Abstract: A valve includes at least one of an electrical port adapted to receive an electronic control signal and a pneumatic control port adapted to receive a pneumatic control signal. The valve also includes a pneumatic delivery port. The pneumatic delivery port is adapted to transmit a pneumatic fluid, based on the at least one of the received electronic control signal and the received pneumatic control signal, from a second independent source to control i) a second associated service brake and ii) delivery of the pneumatic fluid from a first independent source to control a first associated service brake.

Abstract: A trailer backup assist system for a vehicle reversing a trailer includes a sensor module adapted to attach to the trailer and generate a trailer yaw rate or a trailer speed. The trailer backup assist system also includes a vehicle sensor system that generates a vehicle yaw rate and a vehicle speed. Further, the trailer backup assist system includes a controller that estimates a hitch angle based on the trailer yaw rate or the trailer speed and the vehicle yaw rate and the vehicle speed in view of a kinematic relationship between the trailer and the vehicle.

Abstract: A vehicle is provided. The vehicle includes a vehicle system. The vehicle system includes a brake-by-wire portion, which also includes a controller. The controller can cause a forced coastdown of the vehicle. The forced coastdown includes performing analyzing conditions of the vehicle system to determine whether the vehicle is in a stable state and to determine an amount of energy available to the vehicle system and automatically applying the forced coastdown when the vehicle is not in the stable state and the amount of energy is less than or equal to a threshold for continued manual operation of the vehicle. The forced coastdown also includes utilizing brake pressure to reduce a speed of the vehicle.

Abstract: A drive system, in particular for a self-propelled construction machine, in particular a soil compactor, comprising an internal combustion engine comprising a drive unit, at least one hydraulic circuit with a hydraulic pump that can be driven by the drive unit, as well as a hydraulic-drive support unit with a hydraulic pump/motor assembly and at least one pressure fluid reservoir, wherein the hydraulic pump/motor assembly is or can be drivingly coupled with the drive unit or/and at least one hydraulic circuit, wherein the hydraulic pump/motor assembly can be operated in a charging operating mode by the drive unit or/and at least one hydraulic circuit as a pump to charge at least one pressure fluid reservoir and be operated in an drive support operating mode as a motor to provide a drive support torque for the hydraulic pump of at least one hydraulic circuit, characterized in that the hydraulic pump/motor assembly can be operated in a recirculation operating mode as a motor to start the drive unit.

Abstract: A braking system for controlling braking of a machine is disclosed. The braking system includes a first set of sensors to detect a first set of information indicative of operational characteristics of an engine and a transmission system. The braking system includes a second set of sensors to detect a second set of information indicative of a load of the machine and a profile of a work surface. The braking system includes a receiving unit to receive a third set of information indicative of a predefined route of the machine. The braking system includes a controller configured to control an actuator for opening and closing of an exhaust port for engine braking, and to control a valve for achieving a predetermined gear-ratio during the engine braking, based on the first set of information, the second set of information, and the third set of information.

Abstract: A method allows piloting a braking system of a vehicle, the braking system including at least a pair of coupled brake actuators, that includes a pneumatic actuator supplied with a compressed air tank pressurized by a compressor, and an electric actuator.

Abstract: The invention relates to a technique for boosting the brake force of an electrohydraulic motor vehicle brake system in a mode in which, as a result of a mechanical push-through, an actuating force onto a brake pedal acts upon a master cylinder of the brake system. According to an aspect of this technique, the method comprises the steps of: determining a value of a first variable indicating a current deceleration of the vehicle; determining, based on the first variable, a value of a second variable indicating the actuating force; determining, based on the second variable, a required brake boost; and controlling an electromechanical actuator acting upon the master brake cylinder to obtain the required brake boost.

Abstract: An intelligent locomotive brake control system which selects and optimizes use of dynamic, independent, and automatic brakes on the locomotive to assure intended brake power, to minimize in-train forces, minimize brake component wear, and to automate standard train brake protocol. The system may be programmed to alter an automatic brake application commanded by a train driver to omit or reduce the amount of the automatic brake application in favor of a dynamic brake application, and independent brake application, or combination thereof.

Abstract: A method for operating a brake system of a vehicle, in particular a motor vehicle, including at least one wheel brake having a displaceable brake piston and an electric motor first actuator of a parking brake and a hydraulic second actuator of an operating brake for displacing the brake piston in each case. For operating the parking brake, the electric motor first actuator is activated in order to set a specifiable target clamping force of the wheel brake. If the maximum clamping force that is achievable by the electric motor first actuator is lower than the target clamping force, then the hydraulic second actuator is activated to provide an additional clamping force.

