Abstract: A pedal force simulator for a hydraulic brake system of a vehicle has a simulator chamber and a simulator piston that can be moved along a working path within the simulator chamber. The pedal force simulator has a line arrangement by which the simulator chamber can be brought into fluid communication with a pressure chamber of a brake cylinder of the hydraulic brake system. The line arrangement has a valve arrangement, the throttling effect of which depends on the position of the simulator piston along the working path.

Abstract: A system and method for detecting a pre-charge pressure of a hydraulic braking system are disclosed. A controller receives pressure readings from a pressure sensor indicative of the pressure of a hydraulic brake accumulator or the lower pressure of more than one accumulator. In response to fluid being provided to the hydraulic accumulator, the controller determines a first rate of pressure change, a second rate of pressure change different than the first rate, and a transition pressure between the first and second rates. The controller determines an approximate pre-charge pressure of the hydraulic brake accumulator based on the transition pressure. A warning can be provided to the operator or another when the determined pre-charge pressure is lower than a reference pressure.

Abstract: A braking device for a vehicle includes a cylinder, a master piston having a pressure applying piston portion and a servo pressure receiving portion, an input piston, a pressure accumulating device, a pilot pressure generating device, and a regulator having a first piston slidably fitted into a housing and dividing an inside of the housing into a first pilot chamber and a servo pressure generating chamber, a valve mechanism connecting the servo pressure generating chamber with the pressure accumulating device or a reservoir in response to movement of the first piston, and a second piston fitted into the housing and dividing the inside of the housing into the first pilot chamber and a second pilot chamber, wherein the second piston is formed so that an end surface thereof exposed to the first pilot chamber has a larger pressure-receiving surface area than an end surface exposed to the second pilot chamber.

Abstract: A method for brake pressure apply in a hydraulic brake system includes commanding a cage clearance reduction phase and commanding a wheel control phase subsequent to the cage clearance reduction phase. Accordingly, the cage clearance is reduced prior to entering the wheel control phase. A method for cage clearance reduction in a hydraulic brake system for roll stability control is also provided.

Abstract: A vehicle brake hydraulic control apparatus according to one embodiment includes: a suction valve; a pump; a motor for driving the pump; and a control unit controlling the suction valve and the motor through connection/disconnection of power thereto. The control unit includes: a detection module configured to detect a back electromotive voltage generated due to an inertia rotation of the motor after disconnection of power; a voltage check module configured to check whether a voltage condition is satisfied or not that the back electromotive voltage is equal to or less than a given voltage; and a time check module configured to check whether a time condition is satisfied or not that a given time has passed after the voltage condition has been satisfied. And, the control unit closes the suction valve when the time condition is satisfied.

Abstract: The invention relates to a brake system having a brake booster, in which pressure medium can be guided by means of at least one switchable valve (7, 15) from at least one wheel brake (10) into an accumulator chamber (8), wherein a control device controls at least the at least one switchable valve (7, 15), wherein, in the case of a disruption of the brake booster (1), in particular if the drive (11) thereof or the gear mechanism which is connected between the drive (11) and the piston of the brake master cylinder (4) is blocked, the at least one accumulator chamber (8) serves to receive pressure medium from at least one wheel brake or at least one brake circuit and therefore to dissipate pressure in at least one wheel brake.

Abstract: In a braking-force generator: a master cylinder generates first braking force corresponding to an operational input through a manipulator; a hydraulic-pressure generator connected to the master cylinder through a shutoff valve generates second braking force corresponding to the operational input through the manipulator when the shutoff valve is closed; an abnormality detector repeatedly determines whether or not an operational state of the hydraulic-pressure generator is abnormal; and a controller prohibits generation of the second braking force, opens the shutoff valve, and transmits the first braking force to the hydraulic-pressure generator, when the operational state is abnormal.

Abstract: A method for circuit separation testing in a double gearwheel pump having two gearwheel pumps includes charging one of the two gearwheel pumps with pressure and measuring the pressure build-up in the charged gearwheel pump and/or the pressure-build up in the other gearwheel pump. The pressure build-up is preferably realized by the gearwheel pump itself. The gearwheel pumps have a common pump shaft and are preferably configured as hydraulic pumps of a hydraulic vehicle brake system with slip control. The method detects any leak at the leadthrough of the pump shaft through a partition wall between the two gearwheel pumps.

Abstract: 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.

