| VOLVO CONSTRUCTION EQUIPMENT AB Patent applications |
| Patent application number | Title | Published |
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| 20120133157 | DOOR LOCKING ARRANGEMENT AND WORK MACHINE COMPRISING A DOOR LOCKING ARRANGEMENT - A door locking arrangement is provided for a door of a work machine for holding the door in an open position, wherein the door is pivotably connected to a cab wall. The door locking arrangement includes a first holding element and a second holding element forming a releasable connection for holding the door in its open position, wherein one of the two holding elements is arranged at an outside of the door facing the cab wall when the door is in its open position and the other holding element is arranged at the cab wall. An electric actuator is provided for releasing the releasable connection by separating the first holding element from the second holding element when the door is to be moved from its open position to its closed position. | 05-31-2012 |
| 20120109459 | HYDRAULIC STEERING SYSTEM COMPRISING A FIRST AND A SECOND STEERING MEMBER AND VEHICLE COMPRISING A HYDRAULIC STEERING SYSTEM - A hydraulic steering system for a vehicle includes a first steering member and a second steering member, wherein the first steering member is operationally connected to a first steering valve unit including a first steering valve, and wherein a priority valve controls a flow of a hydraulic fluid to one or more steering cylinders which provide for steering of the vehicle in a desired steering direction, wherein the priority valve gives priority to steering with the first steering member over the steeling with the second steering member. A second steering valve is provided functionally operable in series with a proportional flow control valve, wherein the second steering valve and/or the proportional flow control valve are controlled at least by the second steering member. | 05-03-2012 |
| 20120100956 | WORKING MACHINE AND A METHOD FOR OPERATING A WORKING MACHINE - A working machine includes a prime mover for supplying torque to the driving wheels of the working machine, and a transmission line arranged between the prime mover and the driving wheels for transmitting torque from the prime mover to the driving wheels. The transmission line includes a gearbox arranged between the prime mover and the wheels, and the working machine further includes at least one hydraulic machine in a hydraulic system for moving an implement arranged on the working machine and/or steering the working machine, and an electric machine for driving or braking the driving wheels and/or for driving or braking the at least one hydraulic machine. The electric machine is arranged in parallel with the prime mover with respect to the transmission line and is mechanically connected to the transmission line between the prime mover and the gearbox. The gearbox is a continuously variable transmission having a variator unit, and the gearbox has an operation mode where the rotation speed of the output shaft of the gearbox is zero or close to zero independently of the rotation speed of the input shaft of the gearbox at the same time as torque can be transmitted from the input shaft to the output shaft. | 04-26-2012 |
| 20120067432 | HYDRAULIC SYSTEM AND A WORKING MACHINE COMPRISING SUCH A HYDRAULIC SYSTEM - A hydraulic system for a working machine includes at least one work function and a control valve unit for controlling hydraulic fluid to and from the work function, and a recovery unit connected to a return port of the control valve unit for recovering energy from the work function. The system further includes an arrangement for limiting the pressure of the hydraulic fluid at the return port, which pressure limiting arrangement has a pilot-operated valve adapted to set a maximum allowable pressure at the return port of the control valve unit. The pressure is variable by controlling the pilot-operated valve by a control unit. | 03-22-2012 |
| 20120065840 | VEHICLE AND METHOD FOR OPERATING A VEHICLE - A vehicle includes at least one of (i) an undercarriage and an upper carriage arranged rotatably about a vertical axis with respect to the undercarriage and (ii) a leverage means arranged pivotably about a horizontal axis with respect to the upper carriage, wherein a sensor system is provided for monitoring at least one stability criterion with respect of a tilt movement of the vehicle, and wherein a control unit is coupled to the sensor system for automatically initiating an action and/or performing an action for stabilizing the vehicle depending on the at least one stability criterion. The risk of an unexpected tilting of the vehicle can be reduced | 03-15-2012 |
| 20110314802 | SWING SYSTEM AND CONSTRUCTION MACHINERY OR VEHICLE COMPRISING A SWING SYSTEM - A swing system for construction machinery or a vehicle, particularly an excavator or a crane, includes a swing brake for blocking or unblocking a rotational movement of a first portion of the vehicle relative to a chassis portion of the vehicle, and a swing pump and a swing motor are provided for performing the rotational movement. The swing pump can be positioned in a neutral position where no rotational movement of the first portion takes place. At least one brake control actuator is provided for automatically engaging the brake when the swing pump is in its neutral position. The swing system can provide an improved control of the swing movement on a slope and an improved comfort during operation of the swing movement. | 12-29-2011 |