Abstract: An electro-pneumatic braking system including a pneumatic pressure supply pipe, a generator for generating a vehicle load signal, a weighting system designed to supply a weighted pressure which defines a maximum braking pressure, limited as a function of the load signal, and braking control units connected to the weighting system and having a relay valve connected between the pipe and at least one brake cylinder, to cause the application to this cylinder of a controllable braking pressure, equal to or less than the weighted pressure. The weighting system includes an electro-pneumatic drive assembly, interposed between the pipe and the drive inlet of the relay valve and is connected to the pipe through a pressure limiter, and an electronic weighting control unit which controls this drive assembly as a function of the load signal, so as to modulate in predetermined ways the pressure at the drive inlet of the relay valve.

Abstract: A rail vehicle includes a vehicle unit having operating device subsystems and a guide system including a first guide system level in which operating device subsystems are networked with one another by using a digital data bus structure, and at least one second guide system level having at least one line set associated with the analog handling of processes in the operating device subsystems. In order to provide a generic rail vehicle in which a high level of safety can be achieved with little outlay on wiring, the vehicle unit includes a guide system interface device having a first interface unit associated with the data bus structure, at least one second interface unit associated with the line set, and a control unit which, in at least one operating mode, is provided for handling the processes through the second interface unit.

Abstract: A vehicle monitoring system for turning off an idling engine comprises a vehicle speed sensor configured to detect a lack of motion, or “stationary status” of a vehicle and emit a parameter correlated to the motion status of the vehicle, a transmission status detector configured to detect a transmission status of the vehicle, an alerting device capable of warning other drivers of a stationary status of the vehicle and a control device. The control device is coupled to the vehicle speed sensor, the transmission status detector and the alerting device, wherein the vehicle speed sensor and the transmission status detector send a signal to the control device and the control device operates in a manner dependent on the motion status of the vehicle and the transmission status of the vehicle.

Abstract: A vehicle includes a front-wheel/rear-wheel motor, a battery and an ECU. The ECU is configured to (i) control the front-wheel/rear-wheel motors, and (ii) control the front-wheel/rear-wheel motors such that a braking torque of a resonance-side motor, when at least one of the rotation speed of the front-wheel/rear-wheel motors is within a resonance range, is smaller than the braking torque of the resonance-side motor, when the rotation speed of the front-wheel/rear-wheel motors are outside the resonance range, and such that the braking torque of a non-resonance-side motor, when at least one of the rotation speed of the front-wheel/rear-wheel motors is within a resonance range, is larger than the braking torque of the non-resonance-side motor, when the rotation speed of the front-wheel/rear-wheel motors are outside the resonance range, during deceleration caused by a braking torque from the front-wheel/rear-wheel motors.

Abstract: A system for automatically performing a bail off of the locomotive brakes in response to certain train braking operations without the need for the train operator to manually bail off the locomotive brakes. The system includes a controller that is programmed to determine when an appropriate train braking operation has been requested and to issue commands to the locomotive braking system to cause the locomotive brake cylinder to be reduced to zero pressure or a predetermined minimum pressure. The controller is also programmed to determine when an automatic bail off should be inhibited and/or cancelled depending on ongoing train conditions.

Abstract: A braking system for a turbine of a wind powered includes a hydraulic machine connected to a drive shaft of the turbine. A pressure regulating valve in the supply line of the hydraulic machine determines the pressure delivered to the supply line by the hydraulic machine. A control that is responsive to the speed of rotation of the drive shaft modulates the pressure regulating valve so as to increase pressure in the supply line as the rotational speed exceeds a predetermined speed to apply a braking force to the drive shaft.

Abstract: A method for providing thermo-acoustic coupling of a gas turbine engine augmentor includes determining acoustic resonances and heat release phase relationships associated with the augmentor. A fuel injector of the augmentor is positioned at an axial position relative to a flame holder of the augmentor in response to the determined acoustic resonances and heat release phase relationships associated with the augmentor. Heat release and acoustic pressure oscillation cycles associated with the augmentor are out of phase by at least approximately 100 degrees.

Abstract: A braking system includes a brake pipe, a pressure sensor and a pressure valve, each operatively associated with the brake pipe. The pressure valve is directed to reduce a pressure in the brake pipe in response to data from the pressure sensor, and a secondary pressure sensor is operatively associated with the brake pipe, wherein a pressure in the brake pipe is reduced in to data from the secondary pressure sensor.