Abstract: A method of controlling a vehicle having a transmission system, an engine system, and a braking system includes detecting a braking condition of the braking system. The braking condition is at least one of a brake temperature being above a predetermined brake temperature limit and a braking load being above a predetermined braking load limit. The method also includes detecting a second condition of at least one of the transmission system and the engine system. The method also includes determining whether the second condition satisfies predetermined criteria. Furthermore, the method includes detecting an absolute vehicle acceleration that is below a predetermined acceleration limit. Moreover, the method includes downshifting from a current gear to a lower gear to thereby cause engine braking when the braking condition is satisfied, the second condition satisfies the predetermined criteria, and the absolute vehicle acceleration is below the predetermined acceleration limit.

Abstract: A method for hydraulically boosting a vehicle electric parking brake having a hydraulic service brake and an electric parking brake. Application forces electically generated by the parking brake function is superimposed on the boosting brake force generated by a hydraulic boosting brake pressure provided by the service brake to the brake actuator. When the parking brake is actuated to generate a predetermined application force, the force generated by the brake actuator is detected as the actual value, if an actual value of the measured value is smaller than a first target value a boosting brake pressure value is applied to the brake actuator, and by means of the parking brake function an adjustment function for the tension of the brake actuator to which the hydraulic boosting brake pressure is applied is carried out to achieve the predetermined application force.

Abstract: A method is provided for operating a parking brake module that is at least partially integrated into a compressed air generation system in the event of defects, having a control unit, solenoid valves, and a relay valve for aerating and deaerating at least one spring-loaded brake cylinder. A pressure in the parking brake module which is elevated compared to a normal pressure is determined. A constant compressed air delivery is stopped. A reduced switch-off pressure of the compressed air generation system is set. The pressure level in the parking brake module is lowered to the reduced switch-off pressure through repeated activation of the relay valve.

Abstract: A brake ECU brings master cut valves into an open state and brings holding valves into a closed state, thereby controlling a master cylinder and wheel cylinders to communicate to each other when a magnitude of a hydraulic pressure detected by an accumulator pressure sensor has decreased to a value less than a predetermined value set in advance. On the other hand, the ECU maintains holding valves in an open state, and controls an accumulator and the wheel cylinders to communicate to each other via linear control valves. Then, the ECU determines in which brake system a failure occurs out of a brake system for a front right wheel, a brake system for a front left wheel, and brake systems for rear right and left wheels based on changes in hydraulic pressure detected by a sensor, a master cylinder pressure sensor, and a control pressure sensor.

Abstract: 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.

Abstract: A vehicle brake system includes a pump, a sump, brake units and left and right manually operated brake valves. The brake system also includes, for each brake unit, a solenoid operated on-off valve having a first port connected to a pilot of one of the brake valves, a second port, a third port connected to one of the brake units, a solenoid and a spring which opposes the solenoid. The brake system also includes, for each brake unit, a solenoid operated proportional valve. Each proportional valve controls communication between the pump, the sump and the second port of a corresponding one of the on-off valves.

Abstract: A master cylinder 5 includes: a first liquid chamber 51 generating a liquid pressure in response to a brake operation of a driver; and a second liquid chamber 52 communicated with a reservoir 4 and connected to a suction port 70 of a pump 7. In a state in which the reservoir 4 and a suction section 70 of the pump 7 are communicated via the second liquid chamber 52, a liquid pressure of the first liquid chamber 51 can create a wheel cylinder liquid pressure.

Abstract: A brake apparatus includes: a fluid pressure control valve; a fluid pressure pump; a feedback control circuit correcting a control power corresponding to a 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 a 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.

Abstract: In a method for adjusting the clamping force exerted by a parking brake, which force is applied by an electric-motor braking apparatus and a hydraulic braking apparatus, the electric braking motor impinging upon a brake piston of a hydraulic wheel brake unit of the hydraulic braking apparatus, for the case in which the pre-pressure existing in the hydraulic braking apparatus exceeds a threshold pressure value, an inlet valve in the braking circuit of the hydraulic braking apparatus is closed, and the target braking force is established by actuation of the electric-motor braking apparatus.

