Abstract: A hydraulic braking system for a motor vehicle, including at least two brake circuits which each include at least one hydraulically actuatable wheel brake and at least one electrically operable pressure generator, the pressure generators being activatable as a function of a brake request of the motor vehicle or a driver of the motor vehicle. A respective electric actuator is assigned to each pressure generator for its operation, and at least one activatable emergency operation valve is interconnected between the brake circuits, which in a first switching position disconnects the brake circuits from one another and in a second switching position connects them to one another.

Abstract: An electropneumatic brake system, for a commercial vehicle which is provided for pulling a trailer, includes at least one service brake circuit configured to activate service brake actuators, a parking brake circuit having parking brake actuators on at least one axle, a trailer brake circuit configured to provide a trailer brake pressure at a trailer brake pressure port, and a manually actuatable operating unit in a driver's cab. The manually actuatable operating unit has a first operating element and a second operating element. In the case of actuation of the first operating element when the vehicle is driving, the parking brake actuators are activated and a trailer brake pressure is output at the trailer brake pressure port. In the case of actuation of the second operating element when the vehicle is driving, only a trailer brake pressure is output.

Abstract: A brake system (20) for a vehicle includes a brake unit (20A; 20B) having: a fluid reservoir (32) for containing a volume of brake fluid therein, an ECU (1000), and an electronically-controlled plunger device (60) operable to stroke in response to a control signal from the ECU (1000) to supply fluid pressure to at least one wheel cylinder (RL, RR) for vehicle braking. The plunger device (60) includes: a rod (108) coupled to an actuator (M), a primary seal (100) coupled to the rod (108) and arranged to seal against an inner wall of a plunger chamber, and a secondary seal (104) surrounding the rod (108) to seal an interface where the rod (108) exits the plunger chamber. A portion of the plunger chamber between the primary and secondary seals (100, 104) is coupled through a switchable valve (112) to the fluid reservoir (32).

Abstract: A braking control device includes a first adjustment unit, a master unit, a regenerative coordination unit, a first opening/closing valve, a second opening/closing valve, a reaction force hydraulic pressure sensor, an input hydraulic pressure sensor, a controller. The master unit includes a master cylinder and a master piston, a master chamber, a servo chamber, and a reaction force chamber. The regenerative coordination unit includes an input piston. The first opening/closing valve provided in a first fluid passage. The second opening/closing valve provided in a second fluid passage. The reaction force hydraulic pressure sensor detects a pressure in the reaction force chamber. The input hydraulic pressure sensor detects a pressure in the input cylinder.

Abstract: An embodiment provides an electric brake system including a hydraulic pressure supplier configured to produce hydraulic pressure of oil using rotation force of a motor; a hydraulic circuit configured to convey hydraulic pressure discharged from the hydraulic pressure supplier to a wheel cylinder; a motor position sensor configured to measure a position of the motor; a motor current sensor configured to measure a current of the motor; and a controller configured to determine whether there is a leak in the hydraulic circuit based on the measured position and current of the motor, and determine a circuit that has a leak based on the measured position and current of the motor when it is determined to have a leak in the hydraulic circuit.

Abstract: An electronically controllable pneumatic brake system includes a brake circuit, wherein a control valve is associated with the brake circuit for the purpose of adjusting braking pressures at service brakes independently of each other, wherein the control valve comprises an electronic control input for receiving an electrical control signal and a pneumatic control input for receiving a control pressure. The pneumatic brake system additionally includes a first control unit for outputting the electronic control signal depending on a target vehicle deceleration for the electrical actuation of the control valve, a first brake valve configured to specify a first brake valve control pressure, and a second brake valve configured to output a second brake valve control pressure. The second brake valve is disposed such that the first brake valve control pressure and/or the second brake valve control pressure is output as the control pressure to the control valve.

Abstract: An electric brake system is disclosed. The electric brake system controlling a hydraulic pressure delivered to a wheel cylinder provided at each of wheels according to a pedal effort of a brake pedal, includes a reservoir configured to store oil; a master cylinder including first and second hydraulic ports, each of which is connected to two wheels, and configured to generate a hydraulic pressure by the pedal effort of the brake pedal; a pedal simulator configured to provide a reaction force of the brake pedal by being connected to the master cylinder, and connected to the reservoir; a simulation valve installed at an oil flow path connecting the pedal simulator to the reservoir, or at an oil flow path connecting the master cylinder to the pedal simulator; a bypass flow path branching off from the oil flow path and connected to the reservoir; and a relief valve provided at the bypass flow path and configured to enable oil to flow when the simulation valve operates abnormally.