| 20110300992 | METHOD FOR OPERATING A BRAKE SYSTEM OF A WORK MACHINE AND BRAKE SYSTEM FOR A WORK MACHINE - A method for operating a brake system for a work machine that includes at least one operating brake acting directly or indirectly on at least one ground engagement element of the work machine and at least one operating brake actuator which is movable between a fully engaged position and a fully released position and an accelerator actuator for activating propulsion of the work machine. In an activated state of the brake system the operating brake actuator is moved automatically to its fully engaged position when the accelerator actuator is released. | 12-08-2011 |
| 20110218075 | PEDAL MAP SHIFT - A method is provided for controlling a prime mover adapted to drive at least one ground engaging element of a working machine. The method includes receiving an operator control input indicative of the control of the prime mover and determining at least one operation signal in response to the operator control input, which operation signal is sent for controlling the prime mover. The method also includes receiving a operating state input indicative of an operating state of the machine and selecting a control mode from at least one speed control mode in which the determined operational signal comprises a desired speed of the prime mover and at least one torque control mode in which the determined operational signal comprises a desired torque of the prime mover in response to the operating state input. | 09-08-2011 |
| 20110182665 | CONVEYOR ASSEMBLY FOR AN ASPHALT PAVING MACHINE - Conveyor assemblies for an asphalt paving machine and an asphalt paving machine. The conveyor assembly may include a first conveyor, a second conveyor generally parallel to the first conveyor, a central space being defined between the first conveyor and the second conveyor, and a cover assembly. The cover assembly may include a cover member positioned over the central space and covering the conveyor inner chains, the cover member having an upper surface substantially parallel to the conveyor surfaces, the cover member substantially preventing material from entering the central space between the first conveyor and the second conveyor, and a divider member connected to the cover member and extending generally perpendicular to the upper surface. The conveyor assembly may include scraper members operable to move material on the upper surface of the cover during movement of the conveyor chains. | 07-28-2011 |
| 20110131967 | BRAKE SYSTEM AND VEHICLE COMPRISING A BRAKE SYSTEM - A vehicle and a brake system for a vehicle include at least one hydraulic pump, wherein the at least one hydraulic pump is connected to an input fluid conduit and an output fluid conduit. A flow resistance unit is provided in the output fluid conduit of the at least one hydraulic pump for being selectively coupled into the output fluid conduit when brake torque is requested. | 06-09-2011 |
| 20110093229 | METHOD FOR CALIBRATING SENSORS - A method for calibrating sensors in a system including a plurality of sensors which are arranged so that they can be subjected to the same load includes the steps of detecting the level of an operating parameter for a certain load level individually by at least two of the sensors, calculating a mean value of the operating parameter for the sensors for the load level, determining a deviation from the mean value for each of the sensors, and saving the value of the deviations for use in operation of the system. | 04-21-2011 |
| 20110087407 | METHOD FOR CONTROLLING A POWER SOURCE - A method, an electronic control unit, a vehicle control system and a working machine for controlling an power source adapted to drive at least one ground engaging element of the working machine are provided. The method includes receiving an operator control input indicative of the control of the power source, receiving a state input indicative of an operating state of the machine, determining an operation signal in the response to the operator control input and the operating state input, and sending the determined operation signal for controlling the power source accordingly. An accelerator signal converter adapted to perform any of the method steps is provided, as is an Electronic Control Unit (ECU) including the accelerator signal converter, a vehicle control system including the ECU, and a working machine including the vehicle control system. | 04-14-2011 |
| 20110067944 | STRAIGHT MOTION ASSISTING DEVICE FOR A WORK MACHINE - A straight motion assisting device for a work machine is adapted for receiving an input indicative of a steering angle from a position of a moveable member and adapted for applying a restoring force for affecting the work machine towards a straight motion when the steering angle input indicates that the work machine deviates from the straight motion. The device includes a hydraulic system adapted to be effected by the displacement of the moveable member and adapted to apply the restoring force. | 03-24-2011 |
