via a reservoir line to the brake reservoir, having at least one first wheel brake cylinder, a first wheel inlet valve associated with the first brake cylinder, a first pump, by which a first brake medium volume is pumpable from the reservoir line through the open first wheel inlet valve into the first brake cylinder, a continuously adjustable first wheel outlet valve, by which a first brake medium displacement from the first cylinder into the brake reservoir is controllable, and a connecting line having a spring-loaded non-return valve, via which a delivery side of the first pump is connected to the brake reservoir, a brake medium displacement from the brake reservoir to the delivery side of the first pump being prevented by the spring-loaded non-return valve. | 03-07-2013 |
20130057053 | Braking System for an Off-Highway Machine Involving Electric Retarding Integrated with Service Brakes - The disclosure describes, in one aspect, a method of braking a machine having an electric drive configuration. The electric drive configuration includes at least one electric retarding system connected to a first set of wheels. Additionally, a first friction brake system connects to the first set of wheels to provide a braking output torque. A second friction brake system connects to a second set of wheels and provides a second braking output torque. The system calculates and applies a braking ratio between the electric and friction braking systems based upon both user controls and conditions encountered. | 03-07-2013 |
20130057054 | BRAKE DEVICE - A brake device can prevent deterioration of braking force by applying a predetermined pressure in the drive hydraulic pressure chamber even when an electric system failure occurs. The brake device includes a stroke simulator portion, regulator, a first passage connecting the accumulator and the high pressure port of the regulator, a second passage connecting the reservoir tank and the low pressure port of the regulator, a third passage connecting the stroke simulator portion and the pilot pressure input port of the regulator, a fourth passage connecting the drive hydraulic pressure chamber and the output port of the regulator and a fifth passage connecting the accumulator and the drive hydraulic pressure chamber bypassing the high pressure port. The normally open type pressure decrease control valve is provided in the second passage or in the fourth passage whereas the normally closed pressure increase control valve is provided in the fifth passage. | 03-07-2013 |
20130062930 | METHOD AND BRAKE SYSTEM FOR CONTROLLING THE DRIVING STABILITY OF A VEHICLE - The invention relates to a method in which the driving stability of a vehicle is controlled, wherein a yaw rate difference is influenced by an additional yaw moment which is generated at least partially by building up braking torque independently of the driver at one or more wheels. According to the invention, the braking torque which influences the additional yaw moment is variably apportioned between the front axle and the rear axle of the vehicle in an oversteering situation. | 03-14-2013 |
20130062931 | Brake system for a vehicle and method for operating a brake system of a vehicle - A brake system and method for operating same for a vehicle having a master brake cylinder, a brake medium reservoir, a first wheel brake cylinder, into which a first brake medium volume is displaceable from the master cylinder, a second wheel brake cylinder, into which a second brake medium volume is displaceable from the master cylinder, and a pump, which is hydraulically connected to the brake medium reservoir, the first wheel brake cylinder being hydraulically connected to the pump via a first non-return valve and the second wheel brake cylinder being hydraulically connected to the pump via a second non-return valve so that the pump can pump a third brake medium volume from the brake medium reservoir through the first non-return valve into the first wheel brake cylinder and a fourth brake medium volume from the brake medium reservoir through the second non-return valve into the second wheel brake cylinder. | 03-14-2013 |
20130062932 | BRAKE CONTROL APPARATUS - A brake control apparatus for a vehicle provided with a regenerative braking device, the brake control apparatus includes: a first brake circuit connecting a master cylinder configured to generate a brake hydraulic pressure by a brake operation of a driver, and a wheel cylinder to which the brake hydraulic pressure is applied; a booster configured to increase a pressure of a brake fluid within the master cylinder, and to transmit the pressurized brake fluid to the wheel cylinder through a second brake circuit connected with the first brake circuit; a third brake circuit bifurcated from the first brake circuit, and connected with the booster; a reservoir provided on the third brake circuit; and a recirculating device configured to recirculate the brake fluid stored in the reservoir, to the first brake circuit's side. | 03-14-2013 |
20130076113 | Regenerative Braking System for a Hybrid Electric Vehicle and a Corresponding Method - A method and system for controlling regenerative braking of a hybrid electric vehicle. The regenerative braking system has a driver-operable brake pedal, a hydraulically actuated friction brake for at least one front wheel, an anti-lock braking system hydraulically connected to said hydraulically actuated friction brake, and an electrically actuated friction brake for at least one rear wheel. The regenerative braking system further comprises an electric machine connected to said at least one rear wheel and capable of performing regenerative braking of said at least one rear wheel, and an electronic control unit that controls the stability of said hybrid electric vehicle, wherein said regenerative braking system is configured to provide increased braking torque of said front hydraulically actuated friction brake by means of said anti-lock braking system for compensating a decreased or limited rear wheel braking torque initiated by said electronic control unit. | 03-28-2013 |
20130127236 | VEHICLE BRAKE DEVICE AND METHOD OF CONTROLLING THE SAME - An object of the invention is to prevent abnormal noise from being generated when the pressure of brake fluid supplied to a brake caliper is reduced. | 05-23-2013 |
20130134767 | VEHICLE BRAKE DEVICE AND METHOD OF CONTROLLING VEHICLE BRAKE DEVICE - There is provided a vehicle brake device that includes hydraulic brake means for generating a hydraulic brake force and regenerative brake means for generating a regenerative brake force and distributes the hydraulic brake force and the regenerative brake force for a driver-requested brake force. The hydraulic brake means includes a pressure reducing valve that reduces hydraulic pressure of wheel cylinders. The vehicle brake device includes hydraulic brake control means for maintaining the pressure reducing valve open while the driver-requested brake force is covered by only the regenerative brake force. The hydraulic brake control means does not open the pressure reducing valve when hydraulic pressure is present in the wheel cylinders. | 05-30-2013 |