Abstract: A method pertaining to braking of a vehicle combination (100) which combination comprises a tractor vehicle (110) with a towed vehicle (112), where both are configured to be braked. The tractor vehicle (110) is provided with a first control unit (200) having a function for regulation of coupling force between the tractor vehicle (110) and the towed vehicle (112). Regulation of coupling force includes adaptation data and the towed vehicle bears an ID specification. The method includes the steps of: transferring the ID specification from the towed vehicle (112) to the tractor vehicle (110); during a braking process, registering adaptation data associated with the braking process together with the ID specification. Also a computer program product includes program code (P) for a computer (200; 205) for implementing the method. Also a system pertaining to braking of a vehicle combination (100) and to a vehicle combination (100) is equipped with the system.

Abstract: A hydraulic braking system and a method for operating the hydraulic braking system. The hydraulic braking system has a first pressure generating unit and a second pressure generating unit. The first pressure generating unit is hydraulically interruptibly and uncircumventably connected to the second pressure generating unit via a first interrupting element in such a way that with the first interrupting means in a closed position, a hydraulic connection between the first and second pressure generating unit is no longer possible.

Abstract: A Hill Start Assist (HSA) system for an off-road type vehicle includes a brake system for producing a braking force sufficient to maintain the vehicle in a stopped condition, and a control unit in communication with the brake system for controlling a brake modulator of the brake system to maintain the braking force when a manual brake actuator of the brake system is in a released position. The HSA system is operable in a ready state where the brake modulator is in an open condition and the braking force is not maintained, an activated state and a hold state where the brake modulator is in a closed condition and the braking force is maintained. The HSA system is only in the ready state upon determination by the control unit that predetermined vehicle conditions are satisfied.

Abstract: The invention relates to a brake system for motor vehicle. A piston-cylinder arrangement can be actuated by means of a brake pedal, a controllable pressure source and brake pressure modulation valves. In order to provide a piston-cylinder arrangement which is easy to implement and axially short, the invention proposes that the piston of the piston-cylinder arrangement is directly guided in a housing that accommodates further components of the brake system according to the invention.

Abstract: A method of controlling the braking of a tractor-trailer combination (10) in which the tractor (11) includes a drive train having an engine and at least one ground-engaging member (14, 16) driveably connected thereto via an adjustable-ratio transmission; at least one ground-engaging member (14, 16) of the tractor includes at least one tractor brake; and at least one ground-engaging member (17) of the trailer (12) includes at least one further, trailer brake, comprises the steps of determining (i) the deceleration of the tractor-trailer combination (10) resulting from braking effort applied via the tractor brake and/or (ii) the deceleration of the tractor-trailer combination resulting from engine braking. The method also includes establishing from one or both the said, determined decelerations as a target value in a control system a braking effort of the trailer brake that approximates the braking of the tractor-trailer combination (10) to the braking of the tractor (11) when considered alone.

Abstract: A hydraulic brake system includes: a hydraulic pressure source provided for a vehicle, and including a hydraulic-pressure generating device and a reservoir; a plurality of hydraulic brakes provided for respective wheels of the vehicle, and configured to restrain rotations of the respective wheels; and a control valve device including at least one hydraulic-pressure control valve group disposed between the hydraulic-pressure generating device and at least one of brake cylinders of the hydraulic brakes and/or between the reservoir and the at least one of the brake cylinders. Each of the at least one hydraulic-pressure control valve group includes (a) at least one ON/OFF control valve and (b) at least one linear control valve that are disposed in parallel with each other.

Abstract: Two pressure chambers of the master cylinder and brake cylinders provided respectively for front left and right wheels are respectively connected directly to each other by master passages. Provided respectively in the master passages are master cut-off valves each as a normally-closed electromagnetic open/close valve. As a result, when the brake pedal is not operated and when no current is supplied to solenoids of the respective master cut-off valves, the pressure chambers and the brake cylinders are respectively disconnected to each other, preventing an outflow of the working fluid from the pressure chambers, i.e., fluid chambers of a master reservoir to the brake cylinders.

