Abstract: A control apparatus for a linear solenoid valve configured to regulate a hydraulic pressure in a vehicle transmission. The control apparatus includes a hydraulic control portion configured to output a control command signal that is applied to a solenoid of the linear solenoid valve. The hydraulic control portion outputs, as the control command signal, a regulating control command signal by which the hydraulic pressure is to be regulated to a regulated pressure value that is dependent on a vehicle driving state. When the regulated pressure value is in a certain pressure range in which vibration-based noise is likely to be generated by vibration of the linear solenoid valve that is operated with the regulating control command signal being applied to the solenoid, the hydraulic control portion outputs, as the control command signal, a noise-restraining command signal by which generation of the vibration-based noise is restrained.

Abstract: The present invention relates to a method for avoiding excess pressures in a pressure medium circuit of an electronically slip-controllable braking system in the event of a decline of an intrinsic elasticity of the braking system and an electronically slip-controllable braking system. Electronic control units, ascertain a setpoint value for a delivery volume of the pressure generator of these braking systems and convert it into an activation signal for the drive of the pressure generator. In dependence on the prevailing elasticity of the pressure medium circuit, a pressure gradient is established, using which the pressure in the pressure medium circuit changes over time. The ascertainment of an activation signal for the drive of the pressure generator by the electronic control unit is based on the established pressure gradient.

Abstract: A brake system has a wheel brake and is operable under a non-failure normal braking mode and a manual push-through mode. The system includes a master cylinder operable by a brake pedal during a manual push-through mode to provide fluid flow at an output for actuating the wheel brake. A first source of pressurized fluid provides fluid pressure for actuating the wheel brake under a normal braking mode. A secondary brake module includes a plunger assembly for generating brake actuating pressure for actuating the wheel brake under the manual push-through mode.

Abstract: A method for controlling a hydraulic braking system of a vehicle. The braking system includes a controllable first braking pressure generator and a sensor for a deceleration signal of the vehicle. The method includes: impressing a pressure characteristic with the aid of the first braking pressure generator on an original setpoint braking pressure; and monitoring the deceleration signal for the presence of a deceleration characteristic corresponding to the pressure characteristic.

Abstract: A servo brake cylinder for a distributed brake system with an electric motor, a ball screw assembly with a lead screw and a nut, a piston, a cylinder body is disclosed. The electric motor is connected to the ball screw assembly. The piston is installed in the hollow inner space of the cylinder body, slidable axially. The piston has a hole at the center formed by three sections of surfaces including a first cone surface, a cylindrical surface a second cone surface. One end of the lead screw is connected with the nut, and the other end at the tip of the lead screw has three sections of surfaces including a gradually constricting cone surface from the tip followed by a cylindrical surface, further followed by a gradually expanding cone surface. These surface sections at the lead screw and the three sections of the surfaces at the hole of the piston form an inlet valve and an outlet valve between the piston and the lead screw.

Abstract: A brake operating device in which an operation of a brake pedal can be detected easily by a simple structure is provided. The brake operating device 1 comprises: a pusher 19, 20 connected to a brake pedal 2; a hydraulic system 5 in which fluid is held between the pusher 19, 20 and a pushing element 27 to transmit a thrust force of the pusher 19, 20 to the pushing element 27; a first elastic mechanism 23a, 23b that establishes an elastic force to isolate the pusher 19, 20 away from the pushing element 27; a cylinder 18 holding the pusher 19, 20 while restricting a withdrawal limit of the pusher 19, 20 in a direction away from the pushing element 27; and a second elastic mechanism 37 that is arranged at a position to push the cylinder 18, and that establishes an elastic force against the elastic force in the direction to isolate the pusher 19, 20 away from the pushing element 27.

Abstract: An actuation system, in particular for a vehicle brake, may include an actuating device, such as a brake pedal, at least one first pressure source, e.g., a piston-cylinder unit (master cylinder), which can be actuated in particular by means of the actuating device and a second pressure source, in particular a piston-cylinder unit, with an electro-mechanical drive. The pressure sources may each be connected to at least one brake circuit via a hydraulic line, in order to supply the brake circuit with pressurising medium and to pressurise the vehicle brake. There may further be a valve device for regulating the brake pressure. It is planned that during forward and return stroke at least one brake circuit can be fed controlled pressurising medium by way of the second pressure source.