| 20110066336 | A METHOD FOR OPERATING A TRANSPORT VEHICLE, A TRANSPORT VEHICLE, A METHOD FOR CONTROLLLING OPERATION OF A WORK SITE AND A WORK SITE SYSTEM - A method is provided for operating a transport vehicle provided with a container with due regard to a weight of a received material in the container. The method includes receiving information associated to the weight of the received material in the container from an external source, and in response to the weight information controlling operation of the vehicle. | 03-17-2011 |
| 20110060508 | A METHOD FOR CONTROLLING A HYDRAULIC SYSTEM - The present invention relates to a hydraulic system control unit, a hydraulic system and a working machine for controlling a hydraulic system adapted to perform at least one hydraulic work function in a working machine. The hydraulic system performs the hydraulic control function in accordance with an operation signal determined by a hydraulic system control unit. In a first step ( | 03-10-2011 |
| 20110060504 | METHOD AND A SYSTEM FOR OPERATING A WORKING MACHINE - A method and a system for operating a working machine provided with a hydraulic system and an operator control adapted to command actuation of the hydraulic system is provided. The system includes a first control unit and a second control unit for moving an implement on the working machine and/or for steering the working machine. The method includes receiving first information regarding a status of the operator control, and determining at least one hydraulic system control information based on the first information and sending the determined hydraulic system control information to a second control unit which is adapted to control the hydraulic system accordingly. | 03-10-2011 |
| 20110024204 | CONSTRUCTION VEHICLE WITH A SPLIT HYDRAULIC HOLDING UNIT - A construction vehicle includes a wheeled chassis supporting at least one article of work equipment, hydraulically actuated, a hydraulic power unit driving the work equipment including a hydraulic pump connected to an hydraulic liquid holding unit and to a hydraulic control unit distributing hydraulic power the work equipment, a driver's compartment including a driver's floor, wherein the hydraulic liquid holding unit includes a main hydraulic reservoir which is disposed on the chassis at a level lower than the driver's floor level, and at least one auxiliary hydraulic reservoir which is disposed on the chassis at a level above the driver's floor level. | 02-03-2011 |
| 20110010055 | CONTROL SYSTEM AND WORKING MACHINE COMPRISING THE CONTROL SYSTEM - A control system for a working machine includes a device for changing direction of the working machine, an operator controlled lever, and an electronic control unit adapted to receive an input signal indicative of desired direction from the position of the operator controlled element and to generate an output signal for producing a change of direction of the working machine, corresponding to the position of the operator controlled element, via said device. The control system includes an electronic safety device adapted to be controlled by the position of the operator controlled element and adapted to allow control of the device via the output signal and to block control of the device via the output signal, respectively, depending on the position of the operator controlled element. | 01-13-2011 |
| 20110005873 | BRAKE FOR A WORK MACHINE, A WHEEL HUB UNIT AND A WORK MACHINE - A brake for a work machine includes a brake rotor, a hydraulically operated device for actuating the brake by clamping the brake rotor, and an arrangement for damping jerks resulting from a sudden brake actuation. The brake rotor includes a pair of brake force transmitting discs and the damping arrangement is formed by a damping layer positioned between the discs and secured to each of the discs. | 01-13-2011 |
| 20110005848 | WORK MACHINE - A work machine includes a front section with a front frame, a first set of ground engaging members and a power source for propelling the work machine, a rear section with a rear frame, a second set of ground engaging members and a load-carrying container. The rear section includes an electric drive system adapted for driving at least one ground engaging member of the second set. The rear section is detachably connected to the front section. The power source of the front section is adapted to power the electric drive system in the rear section in an attached state of the front and rear sections. The electric drive system is adapted for driving the at least one ground engaging member of the second set for self-propelling of the rear section in a detached state. | 01-13-2011 |
| 20100332061 | METHOD AND A CONTROL SYSTEM FOR CONTROLLING A WORK MACHINE - A method is provided for controlling a work machine during operation in a repeated work cycle including controlling transfer of power to and from an energy storage arrangement in the work machine according to a predetermined control strategy, which is adapted for the characteristics of the work cycle. | 12-30-2010 |
