Class / Patent application number | Description | Number of patent applications / Date published |
701080000 | Having coefficient of friction or road condition determining means | 20 |
20080208427 | Vehicle braking-force control device - A braking-force control device has a brake control function for performing brake control on a front outside wheel when a vehicle is detected to be in an oversteer condition during a turning operation and for performing brake control on a rear inside wheel when the vehicle is detected to be in an understeer condition during a turning operation. For preventing the oversteer condition, a command for reducing the engine torque is output. On the other hand, for preventing the understeer condition, the engine torque is limited in accordance with a permissible engine torque value that is calculated on the basis of a road-surface friction coefficient, and ground loads and lateral tire forces of individual wheels. If it is detected that engine braking is in operation, the engine torque is adjusted to substantially zero. | 08-28-2008 |
20080221769 | Vehicle Driving Assist System - An driving assist control unit controls actuators such as a front wheel steering device, an accelerator pedal mechanism, an alarm lamp. The control units estimates permissible tire-force being capable of acting on the vehicle tire on the basis of road-surface friction coefficient and ground load of the tire, and then calculates tire-force margin by subtracting current tire-force currently acting on the tire, such as total driving force and lateral force, from the permissible tire-force. The control unit then controls steering reaction force of the front wheel steering device, reaction force of the accelerator pedal, and flashing frequency of the alarm lamp in accordance with the magnitude of the tire-force margin, respectively. | 09-11-2008 |
20080221770 | Vehicle control device - A main controller calculates permissible driving forces of individual wheels from a road-surface friction coefficient, ground loads of the individual wheels, and lateral forces of the individual wheels. The main controller then calculates a permissible engine torque on the basis of the calculated permissible driving forces so as to limit engine output. In addition, based on the calculated permissible driving forces, the main controller calculates a transfer-clutch torque for front-rear driving-force distribution control, a rear-wheel torque shift amount for left-right driving-force distribution control, and a steering-angle correction amount for steering-angle control. | 09-11-2008 |
20080319626 | Road-Surface Condition Estimating Device - A front-wheel speed is calculated as a wheel speed of driving wheels, a rear-wheel speed is calculated as a wheel speed of driven wheels, a rear-wheel acceleration is calculated as a wheel acceleration of the driven wheels, a front-wheel-speed difference value is calculated as a driving-wheel-speed difference value, a rear-wheel-speed difference value is calculated as a driven-wheel-speed difference value, a rear-wheel-acceleration difference value is calculated as a driven-wheel-acceleration difference value, and a front-wheel ground load is calculated as a ground load acting on the driving wheels. Based on these calculated values, a gradient of a tire-characteristic curve indicating an amount of change in road-surface friction coefficient with respect to an amount of change in slip rate is calculated, and the calculated gradient of the tire-characteristic curve is compared with preset threshold values, whereby a road-surface friction coefficient as a road-surface condition can be determined. | 12-25-2008 |
20090105921 | ROAD SURFACE CONDITION ESTIMATING METHOD, ROAD SURFACE CONDITION ESTIMATING TIRE, ROAD SURFACE CONDITION ESTIMATING APPARATUS, AND VEHICLE CONTROL APPARATUS - The vibration of a tire | 04-23-2009 |
20090150036 | GPS-based traction control system and method using data transmitted between vehicles - System and method for controlling vehicle operating characteristics. The method includes receiving, at a vehicle, global positioning system (GPS) data, and, based on the received GPS data, determining the vehicle's location. The method also receives data from another vehicle. The method then modifies one or more vehicle operating characteristics based on the determined location and on data received from another vehicle, the characteristics including a suspension dampening characteristic, a spring rate characteristic, ABS braking characteristics, stability control system characteristics, a seat shock absorber characteristic, etc. | 06-11-2009 |