Abstract: The electric brake system for vehicles includes a pressure supplier connected to a reservoir through a hydraulic passage to receive the oil, the pressure supplier outputting a brake will of a driver as an electric signal through the pedal displacement sensor, when the driver pushes the brake pedal, to operate a motor and convert a rotational force of the motor into linear motion, a hydraulic control unit including a first circuit including at least one first vehicle wheel and a second circuit including at least one second vehicle wheel to receive a hydraulic pressure with a force generated by the pressure supplier and thereby perform braking, a blocking valve to control the hydraulic pressure from the master cylinder to a wheel cylinder disposed in each vehicle wheel, a simulation device connected to the master cylinder, to provide a reaction force response to the pedal effort of the brake pedal, and an electronic control unit to control the motor and the valves, based on pressure information and pedal displa

Abstract: A brake system and a valve device for a brake system are provided which provide at least partial front brake actuation in the event of a failure in the front brake pneumatic supply circuit. The valve device may be configured as a biased orifice double check valve which permits compressed air flow from the front brake pneumatic supply circuit to a front brake actuator during normal brake operation, but in the event of lack of sufficient front brake pneumatic pressure permits compressed air to be supplied to the front brake actuator from a rear brake pneumatic supply circuit, as well as permitting compressed air in the front brake actuator to be ventilated back through the rear brake pneumatic supply circuit when the brake is released.

Abstract: A vehicle hydraulic brake system of the brake-by-wire type includes input piston and a master piston configured to be actuated under hydraulic pressure introduced into a second fluid chamber and mounted in the housing so as to be movable relative to each other through a partition wall and a first fluid chamber. The piston defines therein a communication passage which extends from a fourth fluid chamber to the first fluid chamber and in which a check valve is mounted. When the piston is advanced under hydraulic pressure introduced into the second fluid chamber, the volume of the fourth fluid chamber decreases, while the volume of the first fluid chamber increases. This allows brake fluid in the fourth fluid chamber to be quickly released into the first fluid chamber through the communication passage and through a pipe line in which an electromagnetic on-off valve are mounted.

Abstract: A hydraulic brake system includes: a master cylinder including a pressurizing piston; a brake cylinder for a hydraulic brake operable by a hydraulic pressure in a front pressure chamber defined in front of the pressurizing piston; and a rear-hydraulic pressure controller connected to a rear chamber defined at a rear of the pressurizing piston. The rear-hydraulic pressure controller controls a hydraulic pressure in the rear chamber and includes: a regulator, operable by at least one of the hydraulic pressure in the front pressure chamber and a control pressure controlled electrically, for supplying an output hydraulic pressure to the rear chamber; and a master-pressure-operating-state detector configured to, when the output hydraulic pressure is greater than a threshold value, detect that the regulator is in a master-pressure operating state in which the regulator is operated by at least the hydraulic pressure in the front pressure chamber.

Abstract: Exemplary embodiments of the present invention relate to an electronic hydraulic brake device, including: a pedal cylinder configured to generate an oil pressure by a pressure of a pedal; a master cylinder configured to generate the oil pressure by sensing the pedal; wheel cylinders configured to be each mounted at a plurality of wheels and provide a braking force to the wheels; a storage configured to store a fluid; a mixing circuit configured to connect the pedal cylinder to some of the wheel cylinders, and communicate with the storage and the master cylinder; a master circuit configured to connect the master cylinder to the wheel cylinder and communicate with the storage; and a hydraulic compartment configured to connect the mixing circuit to the master circuit and limit a movement of the fluid.

Abstract: A braking system in a hybrid vehicle is provided. The braking system includes a master cylinder having a first outlet, a second outlet, and a piston disposed therein and translatable from a proximal end to a distal end in response to brake pedal displacement. A brake fluid reservoir supplies hydraulic fluid to the master cylinder. A first fluid circuit connects the first outlet of the master cylinder to the brake fluid reservoir. A second fluid circuit connects the second outlet of the master cylinder to wheel brakes and supplies hydraulic fluid from the master cylinder to the wheel brakes in response to brake pedal displacement. The first outlet of the master cylinder is disposed between the second outlet and the proximal end of the master cylinder such that initial brake pedal displacement transfers brake fluid from the master cylinder to the fluid reservoir to inhibit hydraulic braking during regenerative braking.

