Abstract: A brake control system includes a wheel cylinder, a brake pedal, a master cylinder in which communication between it and an external master cylinder reservoir is cut off when the operating amount of the brake pedal is equal to or greater than a predetermined value, an internal reservoir, and a pump which selectively discharges hydraulic fluid in two directions, one being a direction that increases the hydraulic pressure in the wheel cylinder by drawing up hydraulic fluid from the internal reservoir, and the other being a direction that stores hydraulic fluid in the internal reservoir. The pump is driven to discharge hydraulic fluid in the direction that stores hydraulic fluid when communication is open between the master cylinder and the master cylinder reservoir, and driven to discharge hydraulic fluid in the direction that increases the hydraulic pressure when communication is cut off between the master cylinder and the master cylinder reservoir. A further invention is directed to a brake control method.

Abstract: In brake liquid pressure control, a time wasted after the control is started until brake application is actually started is reduced and pulsation noise of brake liquid pressure is reduced. When automatic following control of a vehicle is being operated, a motor for pressure increase is set to idle if a predetermined condition at which the vehicle starts deceleration is reached before an automatic brake command is issued from an automatic following control device. Further, when the throttle of an engine is at predetermined condition at which rapid acceleration does not occur, brake liquid pressure is increased to a level at which the vehicle does not decelerate.

Abstract: An automotive hydraulic brake system is provided which exhibits an excellent pressure reduction performance to a low ? road while restraining an intake resistance of a fluid pump. For providing the hydraulic brake system, a gate-in valve is connected to an intake passage that connects a master cylinder to an intake side of the fluid pump. The gate-in valve selectively opens and closes the intake passage in accordance with a mutual relation between a master cylinder pressure and a pressure produced at an intake side of the fluid pump.

Abstract: In an ABS control, a vehicle brake control device detects a sudden change road in which a friction coefficient changes suddenly from a high value to a lower value and controls, based on the detection of the sudden change road, the currents to be supplied to a first and a second electrical motor in a first manner or a second manner, wherein in the first manner the currents are controlled so that the first and second electrical motors would eventually stop rotating if the motor control portion kept controlling the currents in the first manner for a sufficiently long time, and in the second manner the currents are controlled so that the first and second electrical motors would eventually start rotating in a reverse direction if the motor controlling portion kept controlling the currents in the second manner for a sufficiently long time.

Abstract: An electrohydraulic brake unit for a hydraulic, single- or multiple-circuit brake system that enables regenerative braking is provided. It comprises a unit body, which comprises electrically actuable fluid control valves and hydraulic connection lines between the fluid control valves, an electronic closed-/open-loop control circuit for supplying trigger signals for the fluid control valves in order to modulate the hydraulic pressure in the brake circuits, and a fluid feed pump. In the unit body a simulator for regenerative braking is at least partially integrated, which comprises at least one cylinder/piston arrangement, with which at least one resetting spring arrangement, in the form of at least one spring element, is associated. This simulator projects at least partially out of the unit body.

Abstract: A brake unit of a slip-controlled motor vehicle brake system with a fluid supply device with an electrically operated fluid supply device provides a pressurised hydraulic or pneumatic fluid in the brake circuits of the brake system. The fluid supply device has a pressure chamber with at least one fluid inlet and at least one fluid outlet. One non-return valve each is provided at the fluid inlet and the fluid outlet. A piston which protrudes into the pressure chamber is movable at least into one of two end positions by means of an electric drive device. In the one end position, a minimum volume is defined by the pressure chamber and the piston. In the other end position, a maximum volume is defined by the pressure chamber and the piston.

Abstract: An electrohydraulic brake system having a muscle-force-actuatable auxiliary brake and an external-force-actuatable service brake includes operating mode switchover valves triggerable by an electronic control unit for switching from the service braking state to the auxiliary braking state. A piston/cylinder unit with a pressure medium connection between a master cylinder and a wheel brake which is interrupted by the switchover valves to simulate the pedal travel in the service braking state. The piston/cylinder receives the pressure medium displaced in the master cylinder by actuation of the brake pedal by the driver's foot. The piston/cylinder unit can be hydraulically blocked in the auxiliary braking state so that pressure medium positively displaced in the master cylinder is available to the greatest possible extent for building up pressure at the wheel brakes. The subjection of the piston/cylinder unit to pressure medium is controlled via one of the operating mode switchover valves.