Abstract: A system including: a liquid-pressure source device that can supply working fluid to a brake device; and an ABS valve device. The system executes a first control in which a supply pressure of the working fluid becomes a target supply pressure and a second control for making the supply pressure fall within the target range. In this system, when the valve device is not being operated, the first control is executed. When the valve device is being operated, the second control is normally operated, and when the supply pressure is higher than a threshold value, the first control is executed. Where completion of the operation of the valve device is estimated, the system performs at least one of reducing the threshold value, reducing an upper limit value of the target range, increasing an electric power supplied to a pressure-reduce linear valve during the first control when the valve device is being operated, and reducing the target supply pressure.

Abstract: A method for determining a lack of capacity of a pump, actuated by an electric motor, of a hydraulic brake system of a motor vehicle comprises the steps of generating a hydraulic pressure in a first brake circuit of the brake system by means of a plurality of pump elements of the pump that are assigned to the first brake circuit, limiting the generated hydraulic pressure to a test pressure and simultaneously acquiring a motor-related parameter, and determining a lack of capacity of at least one of the pump elements on the basis of a comparison of the parameter with a comparison value.

Abstract: A vehicle controlling system includes an engine serving as a power source of a vehicle; an electric storage device; an assist device that assists an operation of a driver by consuming power from the electric storage device so as to operate a running device that changes the running condition of the vehicle; and a starting device that consumes power from the electric storage device so as to start the engine, wherein the starting device automatically starts the engine based upon a physical quantity concerning the engine, and the start of the engine is inhibited while the assist device operates the running device, when the execution of an inertial running in which the engine is stopped to allow the vehicle to run with inertia.

Abstract: A brake system for a vehicle includes a main brake cylinder which has a first chamber which is hydraulically connected to at least one wheel brake cylinder for braking a wheel of the vehicle; an activating device for the driver to mechanically act on a piston of the main brake cylinder in order to pressurize hydraulic fluid in the first chamber of the main brake cylinder; and a pressure generating device which is hydraulically connected to the first chamber of the main brake cylinder, and which for activating the wheel brake cylinder supplies the wheel brake cylinder with hydraulic fluid through the first chamber of the main brake cylinder.

Abstract: A first and a second rotary pumps are provided in a first pump casing of a pump body, which is inserted into a cylindrical recessed portion of a housing 101. A first outlet port is opened at a first space formed between a bottom surface of the cylindrical recessed portion and an axial forward end surface of the first pump casing, so that discharge pressure of working fluid of the first pump is supplied to the first space. A second outlet port is opened at a second space formed between an axial backward end surface of the first pump casing and an axial forward end surface of a second pump casing, so that discharge pressure of working fluid of the second pump is supplied to the second space.

Abstract: A vehicle brake hydraulic control apparatus includes a reservoir, a hydraulic pressure pump, an orifice, a damper and a one-way valve. The reservoir absorbs an excess brake hydraulic pressure of a wheel brake. The hydraulic pressure pump suctions brake fluid absorbed by the reservoir and returns the suctioned brake fluid to a master cylinder through a return line. The orifice is provided in the return line. The damper is connected to the return line between the orifice and the hydraulic pressure pump and damps discharge pressure pulsation of the hydraulic pressure pump. The one-way valve is provided in the return line between the damper and the orifice and prevents a hydraulic flow from an orifice side to a damper side.

Abstract: A method for operating a hydraulic vehicle braking system that has an anti-lock control unit is disclosed. The system includes a brake master cylinder having an electromechanical brake booster. As the pressure level of the vehicle braking system decreases during an anti-lock control, in which all vehicle wheels are controlled, the boosting force of the brake booster is reduced in an anti-lock control of this type.

Abstract: When brake fluid of a first wheel cylinder (39a) of a slave cylinder (23) is increased by supplying the brake fluid to a first wheel cylinder (16, 17) by a first pump (64A), a second piston (38B), which is a free piston, of the slave cylinder (23) moves toward the first fluid pressure chamber (39A) side, the volume of a second fluid pressure chamber (39B) thereby expands, and the brake fluid pressure of a second wheel cylinder (20, 21) can be reduced, whereas when brake fluid pressure of the second fluid pressure chamber (39B) is increased by supplying the brake fluid to the second wheel cylinder (20, 21) by a second pump (64B), the second piston (38B) moves toward the second fluid pressure chamber (39B) side, the volume of the first fluid pressure chamber (39A) thereby expands, and the brake fluid pressure of the first wheel cylinder (16, 17) can be reduced, thus enabling a difference in brake fluid pressure to be freely generated between the first and second wheel cylinders (16, 17).