Abstract: A method for operating a brake system for a vehicle, the brake system including a master brake cylinder coupled to an electromechanical brake booster having a booster body. The method involves: From an initial position, displacing the booster body relative to the master brake cylinder by an adjusting travel in the direction towards the master brake cylinder into an end position; from the end position, displacing the booster body relative to the master brake cylinder by the same adjusting travel in an opposite direction away from the master brake cylinder back into the initial position; during the step of displacing the booster body from the end position back into the initial position, sucking hydraulic fluid from wheel brake devices that coupled in a fluid manner with the brake system and assigned to wheels of the vehicle, for the reduction of a hydraulic fluid pressure existing in the wheel brake devices.

Abstract: A braking system for a vehicle includes: a brake input element for an actuation to input a brake pressure signal by a driver; a brake master cylinder coupled to the brake input element and supplied with hydraulic fluid from a hydraulic fluid reservoir fluidically connected to the brake master cylinder; and a first brake circuit. The first brake circuit has: a switchover valve with controllable through flow rate for the hydraulic fluid; a pressure regulating valve with controllable through flow rate for the hydraulic fluid; a hydraulic pump for optionally building up an elevated hydraulic fluid pressure in the first brake circuit; at least one first wheel brake cylinder exerting a braking torque on a first vehicle wheel coupled to the wheel brake cylinder; and a first fluid line from the hydraulic fluid reservoir being fluidically connected to the pressure regulating valve and to the hydraulic pump.

Abstract: A hybrid or electric vehicle includes a hydraulic brake system having an active vacuum booster with an active boost control valve actuated by at least one controller. An isolation valve is disposed in a fluid circuit that fluidly connects a master cylinder to hydraulic brakes. A brake pedal is capable of moving in an initial deadband displacement range when initially depressed by an operator of the vehicle. While in the initial deadband displacement range, the controller selectively activates the isolation valve to inhibit fluid flow from at least a portion of the fluid circuit to the master cylinder based at least upon an operating state of the active boost control valve.

Abstract: A brake system includes a plunger assembly for actuating wheel brakes during a normal brake apply. The plunger assembly includes a motor mounted on the housing for driving an actuator. A first piston is connected to the actuator. The first piston is slidably mounted within the housing for pressurizing a first fluid chamber in the housing. A second piston is slidably mounted within the housing for pressurizing a second fluid chamber in the housing. A pump-less control valve arrangement includes a first control valve regulating the flow of fluid between a first fluid chamber and the first wheel brake. A second control valve regulates the flow of fluid between a second fluid chamber and the second wheel brake. An isolation valve arrangement switches the brake system between the normal braking mode and the manual push-through mode.

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: The brake actuator includes a housing, a differential pressure control valve, pressure increase control valves, a reservoir, pressure decrease control valves, a pump, an intake system pipeline, and a check valve. The differential pressure control valve is provided in a main pipeline divided into first and second pipelines. The check valve is included in a communication path formed within the housing. The check valve includes a cylindrical pipe member with a hollow portion and an opening portion. A valve body is disposed on the outer circumference of the pipe member. A first path configuring a portion of the intake system pipeline is formed in the pipe member. In the communication path, a gap configuring a portion of the second pipeline is formed outside the pipe member. The check valve allows brake fluid to flow from the first pipeline to the second pipeline through the pipe member and the opening portion.

Abstract: In a hydraulic brake system including a cylinder device that includes a front chamber and a rear chamber located on front and rear sides of a pressurizing piston, respectively, presence or absence of liquid leakage from a brake line is detected based on a hydraulic pressure in the rear chamber. Where a state in which a subtraction value obtained by subtracting an actual rear hydraulic pressure from a target rear hydraulic pressure is larger than a first malfunction determination threshold value has continued for a time not shorter than a first malfunction determination time, and then an increase of the actual rear hydraulic pressure at a rate not lower than a set rate has caused the subtraction value to become smaller than a return determination threshold value, it is determined that the pressurizing piston has been bottomed due to liquid leakage from the front chamber.