| 20100327649 | METHOD AND A DEVICE FOR CONTROLLING A VEHICLE COMPRISING A DUMP BODY - A method for controlling a vehicle including a dump body includes automatically monitoring the contents of the dump body during an elevating motion, determining when the dump body has reached a predefined condition during the elevating motion, and controlling the vehicle when it is determined that the dump body has reached the predefined condition. | 12-30-2010 |
| 20100307846 | HYBRID ELECTRICAL WORKING MACHINE - A work machine includes a front section with a front frame and a first set of ground engaging members, a rear section with a rear frame and a second set of ground engaging members, and at least one pivot joint between the front section and the rear section allowing the front section to pivot with regard to the rear section. One of the front section and the rear section includes a power source, and the other of the front section and the rear section includes at least one electric motor adapted for driving at least one of the ground engaging members. | 12-09-2010 |
| 20100292049 | METHOD AND A SYSTEM FOR BRAKING A VEHICLE - A method for braking a vehicle is provided, wherein the vehicle includes a circuit adapted for transmitting a brake signal from an operator controlled braking element to brake devices arranged at a plurality of the vehicle's ground engaging elements via a brake fluid. The method includes detecting a fluid pressure in the circuit, using the detected fluid pressure level as an input for determining a brake power for at least one auxiliary brake in the vehicle, and controlling the auxiliary brake responsively. | 11-18-2010 |
| 20100289297 | COMPARTMENT MOUNTED AT AN UNDERSIDE OF AN UPPER FRAME OF A CONSTRUCTION EQUIPMENT - Construction equipment includes an undercarriage on which an upper frame is mounted, especially in the form of an excavator or crane. At an underside of the upper frame at least one flap and/or at least one compartment is arranged which can be open and closed and which is adapted such that a component of the construction equipment can be operated or is accessible or can be stored when the flap or compartment is open, or such that a compartment is provided for a fuel filler pump, a fuel suction hose, tools, accessories and/or spare parts. | 11-18-2010 |
| 20100263735 | METHOD FOR WHEN NECESSARY AUTOMATICALLY LIMITING A PRESSURE IN A HYDRAULIC SYSTEM DURING OPERATION - A method is provided for, when necessary, automatically limiting a pressure in a hydraulic system during operation. A system is arranged to deliver pressurized hydraulic fluid to at least one fluid actuated device arranged to perform a work function, where the procedure includes sensing a pressure in at least one position of the system, comparing the detected pressure value, or an associated value, with a first predefined pressure limit, and opening a communication of fluid between the fluid actuated device and a reservoir through a first conduit if the sensed pressure value, or an associated value, exceeds the predefined limit. | 10-21-2010 |
| 20100263362 | METHOD FOR CONTROLLING A WORKING MACHINE - A method for controlling a working machine including a hydraulic system for controlling a plurality of work functions, including lift and tilt of an implement, includes the steps of determining a maximum pressure of a hydraulic fluid for performing a certain task with the implement individually for at least one of the work functions, and delivering the hydraulic fluid, pressurized at most to the determined maximum pressure, to the work function. | 10-21-2010 |
| 20100257758 | ARRANGEMENT FOR SUSPENSION OF AN OPERATOR CAB ON A WORK MACHINE FRAME - An arrangement for suspension of an operator cab on a machine frame in order to permit controlled motion of the cab relative to the frame is provided. The arrangement includes at least one first suspension member disposed between an underside of the cab and the frame for supporting the cab on the frame. The arrangement further includes at least one second suspension member disposed between a rear side of the cab and a rigid support structure and wherein the second suspension member is arranged at an elevated position relative to the underside of the cab. The second suspension member is adapted to provide an increased rigidity against cab movements both in the longitudinal and lateral direction of the machine during operation of the work machine. | 10-14-2010 |
| 20100198466 | METHOD FOR PROVIDING AN OPERATOR OF A WORK MACHINE WITH OPERATION INSTRUCTIONS AND A COMPUTER PROGRAM FOR IMPLEMENTING THE METHOD - A method is provided for providing an operator of a work machine with operating instructions when the work machine is used in a repeated work cycle. The method includes automatically instructing the operator of the work machine how to operate the work machine in an optimum way with regard to a specific parameter on the basis of characteristics of the specific work cycle. | 08-05-2010 |
| 20100184005 | METHOD FOR PROVIDING AN OPERATOR OF A VEHICLE WITH OPERATING INFORMATION - A method for providing an operator of a vehicle with operating information includes providing at least one predetermined demonstration of the operating information, deciding if one of the at least one predetermined demonstration is desired to be presented to the operator and, if desired, automatically presenting the demonstration to the operator in an operator compartment of the vehicle when the operator is in an operational position. | 07-22-2010 |