Abstract: A hybrid vehicle includes a braking device configured to apply a frictional braking torque to a vehicle wheel in response to movement of an input member of a brake pedal, an electric motor configured to apply a regenerative braking torque to the vehicle wheel, and a control unit. During braking, the control unit is configured to determine a limit value of the regenerative braking torque that can be generated in accordance with an operating condition of the charging device or the electric motor, and reduce a ratio of the regenerative braking torque to the frictional braking torque before the regenerative braking torque reaches the limit value.

Abstract: A vehicle includes: a friction braking device configured to generate a friction braking force; a generator motor configured to generate a regenerative braking force; and a control unit configured to adjust the friction braking force and adjust the regenerative braking force by controlling energization of the generator motor such that a required braking force that is required by the vehicle is generated, interrupt energization of the generator motor at predetermined timing after timing at which a specific operation, which is a combination of a plurality of operations conducted by an occupant, has completed within a threshold time, and control the generator motor so as to prohibit generation of the regenerative braking force by the generator motor when at least one of the plurality of operations combined as the specific operation has been detected within a specific period back from braking start timing at which the required braking force is generated.

Abstract: A verification system for an end-of-train unit for a train having a first pressure sensor for determining the air pressure in a brake pipe, the system including: at least one additional pressure sensor to monitor or sense the air pressure in the brake pipe; and a computer to: receive or determine pressure data from the first pressure sensor; receive or determine pressure data from the at least one additional pressure sensor; compare the pressure data received or determined from the first pressure sensor with the pressure data received or determined from the at least one additional pressure sensor; and implement or facilitate an action based at least partially upon the results of the comparison. An improved end-of-train unit is also disclosed.

Abstract: A brake cylinder limiting valve having a first portion that determines actual brake cylinder pressure and a second portion that determines intended brake cylinder pressure based on brake pipe pressure reduction. The two portions are combined so that brake cylinder pressure will be vented if the actual brake cylinder pressure exceeds intended brake cylinder pressure by a predetermined threshold amount, which is preferably two and one-half times the brake pipe pressure reduction. An exhaust cut-off valve may be used to prevent venting of the brake cylinder pressure if it falls below a predetermined value.

Abstract: A system and method for automatically calibrating the flow measurement device of a locomotive air brake control system. The air brake control computer controls activates a magnet valve to create a predetermined flow from the brake pipe through an orifice to exhaust, thereby creating a reference flow value to enable the calibration of the flow measurement device. The system reduces the likelihood of human error and variability by automating the steps necessary for flow measurement calibration under computer control.

Abstract: A parking apparatus is provided for a vehicle. The apparatus comprises an electronic parking brake (EPB) valve having an air outlet port. The apparatus also comprises a pneumatic delivery line interconnecting the air outlet port of the EPB valve and a spring brake system to allow air pressure from the EPB valve to be applied to the spring brake system to maintain parking brakes of the vehicle in released position. The apparatus further comprises a normally-open solenoid valve having an air inlet port which is in communication with the delivery line which interconnects the air outlet port of the EPB valve and the spring brake system, wherein the solenoid valve is operable to vent air pressure from the delivery line and thereby to apply the spring brake system to park the vehicle in response to loss of electrical power to the solenoid valve.

Abstract: A braking device includes a guide piston which surrounds the outer periphery of a rod part of a second slave piston, a cup seal which is mounted on the second slave piston, and a seal member which is provided on the guide piston. The second slave piston includes an enlarged diameter portion which comes into contact with an axial-direction surface of the guide piston when the second slave piston is in the initial position, and the enlarged diameter portion is provided with a cut-out section which extends in the internal diameter direction of the second slave piston.

Abstract: A method for controlling a brake system, which has pressure medium-activated wheel brakes and is at least partially electronic, and which is in a vehicle that includes at least two axles, including generating brake pressures for the wheel brakes on an axle in a pressure-controlled manner, and electronically regulating the brake pressures for the pressure medium-actuated wheel brakes on at least one further axle in terms of a brake pressure regulation for adjusting an actual brake pressure to a desired brake pressure. A related braking system device is also described.

Abstract: A braking device includes a guide piston which surrounds the outer periphery of a rod part of a second slave piston, a cup seal which is mounted on the second slave piston, and a seal member which is provided on the guide piston. The second slave piston includes an enlarged diameter portion which comes into contact with an axial-direction surface of the guide piston when the second slave piston is in the initial position, and the enlarged diameter portion is provided with a cut-out section which extends in the internal diameter direction of the second slave piston.