Abstract: To provide a brake control apparatus and method for controlling the brake which is capable of preventing a fluctuation of a brake pedal stroke amount when switching a regenerative braking force to a hydraulic braking force.

Abstract: A hydraulic vehicle brake system, which has a brake pressure signal generator which can be activated by a brake activation device, wherein the brake pressure signal generator can be connected to wheel brakes of the vehicle via at least one hydraulic line and is composed essentially of a master brake cylinder and a hydraulic booster which is connected upstream and which has a return flow chamber and a boosting chamber, a working piston arranged therein and a control piston, wherein the working piston is operatively connected in the force outputting direction to a master brake cylinder piston via an activation element, and a hydraulic pressure of a hydraulic pressure source can be applied to the booster via an inlet for the purpose of boosting braking force, wherein an outlet of the booster can be connected to a reservoir vessel.

Abstract: A hydraulic device includes a gerotor assembly, a wobble stick, an output shaft, a housing assembly, a first port in the housing assembly, a second port in the housing assembly, first brake disks, second brake disks, a piston, and a biasing member. The gerotor assembly includes a rotor and a stator. The wobble stick connects at a first end to the rotor. The output shaft connects to a second end of the wobble stick. The housing assembly receives the gerotor assembly, the wobble stick and the output shaft. The first port is in communication with the gerotor assembly. The second port is also in communication with the gerotor assembly. The first brake disks connect to the output shaft The second brake disks connect to the housing assembly The piston is disposed in the housing assembly adjacent at least one of the brake disks. The piston cooperates with the housing assembly to define a brake pressure chamber.

Abstract: A working machine, such as an industrial truck, has working hydraulics, a hydraulic steering device, and a spring-loaded brake. The brake has a braking position and a release position and can be acted upon by a brake-release pressure, which is passed in a brake line, so as to be brought into the release position. A hydraulic pump is provided for the supply to the working hydraulics and the steering device and for producing the brake-release pressure of the spring-loaded brake. The brake line of the spring-loaded brake is connected to a delivery branch line, which is connected to the pump, of the steering device.

Abstract: A combination secondary master cylinder and brake pedal compliance device for an automotive braking system includes a cylinder having a signal chamber, a working chamber, and a compliance chamber. Elastic devices mounted within the working chamber and compliance chamber allow the apparent compliance of the friction braking system attached to the combination device to remain at a relatively constant value notwithstanding the presence of varying amounts of powertrain braking.

Abstract: The control device adapted to a vehicle brake apparatus includes a vacuum obtaining portion, a master cylinder pressure obtaining portion and a boosting control portion for executing a boosting control which controls supplying of a boosting pressure established by driving the hydraulic pressure pump and controlling the pressure differential control valve so that the boosting pressure agrees to a target boosting pressure obtained with a target boosting gain smaller than a basic boosting gain which indicates a servo-ratio of the vacuum booster up to the time, when the master cylinder pressure becomes equal to or more than a boosting limit pressure which is a master cylinder pressure corresponding to a boosting limit of the vacuum booster at the vacuum obtained by the vacuum pressure obtaining portion, in addition to the master cylinder pressure established in response to the operation of the brake operation member.

Abstract: Methods and valve arrangements for controlling the flow of pressurized air from a tractor to a trailer reservoir and to a trailer spring brake chamber. In one exemplary embodiment, pressurized air from a tractor is supplied from a tractor to the trailer reservoir and to the trailer spring brake in different filling modes based on a user input. In another exemplary embodiment, pressurized service air is used to charge or partially charge the trailer reservoir.