20130134768 | VEHICLE BRAKING SYSTEM - A vehicle braking system includes a master cylinder for producing an upstream hydraulic pressure corresponding to an operation given to a brake operation part, a shut-off valve provided between the master cylinder and a wheel cylinder, a hydraulic-pressure source for producing a downstream hydraulic pressure between the shut-off valve and the wheel cylinder in a close instruction receiving condition of the shut-off valve, and a controller for setting a target value of the downstream hydraulic pressure based on an operation amount and controlling the downstream hydraulic pressure based on the target value. According to the vehicle braking system, a driver is prevented from feeling discomfort through a brake operation without an increase in a power consumption of a shut-off valve provided between the master cylinder and the wheel cylinder. | 05-30-2013 |
20130140877 | BRAKE BOOSTER AND METHOD FOR ITS OPERATION - A regulatable brake booster and to a method and a control unit for operating same. Using the method for operating the brake booster, as well as the embodiment of the brake booster, a reaction on a driver may be avoided or reduced by an offset of the brake pedal or by a changed operating force in response to a change in the supporting force. The change in the supporting force is particularly an adjustment of the braking effect of an hydraulic braking system to the braking effect of a regenerative braking system. | 06-06-2013 |
20130154343 | METHOD FOR OPERATING A REGENERATIVE BRAKING SYSTEM OF A VEHICLE AND CONTROL UNIT FOR A REGENERATIVE BRAKING SYSTEM - A method for operating a regenerative braking system includes increasing a generator braking torque and establishing a setpoint variable with regard to a brake fluid volume to be shifted from a brake master cylinder and/or at least one brake circuit to at least one storage volume, taking into account the increased generator braking torque and a predefined hydraulic efficiency characteristic curve; reducing the generator braking torque and transferring the actual brake fluid volume previously transferred to the at least one storage volume at least partially from the at least one storage volume to the at least one brake circuit; ascertaining at least one reaction variable with regard to a hydraulic reaction of the braking system; and reestablishing the hydraulic efficiency characteristic curve of the braking system, at least taking into account the at least one ascertained reaction variable. A control unit for a regenerative braking system is also described. | 06-20-2013 |
20130154344 | ELECTRIC VEHICLE BRAKE CONTROL DEVICE - A vehicle brake control device includes a master cylinder, a plurality of wheel cylinders, a VDC brake hydraulic pressure unit, a motor controller and an integration controller. When a brake operation is carried out, the integration controller carries out a regenerative brake control which achieves a target deceleration. Additionally, a motor suspension control is carried out which suspends a drive status of the VDC motor when the vehicle velocity is less than a first prescribed value. Furthermore, when the vehicle velocity exceeds a second prescribed value and the brake operation is carried out while the VDC motor is in the suspended status, the value of the target deceleration is set to a lower value than the value of the target deceleration which the driver requests, and a motor reactivation control is carried out which reactivates the VDC motor. | 06-20-2013 |
20130162009 | ELECTRIC VEHICLE REGENERATIVE BRAKING SYSTEM - A method and system for braking a vehicle are disclosed. The vehicle has at least one of an electronic stability control system and an antilock brake system. The vehicle may also include a regenerative brake adapted to apply a regenerative braking torque to slow the vehicle. The vehicle may further include a pressure sensor adapted to sense pressure in a hydraulic brake line. The pressure sensor may be a component of the at least one of the electronic stability control system and the antilock brake system. The vehicle may also include a controller adapted to control the regenerative braking torque of the regenerative brake based on at least the sensed pressure. | 06-27-2013 |
20130169032 | BRAKE SYSTEM FOR A MOTOR VEHICLE AND METHOD FOR OPERATING A BRAKE SYSTEM - A brake system for a motor vehicle includes on at least one wheel, an electric-regenerative brake and a friction brake that can be hydraulically actuated by a first generator of brake pressure using a fluid, wherein the friction brake can be connected via an actuatable inlet valve to the first generator of brake pressure and via a first actuatable outlet valve to a pressure accumulator, so that a volume of fluid applied by the first generator of brake pressure can be diverted via the first outlet valve into the pressure accumulator. The first generator of brake pressure can be connected to the pressure accumulator via a further hydraulic connection having a second actuatable outlet valve. A method for operating a brake system is also disclosed. | 07-04-2013 |
20130181506 | BRAKE SYSTEM FOR A VEHICLE AND METHOD FOR OPERATING A BRAKE SYSTEM FOR A VEHICLE - A brake system includes: a brake actuating element; a first piston-cylinder unit having a first piston displaceable by the brake actuating element actuated by at least a predefined minimum actuation such that a first internal pressure in the first piston-cylinder unit is increased; at least one wheel brake cylinder having a brake pressure which is increased using the increased first internal pressure; a first brake booster; and a second piston-cylinder unit having a second piston displaceable by the first brake booster so that a second internal pressure in the second piston-cylinder unit is increased, and to which the at least one wheel brake cylinder is hydraulically connected such that the brake pressure of the at least one wheel brake cylinder is increased by the increased second internal pressure. | 07-18-2013 |
20130221733 | Brake Control Apparatus - A brake control apparatus includes a first brake fluid passage connecting a master cylinder to a wheel cylinder. A second brake fluid passage is connected to the first brake fluid passage. A first pump pressurizes brake fluid from the master cylinder and sends the pressurized brake fluid to the wheel cylinder through the second brake fluid passage. A third brake fluid passage is branched from the first brake fluid passage, and connected to the first pump. A fourth brake fluid passage is branched from the third brake fluid passage, and connected to the first brake fluid passage. A pressure regulator reservoir is disposed in the fourth brake fluid passage. A second pump sends brake fluid from the pressure regulator reservoir to the wheel cylinder by discharging to the first brake fluid passage. | 08-29-2013 |