Abstract: A vehicular hydraulic braking pump includes a sleeve having an inner bore defining an inner bore surface and a piston having a stop collar and a ramped seal face. The stop collar, ramped seal face, and the inner bore cooperating to define a seal pocket which traps a high pressure seal therein. The ramped seal face provides contact of the high pressure seal to the sleeve inner bore that is proportional to fluid pressure acting on the high pressure seal.

Abstract: A brake booster for use in a hydraulic braking system having a brake pedal, a master cylinder, and a hydraulic control unit includes a housing, a screw drive arrangement positioned at least partially in the housing, a motor coupled to the housing for actuating the screw drive arrangement, and a piston assembly positioned in the housing. The piston assembly and the housing together at least partially define a first fluid chamber having an opening for providing fluid communication with the master cylinder, and a second fluid chamber having an opening for providing fluid communication with the hydraulic control unit. The screw drive arrangement is movable relative to a piston of the piston assembly between an engaged position, in which the first fluid chamber is isolated from the second fluid chamber, and a disengaged position in which the first fluid chamber is not isolated from the second fluid chamber.

Abstract: Disclosed herein is an electric brake system for a vehicle including a reservoir, an input rod, and a pedal displacement sensor to sense a displacement of a brake pedal. The electric brake system includes a pressure supply unit connected to the reservoir and a hydraulic channel and to output an electrical signal through the pedal displacement sensor, a hydraulic control unit provided with a first circuit and a second circuit, a shut-off valve to control the hydraulic pressure transferred to a wheel cylinder, a switching valve connected to a channel connecting the pressure supply unit to the hydraulic control unit, a compliance unit installed in a channel connected to the shut-off valve and the switching valve and including a compliance chamber, a piston and an elastic member, a simulator connected to the master cylinder to provide reaction force, and an electronic control unit to control the motor and the valves.

Abstract: A pneumatic vehicle brake system includes first and second groups of wheel brakes belonging, respectively, to first and second brake circuits having first and second compressed air storage tanks for providing first and second stored pressures. At least one first circuit brake cylinder is a combined spring-store/diaphragm cylinder with a spring store part for providing a parking brake and a diaphragm part for providing a service brake. If the first circuit fails, the spring store part is deaerated to engage the parking brake. A pressure sensor for measuring the first stored pressure is connected to a control unit that controls a modulator for aerating and deaerating the spring store part. The control unit generates a signal for an electrically actuatable modulator solenoid valve if the value measured by the sensor falls below a minimum value, such that the spring store part can be aerated and deaerated via the valve.

Abstract: A braking apparatus for work machines has at least two brakes, each having at least one braking circuit. The braking circuits can each be actuated via at least one control valve, and the control valves can be controlled independently of one another. A processing unit, by which the control valves can be controlled or regulated, an operating circuit, via which the braking circuits can be controlled or regulated manually, and at least one pressure supply are provided, and the control valves can be controlled or regulated under predetermined conditions by the processing unit.

Abstract: Disclosed herein is a brake system capable of reducing periodic pressure pulsation generated by operation of a pump. The brake system includes a damper member provided with a cylinder having a step portion and a piston to reciprocate between the cylinder and the cap. The piston may be prevented from being excessively pushed toward one side of the damper member, and pressure pulsation generated by operation of the pump may be attenuated. Therefore, overall operating noise may be reduced during control the brake and product reliability may be increased.

Abstract: A brake control apparatus includes: a fluid storing section for storing a quantity of brake fluid that is flown out of a master cylinder by driver's braking operation; pressure-increasing control valves each of which is disposed between the master cylinder and a corresponding one of wheel cylinders; a master cylinder pressure reduction control valve disposed in a fluid passage connected between the master cylinder and the fluid storing section. A hydraulic pressure control section is configured to perform a control operation when a braking force is being controlled with a regenerative braking system, wherein the control operation includes: controlling at least one of the pressure-increasing control valves toward closed state; controlling the master cylinder pressure reduction control valve toward open state; and allowing the quantity of brake fluid to flow into the fluid storing section.