Abstract: A vehicle brake control apparatus is provided with a master cylinder capable of outputting master cylinder pressure, which is pressure of operating fluid generated by operation of a brake pedal, and hydraulic pumps capable of outputting pressurized pressure generated by pressurizing the operating fluid as braking force, wherein a brake ECU is configured to detect driver's requested braking force based on the master cylinder pressure to drive-control the hydraulic pumps based on the requested braking force, and when the hydraulic pumps outputs the braking force, the brake ECU changes the requested braking force according to a pedal stroke of the brake pedal at the time of the detection of the requested braking force, thereby enabling high-precision braking force control by setting optimal requested braking force always according to intension of a driver irrespective of a driving condition of the vehicle to improve drivability.

Abstract: Disclosed herein is an electronic control brake system that has a compact structure while rapidly forming an oil pressure during active control and reducing pressure pulsation, simultaneously. The electronic control brake system includes a master cylinder assembly to provide braking force, a plurality of brake cylinders to achieve braking, first and second hydraulic circuits connecting the master cylinder and the plurality of brake cylinders to form a closed circuit, a pump unit installed in the first and second hydraulic circuits to achieve active control, and a motor to drive the pump unit.

Abstract: This apparatus is applied to a vehicle brake apparatus provided with a hydraulic booster operated by utilizing an accumulator hydraulic pressure that is adjusted to a predetermined high pressure (not less than a lower limit value) by a drive control of a hydraulic pump. This apparatus executes an automatic pressurization control by controlling plural solenoid valves with the use of the accumulator hydraulic pressure. The increasing slope of the brake hydraulic pressure during the automatic pressurization control is determined on the basis of the vehicle motion state. The increasing slope is restricted to be not more than a predetermined restriction value, in the case where the accumulator hydraulic pressure at the time of starting the automatic pressurization control is less than “a reference hydraulic pressure that is greater than a minimum value of the accumulator hydraulic pressure necessary for assisting the brake operation by the hydraulic booster and smaller than the lower limit value”.

Abstract: A linear dual channel hydraulic control unit for a motor vehicle, having a motor section with an output shaft having a first output shaft end and an opposing second output shaft end. A rotationally adjustable wobble plate having an apex portion is fixed onto either end of the output shaft. A hydraulic block is mated onto either end of the motor section. Each hydraulic block includes an inlet for fluid communication with a braking fluid source and an outlet for fluid communication with a braking system brake, a pump cavity housing a pumping assembly and having an opening disposed on a first end, and first and second valve cavities housing first and second fluid control valves. Mated to each hydraulic block is a control sections providing first and second solenoid coils receiving portions of the first and second fluid control valves.

Abstract: In a method for braking a vehicle by means of a fluidically triggerable vehicle brake system, wherein the vehicle brake system comprises a respective fluidically triggerable brake unit that is assigned to a vehicle wheel and is fluidically coupled to a brake force generator via at least one fluid circuit, wherein a pumping mechanism by means of which at least one of the brake units can be fed with brake fluid regardless of whether the brake force generator is activated, is provided in the at least one fluid circuit in order to convey brake fluid, and wherein control valves by means of which the brake force generator can be fluidically coupled to and disconnected from the brake units and the pumping mechanism are provided in the fluid circuit, it is provided that in order to comfortably create a parking brake condition, the following steps are carried out: A) a fluid pressure is built up in the at least one fluid circuit via the brake force generator such that at least two of the brake units are fluidically t

Abstract: This apparatus is applied to a vehicle brake apparatus provided with a hydraulic booster operated by utilizing an accumulator hydraulic pressure that is adjusted to a predetermined high pressure (not less than a lower limit value) by a drive control of a hydraulic pump. This apparatus executes an automatic pressurization control by controlling plural solenoid valves with the use of the accumulator hydraulic pressure. The increasing slope of the brake hydraulic pressure during the automatic pressurization control is determined on the basis of the vehicle motion state. The increasing slope is restricted to be not more than a predetermined restriction value, in the case where the accumulator hydraulic pressure at the time of starting the automatic pressurization control is less than “a reference hydraulic pressure that is greater than a minimum value of the accumulator hydraulic pressure necessary for assisting the brake operation by the hydraulic booster and smaller than the lower limit value”.