Abstract: A compressed air supply device for a commercial vehicle is electrically connected to an electronic control device. The compressed air supply device includes a control valve which is actuated via the control device. The control valve has an inlet, vent and outlet connections. A control line, which is connected to the outlet of the control valve, is connected to a control inlet of a compressor and/or, for regeneration, to an air filter. A supply line can supply compressed air to the control valve inlet. A venting line connects to the control valve vent. A backup valve is provided, wherein an inlet of the backup valve is connected to the supply line and an outlet can be connected to the venting line. The backup valve opens pneumatically when a pressure which corresponds to or exceeds a predetermined opening pressure is present in the supply line.

Abstract: A “brake-by-wire” type brake system for a motor vehicle, having a brake pressure sensor which can be activated by a brake pedal of a pedal unit and can be connected to wheel brakes of the vehicle outside the “brake-by-wire” operating mode, having a pressure source which can be actuated by an electronic control unit and can be connected to the wheel brakes of the vehicle in the “brake-by-wire” operating mode, and having a pedal travel simulator which interacts with the brake pedal and is formed by at least one simulator element, and a restoring force which acts on the brake pedal independently of the actuation of the pressure source can be simulated in the “brake-by-wire” operating mode. In order to provide a simpler and more cost-effective “brake-by-wire” type brake system, a force/travel characteristic of the pedal travel simulator is provided in a controllable fashion.

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

Abstract: An electric-hydraulic antilock braking system (ABS) installed in a trailer is coupled with a tow vehicle to facilitate controlled braking of the trailer. A trailer in-cab controller (TIC) monitors vehicle networks for diagnostic information used in determining appropriate braking actions to be taken. A communication network can interconnect the TIC, a trailer actuator controller (TAC), and an ABS controller. The ABS controller receives current tow vehicle speeds and current trailer wheel speeds, and dynamically adjusts the brakes based on the differences in the speeds. A three-way solenoid valve or an equivalent valve structure thereto allows for the ABS system to be quickly activated and deactivated.

Abstract: A valve system of a braking device provided with a stroke simulator that is connected via a connection passage with a pipe for making a master cylinder communicate with a wheel cylinder; and a third shut-off valve that is a solenoid valve and performs opening and closing of a communication between the master cylinder and the stroke simulator, wherein the third shut-off valve is a normally closed valve; and the valve system opens the third shut-off valve by applying a start-up voltage, thereafter keeps the open state of the third shut-off valve by alternately applying a holding voltage that is lower than the start-up voltage and the start-up voltage, in order to prevent heat generated in the valve from becoming excessively high even while keeping the open state of the valve.

Abstract: An electropneumatic pressure regulating module, formed as a structural unit, is described for an electropneumatic brake system of a vehicle, including: at least two separately regulable pressure regulating channels, wherein a regulated working pressure, acting at at least one working pressure port, for at least one brake application device of the brake system is generated for each pressure regulating channel on the basis of working air originating from at least one compressed air store and as a function of braking demand signals of a brake transducer, in which to form pressure regulating channels having separate pneumatic circuits, each pressure regulating channel is assigned at least one dedicated storage pressure port which can be connected to a dedicated compressed air store, and in which the pneumatic flow paths of each pressure regulating channel are formed so as to be pneumatically separate, at least proceeding from the respective storage pressure port as far as the respective working pressure port, fro

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: An electric brake device includes: a motor cylinder device that generates a hydraulic pressure in accordance with a brake operation of a driver with an electric motor; a rotational angle sensor that detects a rotor rotational angle ? of the electric motor; and a motor control section that controls an output torque of the electric motor corresponding to the rotor rotational angle ? and controls the electric motor by advancing a detection value of the rotational angle sensor. The current phase setup section sets a current phase to an advanced side as an electrical advance control. The current phase setup section inhibits the advancing the detection value when the electric motor performs reversed rotation, or sets the current phase to a retarded side.

Abstract: A brake system includes a brake apparatus. This brake apparatus is configured to keep a vehicle braked by an electric mechanism in response to a parking brake request signal, and brake the vehicle by supply of a hydraulic pressure from a hydraulic source in response to an operation performed on a brake pedal. The brake system further includes a controller configured to drive the electric mechanism until a target pressing force is acquired to establish a brake holding state in response to the parking brake request signal. The controller is configured to change the target pressing force according to a change in a hydraulic pressure in the brake apparatus after starting driving the electric mechanism in response to the parking brake request signal.