Abstract: In a hydraulic unit of a vehicle brake system having a first pump element, which is assigned to a first brake circuit, and a second pump element, which is assigned to a second brake circuit, the second pump element has a different delivery from the first pump element.

Abstract: A vehicle brake system has a plurality of hydraulic brake circuits via which wheel brake units are supplied with brake pressure. At least one wheel brake unit is connected to at least two brake circuits and supplied with brake pressure via these two brake circuits.

Abstract: A braking system includes a brake pressure provision device for providing brake pressure using a brake medium; a brake pressure compensation device; a wheel brake circuit including a wheel brake cylinder for braking a wheel, the wheel brake circuit being connected via a first actuator to the brake pressure provision device and via a second actuator to the brake pressure compensation device; and a control unit for controlling the actuators and the brake compensation device in such a way that the volume of the brake medium is adapted to a desirable brake pressure in the wheel brake circuit as a function of a predefined parameter, the brake pressure in the wheel brake circuit being reduced with the aid of the brake pressure compensation device and by opening the second actuator and closing the first actuator.

Abstract: A brake device for a vehicle is provided in which when a slave cylinder generates a brake fluid pressure that is commensurate with the actual amount of operation of a brake pedal by a driver in a state in which a master cut valve is closed and a fluid path connecting a master cylinder to the slave cylinder is cut off, a wheel cylinder is actuated by the brake fluid pressure. Since deterioration determination means determines a leak in the downstream of the slave cylinder based on the actual amount of actuation of the slave cylinder detected by a slave cylinder stroke sensor and the actual brake fluid pressure generated by the slave cylinder and detected by a fluid pressure sensor, it is possible to rapidly determine a leak in the downstream of the slave cylinder.

Abstract: An electric motor system that triggers brake and steering function upon engine failure featuring an electric motor; and a vacuum pump, an oil pump, and a sensor each operatively connected to the electric motor. The vacuum pump is connected to the vehicle's brake servo and the oil pump is connected to an oil reservoir and to the vehicle's steering sector. The sensor is adapted to detect when the engine is turned off. When the engine is turned off the sensor is activated and causes activation of the electric motor. Activation of the electric motor causes activation of the vacuum pump and the oil pump. The vacuum pump functions to provide a vacuum in the servo brake of the vehicle and the oil pump functions to create oil pressure with oil in the oil reservoir and direct oil pressure to the steering sector.

Abstract: Disclosed is an integrated electronic hydraulic brake system including an integrated hydraulic control device including a master cylinder having two hydraulic circuits to generate hydraulic pressure, a reservoir coupled to an upper part of the master cylinder to store oil, an accumulator to store a predetermined level of pressure, flow control valves and pressure reducing valves to control pressure transmitted from the accumulator to wheel cylinders installed at wheels of a vehicle, a pedal simulator connected to the master cylinder to provide reaction force of the brake pedal, and a simulation valve to control connection between the master cylinder and the pedal simulator and a power source unit including a pump to suction oil from the reservoir and discharge the suctioned oil to the accumulator to generate pressure in the accumulator and a motor to drive the pump, wherein the power source unit is configured as a separate unit to remove noise generated from the power source unit, and the integrated hydraulic

Abstract: Disclosed is an electro-hydraulic brake system including a master cylinder to generate hydraulic pressure according to pedal force applied to a brake pedal, a reservoir provided at an upper portion of the master cylinder to store oil, an intermediate pressure accumulator to store hydraulic pressure, a first motor and a first pump to suction oil through a channel connected to the reservoir and discharge the suctioned oil to the accumulator to create hydraulic pressure in the intermediate pressure accumulator in braking, a second motor and a second pump provided at an output side of the intermediate pressure accumulator to increase responsiveness in braking, two hydraulic circuits, each of the hydraulic circuits being connected to two wheels, and a flow control valve and a pressure reducing valve provided between the intermediate pressure accumulator and the two hydraulic circuits to control pressure transmitted from the intermediate pressure accumulator to a wheel cylinder installed at each of the wheels.