| 20100179735 | A METHOD AND A SYSTEM FOR CONTROLLING AN INPUT POWER - A method for controlling power to at least one power consuming device includes detecting at least one first operational parameter and at least one second operational parameter, establishing a power value based on the detected values of the first and second operational parameters, and controlling the power consuming device in response to the established power value. | 07-15-2010 |
| 20100154399 | METHOD FOR RECUPERATING POTENTIAL ENERGY DURING A LOWERING OPERATION OF A LOAD - method is provided for recuperating potential energy during a lowering operation of a load, wherein a hydraulic system is adapted to lift and lower the load. In the method, at least two energy recuperation modes are provided, one of the modes is selected in response to a current operating state, and the hydraulic system is controlled according to the selected mode | 06-24-2010 |
| 20100131122 | METHOD FOR CONTROLLING A WORK MACHINE DURING OPERATION IN A REPEATED WORK CYCLE - A method is provided for controlling a work machine during operation in a repeated work cycle including the steps of establishing a control strategy on the basis of at least one condition that varies in the course of the work cycle, and controlling at least one device in a work machine power transmission system in response to the established control strategy. | 05-27-2010 |
| 20100094492 | METHOD FOR OPERATING A WORKING MACHINE AND A WORKING MACHINE WITH AN IMPROVED TRANSMISSION LINE - A working machine and a method for operating the same are provided. The working machine is provided with: a power source and a plurality of driving wheels; a working hydraulic system including at least one hydraulic pump powered by the power source for moving an implement on the working machine and/or for steering the working machine; a transmission line arranged between the power source and the driving wheels for transmitting torque from the power source to the driving wheels; and a transmission unit arranged in the transmission line for reducing the mechanical interaction between the power source and the driving wheels. The method includes: detecting at least one operational parameter indicative of a working condition of the working machine; determining if the characteristic of the transmission unit should be altered on the basis of a magnitude of the detected operational parameter; altering the characteristic of the transmission unit if it is determined to be required. | 04-15-2010 |
| 20100089050 | METHOD FOR OPERATING A WORKING MACHINE AND A WORKING MACHINE - A method for operating a working machine provided with a power source providing power and a plurality of power consuming systems connected to the power source includes the steps of providing a model predicting a power demanded by at least one of the power consuming systems, detecting at least one operational parameter indicative of a power demand, using the detected operational parameter in the prediction model, and balancing a provided power to the demanded power according to the prediction model. | 04-15-2010 |
| 20100083650 | HYDRAULIC CIRCUIT FOR OPERATING A TOOL - A hydraulic circuit for operating a tool is provided that is particularly useful in construction equipment such as an excavator, crane, wheel loader, drilling machine, or others. Furthermore, a control unit and a method for controlling the hydraulic circuit and construction equipment including such a hydraulic circuit is disclosed. | 04-08-2010 |
| 20100042281 | METHOD AND A SYSTEM FOR PROVIDING FEEDBACK TO A VEHICLE OPERATOR - A method for providing feedback to a vehicle operator regarding an operational state of a vehicle power transmission system in operation includes the steps of detecting at least one operational parameter indicative of said operational state, and providing an audio feedback signal to the operator in response to a magnitude of the detected operational parameter. | 02-18-2010 |
| 20090287373 | CONTROL SYSTEM FOR A WORK MACHINE AND METHOD FOR CONTROLLING A HYDRAULIC CYLINDER - A control system for a work machine is provided, which system includes an electric machine, a hydraulic machine and at least one hydraulic cylinder. The electric machine is connected in a driving manner to the hydraulic machine. The hydraulic machine is connected to a piston side of the hydraulic cylinder via a first line and a piston-rod side of the hydraulic cylinder via a second line. The hydraulic machine is adapted to be driven by the electric machine and supply the hydraulic cylinder with pressurized hydraulic fluid from a tank in a first operating state and to be driven by a hydraulic fluid flow from the hydraulic cylinder and drive the electric machine in a second operating state. | 11-19-2009 |
