Abstract: A magnetic levitation railways is described comprising at least one vehicle (1, 2), a compressed air supply unit provided in the vehicle (1, 2) and at least one consumer connection line (5, 15). According to the invention said compressed air supply unit has at least two compressed air lines (3, 4, 12, 14) laid in said vehicle (1, 2) and connected to at least one compressed air source (e.g. 19 to 22) each. The consumer connection line (5, 15) can be connected to one or another of the compressed air lines (3, 4, 12, 14).

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

Abstract: A brake control apparatus for a vehicle includes a wheel cylinder, a pump for pressurizing a brake fluid in the wheel cylinder, and an electric motor for driving the pump. A controller operates the electric motor so as to conform an internal pressure of the wheel cylinder to a desired internal pressure of the wheel cylinder, and produces a torque applied to the electric motor in a first rotational direction, while the pump is stopping from a state in which the electric motor is rotating in a second rotational direction opposite to the first rotational direction so as to allow the pump to pressurize the brake fluid in the wheel cylinder.

Abstract: A brake control apparatus for a vehicle includes a first calculating portion for calculating a master cylinder pressure, a first determining portion for determining whether or not the brake operation is performed, a second calculating portion for calculating a target wheel cylinder pressure, a third calculating portion for calculating a controlled pressure, a controlling portion for controlling a pressure difference control valve, a second determining portion for determining whether or not the vehicle is stopped, and a driving portion for specifying a drive pattern of a motor to a first motor drive pattern in a case where the vehicle is not stopped, the motor driving a pump for discharging a brake fluid, the driving means specifying the drive pattern to a second motor drive pattern in a case where the vehicle is stopped, the driving means driving the motor based on the motor driving pattern specified.

Abstract: A regenerative brake system and a variable displacement pump/motor for use therein. Each cylinder of the pump/motor having a main piston and a second piston between which is defined a space for hydraulic fluid, and a resilient element acting on the second piston to bias it toward the main piston. Variable displacement is achieved by controlling a volume of pressurized fluid that is injected and exhausted between the main and second pistons. Brake, drive and neutral modes of operation of the pump/motor are achieved by controlling the timing (relative to a drive shaft phase) of the injection and exhaust of the fluid. Regeneration is achieved by storing pressurized fluid generated by the pump/motor in an accumulator in brake mode and using the stored pressurized fluid to power the pump/motor in drive mode.

Abstract: A fluid braking system for efficiently transferring a substantial amount of energy utilized when braking a vehicle to energy utilized for accelerating the vehicle. The fluid braking system generally includes a storage tank including hydraulic fluid, wherein the storage tank receives the hydraulic fluid from a drive mechanism, at least one hydraulic actuator fluidly connected to the storage tank and a hydraulic accumulator fluidly connected to the hydraulic pump and the drive mechanism.

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

Abstract: A brake system for a vehicle has a brake pedal and at least one rotational part. The brake system further includes a shaft connectable to the rotational part, and a first fluid control unit configured for being filled with fluid and actuating in response to manipulation of the brake pedal. In addition, at least two cylinders in fluid communication with the first fluid control unit are provided. Each cylinder has a first cylinder end having an associated reciprocating piston and a second cylinder end configured for connection to the vehicle. The brake system also includes a linkage, connected to the at least one first cylinder end of a respective reciprocating piston and to the shaft to provide balanced operation of the reciprocating pistons upon rotation of the shaft.

Abstract: A brake system for braking a rotatable brake disk includes a primary brake piston engagable with the brake disk and a secondary brake piston engagable with the primary brake piston and operable to move the primary brake piston into engagement with the brake disk. Both pistons are operable in response to fluid pressure. A primary brake valve controls communication of fluid pressure to the primary brake piston. A secondary brake valve controls communication of fluid pressure to the secondary brake piston.

Abstract: A circulating fluid regulated braking device for a vehicle includes a piston pump mounted directly on the hub of each vehicle wheel. The pumps mounted on front wheels are connected by pipes to a primary two-way valve, which, in turn, is connected by pipes to a primary storage tank to define a completely independent front wheel brake hydraulic circuit. The pumps mounted on rear wheels are connected by pipes to a secondary two-way valve, which, in turn,is connected by pipes to a secondary storage tank to define a completely independent rear wheel brake hydraulic circuit. A moveable inner body located in each of the primary and secondary two-way valves is linked to a vehicle brake pedal lever.