Abstract: Systems and methods for cancelling brake torque variation in a motor vehicle are disclosed. Signals indicative of brake torque variation are received at a controller. Based on the signals, a frequency associated with the indicated brake torque variation is determined. At least one of an output time and output volume of pressurized brake fluid is adjusted based on the frequency to cancel the indicated brake torque variation.

Abstract: A brake operating device to improve a brake feeling by a simple structure without a hydraulic source or an electric power source. A first reaction force establishing mechanism as an elastic member establishes the reaction force against the pedal force applied to the brake pedal. A second reaction force establishing mechanism increases the reaction force when depressing the brake pedal. The first reaction force establishing mechanism and the second reaction force establishing mechanism are arranged coaxially in series.

Abstract: A control device for a brake system of a vehicle includes an electronic device configured to perform a method including determining, taking into account a specified braking of a driver of the vehicle or of an automatic control system of the vehicle, a first item of information regarding a current usability of a hydraulic device of the brake system and a second item of information regarding a current usability of a brake booster of the brake system, which first target portion of a brake pressure increase is to be provided by the hydraulic device, and which second target portion of the brake pressure increase is to be provided by the brake booster, and controlling the hydraulic device and/or the brake booster so that the first target portion of the brake pressure increase is provided by the hydraulic device and the second target portion is provided by the brake booster.

Abstract: As system for vehicle braking includes: a pedal actuated valve, including a first vent outlet in fluid communication with a fluid sink, a first supply inlet in fluid communication with a fluid source, and a first delivery outlet in fluid communication with a load; an electronically controlled valve in parallel with the pedal actuated valve, including a second vent outlet connected to the fluid sink via the first vent outlet, a second supply inlet in fluid communication with the fluid source, and a second delivery outlet in fluid communication with the load; and, a check valve connected between the load and the first delivery outlet downstream of the second vent outlet. A method for vehicle braking includes: operating at least one of the pedal actuated valve and the electronically controlled valve.

Abstract: A brake control apparatus includes: a master cylinder that outputs a brake fluid at a master pressure; a master pressure changing device that is configured to change the master pressure irrespective of an operation of a brake pedal; a brake actuator; and a control unit that executes vehicle stability control by changing a brake pressure of a target wheel. Modes of the vehicle stability control include a normal mode and a pseudo mode. In the pseudo mode, the control unit operates the master pressure changing device such that the master pressure obtains a target value of the brake pressure of the target wheel, and changes the brake pressure of the target wheel in an interlocking manner with the master pressure. When the normal mode is unavailable, the control unit executes the vehicle stability control in the pseudo mode.

Abstract: A vehicle brake device provided with a hydraulic pressure generating portion, an actuator and a controlling portion which maintains a driving force of the driving portion when a control subject pressure in a control subject chamber is within a dead zone, wherein the control subject pressure varies in response to a variation of the master pressure and a pulsation is generated in the master pressure accompanying an operation of the actuator. The vehicle brake device further includes a rigidity information obtaining portion which obtains a rigidity information and a dead zone setting portion which sets the dead zone based on the rigidity information obtained by the rigidity information obtaining portion such that the higher the rigidity of the control subject chamber, or the higher the probability of rigidity increase of the control subject chamber, the wider the dead zone is set.

Abstract: A pedal operation amount detection apparatus comprising: a transmitting member that transmits a pedal operation force; a movement lever disposed so as to be movable with respect to the transmitting member; a sensor rod disposed so as to be connected to the transmitting member and the movement lever; and a deformable body that is disposed on the transmitting member and is deformed when the pedal operation force or a reaction force corresponding to the pedal operation force is transmitted from the movement lever to the deformable body, the pedal operation amount detection apparatus electrically detecting a pedal operation amount based on deformation of the deformable body, the sensor rod extending through both the movement lever and the deformable body, the pedal operation amount detection apparatus further comprising: a first locking portion provided at an end portion of the sensor rod on a side where the sensor rod protrudes from the deformable body; a second locking portion provided at an intermediate portio

Abstract: A braking system includes a master cylinder including a master cylinder output, at least one wheel cylinder, a shuttle valve including a shuttle, a volume booster distinct from the master cylinder, a first hydraulic fluid path connecting the master cylinder output to the at least one wheel cylinder through the volume booster and the shuttle valve and a second hydraulic fluid path connecting the master cylinder output to the at least one wheel cylinder through the shuttle valve, bypassing the volume booster. Only one of the first hydraulic fluid path or the second hydraulic fluid path is operable at any one time.