Abstract: A hydraulic vehicle brake system, preferably a slip-controlled hydraulic vehicle brake system, includes two brake circuits to which wheel brakes of front wheels are attached. The brake system further includes an additional brake circuit, which is not attached to the main brake cylinder, but is provided with a hydraulic pump for power braking. Wheel brakes of vehicle wheels are attached to the additional brake circuit and are configured to be driven by an electric motor. The electric motor is operated as a generator during a braking operation to compensate for the braking moment generated in the additional brake circuit.

Abstract: There is provided an initial flow increasing module. The initial flow increasing module is connected with an electronic stability control (ESC) system having a first hydraulic channel and a second hydraulic channel each for controlling a liquid pressure transmitted to two wheels, and includes a hydraulic circuit that includes a pressure source in which oil is stored so as to increase a braking initial flow and a flow control valve connected with the pressure source so as to control a flow of oil transmitted to a wheel brake provided in each wheel from the pressure source.

Abstract: Two pressure chambers of the master cylinder and brake cylinders provided respectively for front left and right wheels are respectively connected directly to each other by master passages. Provided respectively in the master passages are master cut-off valves each as a normally-closed electromagnetic open/close valve. As a result, when the brake pedal is not operated and when no current is supplied to solenoids of the respective master cut-off valves, the pressure chambers and the brake cylinders are respectively disconnected to each other, preventing an outflow of the working fluid from the pressure chambers, i.e., fluid chambers of a master reservoir to the brake cylinders.

Abstract: Disclosed is an integrated electronic hydraulic brake system including an actuator having a master cylinder and a pedal simulator, electronic stability control (ESC), and hydraulic power unit (HPU) which are configured as a single unit.

Abstract: A mechanical pressurization device is connected to a common passage, and brake cylinders provided respectively for front left and right and rear left and right wheels are connected to the common passage respectively via pressure holding valves. Each of the pressure holding valves in the front is a normally open valve, and each of the pressure holding valves in the rear is a normally closed valve. In the event of an abnormality in which a hydraulic pressure in the common passage cannot be controlled using a hydraulic pressure produced by a power hydraulic pressure source, a hydraulic pressure in the mechanical pressurization device is supplied to the front brake cylinders provided respectively for the front left and right wheels.

Abstract: The invention relates to an hydraulic unit for a motor vehicle brake system which operates according to the feedback principle, for which purpose a low-pressure accumulator is provided between the outlet valves of the wheel brakes and a pump, and the piston of which low-pressure accumulator, in the basic position, disconnects the hydraulic connection between a pressure medium chamber and a connection leading to the pump such that, in the empty state of the low-pressure accumulator, the wheel brakes are reliably disconnected from the suction side of the pump.

Abstract: An integrated electronic hydraulic brake system provided with an actuator including a master cylinder and a pedal simulator, an electronic stability control (ESC) and a hydraulic power unit (HPU) in a single unit.

Abstract: A valve device for brake control of a different pressure medium-operated vehicle brake systems comprises a housing that has pressure medium ducts. A relay valve provides a pneumatic control pressure, which is fed to the relay valve via at least one of the pressure medium ducts at a higher flow rate. At least one insert is pneumatically connected to at least two of the pressure medium ducts, which can be pneumatically connected to each other by the insert. The two pressure medium ducts define a pressure medium path, the profile of which differs based on the housing that is in each case selected and/or switched based on the selected insert. The housing is selected from a set of housings having different pressure medium ducts, in particular bores, but which are otherwise essentially similar. The insert is selected from a set of different inserts.

Abstract: The electric brake system for vehicles includes a pressure supplier connected to a reservoir through a hydraulic passage to receive the oil, the pressure supplier outputting a brake will of a driver as an electric signal through the pedal displacement sensor, when the driver puts the brake pedal, to operate a motor and convert a rotational force of the motor into linear motion, a hydraulic control unit including a first circuit including at least one first vehicle wheel and a second circuit including at least one second vehicle wheel to receive a hydraulic pressure with a force generated by the pressure supplier and thereby perform braking, a blocking valve to control the hydraulic pressure from the master cylinder to a wheel cylinder disposed in each vehicle wheel, a simulation device connected to the master cylinder, to provide a reaction force response to the pedal effort of the brake pedal, and an electronic control unit to control the motor and the valves, based on pressure information and pedal displace