Abstract: A hydraulic pump unit that includes a pump and an internal reservoir that is mountable as a unit to a towed vehicle. The hydraulic pump unit can be assembled in a plurality of configurations such that an inlet to the pump is located at a relatively low point within the internal reservoir depending on the orientation in which the unit is mounted to the towed vehicle. Thus, the power unit can be adapted for use in a plurality of applications thereby making the unit versatile.

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

Abstract: A pump drive motor control apparatus controls a motor used for driving a hydraulic pump. Every time the supply of electricity to the motor is resumed (every time the motor control signal changes from a low level to a high level), the apparatus measures a time which the voltage generated by the motor requires to decrease by a predetermined amount, the time indicating the decreasing speed of the generated voltage. The apparatus normally sets the high-level maintenance time, in which the motor control signal is maintained high, to a base time. When a state in which the measured time is not longer than a reference time is detected a predetermined number of times (3 times) or more, the apparatus determines that the load of the pump is heavy. In such a case, the apparatus increases the average rotational speed of the motor by increasing the high-level maintenance time.

Abstract: A vehicular brake hydraulic pressure control device of the invention includes accumulators that are connected to a first brake pedal L1 and store brake fluid with a first master cylinder MC1 at atmosphere, a first brake system K1 that is operable to apply interlock control to a front wheel brake F of a second brake system K2, and a switching unit 6 that switches channels of brake fluid flowing to the first hydraulic pressure output channel D1 of the first brake system, from the first master cylinder MC1 to the accumulators 7, 8 when a pump 24 is in operation.

Abstract: A vehicular brake hydraulic pressure control device has a first operation unit T1 including a first brake operation element; a first brake system K1 for braking a first wheel brake R corresponding to the first operation unit T1; and a first control valve unit A and B for controlling brake hydraulic pressure in the first brake system. In the device, the first operation unit T1 and the first brake system K1 are separated so as not to flow a brake fluid, and the device further comprises a brake fluid tank 30 having a reservoir function for supplying the brake fluid to the separated first brake system K1.

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

Abstract: A hydraulic unit for a hydraulic regulation device, in particular for slip-controlled motor vehicle brake systems, includes several hydraulic, mechanical and/or electrically operable functional elements arranged at an accommodating member, such as accumulation elements, valve elements, pressure-generation and driving elements, and including at least one cavity associated with at least one functional element. Two connecting channels that lead into the atmosphere are provided with closing devices, which hinder the ingress of fluid into the cavity and allow ventilation of the cavity and a discharge of leakage fluid into the atmosphere. The invention permits an automatic bleeding and an automatic removal of leakage fluid independently of the spatial arrangement of the unit.

Abstract: A vehicle brake apparatus has a wheel cylinder that generates a braking force when a pump is rotated in a first direction and does not generate the braking force when the pump is rotated in a second direction. A brake control section operates a valve to open a channel between the pump and the wheel cylinder and rotates the pump in the first direction to increase the braking force in accordance with a driver braking operation. The brake control section operates the valve to close the channel between the pump and the wheel cylinder to maintain the braking force in accordance with the driver braking operation. The brake control section rotates the pump in the second direction when the driver braking operation is not performed. The diagnosis section detects a rotation state of the pump while the pump rotates in the second direction to diagnose abnormalities in the pump.

Abstract: In one aspect, a brake pump assembly including a plurality of pairs of pumping elements configured in a horizontally opposed arrangement, and a rotatable eccentric assembly located between the pumping elements. The pairs of pumping elements abut the eccentric assembly and are reciprocally driven to provide an output of pressurized fluid. In another aspect, a brake pump assembly including a hydraulic block defining a piston bore, and a pumping element received in that bore. The pumping element includes a polymer piston, and a circumference of the polymer piston defines a high-pressure seal slideably engaging adjacent structure. In another aspect, a hydraulic block coupled to an electronic control unit, the hydraulic block including a plurality of pairs of pumping elements located in a horizontally opposed arrangement, and an embedded pressure sensor, the pressure sensor being adjacent to but vertically separated from the pumping elements.