Abstract: Brake fluid pressure control apparatus includes: fluid pressure passage from a fluid pressure source to a wheel brake; pressure regulating valve arranged on the passage; pump for feeding pressurized brake fluid to the passage between the valve and the wheel brake; motor for driving the pump; and controller which controls an electric current applied to the valve in accordance with target fluid pressure for the wheel brake to control fluid pressure supplied to the wheel brake. The controller includes: means for converting the target fluid pressure into fluid volume and calculating required flow rate from this fluid volume; means for calculating required rotation speed of the motor from the required flow rate and on the basis of efficiency of the pump; and means for increasing the electric current applied to the valve for a predetermined value when the required rotation speed exceeds actual rotation speed of the motor.

Abstract: A method for dimensioning the admission pressure at a first, analogized, electromagnetically actuated hydraulic valve for sensitively regulating the pressure in a pressure circuit in which the admission pressure at the first valve can be set by the delivery capacity of an engine pump assembly which is connected to the first valve via a pump-outlet-side pressure line, in particular in a hydraulic motor vehicle brake system, wherein the admission pressure is set by electronically evaluating the tappet reaction of the first valve or of a further hydraulic valve which is also actuated electromagnetically and is connected to the pump-outlet-side pressure line. An electronically controlled motor vehicle brake pressure control device with which the above method can be carried out is also described.

Abstract: A brake control apparatus has a master cylinder pressure detection section that detects a master cylinder pressure produced by driver's brake operation, a pump that draws brake fluid in a master cylinder and discharges the brake fluid to a wheel cylinder that is provided in a wheel, and a control unit that controls a wheel cylinder pressure in response to the detected master cylinder pressure. The control unit has a master cylinder pressure correction section that corrects the detected master cylinder pressure in accordance with a discharge flow quantity of the pump, and a wheel cylinder pressure control section that controls the wheel cylinder pressure by the brake fluid discharged from the pump on the basis of the corrected master cylinder pressure.

Abstract: In a method for controlling an electronic parking brake system and an electronic parking brake system, a travel-optimized method is used to achieve the released state of the parking brake system. When the parking brake is applied, travel-force values are detected and a plausibility check is run, the values being used to arrive at a first optimized position when the brake is released. If the residual force applied to the brake exceeds a threshold value, the parking brake is released even more until the value remains just under the threshold value or until a maximum defined release travel is achieved.

Abstract: An engine with a positive pressure assisted brake booster is disclosed. In one example, an operator applying vehicle brakes is assisted by positive pressure provided by a compressor coupled to an engine of the vehicle. Operation of the vehicle brakes may be improved especially when engine vacuum is limited.

Abstract: A hydraulic braking valve having an inlet orifice intended to be connected to a pressure supply, an outlet orifice intended to be connected to a braking unit, a leak orifice intended to be connected to a tank, a power distributor adapted so as to connect the inlet orifice to the outlet orifice in a braking configuration, and a leak orifice to the outlet orifice in a rest configuration. The power distributor is driven by two independently driven calibrators.

Abstract: An apparatus for supplementing a brake vacuum pressure may include an engine control unit (ECU) that generates a vacuum pressure control signal for supplementing the brake vacuum pressure in accordance with the result of determining whether the brake vacuum pressure is included in a reference vacuum pressure range after a vehicle implements an ISG process, a sub-oil pump that is operated in accordance with a control signal from the ECU to supply hydraulic pressure to the inside of an automatic transmission after the vehicle implements the ISG process, a vacuum pump that generates and supplies the brake vacuum pressure to a brake system, and an electronic clutch that selectively couples the sub-oil pump and the vacuum pump to allow driving force of the sub-oil pump to be transmitted to the vacuum pump or to be cut, in accordance with whether the vacuum pressure control signal is sent thereto.

Abstract: A sealing structure is provided wherein an annular groove formed in a pump cylinder of a piston pump receives therein a seal ring made of a synthetic resin material and having an inner circumferential surface fluid-tightly contacting an outer circumferential surface of the pump piston and an O-ring arranged on the outer circumferential side of the seal ring and urging the seal ring radially inward. The seal ring is formed at its axial end portions with flange portions for preventing the O-ring from coming off. In the state that the seal ring and the O-ring are fitted in the annular groove, the flange portions do not receive a load from the O-ring, and a surface pressure which the seal ring applies to the outer circumferential surface of the piston at an axial center portion thereof is set to be higher than surface pressures which it applies to the outer circumferential surface of the piston at axial end portions thereof.