Abstract: The system is provided with a controller that controls the acceleration and deceleration of the vehicle according to the operation quantity of an accelerator pedal, and a state detector that determines whether a wheel is in a slippery state. The controller sets a deceleration region corresponding to a relatively small amount of operation and an acceleration region corresponding to a relatively large operation quantity regarding the operation quantity, and controls such that, in at least partially, the deceleration of the vehicle is increased as the operation quantity decreases, while in at least a part of the acceleration region, the acceleration of the vehicle is increased as the operation quantity increases. When the state detector detects a slippery state, the controller decreases the maximum deceleration that can be produced in the deceleration region.

Abstract: A pressure regulator configured to regulate a pressure of a working fluid by two pilot pressures, including: a spool valve mechanism having a spool; a first biasing mechanism configured to bias the spool toward the other end of the pressure regulator in its axial direction by a first pilot pressure in a first-pilot-pressure chamber; a second biasing mechanism configured to bias the spool toward the other end of the pressure regulator by a second pilot pressure in a second-pilot-pressure chamber; and a counter biasing mechanism configured to bias the spool toward one end of the pressure regulator by a pressure of the working fluid in a regulated-pressure chamber, wherein the counter biasing mechanism has a counter biasing piston configured to push the spool toward the one end of the pressure regulator by the pressure of the working fluid in the regulated-pressure chamber applied to the counter biasing piston.

Abstract: A vehicle travel control apparatus includes: a detection part that detects an operation state of an accelerator pedal by a driver; an automatic travel control part that performs an automatic travel control in which a vehicle is automatically stopped according to a predetermined condition and independent of the operation of the driver; and an erroneous start limitation control part that limits a drive amount when the vehicle is started according to the operation state of the accelerator pedal detected by the detection part, wherein the erroneous start limitation control part decreases the degree of limitation of the drive amount when the vehicle is started in a case where the vehicle is automatically stopped according to the automatic travel control compared to a case where the vehicle is stopped according to the operation of the driver.

Abstract: A vehicle brake system includes a brake pedal unit (BPU) coupled to a vehicle brake pedal and including an input piston connected to operate a pedal simulator during a normal braking mode, and coupled to actuate a pair of output pistons during a manual push through mode. The output pistons are operable to generate brake actuating pressure at first and second outputs of the BPU. A hydraulic pressure source for supplying fluid at a controlled boost pressure is included. The system further includes a hydraulic control unit (HCU) adapted to be hydraulically connected to the BPU and the hydraulic pressure source, the HCU including a slip control valve arrangement, and a switching base brake valve arrangement for switching the brake system between the normal braking mode wherein boost pressure from the pressure source is supplied to first and second vehicle brakes, and the manual push through mode wherein brake actuating pressure from the BPU is supplied to the first and second vehicle brakes.

Abstract: A method for operating an electromechanical brake booster of a braking system including: establishing a virtual setpoint brake pressure variable; and establishing a setpoint differential travel variable with respect to a setpoint differential travel at least by: establishing a first intermediate value while taking into consideration a first weighting relation and a minimum from a first value set including the virtual setpoint brake pressure variable and a jump-in pressure variable; and establishing a second intermediate value while taking into consideration a second weighting relation and a maximum from a second value set including zero and a value of a difference using the virtual setpoint brake pressure variable as the minuend and the jump-in pressure variable as the subtrahend. A method for operating a recuperative braking system is also provided.

Abstract: A hydraulic-pressure control device includes a regulator including a housing, a control piston in the housing, an input chamber at a rear of the piston, and an output chamber in front of the piston; and an input-hydraulic-pressure control device which controls hydraulic pressure in the input chamber to move the piston forward or backward to raise or reduce hydraulic pressure in the output chamber. The input-hydraulic-pressure control device includes a moving-direction control unit which, when a difference obtained by subtracting an actual hydraulic pressure in the output chamber from a target hydraulic pressure in the output chamber is less than a pressurization-side set value, controls the hydraulic pressure in the input chamber to move the piston backward; and when the difference is greater than a reduction-side set value, controls the hydraulic pressure in the input chamber to move the piston forward.