Abstract: A system for braking the wheels of a hydraulic hybrid vehicle includes a brake pedal having a range of pedal displacement including a deadband displacement range, an accumulator containing fluid at relatively high pressure, a reservoir containing fluid at lower pressure, a pump/motor having variable volumetric displacement connected to the accumulator and reservoir, and driveably connected to the wheels; a system responsive to brake pedal displacement in the deadband range for placing the pump/motor in a pump state wherein the pump/motor is driven by the wheels and pumps fluid from the reservoir to the accumulator; and a control valve for changing the volumetric displacement of the pump/motor in response to displacement of the brake pedal.

Abstract: A method of operating a brake system for a hydraulic motor, by feeding the hydraulic motor with at least one pump having a variable cubic capacity, in a closed circuit, providing a friction brake to brake the motor, providing a brake controller that controls an amount of applied frictional braking by the friction brake and an amount of applied hydraulic braking, and determining a level of actuation of the brake controller to detect normal and emergency braking situations. In normal braking situations, the proportional amount of frictional and hydraulic braking is managed as a function of parameters to cause progressive hydrostatic braking to occur by causing a ratio between the fluid flow rate delivered by the pump and the active cubic capacity of the motor to decrease progressively. In emergency braking situations there is a controlled sudden decrease in the ratio between the fluid flow rate delivered by the pump and the active cubic capacity of the motor, and then progressive hydrostatic braking occurs.

Abstract: The invention relates to an electrohydraulic assembly for an electronically controlled brake system with an accommodating member which includes accommodating bores for electrohydraulic valves, accommodating bores for hydraulic supply devices and an accommodating bore for at least one roller bearing, and with hydraulic channels and pressure fluid ports, as well as with an electric motor comprising a rotor with a shaft that is mounted with the roller bearing in the associated accommodating bore in the accommodating member and used to drive the supply devices, and with an electronic control unit being connected to the electric motor by means of a plug penetrating a through-bore in the accommodating member. The objective is to provide a safe and comfortable operating characteristics even in consideration of extreme environmental influences.

Abstract: A braking system includes a brake actuator which is moveable in a first direction to cause a brake applying member to apply a braking force to a member to be braked. A master valve includes a piston assembly which upon operation of a brake operating member, directs the hydraulic fluid under pressure to the brake actuator to apply the brake. A charging valve is operable in first and second states. The master valve piston assembly includes a pair of coupled pistons separated by a chamber. In a first state, the charging valve connects a source of pressurized hydraulic fluid to the master valve chamber to move the pistons apart, directing a volume of hydraulic fluid to the brake actuator. In a second state, the charging valve connects the chamber to a lower pressure area to allow the pair of pistons to be moved towards one another by a restoring force.

Abstract: A hydraulic circuit includes an accumulator having an inflow passage which introduces a hydraulic fluid which is discharged from a hydraulic pump into a hydraulic fluid chamber and a discharge passage which discharges the hydraulic fluid from the hydraulic fluid chamber to a hydraulic actuator. The hydraulic circuit includes a valve mechanism which restricts the supply of hydraulic fluid from the hydraulic fluid chamber to the hydraulic actuator when the pressure in the hydraulic fluid chamber is less than a set pressure and which releases the restriction of the supply of hydraulic fluid to the hydraulic actuator when the pressure in the hydraulic fluid chamber is at least the set pressure. The valve mechanism may be installed inside the accumulator.

Abstract: In a brake apparatus, a pump sucks brake fluid and discharges the brake fluid through a pump discharge conduit. Orifices are connected in series with one another with respect to brake fluid flow discharged from the pump and restrict the brake fluid flow. Because the orifices are formed for restricting brake fluid pulsation, the brake fluid pressure discharged from the pump decreases gradually. Therefore, cavitations are not generated at lower reaches of the orifices because the brake fluid pressure does not decrease rapidly. As a result, the brake apparatus decreases or restricts undesirable noise.

Abstract: Selective actuation device (1) comprising and actuator (5) acting upon an actuation lever (7) that has at least one thrusters element (7b) for the actuation of a first operating group (12, 13) and a cam element (6) mobile between an activation position in which it acts upon a second operating group (9, 10) and a rest position in which the activation of the first operating group (12, 13) is disassociated from the second operating group (9, 10).