20130234500 | ELECTRIC VEHICLE BRAKE CONTROL DEVICE - A brake control device of an electric vehicle comprises a master cylinder, wheel cylinders, a VDC brake fluid pressure unit, a motor controller and an integrated controller. The motor controller controls a regenerative braking force produced by a vehicle driving electric motor. The integrated controller achieves, upon braking operation, a driver-desired deceleration based on the sum of a base hydraulic pressure part produced by a master cylinder pressure and a regenerative part produced by the regenerative braking force and compensates an insufficient regenerative part with a pressure increased part produced by the VDC brake fluid pressure unit. In addition to this, at the time when the VDC motor is stopped due to the regenerative cooperative brake control, a pressure difference control effected by M/C cut solenoid valves and which are differential pressure regulating valves is carried out based on a motor rotation speed of the VDC motor. | 09-12-2013 |
20130257140 | BRAKE APPARATUS - A controller controls a hydraulic control device to generate a target braking force corresponding to the stroke of a brake pedal by adjusting a controlled hydraulic braking force portion generated by the hydraulic control device on the basis of the relationship with a master hydraulic braking force portion generated from the brake hydraulic pressure in a master cylinder and a regenerative braking force portion generated by a regenerative brake device. The regenerative brake device maximizes the regenerative braking force portion before the stroke of the brake pedal reaches an idle stroke, and thereafter, the hydraulic control device | 10-03-2013 |
20130328386 | Method for operating a regenerative braking system of a vehicle and control unit for a regenerative braking system of a vehicle - A method/controller for operating a vehicle regenerative braking system by operating in a first braking mode, in which a generator braking torque of a generator is not zero and is equal to a first regenerative portion predefined for the first mode, and controlling the system out of the first mode into a second braking mode having a second regenerative portion, which is smaller than the first portion, so that brake fluid is pumped out of a storage volume of the system into at least one wheel brake cylinder and/or at least one brake circuit of the system via at least one brake fluid delivery mechanism; by activating the delivery mechanism via a setpoint delivery output variable, which is established/predefined for a setpoint brake pressure having a setpoint pressure rise which increases over time, so that an actual brake pressure having an actual pressure rise increase over time is built up. | 12-12-2013 |
20140008965 | BRAKE DEVICE FOR VEHICLE - A brake device for a vehicle is provided in which when a slave cylinder generates a brake fluid pressure that is commensurate with the actual amount of operation of a brake pedal by a driver in a state in which a master cut valve is closed and a fluid path connecting a master cylinder to the slave cylinder is cut off, a wheel cylinder is actuated by the brake fluid pressure. Since deterioration determination means determines a leak in the downstream of the slave cylinder based on the actual amount of actuation of the slave cylinder detected by a slave cylinder stroke sensor and the actual brake fluid pressure generated by the slave cylinder and detected by a fluid pressure sensor, it is possible to rapidly determine a leak in the downstream of the slave cylinder. | 01-09-2014 |
20140015309 | PRESSURE TRANSMISSION DEVICE FOR A VEHICLE, POWER-ASSISTED BRAKING SYSTEM AND METHOD - A pressure transmission device for a power-assisted braking system of a vehicle; at its inlet, the pressure transmission device being connectible in a hydraulically operative manner to a master brake cylinder of the power-assisted braking system, and at its outlet, the pressure transmission device being connectible in a hydraulically operative manner to a wheel brake cylinder of the power-assisted braking system; the pressure transmission device including an accumulator and a linkage, which transmits a pressure difference between the inlet and the outlet to the accumulator and stores it in this. | 01-16-2014 |
20140015310 | PARKING BRAKE CONTROL DEVICE - When an abnormality is occurring in a main braking device for service brake, a parking brake control device determines whether the abnormality is a single system failure or a dual system failure and whether to execute an auxiliary lock control that generates a parking brake force by controlling a parking brake device. The parking brake control device then sets, in accordance with a mode of failure determined, a wheel on which the auxiliary lock control is to be executed. | 01-16-2014 |
20140042800 | BRAKE SYSTEM AND METHOD OF CONTROLLING THE SAME - There is provided a brake system for performing regenerative braking and friction braking to brake a rotating body, the brake system including: a manipulation part configured to provide a brake input; a regenerative braking unit configured to perform regenerative braking; a friction braking unit configured to perform friction braking; and a control unit configured to control the brake system, wherein the friction braking unit includes: a friction working part configured to brake a rotating body by friction; a pneumatic line system configured to operate the friction working part; a first valve part connected to the pneumatic line system; and a second valve part connected to the pneumatic line system and connected in parallel to the first valve part. | 02-13-2014 |
20140062176 | Brake Control Apparatus - A brake control apparatus includes a normally-open pressure-buildup control valve disposed between a master cylinder and each wheel-brake cylinder, a reservoir into which the brake fluid in each of the wheel-brake cylinders flows during an anti-brake skid pressure-reduction control mode, and a pressure-reduction control valve disposed between each of the wheel-brake cylinders and the reservoir. Also provided is a fluid-pressure controller configured to bring the pressure-buildup control valve to a non-controlled state and simultaneously bring the pressure-reduction control valve to a controlled state, when flowing and storing the brake fluid, flown out of the master cylinder due to a driver's brake-pedal operation, into the reservoir and when flowing and storing the brake fluid in each of the wheel-brake cylinders into the reservoir, during braking with an electric-regenerative braking system brought to an operative state. | 03-06-2014 |
20140084673 | Brake Control Apparatus - A brake control apparatus includes: a fluid storing section for storing a quantity of brake fluid that is flown out of a master cylinder by driver's braking operation; pressure-increasing control valves each of which is disposed between the master cylinder and a corresponding one of wheel cylinders; a master cylinder pressure reduction control valve disposed in a fluid passage connected between the master cylinder and the fluid storing section. A hydraulic pressure control section is configured to perform a control operation when a braking force is being controlled with a regenerative braking system, wherein the control operation includes: controlling at least one of the pressure-increasing control valves toward closed state; controlling the master cylinder pressure reduction control valve toward open state; and allowing the quantity of brake fluid to flow into the fluid storing section. | 03-27-2014 |