Abstract: A first slave piston and a second slave piston are disposed in tandem in series within a cylinder body, and the pistons are arranged so that part of the shaft section of the second slave piston overlaps with the inner periphery of an opening section provided in the backward side, in the displacement direction, of the first slave piston. A long hole extending along the axial direction of the second slave piston is provided in the shaft section, and a connection pin which regulates the initial position of the second slave piston is inserted into the long hole.

Abstract: A brake apparatus includes: a fluid pressure control valve; a fluid pressure pump; a feedback control circuit correcting a control power corresponding to a feedback control target rotation number of a motor and feed the corrected control power to a motor; a feed forward control circuit configured to feed, to the motor, a control power corresponding to a feed-forward control target rotation number of the motor; and an abnormal control fluid pressure generation control device, if a rotation number detector is abnormal, rotating the electric motor with the rotation number higher than the feedback control target rotation number by a margin rotation number, increases the brake fluid passing through the fluid pressure control valve, and changes the control current to be supplied to the fluid pressure control valve so that the wheel cylinder fluid pressure is not changed.

Abstract: A hydraulic brake apparatus for a vehicle is provided. The hydraulic brake apparatus includes a master cylinder, a high hydraulic pressure source, a brake assist mechanism, a liquid reservoir, an electronic control device, a hydraulic control device and is configured such that the master cylinder is actuated by a force assisted by the brake assist mechanism to generate a hydraulic pressure and a braking force according to the hydraulic pressure is applied to a wheel of the vehicle. The hydraulic brake apparatus further includes driving pressure reducing valve which is configured such that when a hydraulic pressure in a master pressure input port is higher than that in the driving pressure input port by a predetermined value, the hydraulic brake apparatus is actuated based on the pressure difference to open a hydraulic pressure discharge path extending from a driving hydraulic pressure chamber to the liquid reservoir.

Abstract: A brake device for motor vehicles has at least two hydraulic brake circuits which are directly connected to a master brake cylinder, as well as an additional brake circuit, which is able to be actuated via a control device, independently of the master brake cylinder. Because of the separate hydraulic brake circuits in the region of the front axle, redundancy is provided, while the third brake circuit, that is able to be actuated independently of the master brake cylinder and typically acts on the rear wheels, during automatic actuation, permits taking into account a braking effect by additional active assemblies, such as a driven generator.

Abstract: A method and system for operating a motor vehicle brake system, actuated in a “Brake-by-Wire” operating mode both by the vehicle driver and also independent of the vehicle driver, preferably operated in the “Brake-by-Wire” operating mode, and which can be operated in at least one fall-back operating mode, in which only operation by the vehicle driver is possible. The brake system has an electrohydraulic pressure and volume setting device, which electronically emits a brake system pressure under control, and a pressure modulation unit having, for each wheel brake, inlet and outlet valves for setting wheel-specific brake pressures. For setting wheel-specific brake pressures, the inlet and outlet valves are actuated analogously by being energized by different electrical currents, in order to assign a pressurizing agent volume flow provided by the pressure and volume setting device to the wheel brakes that have a pressure change requirement.

Abstract: A vehicle braking control device includes a control unit that, when a characteristic representing the relationship between an estimated amount of fluid consumed by braking, which is estimated based on the amount a brake pedal is operated, and an actual master-cylinder pressure detected by a master-cylinder pressure detection unit is different from that of a preset characteristic in a reference map indicating representing the relationship between the amount of fluid consumed by braking and the master cylinder pressure, corrects a target value of a degree of relative displacement between an input member and an assist member by a target relative displacement-amount correction unit in a direction in which the difference between characteristics is reduced.

Abstract: A valve arrangement for controlling a brake system, comprising at least one spring brake cylinder and at least one service brake cylinder, of a trailer vehicle of a traction vehicle-trailer combination, characterized in that said valve arrangement includes a 3/2 way valve which, as a function of the control pressure present at its control inlet, connects either its connection, which is connected to an outlet of a control valve device in order to generate service brake pressure for the at least one service brake cylinder, or connects its connection, which is connected to a trailer-vehicle-side compressed air supply, to its further connection which is connected to the at least one spring brake cylinder.