Abstract: The speed of an ABS pump motor is increased during an ABS braking cycle upon determining that an extended ABS braking cycle duration is required.

Abstract: A vehicle brake control device determines a first duty factor required to achieve a stable rotational speed of motors and a second duty factor required to achieve a change rate of a target wheel cylinder pressure. The vehicle brake control device selects the larger one of the determined duty factors as a for-use motor duty factor to be used in outputting currents to the motors. Therefore, with the stable rotational speed and the change rate of the target wheel cylinder pressure, it is possible to achieve quick response to a request for braking made by a driver while suppressing the electric energy consumption of the motors.

Abstract: When the ABS control is executed by the ABS control portion, the vehicle brake control device calculates the first rotational speeds of the first and second motors necessary to achieve the corresponding pressure increase rates and calculates the second rotational speeds of the first and second motors as the upper limits caused by the unlocking pressure limits. Then the vehicle brake control device controls current values of the currents to be supplied to the first and second motors so that they are rotated in the rotational speeds obtained within a range from the first rotational speeds to the second rotational speeds.

Abstract: The present disclosure relates to a pump system for parking brakes for a rail vehicle. The pump system includes at least one actuator, at least one pump and a reservoir as a fluid source. Also included is a manifold in fluid communication with the reservoir and the actuator. Further included are a plurality of valves and fluid paths internal to the manifold to allow fluid flow among the at least one pump and the reservoir.

Abstract: A vehicular brake hydraulic pressure control device includes accumulators that are connected to a first brake pedal and store brake fluid with a first master cylinder at atmosphere. A first brake system is operable to apply interlock control to a front wheel brake F of a second brake system. A switching unit switches a channel of brake fluid flowing to the first hydraulic pressure output channel of the first brake system, from the first master cylinder to the accumulators when a pump is in operation.

Abstract: A wheel motor device according to the present invention includes a hydraulic motor main body forming an HST in cooperation with the hydraulic pump main body, a motor shaft supporting the hydraulic motor main body in a relatively non-rotatable manner, a speed-reduction gear mechanism for reducing the speed of the rotational power output from the motor shaft, a first output member for outputting the rotational power whose speed has been reduced by the speed-reduction gear mechanism toward a corresponding first driving wheel, a casing accommodating the hydraulic motor main body and the speed-reduction gear mechanism, and a brake mechanism selectively and operatively applying a brake force to the first output member.

Abstract: A hydraulic control unit for a motor vehicle having a motor providing a drive shaft driving a rotatable piston bearing surface at a proximal end of the motor, a hydraulic block providing cavities housing a pumping assembly and fluid control valves, and a control section providing solenoid coils receiving portions of the fluid control valves, with the pump cavity being disposed on a first end of the hydraulic block and the valve cavities being disposed on an opposite end of the hydraulic block, and the pumping assembly being reciprocalably driven by the rotatable piston bearing surface along an axis radially disposed from and otherwise parallel to the axis of rotation of the rotatable piston bearing surface. In another aspect, a pump element having a ball bearing assembly mounted at an oblique angle with respect to the axis of rotation of a seat, and a pumping assembly reciprocally bearing against an outer portion of the ball bearing assembly.

Abstract: A brake control system for a motor vehicle comprising a brake control unit which controls increasing and decreasing of a brake pressure of a wheel cylinder from a pressure source by driving plural solenoid valves without a brake operation by a driver. The system comprises a flow back control unit which controls the brake pressure of a wheel cylinder to drive the plural solenoid valves before control by the brake control unit and returns the brake fluid to the pressure source from the wheel cylinder.