Abstract: A device and method for a hydraulic brake system of a land vehicle in order to block a brake circuit of the brake system with regard to a supply of brake pressure generated by a driver, to establish a hydraulic connection between the output side of a wheel brake and the input side of a controllable pump and to generate a predetermined brake pressure at the input side of the wheel brake by the use of a pump.

Abstract: Taking a stroke within a period from when an operation of a brake operating member is started to when a predetermined stroke operation is performed as an ineffective stroke in which the master cylinder pressure is not generated, a control means controls an amount of differential pressure formed by a differential control valve such that a hydraulic braking force that corresponds to a stroke of the brake operating member is generated during the ineffective stroke, and even after the stroke of the brake operating member exceeds the ineffective stroke, increases the wheel cylinder pressure by performing raising of the amount of differential pressure formed by the differential pressure control valve by a predetermined raising amount with respect to the amount of differential pressure during the ineffective stroke.

Abstract: A creep travel capability of an electric vehicle is secured when an abnormality occurs in a brake sensor. When an accelerator operation amount reaches 0% in a low vehicle speed region, a target creep torque is set, whereupon a motor-generator is controlled toward the target creep torque. The target creep torque is reduced as a brake pedal is depressed in order to suppress heat generation and the like in the motor-generator during vehicle braking. Hence, in an electric vehicle in which the target creep torque is varied in accordance with the brake operation amount, when an abnormality occurs (step S11) in a brake sensor for detecting a brake operation amount, a preset prescribed creep torque is employed as the target creep torque regardless of the brake operation amount (step S15). The prescribed creep torque is set at a required magnitude for securing the creep travel capability.

Abstract: The invention relates to a brake system for a vehicle, with a main brake cylinder, a fluid control unit, and at least one wheel brake. The fluid control unit has, for brake pressure modulation in at least one brake circuit a switchover valve, an intake valve and a recirculating pump for each brake circuit. According to the invention, the fluid control unit has, for each brake circuit, a sliding valve which is connected into a suction line between the recirculating pump and the main brake cylinder. The sliding valve restricts the effective pressure on a suction side of the recirculating pump to a predeterminable maximum pressure value. In this case, the sliding valve can be arranged in series with or parallel to the intake valve.

Abstract: To make a brake device generate a required braking force, a hydraulic control section switches, according to the relative magnitude between the required braking force and a braking force exerted by braking operation, between drive of a pump motor and non-drive of the pump motor and a master cut valve reduces the flow of brake fluid in the direction to a master cylinder. By this, a wheel cylinder maintains hydraulic pressure capable of generating the required braking force. As a result, the pump motor is not necessarily always driven when the required braking force is generated, and the operating time period of the pump motor is reduced. As a result, a load on the pump motor is reduced to enhance durability of the pump motor.

Abstract: A brake control apparatus is provided with a frictional braking unit configured to generate frictional braking force, a regenerative braking unit configured to generate regenerative braking force, a fluid pressure control valve configured to adjust an operating fluid pressure, and a controlling unit configured to execute regenerative control to cover entire required braking force required by a driver by the regenerative braking force and executing switching control to cover the required braking force by the frictional braking force in place of the regenerative braking force by adjusting to increase the operating fluid pressure by the fluid pressure control valve when a predetermined condition is satisfied. By covering the entire required braking force by regenerative braking force and executing the switching control to adjust to increase the operating fluid pressure by the fluid pressure control valve to cover the required braking force when a predetermined condition is satisfied.

Abstract: The invention relates to an electrohydraulic power unit for controlling, by open or closed loop, a brake pressure of a hydraulic vehicle brake system, comprising a hydraulic block, which has a hydraulic pump and on which an electric motor for driving the hydraulic pump is provided, an electronic control device, which is provided on a side of the hydraulic block opposite the electric motor, and at least one electrical contact (8), which electrically conductively connects the electric motor to the electronic control device. The electrical contact (8) is accommodated in a rod-shaped isolator. The rod-shaped isolator, together with the electrical contact (8) accommodated therein, is guided through a through-passage in the hydraulic block, said through-passage extending through the hydraulic block from the side of the hydraulic block on which the control device is provided to the side of the hydraulic block on which the electric motor is provided.