Abstract: A motor vehicle braking system and method operable in a brake-by-wire mode and independently of the driver, with a master brake cylinder (2) operated by a brake pedal (1) having a piston (15, 16) and a pressure chamber (17, 18), connected with a brake circuit (I, II) and wheel brakes (8,9, 10, 11). An electrically controllable pressure supplying device (5) operates the wheel brakes; and a simulation device (3) with at least one elastic element (33), provides an acceptable brake pedal feel in the brake-by-wire mode. The simulation device (3) has a simulator chamber (29) connected, or is hydraulically connected, through a first hydraulic connection (54) to the pressure chamber (17) and which has an electrically actuated isolation valve (28) with a pressure means reservoir (4) under atmospheric pressure. A media separator device (47) is arranged in the connection (46) between the simulator chamber (29) and the isolation valve (28).

Abstract: A braking method for a motor vehicle including a hybrid or electric propulsion system, a hydraulic braking system, an electric braking system recuperating electrical energy, a brake pedal, systems to assist with driving of the vehicle, and a vehicle electronic stability control system. The method includes: selecting one of torque setpoints from between a pedal torque setpoint relating to position of or force supplied to the brake pedal, and a torque setpoint relating to the driver assistance systems; formulating a hydraulic braking torque setpoint independent of a state of the pedal by the electric or hybrid propulsion system; acquiring information relating to stability of the vehicle; formulating a hydraulic braking torque setpoint and an electric braking torque setpoint intended for the hybrid or electric propulsion system based on the selected torque setpoint, the independent hydraulic braking torque setpoint, and the information relating to the vehicle stability.

Abstract: This sensor state determination system is a sensor state monitoring system capable of accurately determining whether or not a detecting sensor used with a railroad vehicle is in an abnormal state. This system includes: a detecting sensor capable of detecting a physical value acting upon the railroad vehicle; and an electronic control device. A monitoring sensor equivalent to the detection sensor is installed at a position equivalent to the position of the detection sensor. The electronic control device is provided with a determination means (coherence calculation section, state determination section) that computes, based on a first signal detected by the detecting sensor and a second signal detected by the monitoring sensor, a coherence value indicating a correlation between the signals. The electronic control device determines that the detecting sensor is in an abnormal state if the coherence value is smaller than a preset abnormality determination value.

Abstract: The brake system includes a pedal, a pedal simulator, and a brake pedal unit. The brake pedal unit includes an input piston connected to the brake pedal for operating the pedal simulator during a normal braking mode. The brake pedal unit further includes first and second output pistons actuated by the input piston during a manual push through mode such that the first output piston generates brake actuating pressure at a first output of the brake pedal unit, and the second output piston generates actuating pressure at a second output of the brake pedal unit. The brake system further includes a hydraulic pressure source for supplying fluid at a controlled boost pressure, and a hydraulic control unit adapted to be hydraulically connected to the brake pedal unit and the hydraulic pressure source.

Abstract: In a control device for a brake system of a vehicle, given an actuation of a brake actuating element, a buildup of brake pressure is prevented at least in a first wheel brake caliper of a first brake circuit, a first wheel inlet valve of the first wheel brake caliper being controlled to a partly open state, and a first wheel outlet valve of the first wheel brake caliper being kept in a partly open state, a second wheel inlet valve of a second wheel brake caliper of the first brake circuit being controlled to a partly open state, and a second wheel outlet valve of the second wheel brake caliper being controlled to a closed state, in such a way that a brake pressure can be built up in the second wheel brake caliper.

Abstract: A hydraulic valve suitable for operating apparatus (500) of brakes of wheels of a vehicle includes body means (2) having first inlet means (21), second inlet means (22) that are connected to respective supply apparatus (23; 24) of pressurized fluid, first outlet means (25) and second outlet means (26); first distributing means and second distributing means (5) arranged to connect the first inlet means (21) to the first outlet means (25) and second inlet means (22) to the second outlet means (26) respectively, first thrust means (7) and second thrust means (8) arranged to operate the first distributing means (5) and second distributing means (6) respectively, and a hydraulic connection between said first distributing means (5) and second distributing means (6) so that the first distributing means (5) act on the second distributing means (6) and vice versa.

Abstract: A vehicle brake system includes a brake pedal unit (BPU) coupled to a vehicle brake pedal and including an input piston connected to operate a pedal simulator during a normal braking mode, and coupled to actuate a pair of output pistons during a manual push through mode. The output pistons are operable to generate brake actuating pressure at first and second outputs of the BPU. A hydraulic pressure source for supplying fluid at a controlled boost pressure is included. The system further includes a hydraulic control unit (HCU) adapted to be hydraulically connected to the BPU and the hydraulic pressure source, the HCU including a slip control valve arrangement, and a switching base brake valve arrangement for switching the brake system between the normal braking mode wherein boost pressure from the pressure source is supplied to first and second vehicle brakes, and the manual push through mode wherein brake actuating pressure from the BPU is supplied to the first and second vehicle brakes.