Abstract: A pump assembly with a combination reciprocating high-pressure seal and fluid inlet check valve for use within brake systems. The pump assembly comprises a housing having a bore formed therethrough and a piston disposed within the bore for reciprocal movement therein. An annular seal is disposed around the piston for reciprocal movement thereon. The annular seal cooperates with the piston and/or the housing to form at least one longitudinally extending passageway. The passageway, the piston, the annular seal, and the housing cooperating to form a check valve assembly. The annular seal is moveable to a first position relative to the piston in which the check valve assembly is in a flow-through position to fill a pump chamber with fluid from an inlet chamber during a fluid inlet stroke. The annular seal is moveable to a second position relative to the piston in which the check valve assembly is closed.

Abstract: The invention relates to an architecture for a hydraulic circuit associated with actuators (100), such as actuators for airplane brakes, the architecture comprising a main hydraulic circuit (C) having hydraulic components (4, 5 101, 6) and adapted to convey hydraulic fluid pressurized by at least one pressure generator (2) associated with a main supply (1) to the actuators (100). The architecture includes an emergency system comprising an auxiliary supply (8) permanently fed by a return circuit (R) collecting the returns from all of the hydraulic components (4, 5,101, 6), the auxiliary supply (8) being connected to the main supply (1) via a relief valve (9). The emergency system further comprising an electrically driven pump unit (10) arranged to take fluid from the auxiliary supply (8) and to inject it into the main circuit (C) downstream from a general check valve (3).

Abstract: A brake system according to the present invention comprises an eccentric rotor and a brake effecter module. The brake effecter module has a pair of hydraulically interconnected actuators, a brake control valve and a brake exciter. Each of the pair of actuators can engage a different point on the eccentric rotor. The brake control valve effects braking by restricting the flow of a working fluid that is pumped in and out by each of the actuators as they engage the rotating rotor. The degree of restriction to the flow of the working fluid can be varied to adjust the amount of braking force applied. The brake system is self-energizing in that it is not reliant on a substantial external source of energy to effect braking. The energy required to pump the working fluid is derived from the rotation of the rotor. The brake exciter provides for disengagement of the actuators from the rotor when braking force is not being applied.

Abstract: A hydraulic braking apparatus for a motor vehicle having a service braking system (A) fed by a central hydraulic unit (3) and an emergency braking system (B). A simulator (M) resists a forward motion of an actuator member (D, 16) for a master cylinder (17) to define a reaction corresponding to the progress of a braking operation. Admission solenoid values (9a-9d) and exhaust solenoid values (14a-14d) connected to the wheel brakes (2a-2d) modulate pressurized fluid supplied by a central hydraulic unit (3) in effecting the braking operation. Sensors (8, 13a-13d, 24, 29) in the motor vehicle detect various braking parameters that are communicated to a computer (C) to control the solenoid valves (9a-9d; 14a-14d) such that the braking operation is a function of the travel of the actuator member (D, 16).

Abstract: A pump drive motor control apparatus is applied to a motor for driving a hydraulic pump which supplies to a hydraulic circuit the brake fluid returned to a reservoir as a result of ABS control. When a motor inter-terminal voltage becomes equal to or less than a voltage threshold in a period during which a motor control signal is at a low level (supply of electricity to the motor is stopped), the control apparatus changes the motor control signal to a high level (resumes the supply of electricity) for a predetermined time, to thereby control the rotational speed of the motor. When the cause of the start of ABS control is not a demand for excessively abrupt braking, the voltage threshold is lowered to reduce the rotational speed of the motor during a predetermined period of time immediately after the start of ABS control.

Abstract: A braking amplifier for a vehicle, comprising: a depression chamber (10); a working chamber (12); a shutter (30); and an intermediate chamber (64) communicating with the depression chamber (10) and forming a seat (52) for the shutter such that the shutter is able to place the intermediate chamber in communication with the working chamber and to prevent this communication. The seat (52) is formed by several separate zones arranged around an axis (6) of the amplifier.