| 20090245937 | Break-away material retainer for paving vehicles - A material anti-segregation device is for a paving vehicle including a tractor, a screed for forming a mat of paving material on a base surface, and an auger. The anti-segregation device includes a plurality of flexible, elongated barrier members each coupled with the tractor and collectively defining a curtain. The curtain is configured to generally retain paving material between the curtain and the screed. A plurality of couplers are each configured to connect at least a portion of a separate one of the barrier members with the tractor. Each coupler alternatively disconnects the barrier member or portion from the tractor when tension in the connected member exceeds a predetermined value so as to prevent damage to the tractor. As each barrier member is connected with either a portion or component of the tractor, the predetermined tension value is less than a failure limit of the tractor portion or component. | 10-01-2009 |
| 20090222176 | LOADER - A loader including a vehicle including a structural frame and an elongate boom arm is provided. The boom arm is pivotally mounted at its first end to the frame and has at its second end an assembly for receiving a tool. The loader includes actuators to actuate the boom arm and its associated assembly. The loader also includes a control unit provided with user operable controls for controlling position and orientation of the boom arm and its associated assembly. The actuators integrally incorporate therein magnetic sensors operable to sense longitudinal extension of the actuators and thereby generate actuator feedback signals indicative of the longitudinal extension. The control unit processes the actuator feedback signals in a feedback control to render the position and orientation of the boom arm and its associated assembly adjustable using the user operable controls. Sensing a rotation rate of vehicle engine providing power to the actuators is employed to modify the feedback control to improve operating stability of the loader. | 09-03-2009 |
| 20090101458 | WHEEL BRAKE FOR A VEHICLE AND A VEHICLE COMPRISING THE WHEEL BRAKE - A wheel brake for a vehicle including a brake disc unit adapted to brake the rotation of a rotation element, which is adapted to be drivingly connected to the wheel . The brake disc unit includes a first set of discs and a second set of discs arranged in an alternating manner in an axial direction. The discs in the first disc set are adapted to be rotationally rigidly connected to the rotation element. The brake disc unit includes at least one separator element, which is adapted to keep a sufficient distance between two adjacent discs of one of the disc sets for an intermediate disc from the other disc set to rotate at least substantially freely relative to the spaced discs when the brake disc unit is in a deactivated condition. | 04-23-2009 |
| 20090065990 | FLEXIBLE ELEMENT - Method and arrangement for providing a spring element configured to transmit compression forces and tensile forces between a vehicle frame and a wheel axle that are movably arranged with respect to one another. The spring element includes a rubber body and a mechanical connection member that extends through the rubber body. The mechanical connection member is arranged to limit the distancing movement between the vehicle frame and the wheel axle and has a coupling device for coupling the connection member to at least one of the vehicle frame and the wheel axle. The coupling device also has a first stub with a threaded portion protruding from the spring element and the first stub includes fixing means for obtaining a rotationally fixed, form-fit on said at least one of the vehicle frame and the wheel axle. | 03-12-2009 |
| 20080319618 | Method for Optimizing Operation of a Work Vehicle - A method is provided for optimizing operation of a work vehicle with an engine for propelling the vehicle. The method includes detecting at least one operating parameter, determining an optimized engine speed parameter value with regard to fuel consumption, reduced emissions and/or increased productivity on the basis of the detected operating parameter and stored information regarding fuel consumption, emissions and/or productivity, and controlling the engine in accordance with the determined engine speed parameter value. | 12-25-2008 |
| 20080302099 | Method for Controlling a Hydraulic Cylinder and Control System for a Work Machine - A method is provided for controlling a hydraulic cylinder, including detecting at least one operating parameter, and variably controlling a communication path between the piston-rod side and piston side of the hydraulic cylinder on the basis of the detected operating parameter. | 12-11-2008 |
| 20080295505 | Method for Springing a Movement of an Implement of a Work Machine - A method for springing a movement of an implement of a work machine during a movement of the work machine is provided, in which at least one hydraulic cylinder is connected to the implement for controlling its movements, comprising the steps of connecting a hydraulic machine to the hydraulic cylinder, and of controlling the hydraulic machine in response to a disturbance acting upon the implement during the movement of the work machine. | 12-04-2008 |