Abstract: A brake control apparatus is equipped with a plurality of fluid pressure adjusting valves that have opening degrees thereof adjusted through energization control to adjust the fluid pressures, a plurality of valves that are provided in series with at least two of the fluid pressure adjusting valves, are closed during stoppage of energization to hold the fluid pressures, and a brake ECU. The brake ECU controls fluid pressure adjustment achieved by supplying the fluid pressures to the wheel cylinders respectively, opening the communication valves, and adjusting the opening degrees of the fluid pressure adjusting valves to adjust the fluid pressures respectively, and fluid pressure holding achieved by closing the communication valves, opening the fluid pressure adjusting valves, and holding the fluid pressures by means of the communication valves respectively.

Abstract: A vehicular lane departure prevention control apparatus calculates first and second departure amounts based on lane line position information and obstacle position information, sets braking forces for lane departure prevention control based thereon, and outputs the braking forces to a brake control unit, the braking forces for generating a yaw moment and a deceleration to a subject vehicle and preventing the vehicle from departing with respect to the lane line and obstacle, while setting a departure level for target pump motor rotation speed setting based on a vehicle speed, a difference of the steering wheel angle from a crossing angle and the first departure amount, setting a target rotation speed for a pump motor of a hydraulic unit in a brake control unit based thereon, and then outputting the target rotation speed to the brake control unit so as to variably control the rotation speed of the pump motor.

Abstract: 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.

Abstract: An electronically controlled boosted brake system including an isolation valve between a source of pressurized fluid and a boost valve for selectively restricting the flow of fluid from the source to the boost valve. Another feature of the brake system relates to an accumulator valve connected between the boost valve and the accumulator for controlling when the operating pressure of the accumulator is supplied to the boost valve. Yet another feature is a unique master cylinder design including at least one primary piston positioned within a housing in an overlapping relationship with portions of a pair of secondary pistons.

Abstract: A method for controlling an automated clutch, which comprises a hydraulic clutch actuating system having a hydrostatic actuator, the pressure of which is detected. The method includes using the pressure of the hydrostatic actuator to adapt the characteristic curve of the clutch.

Abstract: A brake system for a vehicle has a first and a second brake control device, four wheel actuator devices, and a first and a second signal line, the first signal line connecting the first brake control device to two of the four wheel actuator devices and the second signal line connecting the second brake control device to the two other wheel actuator devices, each of the four wheel actuator devices in the active state being additionally designed to detect whether a specified number of brake control devices and/or wheel actuator devices are in the inactive state, in which case a specified braking torque is exerted on the wheel of the vehicle associated with the brake control device.

Abstract: A method and system for measuring pressure in a pressure regulation unit of a motor vehicle braking system, without using pressure sensors and having a motor pump unit with an electric motor and a hydraulic pump. The steps include producing a relative motor characteristic diagram for a series of the units. The diagram includes the data of motor-rotational-speed-dependent parameters, intensity of the motor actuation, and parameters relating to the level of the motor load. Further steps include; determining individual motor characteristic variables, determining a current rotational-speed-dependent parameter of an individual motor during the operation of the pump, and calculating a pressure which is characteristic of the braking system, by means of the diagram parameter of the individual motor and the value of the current motor actuation which determines the intensity of the motor actuation, wherein the individual motor characteristic variables are taken into account.

Abstract: A hydraulic motorcycle braking system is disclosed. In the hydraulic motorcycle braking system a pump suction valve, which is situated in a braking circuit that does not contain an isolating valve or a change-over valve, has a higher opening pressure than a pump suction valve which is situated in a braking circuit provided with an isolating valve and a change-over valve. Accordingly, pressure oscillations initiated during the start-up of the pump cannot have a retroactive effect or only have a slight retroactive effect on the actuated brake master cylinder.

Abstract: A braking device comprises: a master cylinder; an electrical pressure adjusting unit; a reaction force generating unit, which forms a reaction force chamber and which generate a reaction hydraulic pressure in the reaction force chamber; a reservoir for brake fluid; an inter-chamber brake fluid path; a reservoir path that connects the reservoir and the inter-chamber brake fluid path; and a normally-closed control valve, wherein the electrical pressure adjusting unit includes an electrical pump which is directly connected with the driving hydraulic pressure chamber to supply the brake fluid to the driving hydraulic pressure chamber, and wherein at least one of electromagnetic valves provided in the electrical pressure adjusting unit and the reaction force generating unit is a normally-opened electromagnetic valve, which is provided in the inter-chamber brake fluid path and is configured to communicate the inter-chamber brake fluid path in a non-conduction state.