Abstract: In an electric braking device that produces brake fluid pressure by driving a second slave piston in the axial direction with the driving force by a motor, a driving force transmission mechanism for transferring the driving force by the motor includes a nut that rotates upon reception of the rotational driving force by the motor, and a ball screw shaft which is engaged with the nut and is movable in the axial direction and which abuts the second slave piston. The electric braking device further includes a worn-out reducer for reducing the worn-out of a contact part between the ball screw shaft and the second slave piston.

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: A vehicular braking apparatus including a shut-off valve for shutting off, as needed, a flow of oil from a wheel cylinder to a master cylinder; a pressure increase-decrease control valve increasing and decreasing a pressure in the wheel cylinder; a reservoir receiving and storing in a reservoir chamber the oil from the wheel cylinder when the pressure increase-decrease control valve is in a pressure decrease position; a pump sucking in and pressuring the oil from the reservoir chamber and supplying the oil to the wheel cylinder via the pressure increase-decrease control valve when the pressure increase-decrease control valve is in a pressure increase position; and a communication control valve controlling communication between the master cylinder and the reservoir chamber. The communication control valve is a normally-closed valve and is opened by a suction pressure of the pump.

Abstract: A brake system for motor vehicles having a brake master cylinder that can be operated by a brake pedal, a fluid reservoir assigned to the brake master cylinder, a hydraulic booster stage which is operatively connected to the inlet side of the brake master cylinder, with a booster piston which is subjected to a hydraulic boost pressure supplied by a pressure source and which in all operating modes allows a direct mechanical action by the brake pedal on a hydraulic piston of the brake master cylinder, and having an electrically controllable pressure regulating valve arrangement for metering the boost pressure. In order to provide a brake system of simple design, which is cost-effective to produce and which functions reliably, the pressure regulating valve arrangement can be hydraulically controllable.

Abstract: To provide a vehicle provided with a valve-stop-mechanism-equipped internal combustion engine capable of ensuring a negative pressure in a brake booster while preventing with reliability fresh air from flowing into a catalyst during a valve stop control. An internal combustion engine provided with a valve stop mechanism capable of changing the operational state of an intake valve between a valve operating state and a valve closed/stopped state is provided. A brake booster is provided capable of assisting operation of a brake pedal of the vehicle. Exhaust side negative pressure passages are provided as communication passages that are configured to be in communication with each branch pipe section of an exhaust manifold in a period in which a negative pressure is generated in the case where the intake valve is in the valve closed/stopped state while an exhaust valve is allowed to open and close. The remaining end of the second exhaust side negative pressure passage is connected to the brake booster.

Abstract: Provided are a braking control system for a vehicle which is controlled in a priority order, and a method of the same. A braking control system for a vehicle equipped with an electronic brake at each wheel includes a first control unit controlling the operation of a first electronic brake mounted at a front-left wheel and a second electronic brake mounted at a front-right wheel in response to braking signals, and a second control unit controlling the operation of a third electronic brake mounted at a rear-left wheel and a fourth electronic brake mounted at a rear-right wheel in response to the braking signals. In this configuration, when a fail occurs in any one of the first and second control units, the other control unit selectively controls at least one or more of the first to fourth electronic brakes, in accordance with predetermined logic.

Abstract: A hydraulic brake system includes: a plurality of hydraulic brakes; and a first hydraulic pressure generator including a first hydraulic pressure source and a first hydraulic pressure controlling portion that is configured to control an output hydraulic pressure of the first hydraulic pressure source to a target hydraulic pressure. The plurality of hydraulic brakes includes (a) at least one disk brake and (b) at least one drum brake. The first hydraulic pressure generator is in communication with a first brake cylinder that is the brake cylinder of each of the at least one disk brake, and is isolated from a second brake cylinder that is the brake cylinder of each of the at least one drum brake, in a case when a regenerative cooperative control is executed.