Abstract: A brake control apparatus includes a fluid pressure sensor to sense an actual master cylinder pressure, a pump to suck a brake fluid from the master cylinder through a hydraulic circuit connecting the master cylinder to a wheel cylinder and a controller to perform a brake assist control to supply a discharge pressure of the pump to the wheel cylinder in accordance with the sensed actual master cylinder pressure signal. The controller calculates a modified master cylinder pressure by modifying the actual master cylinder pressure in accordance with an operating condition of the pump, calculates a base pressure in accordance with a variation of the modified master cylinder pressure, and calculates a target wheel cylinder pressure in accordance with the base pressure, to control a braking force by controlling an actual wheel cylinder pressure of the wheel cylinder in accordance with the target wheel cylinder pressure.

Abstract: A brake boost control apparatus has a brake operation member, a master cylinder, a wheel cylinder, a hydraulic pump, a master cylinder pressure detection section detecting a pressure of the brake fluid, a brake stroke amount detection section detecting a stroke amount of the brake operation member, a hydraulic pressure control section that controls a pressure of the wheel cylinder, a boost section which boosts the pressure of the brake fluid and increases the wheel cylinder pressure, and a control unit. The control unit controls at least one of the hydraulic pump and the hydraulic pressure control section so that the stroke amount detected by the brake stroke amount detection section under a boost operation by the boost section and the pressure detected by the master cylinder pressure detection section are maintained at a predetermined relationship.

Abstract: In a brake control apparatus, a fluid passage section is hydraulically connected between a hydraulic pressure source and a wheel cylinder. A first pressure sensor measures a first quantity correlated to a hydraulic pressure outputted by the hydraulic pressure source. A second pressure sensor measures a second quantity correlated to an internal pressure of the wheel cylinder. A controller controls a braking force of a wheel by the wheel cylinder. The controller is configured to: allow the first pressure sensor to obtain a value of the first quantity, and allow the second pressure sensor to obtain a value of the second quantity, while allowing a selector to regulate fluid communication between the hydraulic pressure source and the wheel cylinder; and calibrate the first and second pressure sensors with respect to each other in accordance with the obtained values of the first and second quantities.

Abstract: In brake liquid pressure control, a time wasted after the control is started until brake application is actually started is reduced and pulsation noise of brake liquid pressure is reduced. When automatic following control of a vehicle is being operated, a motor for pressure increase is set to idle if a predetermined condition at which the vehicle starts deceleration is reached before an automatic brake command is issued from an automatic following control device. Further, when the throttle of an engine is at predetermined condition at which rapid acceleration does not occur, brake liquid pressure is increased to a level at which the vehicle does not decelerate.

Abstract: During normal braking, a brake fluid supply route is used through which brake fluid is supplied from a master reservoir to wheel cylinders to using first to fourth pumps. When an abnormality occurs, a route is used through which a master cylinder pressure, which is generated by depressing a brake pedal, is transmitted through brake conduits to the wheel cylinders for both front wheels. First to fourth linear valves are provided in parallel with the first to fourth pumps, respectively, and during normal braking, the first to fourth linear valves are operated under duty control to adjust the wheel cylinder pressures that are generated in the wheel cylinders to, respectively.

Abstract: The invention solves the problem of supplying fresh fluid, in particular in electrohydraulic brake systems, to all areas of the conduit systems that are not reached in a conventional brake fluid change. Therefore, the invention provides that a change of the pressure fluid be assisted by a hydraulic pump, during which change among others pressure fluid is delivered by means of the pump out of the pressure fluid reservoir through the inlet valves and out of the system through opened wheel bleeder connections.

Abstract: A controller which controls an electric motor in such a manner that a rotational speed detected in a motor rotational speed detecting module 29 becomes a target rotational speed set in a target rotational speed setting module 37 controls, when a deviation between the rotational speed and the target rotational speed is large, a normally open solenoid valve in such a manner that a controlled variable of the normally open solenoid valve becomes smaller when the deviation is small.

Abstract: Provided are a brake control system for a vehicle and a control method thereof.