20140110994 | METHOD FOR OPERATING A BRAKING SYSTEM - The invention relates to a method for operating a braking system, including a brake booster, which is divided into at least one vacuum chamber and at least one working chamber by at least one movable partition, wherein at least one vacuum chamber is connected, or can be connected, to a vacuum source for creating a vacuum, and further including at least one sensor, which detects at least one variable such as travel and/or angle and/or force of a brake pedal actuation and/or a brake pressure that is built up in at least one main brake cylinder connected to the brake booster in accordance with a brake pedal actuation. According to the invention, the remaining vacuum in at least one vacuum chamber is estimated on the basis of at least one of the detected variables by considering actuations already performed. The invention further relates to a braking system and to the use thereof. | 04-24-2014 |
20140145498 | MOTION CONTROL SYSTEM OF VEHICLE - Vehicular motion control system comprising controller that independently controls driving force and/or braking force of each of four wheels and a turning direction sensor that senses a turning direction, and with an acceleration/deceleration command generator that generates an acceleration/deceleration command based upon a sensed steering angle and sensed vehicle speed and a driving force/braking force distributor that determines the distribution of driving force or driving torque and/or braking force or braking torque of each wheel, and driving force/braking force distributor determines based upon the acceleration/deceleration command and the turning direction so that more driving force or more driving torque and/or more braking force or more braking torque are/is distributed to the inside front wheel in turning than the outside front wheel in turning and more driving force or more driving torque and/or more braking force or more braking torque are/is distributed to the outside rear wheel. | 05-29-2014 |
20140145499 | VEHICLE BRAKE SYSTEM - A vehicle brake system is provided with a hydraulic brake device, a regenerative brake device incorporating a generator motor, and a brake control device. The control device includes a section for calculating a driver target brake force for each wheel corresponding to a manipulation amount of a braking manipulation member, a section for enabling the brake control device itself to set compensation brake forces for respective wheels, a section for selecting a larger one of the driver target brake force and the compensation brake force for each wheel and for subtracting a base hydraulic brake force from the selected brake force to set differences for respective wheels as compensated target brake forces for the wheels, and a section for controlling the distribution of the compensated target brake force for each wheel to a controlled hydraulic brake force for each wheel and a regenerative brake force for each driving wheel. | 05-29-2014 |
20140152082 | CONTROL DEVICE FOR A VEHICLE BRAKE SYSTEM AND METHOD FOR OPERATING A VEHICLE BRAKE SYSTEM - A control device for a brake system of a vehicle includes a valve control device, using which, while taking into account a provided information signal with respect to a currently exerted or to be exerted generator braking torque of a generator, at least one high-pressure switching valve of a brake circuit of the brake system is able to be controlled into an at least partially opened state such that a brake fluid volume is able to be displaced from a main brake cylinder of the brake system into a storage chamber of the brake circuit via the at least one high-pressure switching valve that has been controlled into the at least partially opened state. Furthermore, a method for operating a brake system of a vehicle is described. | 06-05-2014 |
20140152083 | CONTROLLING DEVICE FOR A BRAKE SYSTEM OF A VEHICLE AND METHOD FOR OPERATING A BRAKE SYSTEM OF A VEHICLE - A controlling device for a brake system, including a generator control device, by which a setpoint generator braking torque may be set regarding an actuating intensity of a manipulation of a brake actuating element; and a valve control device, by which, if the stipulated setpoint generator braking torque is equal to zero, at least one accumulator opening valve of a brake circuit may be forced into a first valve position in such a manner, that displacement of brake fluid from a master brake cylinder into at least one wheel brake caliper of the brake circuit may be effected and displacement of brake fluid from the master brake cylinder into an accumulator of the brake circuit is prevented. If the stipulated setpoint generator braking torque is not equal to zero, the at least one accumulator opening valve may be forced into a second valve position. | 06-05-2014 |
20140167493 | BRAKING SYSTEM WITH SWITCHABLE PUMP PATH - A vehicle braking system includes a master cylinder having first and second outputs. First and second hydraulic braking circuits are provided between the respective master cylinder outputs and respective hydraulic wheel cylinders. A first pump provided in the first hydraulic braking circuit is operable to generate pressure and move hydraulic fluid within the first hydraulic braking circuit. A second pump provided in the second hydraulic braking circuit is operable to generate pressure and move hydraulic fluid within the second hydraulic braking circuit. A valving arrangement establishes fluid communication between the first pump and the second hydraulic braking circuit in a first configuration and prevents fluid communication between the first pump and the second hydraulic braking circuit in a second configuration. | 06-19-2014 |
20140183933 | METHOD OF DECELERATING A VEHICLE WITH REGENERATIVE AND FRICTION BRAKING - A method of decelerating a vehicle equipped with both regenerative powertrain braking from a motor/generator and friction braking from fluid pumped through a brake circuit. A deceleration demand is received, and regenerative braking torque is ramped up in response to the deceleration demand. The brake circuit is pre-charged during the ramping up of regenerative braking torque. Pre-charging the brake circuit includes pumping fluid to at least one wheel cylinder braking device to reduce the required pump speed and resulting noise for any subsequent braking demand on the brake circuit. The pump is actuated to operate at a predetermined speed that maintains noise and vibration below predetermined levels. | 07-03-2014 |