20100030444 | Device For Determining A Driving State and Method For The Driving-State-Dependent Operation Of A Combined Vehicle Brake System - A device for determining a driving state of a two-axle motor vehicle, which driving state is formed from the driving situation of the motor vehicle and the state of the underlying surface, wherein output signals from vehicle on-board sensors are evaluated in order to determine the driving situation and wherein a routine for determining and/or estimating the friction value of the underlying surface is provided in order to determine the state of the underlying surface. Also disclosed is a method for operating a combined vehicle brake system, in particular for motor vehicles, having hydraulically actuable wheel brakes at a front axle and having electromechanically actuable wheel brakes at a rear axle, wherein the vehicle wheels assigned to the rear axle can be driven at least at times by an electric motor which can be operated as a generator for the recuperation of braking energy | 02-04-2010 |
20100235065 | METHOD FOR OPERATING A VEHICLE BRAKE SYSTEM - A method that compensates for temperature-related effects in a vehicle brake system. According to one embodiment, the method determines the temperature of a brake pad, calculates a temperature-based modifier, and then uses the temperature-based modifier to adjust one or more brake command signals provided to the vehicle brake system so that they are compensated for temperature-related changes in the coefficient of friction (μ) of the brake pad and rotor. The method may be used with brake-by-wire systems such as electrohydraulic braking (EHB) systems and electromechanical braking (EMB) systems. | 09-16-2010 |
20110066347 | SELF MONITORING BRAKING SYSTEM FOR VEHICLES - A self monitoring vehicle braking system includes multiple sensors that gather data associated with the braking system. The data includes wheel speed, road inclination, moisture associated with a surface of the braking system, and audio associated with the road. A processor receives the data from the sensors and processes the data to determine whether a condition of the braking system falls within defined limits and provides to the driver of the vehicle an indication of the braking system condition. | 03-17-2011 |
20110118949 | VEHICLE BRAKE FLUID PRESSURE CONTROL APPARATUS - A vehicle brake fluid pressure control apparatus includes: a controller configured to control fluid pressures in wheel brakes to increase or reduce by controlling normally open electromagnetic valves and normally closed electromagnetic valves, wherein the controller perform: a pressure reducing in a pressure reducing cycle in which a basic pressure reducing control and a gradual pressure control are performed continuously in a case that the controller determines to execute a pressure reducing control with wheel speeds decreasing; a pressure reducing control in a basic pressure reducing amount in the basic pressure reducing control; and a temporary holding control for holding the fluid pressure and a fine pressure reducing control for executing a pressure reducing in an amount smaller than the basic pressure reducing amount in a case that the wheel speeds tend to decrease after the temporary holding control in the gradual pressure reducing control. | 05-19-2011 |
20120123656 | Method and device of calculating aircraft braking friction and other relating landing performance parameters based on the data received from aircraft's on board flight data management system - This invention relates to a method and apparatus for the calculation of aircraft braking friction and other relating landing parameters, including but not limited to aircraft braking action, aircraft takeoff distance, aircraft landing distance, runway surface conditions and runway surface friction based on the data collected by and available in the aircraft Flight Data Recorder (FDR) or other flight data management system, for example, the Quick Access Recorder (QAR), to provide all involved personnel in the ground operations of an airport and airline operations, including but not limited to aircraft pilots, airline operation officers and airline managers as well as airport operators, managers and maintenance crews, with the most accurate and most recent information on the true aircraft landing performance parameters to help better and more accurate safety and economical decision making. | 05-17-2012 |
20120179348 | METHOD FOR DETERMINING THE VEHICLE LONGITUDINAL VELOCITY IN A VEHICLE - In a method for determining the vehicle longitudinal velocity in a vehicle, a wheel longitudinal force is determined in an estimation equation as a function of the wheel speeds and the vehicle longitudinal velocity is ascertained as a function of the wheel longitudinal force. | 07-12-2012 |
20130226430 | Method and device of calculating aircraft braking friction and other relating landing performance parameters based on the data received from aircraft's on board flight data management system - This invention relates to a computer network for calculating and distributing the true braking coefficient of aircraft on runways and taxiways using, in part, the aircraft itself, by utilizing dynamic aircraft properties recorded on and obtained from the aircraft's flight data management system. Environmental and aircraft parameters may also be used to calculate the braking friction coefficient. A computer and network are used to obtain data and to calculate the friction coefficient, and may be used to distribute the result. The network may utilize, at least in part, wireless local area networks to facilitate data transfer and distribution of the result. The computer for calculating the braking coefficient may be located on the aircraft. | 08-29-2013 |