| 20080295504 | Method For Controlling a Hydraulic Cylinder in a Work Machine - A method is provided for controlling a hydraulic cylinder in a work machine, which hydraulic cylinder is arranged to move an implement in relation to a part of a vehicle, with the hydraulic cylinder being controlled by a hydraulic machine. The method includes the steps of detecting initiation of a movement of the implement that is such that the piston of the hydraulic cylinder is moved in a first direction, of driving the hydraulic machine in a first rotational direction, prior to the movement of the implement taking place, so that a line from the hydraulic machine is pressurized, which line is arranged to connect the hydraulic machine to the side of the cylinder toward which the piston will be moved during the movement of the implement. | 12-04-2008 |
| 20080294316 | Method for Controlling a Hydraulic Cylinder in a Work Machine and Control System for a Work Machine - A method is provided for controlling a hydraulic cylinder in a work machine, which hydraulic cylinder is arranged to move an implement that is subjected to a load, with the hydraulic cylinder being controlled by a hydraulic machine. The method includes detecting that a lifting movement of the implement is to be initiated, and attaining a basic speed of the hydraulic machine before lifting takes place. | 11-27-2008 |
| 20080292474 | Method for Controlling a Hydraulic Machine in a Control System - A method is provided for controlling a hydraulic machine in a control system when utilizing the hydraulic machine as a pump, in which an electric machine is connected in a driving manner to the hydraulic machine. The method includes detecting at least one operating parameter, determining, based on the detected operating parameter, whether a pressure supplied by the hydraulic machine is to be limited, and controlling the electric machine correspondingly. | 11-27-2008 |
| 20080275615 | Method for Controlling Rotation Speed - The invention relates to a method for controlling rotation speed of at least one rotary element in the drive line of a vehicle. A first control model and a second control model are defined. The first control model calculates a permitted slip of at least one of the ground engagement elements of the vehicle at its ground contact point, which ground engagement element is driven via the rotary element. The second control model calculates a torque to said ground engagement element. The result of one of said control models is used for controlling the rotation speed of the rotary element. | 11-06-2008 |
| 20080264051 | Working Machine and a Method for Operating a Working Machine - A working machine including an internal combustion engine for supplying torque to the driving wheels of the working machine, and a transmission line arranged between the internal combustion engine and the driving wheels for transmitting torque from the internal combustion engine to the driving wheels. The working machine further including at least one hydraulic pump in a hydraulic system for moving an implement arranged on the working machine and/or steering the working machine. The transmission line includes at least one electric machine for driving or braking the driving wheels, and/or for generating electric power for the at least one hydraulic pump. | 10-30-2008 |
| 20080262682 | Method for Controlling a Braking Force of a Vehicle - A method and a system are provided for controlling a braking force of a vehicle. The method includes the steps of detecting at least one operating parameter of the vehicle, detecting a position of an operator controlled braking element, determining a magnitude of a braking force on the basis of a detected magnitude of the operating parameter and the detected position of the operator controlled braking element and braking the vehicle according to the determined braking force. | 10-23-2008 |
| 20080257629 | Method for Controlling Rotation Speed - A method for controlling rotation speed of at least one rotary element in the driveline of a vehicle is provided. At least one operating parameter is detected repeatedly, which operating parameter corresponds to an actual value of a torque in the driveline, which is delivered to the rotary element. A desired value of a torque to the rotary element is determined on the basis of friction against the ground of at least one of the ground engagement elements of the vehicle, which ground engagement element is driven via the rotary element. The rotation speed of the rotary element is controlled so that the actual value moves toward the desired value. | 10-23-2008 |
| 20080223631 | Working Machine - A working machine adapted for at least two functions, which include moving an implement and/or steering the machine, the machine includes: at least two hydraulic circuits, one hydraulic circuit for each of said functions, wherein each hydraulic circuit includes at least one hydraulic pump for operating the associated implement or steering function, a separate first electric machine drivingly connected to each of said hydraulic pumps for an individual supply of energy to the pump and extraction of energy from the pump, a transmission line for moving the working machine via driving wheels, wherein the transmission line includes at least one second electric machine, which is operatively connected to said first electric machines for an exchange of power between the hydraulic circuits and the transmission line. | 09-18-2008 |
| 20080210485 | CONTROL SYSTEM FOR FRAME-STEERING OF A VEHICLE AND METHOD FOR CONTROLLING TWO STEERING CYLINDERS IN A FRAME-STEERED VEHICLE - A control system ( | 09-04-2008 |