20140203624 | BRAKE SYSTEM - A brake arrangement for a vehicle comprising a braking system arranged to vary hydraulic or pneumatic brake pressure that is arranged to apply a pressure to a brake calliper; an electric motor arranged to generate a braking torque that is applied to a first wheel when the electric motor is placed in a braking mode of operation, wherein the electric motor is arranged to vary brake torque generated when the electric motor is in the braking mode dependent upon a predetermined operating condition of the braking system. | 07-24-2014 |
20140265542 | VEHICLE BRAKING SYSTEM WITH ELECTRIC BRAKE BOOSTER - A braking system for a vehicle is operative to apply a friction brake force to at least one wheel of the vehicle. The braking system includes a master cylinder is in fluid communication with a reservoir of brake fluid and in fluid communication with the hydraulic brake device. According to one aspect, the braking system includes an electric brake force generator which moves the brake fluid within the master cylinder to deliver brake fluid to the friction brake device in response to a first predetermined displacement of a brake pedal. The electric brake force generator includes a housing defining a boost chamber filled with brake fluid and in fluid communication with the reservoir of brake fluid and further includes a drive arrangement for creating pressure in the boost chamber. In accordance with another aspect, the braking system includes a mechanical brake force generator is disposed between a brake pedal and a primary piston of the master cylinder which is operative to actuate the master cylinder in response to a predetermined displacement of the brake pedal. | 09-18-2014 |
20140333123 | CONTROL UNIT FOR A RECUPERATIVE BRAKE SYSTEM OF A VEHICLE AND METHOD FOR BRAKING A VEHICLE - A control device for a recuperative braking system of a vehicle includes: an actuating device configured to (i) select the maximum value of a front axle generator braking torque and of a rear axle generator braking torque, taking into account at least one provided default variable concerning a setpoint total braking torque which is predefined by a driver, (ii) control an electric motor, and (iii) control a hydraulic front axle brake circuit component and a hydraulic rear axle brake circuit component in such a way that a front axle brake pressure and a rear axle brake pressure are settable in such a way that a difference between a predefined setpoint braking torque distribution and an actual braking torque distribution present between the front axle and the rear axle is minimized. | 11-13-2014 |
20140346851 | BRAKE DEVICE - A brake device used in a vehicle employing a regenerative braking device for applying an electric braking force to road wheels, is provided with a first pump for sucking brake fluid from a master cylinder for generating a brake fluid pressure by a brake operation of the driver and for increasing a wheel-cylinder fluid pressure of a front-wheel system so as to generate a braking force, and a second pump for sucking the brake fluid from a reservoir, and for increasing a wheel-cylinder fluid pressure of a rear-wheel system so as to generate a braking force. Also provided is a brake control unit for calculating a distribution amount among the braking forces respectively produced by the first pump, the second pump, and the regenerative braking device in order to generate a required braking force depending on the brake operation by the driver. | 11-27-2014 |
20140361607 | Vehicle Brake System - The invention describes a vehicle brake system having a vehicle brake arrangement ( | 12-11-2014 |
20150028664 | ELECTRONIC BRAKE SYSTEM AND CONTROL METHOD THEREOF - Disclosed are an electronic brake system and a control method thereof. The electronic brake system includes a master cylinder including a piston, an output rod contacting the piston, an input rod configured to be moved forward by a driver's manipulation of a brake pedal and arranged coaxially to the master cylinder and spaced a predetermined isolation gap apart from the output rod, an electrically-driven booster including a motor, a ball screw to move the output rod, and a motion converting unit to move the ball screw forward and backward by converting rotational movement of the motor into linear movement, and an electronic control unit (ECU) to control operation of the motor based on the size of the isolation gap. When the ball screw is moved backward in an ABS mode, the ECU stops backward-movement of the ball screw before the output rod collides with the input rod. | 01-29-2015 |
20150035349 | BRAKE CONTROL DEVICE - A brake control device is provided that can reduce the driver's uncomfortable feeling even when operation amount detection means is broken down. When abnormality determination means | 02-05-2015 |
20150042151 | METHOD FOR CONTROLLING A BRAKE SYSTEM, BRAKE SYSTEM, AND USE - The invention relates to a method, wherein an electrically operated actuator of a vehicle brake system is controlled in accordance with a braking demand of a vehicle control system, such as occurs in electronic stability control. According to the invention, a supply voltage of the vehicle electrical system applied to the electrically operated actuator is increased if at least one specified condition is met. Thus, the pressure build-up by a hydraulic pump can e.g. be accelerated during emergency braking. | 02-12-2015 |
20150048670 | BRAKE DEVICE FOR VEHICLE AND CONTROL METHOD THEREOF - A brake device for a vehicle, that includes at least a first hydraulic brake and a second hydraulic brake which produce hydraulic brake forces, and a regenerative brake which produces a regenerative brake force, and that performs a distribution of the hydraulic brake force and the regenerative brake force with respect to a driver request brake force. | 02-19-2015 |
20150061357 | MASTER CYLINDER AND BRAKE SYSTEM USING THE SAME - A master cylinder including: a primary chamber; a first piston which is provided in the primary chamber, and has one portion that is moved to the outside of the primary chamber by pressing a pedal; a secondary chamber which is provided to be adjacent to the primary chamber; a second piston which is provided in the secondary chamber, and has one portion that protrudes to the outside of the secondary chamber and is provided to be spaced apart from the first piston at a predetermined interval; and a hydraulic line which connects the primary chamber and the secondary chamber, and is connected with a wheel cylinder, in which the first piston is moved by pressing the pedal, and after the first piston is moved at a predetermined interval, the first piston and the second piston come into contact with each other, and are moved together. | 03-05-2015 |
20150061358 | BRAKE DEVICE - A master cylinder | 03-05-2015 |
20150097415 | VEHICLE BRAKE SYSTEM - The object of the present invention is to provide a vehicle brake system capable of appropriately setting an upper limit value of hydraulic pressure of a by-wire brake during stopping of a vehicle in accordance with conditions. When the vehicle is stopped, a maximum allowable drive voltage calculation unit sets a maximum allowable drive voltage to V | 04-09-2015 |