20130253795 | BRAKING SYSTEM AND A METHOD FOR BRAKING A VEHICLE IN THE CASE OF ABRUPT CHANGES IN THE FRICTION COEFFICIENT - A brake device is described for braking the wheels of a vehicle. The brake device includes at least one brake master cylinder, a brake booster, a wheel brake, a return pump, using which a hydraulic fluid may be pumped back from the wheel brake in the direction of brake master cylinder. A sensor system for detecting an abrupt negative change in the friction coefficient of the roadway is provided. An arrangement is provided according to which the boost of the brake booster is set to a smaller value if a braking maneuver has been detected on a roadway having an abrupt negative change in the friction coefficient than in the case of a braking maneuver on a roadway without an abrupt negative change in the friction coefficient. | 09-26-2013 |
20140207356 | Method and device for communicating true runway braking performance using data from the flight data management systems of landed aircraft - This invention relates to a computer network for calculating and distributing the true braking coefficient of aircraft on runways and taxiways using a computer which obtains data from an aircraft, including in some preferable embodiments dynamic aircraft properties recorded on the aircraft's flight data management system. Environmental and aircraft parameters may also be used to calculate the braking friction coefficient. A computer and network are used to obtain data and to calculate the friction coefficient, and may be used to distribute the result. The network may utilize, at least in part, wireless local area networks to facilitate data transfer and distribution of the result. The computer for calculating the braking coefficient may be located on the aircraft. | 07-24-2014 |
20140358396 | Computer network for calculating aircraft cornering friction based on data received from an aircraft's on board flight data management system - This invention relates to a computer network for calculating the true aircraft cornering friction coefficient of an aircraft runway or taxiway using the data collected by and available in the aircraft Flight Data Recorder (FDR) or other flight data management system, for example, the Quick Access Recorder (QAR). The invention may optionally distribute to personnel in the ground operations of an airport and airline operations, including but not limited to aircraft pilots, airline operation officers and airline managers as well as airport operators, managers and maintenance crews, the most accurate and most recent information concerning the true aircraft cornering friction coefficient to aid in making better and more accurate safety and economical decisions. | 12-04-2014 |
20150039200 | Method and device for communicating true runway braking performance using data from the flight data management systems of landed aircraft - A computer network for calculating a value for the true braking coefficient of friction for an aircraft runway or taxiway using data from one or more aircraft's flight data recorders or flight data management systems, and reporting the calculated value information to individuals and agencies including air traffic control, airport operations and maintenance, and aircraft pilots and ground crews is described and claimed herein. The data may be obtained in real-time by either an onboard or an off-aircraft high-power computing system, calculating the aircraft's true braking coefficient of friction, and reporting the calculated information to the individuals and agencies. | 02-05-2015 |
20160046268 | SYSTEM AND METHOD FOR CONTROLLING BRAKING PRESSURES AT WHEELS ON A VEHICLE - A controller controls respective braking pressures at wheels on a vehicle. The controller includes a processor electrically communicating with each of a plurality of switching valves, which controls braking pressures at respective wheels. The processor, during a braking event having a brake demand above a braking demand threshold, controls each of the switching valves to maintain braking pressures at the respective wheels based on at least one additional criteria. | 02-18-2016 |
20160090922 | VEHICLE CONTROL UNIT - The embodiment provides a vehicle control unit including a torque increment setting module related to a drive source brake torque control and an anti-lock braking control module related to an anti-lock braking control. The torque increment setting modules includes a first setting module and a second setting module. The first setting module sets the torque increment based on at least a slip amount of a wheel when the drive source brake torque control is in execution but the anti-lock braking control is not executed. The second setting module sets the torque increment based on a parameter other than the slip amount when both the drive source brake torque control and the anti-lock braking control are in execution. | 03-31-2016 |
20160193989 | VEHICLE BRAKE CONTROL DEVICE | 07-07-2016 |