Abstract: The invention relates to an aircraft braking system having brakes with electromechanical braking actuators (103) adapted to press selectively against associated stacks of disks in order to generate a braking torque on associated wheels of the aircraft; at least one control module (130) receiving braking setpoints and responding by generating a braking command (121); and at least one power module (120) responding to the braking command by delivering AC power to the motors of actuators connected to the power module so that the motors develop a braking force corresponding to the braking setpoints. According to the invention, the control module includes a digital processor stage (131) and an analog processor unit (135).

Abstract: The invention relates to an electronically regulable brake system, with an actuating device, in particular a brake pedal, a main brake cylinder arrangement with at least two parallel arranged piston cylinder units and a reservoir, which are connected via hydraulic lines and valves to wheel brakes, and with a servo mechanism. According to the invention an electrically drivable valve device (BV1, BV2, EA) is provided between the brake circuits allocated to the piston cylinder units (16, 17), in order to allow the regulated transfer of hydraulic fluid between the brake circuits (bypass) and the reservoir (24).

Abstract: A method and system for operating a brake system for motor vehicles, including a plurality of wheel brakes for which wheel-individual nominal pressure includes an electrically controllable pressure supply device, to provide a brake system pressure for actuating the wheel brakes. The brake system pressure provided by the pressure supply device can be determined. An electrically controllable inlet valve and electrically controllable outlet valve per wheel brake adjust wheel-individual brake pressures.

Abstract: A vehicle brake system includes a first fluid chamber whose volume changes corresponding to the amount of advancement and retraction of the input piston, a second fluid chamber into which hydraulic pressure from a hydraulic pressure source is introduced after adjustment in a pressure regulator, a third fluid chamber kept at the atmospheric pressure, a stroke simulator which generates a reaction force to the brake operation corresponding to a change in volume of the first fluid chamber, a master cylinder, a partition member partitioning each of the second and third fluid chambers from the first fluid chamber, first and second seal members disposed in respective fitting gaps, and an annular member having both ends abutting respective seal members. The annular member divides a space into first and second space portions whose volumes respectively increases and decreases by the same amount when the annular member moves in one axial direction.

Abstract: A system for use in a vehicle with a brake pedal and a brake circuit. The system includes a master cylinder assembly configured to pressurize fluid therein in response to movement of the brake pedal, a sensor assembly configured to generate a pedal position signal indicative of position of the brake pedal, an electronic control unit configured to (i) generate a brake request signal in response to generation of the pedal position signal, and (ii) generate a selector control signal, and a selector valve assembly being moved from a first mode to a second mode in response to generation of the selector control signal, the master cylinder assembly is (i) isolated from fluid communication with the brake circuit when the selector valve assembly is positioned in the first mode, and (ii) in fluid communication with the brake circuit when the selector valve assembly is positioned in the second mode.

Abstract: A brake control apparatus obtains a required braking force using a hydraulic braking force in combination with a regenerative braking force. The brake control apparatus includes a hydraulic brake unit that controls the hydraulic braking force. When the deviation of an actual hydraulic pressure from a target pressure falls outside a permissible range (d), the hydraulic brake unit controls the actual hydraulic pressure in such a manner that the deviation falls within the permissible range. On the other hand, when the deviation is within the permissible range (d), the hydraulic brake unit maintains the actual hydraulic pressure. The hydraulic brake unit includes a control unit that detects timing (Ta) at which usage of the hydraulic braking force needs to be started to compensate for a deficiency from the required braking force, and that raises (r) the target pressure at the detected timing (ta).

Abstract: An electrically actuatable parking brake system for a pneumatic braking system includes a control valve device that has a control piston. The parking brake system can assume at least two operating states, namely a parked state or a driving state. The operating states can be assumed in a selective manner dependent on a position of the control piston, and the parked state is provided when the control piston is forced into an end position by the force of a spring that lies in a spring chamber. Leaked air that exits a ventilating connection of the control valve device can be returned into the spring chamber.

Abstract: An antilock brake system for a vehicle may include a controller that is linked to a brake pedal sensor. The brake pedal sensor may be linked to a brake pedal. The brake pedal may be coupled to a normally closed brake pedal valve. The brake pedal valve may include an inlet in communication with a source of pressurized hydraulic fluid and an outlet in communication with a normally opened isolation valve. The isolation valve may be in communication with one or more main control valve systems and may be linked to a controller which maintains the isolation valve in a closed position during normal operating conditions. The isolation valve then shifts to an open position in the event current supply by the controller is interrupted as a result of an electrical failure or malfunction of the controller.