20150097416 | VEHICLE BRAKE SYSTEM - In a brake-by-wire brake system which includes a motor actuated cylinder configured to produce a brake fluid pressure according to an operating stroke thereof and an electric motor for actuating the motor actuated cylinder, the control mode is normally based on a fluid pressure control, but is switched to a stroke control when the brake pedal is released for the purpose of quickly reducing the operating stroke of the motor actuated cylinder to an initial value. To avoid a sudden increase in the noises of the electric motor at the time of switching from the fluid pressure control to the stroke control, a limit circuit limits electric current supplied to the electric motor when the control mode is switched from the fluid pressure control to the stroke control. | 04-09-2015 |
20150115697 | BRAKE DEVICE - A brake device includes an electric brake mechanism that applies electric braking force, a hydraulic brake mechanism that applies hydraulic braking force, an electric brake ECU that directs the electric brake mechanism to generate the electric braking force according to an operation amount of a brake pedal operated by a driver, a master cylinder in which a volume thereof changes according to the operation amount of the brake pedal, and that is able to deliver operating fluid to the hydraulic brake mechanism by a reduction in the volume, and a reservoir that stores the operating fluid. The master cylinder has a discharge port that discharges the operating fluid that is inside of the master cylinder to the reservoir. | 04-30-2015 |
20150115698 | MOTOR VEHICLE - A motor vehicle includes multiple wheels, each having at least one assigned hydraulically actuatable brake; first and second separate hydraulic braking circuits each including multiple valves for modulating a braking pressure in the two separate hydraulic braking circuits, the multiple valves forming a valve assembly; a first control device controlling the multiple valves; third and fourth separate hydraulic braking circuits and a second control device respectively of same construction as the first and second braking circuits and the first control device; a brake booster, operably connectable to the two separate hydraulic braking circuits and the two further separate hydraulic braking circuits; and a valve unit arranged downstream of the brake booster. In response to a malfunction of the first and/or the second braking circuits the valve unit is switchable from a first position in which it connects the valve assembly of the first and second braking circuits to the brake booster, into a second position in which it connects the valve assembly of the third and fourth braking circuits to the brake booster. | 04-30-2015 |
20150115699 | VEHICLE BRAKING DEVICE - The vehicle braking device includes a hydraulic pressure generating device generating a primary hydraulic pressure corresponding to the braking operation by a driver, a motor cylinder device operating to cause the secondary hydraulic pressure generated by operation of the electric motor to track the target hydraulic pressure based on the control operation quantity, a brake pedal sensor detecting the braking operation quantity, a primary hydraulic pressure sensor, an ECU performing switching control in accordance with whether the braking operation quantity detected by the brake pedal sensor reaches a predetermined threshold value, between operating the motor cylinder device on the basis of the braking operation quantity and operating the motor cylinder device on the basis of a correlation value of the braking operation force detected by the motor cylinder device | 04-30-2015 |
20150115700 | Brake System for a Motor Vehicle and Method for Controlling said Brake System - A brake assembly includes a hydraulic auxiliary-power-operated first brake system including a master brake cylinder operably connected to an electromechanical brake booster and a hydraulic wheel brake for at least one wheel, the master brake cylinder configured to be activated by muscle force, and an externally powered second brake system including a hydraulic pressure source operated by external power and operably connected to a hydraulic wheel brake for at least one other wheel. The brake assembly further includes an electric drive motor configured for operation as a generator to brake the motor vehicle by acting on the at least one other wheel and a control unit configured to reduce a braking effect of the first brake system by reducing boosting of the electromechanical brake booster, if a braking effect of the electric drive motor in a generator mode is greater than the determined braking effect of the second brake system. | 04-30-2015 |
20150123456 | BRAKE CONTROL DEVICE AND BRAKE CONTROL METHOD - A brake control device mounted to a vehicle that comprises a pair of driving wheels and a pair of non-driving wheels controls an upstream brake pressure generated by a master cylinder and downstream brake pressures generated by brake actuators so that, during regenerative braking, the downstream brake pressures to brake devices corresponding to the driving wheels are reduced to be lower than the upstream brake pressure, and the downstream brake pressures to brake devices corresponding to the non-driving wheels are increased to be higher than the upstream brake pressure. | 05-07-2015 |
20150123457 | VEHICLE BRAKING CONTROL DEVICE - A vehicle braking control device of the invention includes, when a direction in which a brake operating member is displaced to increase the hydraulic pressure in a master chamber is assumed to be an operating direction, a correlation value output unit that outputs a correlation value that correlates to an amount of decrease in operational reaction force acting on the brake operating member in a direction opposite to the operating direction during a braking operation, prior to start of the switching control; and a control unit that controls the regenerative braking device so that, as the amount of decrease in operational reaction force indicated by the correlation value being output from the correlation value output unit is large, the regenerative braking force at the start of the switching control decreases. | 05-07-2015 |
20150130264 | VEHICLE BRAKE SYSTEM AND PRESSURE REGULATOR INCLUDED THEREIN - A vehicle brake system for braking a vehicle including a braking-mode switching mechanism configured to selectively effectuate, depending upon situations of the vehicle brake system, one of (A) a regulated-pressure-dependent braking mode in which is generated a regulated-pressure-dependent braking force having a magnitude that depends on a regulated pressure of a working fluid and (B) a braking mode depending on an operation force and the regulated pressure in which are generated both of an operation-force-dependent braking force having a magnitude that depends on the operation force by a driver and the regulated-pressure-dependent braking force. | 05-14-2015 |