Abstract: A brake control apparatus for a vehicle includes: controlling means having timing means for timing an elapsed time from a brake operation starting time, and extended period of time calculating means obtaining an extended period of time based upon a target wheel cylinder pressure corresponding to an operation amount detected by an operation amount detecting sensor when the timing means times a predetermined period of time at which an amount of brake fluid discharged by each pump reaches a threshold value of brake fluid amount to generate an actual wheel cylinder pressure. During the extended period of time, the value of electric current to be supplied to each first and second motor is maintained at the maximum value.

Abstract: An anti-lock hydraulic braking system has a wheel brake circuit with a main brake cylinder, wheel brake cylinder and switching valve, and an auxiliary pressure circuit, connected in parallel between the switching valve and wheel brake cylinder on the wheel brake circuit. With ABS control, the switching valve can be switched from a basic position, where it hydraulically connects the main brake cylinder and wheel brake cylinder, to a switched position where it prevents a build-up of braking pressure on the wheel brake cylinder via the main brake cylinder, while the braking pressure on the wheel brake cylinder can be modulated by the auxiliary pressure circuit.

Abstract: When an abnormality detection unit detects an abnormality in a vehicle brake system, a heat generation suppression unit operates the motor intermittently to suppress heat generation by the motor. A pressure increase determination unit determines whether there is a need to increase pressure to the wheel cylinders of the brake system. When there is a need to increase pressure to the wheel cylinders, the heat generation suppression unit operates the motor. When there is no need to increase pressure to the wheel cylinders, the heat generation suppression unit stops the motor.

Abstract: The present invention relates to a device and method for controlling the braking system of a vehicle equipped with a wheel slip control system. In this context, the wheel slip control system is in a position, when certain conditions are met, to initiate the buildup of first braking torques at least one wheel brake. Furthermore, the wheel slip control system initiates preparatory measures for the buildup of second braking moments in the wheel brakes of the remaining wheels, the preparatory measures leading to no, or no significant, braking action in the wheel brakes of the remaining wheels. The present invention provides the preparatory measures for the buildup of second braking moments in reaction to the buildup of the first braking moments.

Abstract: The invention provides a method for controlling a vehicle with a braking system including a modulator pump. A first fluid line can communicate brake fluid from the master cylinder to a brake caliper. An isolation valve including a pressure bypass can be disposed along the fluid line between the master cylinder and the brake caliper. A second fluid line can extend from a first position along the first fluid line between the master cylinder and the isolation valve to a second position along the first fluid line between the isolation valve and the brake caliper. A modulating pump is disposed along the second fluid line to pump fluid to the brake caliper during a controlled brake event. The modulator pump is engaged to pump fluid to the brake caliper until the pressure in the first fluid line reached slightly below the predetermined pressure to prevent the isolation valve from opening in response to excessive pressure.

Abstract: A device for supplying pressure to an actuation unit of a vehicle brake system, in particular to a vehicle brake system of the ‘brake-by-wire’ type, comprising a pneumatic motor-and-pump assembly with a pump and a motor driving the pump, wherein the motor-and-pump assembly is controlled by an electronic control unit depending on a pressure level or pressure difference in a pneumatic brake booster of the actuation unit, with the pressure level in a chamber or a difference in pressure between two chambers of the brake booster being detected by means of a sensor. In order to maintain the availability of the service brake function as high as possible and to obtain a maximum possible redundancy, the control unit, used to control the motor-and-pump assembly comprises a logic module and a power module, which are arranged separately of each other.

Abstract: A piston pump (10) for a hydraulic consumer of an electronically controlled vehicle brake system, carries a stepped piston (50, 50?) and centers a sealing assembly (26, 26?) which is retained in an axial direction Ax by a step (52, 52?) on the stepped piston (50, 50?), on the one hand, and is retained by a spring cage (53, 53?), on the other hand. The stepped piston (50, 50?) includes a plane support (54, 54?) for plane support legs (55a,b,c; 55a,b,c?) of the spring cage (53, 53?) The stepped piston (50, 50?) includes radially inwards, with respect to the support (54, 54?), a stepped bore (56, 56?), with the bore (56, 56?) accommodating centering legs (57a,b,c; 57a,b,c?) of the spring cage (53, 53?). Coaxially as well as inside the stepped bore (56, 56?), a spring-loaded valve member (59, 59?) of a non-return valve is arranged.