Abstract: A hydraulic brake apparatus includes a master cylinder pressurizing brake fluid in a pressure chamber and outputting a hydraulic pressure to a wheel cylinder of a first brake circuit, and a pressure control valve controlling a hydraulic pressure of an auxiliary hydraulic pressure source outputting the controlled hydraulic pressure to a wheel cylinder of a second brake circuit, wherein a master cylinder piston includes a first passage which hydraulically connects the pressure chamber and a reservoir, and a switching valve which closes and opens the first passage, and wherein a throttle means and a check valve, which allows the brake fluid to travel only from the reservoir to the pressure chamber, are hydraulically provided in parallel with each other at the first passage at a position between the switching valve and the reservoir.

Abstract: In a brake system, when setting a control origin position for a resolver for detecting a moved position of a booster piston, communication between a master cylinder and wheel cylinders is interrupted by cut valves. Thereafter, the booster piston is moved forward by an electric actuator in a direction in which a hydraulic pressure is generated so that a position detected by the resolver upon detection of generation of the hydraulic pressure by a hydraulic pressure sensor (position at a time of generation of hydraulic pressure) is obtained. A position obtained by moving backward the position at the time of generation of hydraulic pressure by a predetermined amount is set as the control origin position.

Abstract: A brake system with a master cylinder, a first piston which is coupled to a brake pedal via a push rod transmitting actuating forces, a second piston which can be actuated by the first piston and which can be brought into force-transmitting connection to a third piston, via which the master cylinder is actuated, at least one elastic element which forms a pedal travel simulator which, in the “brake-by-wire” operating mode, gives the vehicle driver a pleasant pedal sensation, an interspace capable of being acted upon with hydraulic pressure, between the second and the third piston, the action of pressure upon the interspace loading the second and the third piston in opposite directions, a pressure supply device which has a high-pressure source and which allows both a filling of the interspace with pressure medium and emptying thereof, and a valve device for varying pressure fed in the interspace.

Abstract: First hydraulic-pressure supply piping extended from an accumulator is connected to a first supply port (that is, to a second pressure chamber) of a cylinder, and to second hydraulic-pressure delivery piping of an ABS via third hydraulic-pressure supply piping having a third linear valve. When the braking hydraulic pressure Pf is reduced in the ABS, the degree and the period of time that the third linear valve is opened are set according to the amount of fluid discharged from the second hydraulic-pressure delivery piping to a reservoir tank through a pressure-reducing valve so that a certain amount of fluid is returned from the first hydraulic-pressure supply piping to the second hydraulic-pressure delivery piping via the third hydraulic-pressure supply piping.

Abstract: A braking system having a master cylinder to which wheel brake circuits (I, II) can be connected, a first piston coupled to a brake pedal, a second piston by means of which the master cylinder is actuated, a third piston actuated by the first piston and connected in a force transmitting fashion to the second piston, a simulation device which gives the driver of the vehicle a pedal sensation, an intermediate space between the second piston and third piston, a pressure generating device which controls the pressure in the intermediate space, a pressure medium reservoir vessel which is under atmospheric pressure and which can be connected hydraulically to the intermediate space, and means for electrically controlling the pressure in the intermediate space.

Abstract: A brake control apparatus for a vehicle includes four wheel braking apparatuses, a first hydraulic pressure generating apparatus, a front-wheel hydraulic circuit connecting the hydraulic pressure generating apparatus to the two of the wheel braking apparatuses, a rear-wheel hydraulic circuit connecting the hydraulic pressure generating apparatus to the other two of the wheel braking apparatuses, a second hydraulic pressure generating apparatus generating an auxiliary pressure, a braking operation variable detecting means, a reference amount determining means for determining a reference amount of auxiliary hydraulic pressure, an obtaining means for obtaining at least one of state quantities indicating a load condition, a driving condition and slipperiness of wheel, a target amount determining means determining a target amount of auxiliary hydraulic pressure of each hydraulic circuit to be equal to or greater than the corresponding reference amount of auxiliary hydraulic pressure, and a pressure regulating mean

Abstract: Disclosed herein are a sealing member for a master cylinder and a master cylinder having the same. The master cylinder is configured such that a communication hole of a piston is rapidly brought into communication with an oil path toward an oil tank upon release of braking. This may minimize meaningless retracting movement of the piston and delay in a braking release operation. The sealing member for the master cylinder includes an outer wing part to come into contact with the cylinder body, and an inner wing part to come into contact with the outer surface of the piston. The inner wing part includes a seal formed at a tip end thereof and at least one oil passage formed in a surface thereof opposite the outer surface of the piston.