20150137587 | BRAKE SYSTEM FOR A VEHICLE AND METHOD FOR OPERATING A BRAKE SYSTEM OF A VEHICLE - A vehicle brake system and method for operating same, having a master brake cylinder, a brake medium reservoir, and a first brake circuit, connected via a reservoir line to the brake reservoir, having at least one first wheel brake cylinder, a first wheel inlet valve associated with the first brake cylinder, a first pump, by which a first brake medium volume is pumpable from the reservoir line through the open first wheel inlet valve into the first brake cylinder, a continuously adjustable first wheel outlet valve, by which a first brake medium displacement from the first cylinder into the brake reservoir is controllable, and a connecting line having a spring-loaded non-return valve, via which a delivery side of the first pump is connected to the brake reservoir, a brake medium displacement from the brake reservoir to the delivery side of the first pump being prevented by the spring-loaded non-return valve. | 05-21-2015 |
20150145321 | VEHICLE BRAKE DEVICE - An electronic control device for controlling operations of an electric parking brake and a service brake: determines a release impossible state in which release operation cannot be performed, based on a fact that a motor current that is supplied to an electric motor of the electric parking brake during release control is maintained in a state of a locked rotor current; and performs, when the release impossible state is determined, back-up pressurization for pressing the piston by generating a brake fluid pressure in the wheel cylinder using the service brake and for pressing the friction-applying member against the friction-applied member. | 05-28-2015 |
20150314686 | Brake System for a Land Vehicle and Method for Controlling the Brake System - A hydraulic brake system for a land vehicle includes a brake pedal; a wheel brake; and a master brake cylinder connected to the brake pedal by a brake booster and a pump. The outlet of the pump is connected to the wheel brake by a supply line and the inlet is connected to the wheel brake by a return line. The pump moves hydraulic fluid to the wheel brake. A temporary store is connected to the inlet of the pump and the wheel brake by the return line. A pressure reduction valve, arranged in the return line of the wheel brake, has a throttling effect in the open state. A control unit compensates for the difference between a total braking torque specified by the brake pedal and a generating braking torque provided by an electric machine by setting the hydraulic braking torque during a regenerative braking process of the vehicle. | 11-05-2015 |
20150314763 | Brake System for a Land Vehicle and Method for Controlling a Brake System - A brake system for a land vehicle includes at least one wheel brake; a pump configured to pump hydraulic fluid from the inlet side of the pump to the outlet side of the pump; at least one intermediate store for receiving hydraulic fluid; a hydraulic connection between the intermediate store and the inlet side of the pump; at least one first valve arrangement for blocking a hydraulic connection between the outlet side of the pump and the at least one wheel brake; at least one second valve arrangement for blocking a hydraulic connection between the at least one wheel brake and the inlet side of the pump; and at least one third valve arrangement for blocking a hydraulic connection between the outlet side of the pump and the intermediate store. A method for controlling a brake system is disclosed wherein the braking pressure in at least one wheel brake is reduced by pumping the hydraulic fluid from the at least one wheel brake into the intermediate store, and the second and third valve arrangement are in a conducting position. | 11-05-2015 |
20150343905 | Electrohydraulic Motor Vehicle Brake System and Method for Operating the Same - The invention relates to a technique for operating a regenerative electrohydraulic motor vehicle brake system comprising a master cylinder that can be supplied with a hydraulic fluid from a reservoir, an electromechanical actuator for actuating a piston accommodated in the master cylinder and a stop valve provided between the master cylinder and the reservoir. According to an aspect of this technique, the method comprises the step of controlling the electromechanical actuator when the stop valve is closed to generate a hydraulic pressure on a wheel brake that is fluidically connected to the master cylinder. The method further comprises the step of activating a regenerative brake operation and of controlling the stop valve to open, the master cylinder remaining fluidically connected to the wheel brake and the electromechanical actuator being controlled to maintain the hydraulic pressure on the wheel brake at least to some extent. | 12-03-2015 |
20150353064 | METHOD AND DEVICE FOR OPERATING A BRAKING SYSTEM - A method for operating a braking system, having a front and rear axle, the braking system including: a brake booster having a brake input element, coupled to an actuating travel sensor for providing a signal of a braking input; a brake master cylinder coupled to the brake booster coupled to a brake medium reservoir; fluid lines, in fluidic communication with the brake master cylinder and the brake medium reservoir, and with braking devices of the wheels via a system of valves, each of the wheels being coupled to a generator generating a braking torque, the method including: generating a hydraulic free travel with the valves and controlling valves with a control unit, a hydraulic pressure build-up for decelerating a wheel speed being prevented by generating free travel during actuation of the brake input element; and generating a regenerative braking torque for decelerating the wheel speed, based on the braking input. | 12-10-2015 |
20150375726 | METHOD FOR OPERATING A BRAKE SYSTEM, BRAKE SYSTEM IN WHICH THE METHOD IS PERFORMED, AND USES OF THE BRAKE SYSTEM - A method for operating a motor vehicle brake system, the brake system including an electrically controllable pressure-providing device, including a cylinder/piston assembly having a hydraulic pressure chamber and a piston that can be moved by an electromechanical actuator, a number of hydraulic wheel brakes associated with two axles of the vehicle can be supplied with braking pressure via the hydraulic pressure chamber, and a sensor for detecting the driver braking request. An electric drive having at least one electrical machine, which can also be operated as a generator, is associated with at least one axle of the vehicle, and, during regeneration braking, in which a generator deceleration is built up by the electric drive, the cylinder-piston assembly is controlled such that the pressure in the hydraulic pressure chamber is adjusted in accordance with the difference between the requested braking deceleration and the generator deceleration built up by the electric drive. | 12-31-2015 |