Abstract: A pressure balanced supply valve for use in a vehicular braking system. A housing defines a first chamber, a second chamber, a first fluid conduit for connection to a master cylinder, a second fluid conduit for connection to a hydraulic pump, and a third fluid conduit connected between the first and second fluid conduits. The second fluid conduit communicates with both the first chamber and the second chamber. A valve seat is defined in the third fluid conduit. A movable valve element is movable to a first position sealing against the valve seat to prevent fluid flow between the first and second conduits through the third conduit, and to a second position permitting fluid flow between the first and second conduit through the third conduit. The movable valve element is exposed to pressures in both the first and second chambers so as to be pressure balanced in operation.

Abstract: A package designed for monitoring fluid pressure in a manifold includes one or more pressure transducers and a microprocessor incorporated into a package to form a single, modular fluid pressure sensing device. The transducers may be arranged on one or more substrates to allow direct connection between the transducers and pressure ports in the manifold or be disposed on supports having support ports that couple with the pressure ports to carry fluid to the transducers. The package provides pressure-sensing capabilities without requiring reconfiguration of the manifold itself.

Abstract: A vehicle roll control system for a vehicle having a pair of front wheels and a pair of rear wheels each rotatable on an axle, comprising a front hydraulic actuator attached to the front torsion bar; a rear hydraulic actuator attached to the rear torsion bar; and control means connected to the front and rear hydraulic actuators and controlling the operation thereof on detection of a predetermined vehicle condition; wherein each front and rear hydraulic actuator comprises a housing, a piston making a sealing sliding fit inside the housing to define a first fluid chamber and a second fluid chamber, and a piston rod connected to the piston and extending through the second fluid chamber and out of the housing; wherein the control means acts on detection of the predetermined vehicle condition to apply a fluid pressure to the first fluid chambers of the front and rear hydraulic actuators and to apply a fluid pressure to the second fluid chambers of the front and rear hydraulic actuators; and wherein the control mea

Abstract: An electronic control system for the compressor of a vehicle air braking system, the control system having one or more inputs indicative of a vehicle operating state, and an output for determining whether a compressor is on-load or off-load, the system further including target means to calculate in real time a target pressure for a reservoir downstream of said compressor, said output being responsive to said target means. The target pressure may be varied in real time to suit vehicle running conditions and permits a small but significant reduction in vehicle fuel consumption by driving the compressor when the vehicle is likely to be coasting or slowing down.

Abstract: In braking pressure control unit for a vehicle braking system, a space is formed, which is neighboring to electric brushless motors and arranged at ends of electromagnetic valves in a direction of a motor shaft of the electric motor. A printed circuit board for a motor driving circuit and a printed circuit board for a valve control circuit are arranged side-by-side in the space in the direction of the motor shaft. As a result, a longitudinal direction of the braking pressure control unit is suppressed to a small amount.

Abstract: In a braking pressure control unit for a vehicle braking system, an electric motor is arranged at one side of a hydraulic pressure control block, while electromagnetic valves and an electronic control unit are arranged at the other side of thereof. A connector portion to be connected with an external terminal and an accommodation space are formed in a casing of the braking pressure control unit, such that the connector portion and the accommodation space protrude outwardly from an outer periphery of the hydraulic pressure control block in a direction perpendicular to a direction of a motor shaft of the electric motor, and that the accommodation space is neighboring to the connector portion. And a large-sized electrical part included in a motor driving circuit is accommodated in the accommodation space.

Abstract: In a vehicular brake control system in which pressure upstream of a plurality of pressure increase control valves is variable, a brake control ECU sets a value of a current supplied to a solenoid coil in each of the pressure increase control valves in accordance with a physical quantity corresponding to a brake fluid pressure upstream of the pressure increase control valves, e.g., in accordance with a master cylinder pressure detected by a pressure sensor and an instruction current value for differential pressure control valves.