Abstract: A pressure regulating valve unit 7 is configured to be electrically driven according to a detection value of a detection unit 74 adapted to detect an amount of brake application effort made by a brake operation member 5 so as to switch states of the vehicle brake apparatus between a state where a boosted hydraulic pressure chamber 9 is made to communicate with a hydraulic pressure generating source 6 while a communication between the boosted hydraulic pressure chamber 9 and a reservoir R is interrupted, a state where the communication between the boosted pressure chamber 9 and the hydraulic pressure generating source 6 is interrupted while the boosted pressure chamber 9 is made to communicate with the reservoir R, and a state where the boosted hydraulic pressure chamber 9 is disconnected from both the hydraulic pressure generating source 6 and the reservoir R.

Abstract: A pressure regulating valve unit is configured to regulate the output hydraulic pressure of a hydraulic pressure generating source through electrical control for application to a boosted hydraulic pressure chamber, and a release valve is interposed between the boosted hydraulic pressure chamber and a reservoir which is adapted to the hydraulic pressure in the boosted hydraulic pressure chamber to the reservoir side when the pressure regulating valve unit fails.

Abstract: A motor vehicle travel path control which monitors, during an autonomous braking event initiated by a collision preparation system the actual motor vehicle travel path in relation to the driver intended motor vehicle travel path, and in the event a departure from the driver intended motor vehicle path occurs, the motor vehicle travel path control adjusts braking so as to return the motor vehicle travel path to that intended by the driver.

Abstract: A brake system has a first piston (2) which is coupled to a brake pedal (3), a second piston (4) used to actuate a master cylinder (1), a third piston (5) actuated by the first piston (2) and movable into a force-transmitting connection with the second piston (4), and a pedal travel simulator. The first and the third pistons are coupled depending on the displacement of the third piston (5). The pressurization of a space (11) between the second and the third piston loads the second and third pistons (4, 5) in opposite directions. A pressure-supplying module (13) enables both filling and evacuation of the space (11) as well as its evacuation. A fourth piston (8) between the first piston (2) and the third piston (5) delimits a hydraulic compartment (9) in interaction with the third piston (5). A valve assembly (10) varies the pressure introduced into the space (11).

Abstract: A brake system for a motor vehicle having an at least single-circuit brake cylinder with the aid of which a brake force may be applied to at least one wheel of the motor vehicle when actuated. The brake cylinder is mechanically operatively connected to a booster cylinder, which is decoupled from brake setpoint detector and is hydraulically triggerable for actuation of the brake cylinder corresponding to the driver's intent as detected with the aid of the brake setpoint detector. A motor vehicle having a brake system is also described.

Abstract: Faster shifting operation and reduced shift shock in response to a braking operation during a lift-foot-up shifting may be achieved when an automatic transmission is controlled by a method for compensating a hydraulic pressure that includes: determining whether a lift-foot-up shifting of the automatic transmission is under control; calculating a vehicle speed of a vehicle; calculating a deceleration rate of the vehicle; calculating a compensation hydraulic pressure to be applied to a friction member of the transmission, based on the deceleration rate; calculating a on-coming pressure based on the calculated compensation hydraulic pressure; and applying the calculated on-coming pressure to the friction member.

Abstract: A method for determining whether a panic braking maneuver has been initiated in a vehicle with a brake pedal includes the steps of receiving brake pedal travel data, receiving brake pedal force data, determining a rate of change of acceleration of the brake pedal from the brake pedal travel data, determining a rate of change of acceleration of force applied to the brake pedal from the brake pedal force data, comparing the rate of change of acceleration of the brake pedal with a first predetermined value and a third predetermined value, and comparing the rate of change of acceleration of force applied to the brake pedal with a second predetermined value and a fourth predetermined value.

Abstract: A brake structure for a main shaft of a direct drive torque motor comprises a body, a direct drive torque motor, a main shaft and a brake assembly. The main shaft is provided for fixing the torque motor and the body, and the brake assembly is mounted between the body and the main shaft. An annular brake oil room of the brake assembly is positioned against the main shaft, and the brake seat subassembly has a thinner brake deformation wall formed between the annular brake oil room and the main shaft. The annular brake oil room utilizes its high pressure caused deformation to the brake deformation wall, thus achieving a braking effect by pressing the main shaft. Thereby, the present invention is easy to assemble, and not only can stop the main shaft quickly, but also has a greater locking force.