20160023644 | Brake System for Motor Vehicles - A brake system for motor vehicles, having a brake master cylinder actuated by a brake pedal with at least one first pressure chamber. The brake master cylinder communicating with wheel brakes; and a hydraulic fluid storage container. A pressure balancing connection connects to the fluid storage container. A first electrically controllable pressure supply device communicating with the wheel brakes. A pressure regulating valve arrangement for regulated wheel brake pressure. A first electronic control and regulating unit actuated the first pressure supply device and the pressure regulating valve arrangement. A second electrically controllable pressure supply device connected to the brake master cylinder and having a pressure outlet connection paired with a second electronic control and regulating unit. The first and the second pressure supply device generate braking pressures independently of each other, and the pressure outlet connection is connected to the pressure balancing connection. | 01-28-2016 |
20160031326 | VEHICULAR BRAKE SYSTEM - The present invention addresses the problem of providing a vehicular brake system that uses both friction braking force generated by an electrical braking unit and regenerative braking force generated by a regenerative braking unit, and can reduce a shortage in braking force when a slip has occurred on a wheel and antilock control is activated. The vehicular brake system includes: an electrical braking unit that supplies operational pressure generated in operational fluid by an electrical brake actuator to wheel cylinders and thereby applies friction braking force to wheels; a regenerative braking unit for applying regenerative braking force generated by an electrical motor to a driving wheel; and an antilock control unit for activating antilock control that increases and decreases the friction braking force to stop slip of a wheel. | 02-04-2016 |
20160031327 | MOTOR VEHICLE HAVING A HYBRID DRIVE - Motor vehicle having a hybrid drive which includes at least one wheel which can be driven by an electric machine, wherein a recuperation device is provided which permits recuperation of energy in a recuperation phase during a braking process, wherein a brake system is provided with a pedal, at least one master brake cylinder and at least one wheel brake which fluidically activates the wheel brake on the basis of a movement of the pedal by a brake pressure, wherein a pressure-reducing valve device is provided which reduces the brake pressure in the recuperation phase, and wherein a compensator is provided for compensating a hydraulic effect of the pressure-reducing valve device, wherein in the effective range of the pressure-reducing valve device two master brake cylinders are provided whose pistons are rigidly coupled to one another via a connecting element. | 02-04-2016 |
20160059706 | CONTROL DEVICE FOR A HYDRAULIC BRAKING SYSTEM OF A VEHICLE, HYDRAULIC BRAKING SYSTEM FOR A VEHICLE, AND METHOD FOR OPERATING A HYDRAULIC BRAKING SYSTEM OF A VEHICLE - A control device is provided for a hydraulic braking system of a vehicle, including an actuating device which is designed for outputting, at least temporarily, at least one first control signal and at least one second control signal in at least a first operating mode, taking into account at least one sensor signal. A known hydraulic braking system may be controlled with the aid of the control signals, output by the actuating device, in such a way that during an activation of a brake actuating element, at least one blending valve of a first brake circuit which is connected to the master brake cylinder via a first changeover valve is controlled into an at least partially open state in such a way that brake fluid is displaceable into at least one storage chamber, and at least one first brake pressure which is present in at least one first wheel brake cylinder of the first brake circuit is limitable, and a pressure relief valve of a second brake circuit, which is connected to the master brake cylinder via a second changeover valve, is controlled into an at least partially open state in such a way that brake fluid is displaceable into a brake fluid reservoir, and at least the first brake pressure is additionally reducible. Moreover, a hydraulic braking system is provided which includes the control device, and a method is provided for operating a hydraulic braking system. | 03-03-2016 |
20160059835 | Hydraulic Assembly For A Vehicle Brake System - A hydraulic assembly for a vehicle brake system comprising at least two brake circuits and wheel brakes associated with the brake circuits. The hydraulic assembly comprises a pressure generator for generating a central hydraulic pressure for the brake circuits independently of the driver at least in the case of service braking initiated by the driver. Furthermore, at least one pressure adjusting device is provided for adjusting for each individual brake circuit the central hydraulic pressure that is generated by the pressure generator independently of the driver. | 03-03-2016 |
20160114769 | PEDAL SIMULATOR - A pedal simulator of the present invention is disclosed. According to an aspect of the present invention, the pedal simulator, which is connected with a master cylinder and receives pedal pressure of the driver and configured to provide a sense of a pedal for a driver, includes: a simulation chamber having one end connected with the master cylinder and the other end provided in the simulator block closed by a damping housing, and configured to store oil; a check valve pressurized by the piston, provided in the simulation chamber to be slideable, and slid; an orifice formed in the simulator block and allowing a flow of oil in the simulation chamber by the sliding check valve; and an accumulator configured to store the oil discharged through the orifice. | 04-28-2016 |
20160159224 | VEHICLE BRAKE SYSTEM - A control device, when performing a reallocation control, makes the decrease gradient of regeneration braking force in a first period in which the amount of decrease in a basal fluid pressure from a reference basal fluid pressure is less than a specified amount of decrease greater than the decrease gradient of the regeneration braking force in a second period in which the amount of decrease in the basal fluid pressure is not less than the specified amount of decrease. | 06-09-2016 |
20160200199 | VEHICLE | 07-14-2016 |
20160200200 | VEHICLE | 07-14-2016 |
20160200296 | INTEGRATED SYSTEM FOR A POWERED HANDBRAKE ON A LOCOMOTIVE | 07-14-2016 |
20170232945 | BRAKE SYSTEM | 08-17-2017 |
20220135010 | PRESSURE SUPPLY DEVICE WITH DOUBLE STROKE PISTON FOR A BRAKE SYSTEM - A brake system for a vehicle has at least one pressure supply device which is connected to a brake circuit via a hydraulic line. Furthermore, the brake system has a hydraulic connection between at least one of the brake circuits and an accumulator container, said connection being switchable via at least one outlet switch valve, and the pressure supply device has a double stroke piston with a working stroke and a return stroke. The double stroke piston can be at least partly emptied via the outlet switch valve. | 05-05-2022 |