Abstract: A brake control system for towed vehicles is disclosed which provides for controlled application of hydraulic brakes in a towed vehicle in response to the application of the brakes of the towing vehicle. The system is designed in two preferred embodiments. The first embodiment is a self-contained design adapted for use with rental trailers, for example, where a plurality of towed vehicles will be associated with a particular trailer. The second embodiment is intended for hard wiring in connection with the towed and towing vehicles. In each case, superior performance is obtained because the system operates the brake system of the towed vehicle in a unique manner.

Abstract: The invention relates to an architecture for a hydraulic circuit associated with actuators (100), such as actuators for airplane brakes, the architecture comprising a main hydraulic circuit (C) having hydraulic components (4, 5 101, 6) and adapted to convey hydraulic fluid pressurized by at least one pressure generator (2) associated with a main supply (1) to the actuators (100). According to the invention, the architecture includes an emergency system comprising an auxiliary supply (8) permanently fed by a return circuit (R) collecting the returns from all of the hydraulic components (4, 5, 101, 6), the auxiliary supply (8) being connected to the main supply (1) via a relief valve (9), said emergency system further comprising an electrically driven pump unit (10) arranged to take fluid from the auxiliary supply (8) and to inject it into the main circuit (C) downstream from a general check valve (3).

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

Abstract: The aim is to reliably detect abnormality of a brake device with a simple structure without providing a special detecting means. A pump for generating brake hydraulic pressure of a hydraulic brake device is driven when the ignition switch for starting the vehicle is closed. The rise time of the output of a brake hydraulic pressure detecting means provided in the hydraulic brake device is detected, and it is determined that uneven wear of the pads has occurred if the rise time is longer than a predetermined time. An alarm lamp is turned on to notify abnormality. Thereby it is possible to accurately detect abnormality of the brake device before the driver drives the vehicle without providing a special detecting means.

Abstract: The motor/pump unit (10) comprises an electric motor (12) and at least one pump (14) for delivering brake fluid. The electric motor (12) has a stator (16), in which a rotor (18) is rotatably disposed. The pump (14) is disposed substantially inside the rotor (18) and is drivable by the latter. In order to provide a particularly compact energy source for the vehicle brake system, there is disposed adjacent to the motor/pump unit (10) at least one aggregate (23), which is drivable with the aid of the rotor (18).

Abstract: In a rotary pump in which axial end surfaces of outer and inner rotors is in pressurized direct contact with an axial end surface of a second side plate to form a mechanical sealing, both of the axial end surfaces of the outer and inner rotors and the axial end surface of the second side plate are provided with radial line grinding stripes. Teeth gap portions formed by the outer and inner rotors in mesh communicate with an outer circumference gap between the circumference of the outer rotor and inner circumference of a center plate and also with a shaft hole of the inner rotor through extremely slight gaps formed by concave and convex of the radial line grinding stripes so that contact surface between the outer and inner rotors and the second side plate is well lubricated to reduce torque loss.

Abstract: A vehicular braking force control apparatus includes a solenoid valve disposed between a master cylinder and the suction side of a hydraulic pump. A ripple absorption low-pressure reservoir is provided between the solenoid valve and the suction side of the hydraulic pump. The low-pressure reservoir is partitioned, by a partition member, into an operation liquid portion that communicates with an auxiliary suction passage and an air portion where air exists. A spring member for pressing the partition member toward the operation liquid portion side is provided in the air portion.

Abstract: An actuating unit for a wheel brake of a motor vehicle has a hydraulic pump drivable with variable speed by an electric motor, as well as an element, adjusting the return flow of pressurized media to the pump, which is arranged between the delivery side and the intake side of the pump. Furthermore, a cylinder-piston unit is provided, having a piston with identical surfaces on both sides, as well as a cylinder having cylinder chambers arranged on both sides of the piston. In order to press a brake lining against a friction element connected to a vehicle wheel, the pump is connected on the intake side to the cylinder chamber on the brake-lining side, and on the delivery side to the cylinder chamber facing away from the brake lining. The actuating unit is assigned a control device by which an electric brake request signal is able to be processed, and the electric motor and the element are controllable.

Abstract: The motor/pump unit (10) comprises an electromotor (12) and at least one pump (14) for delivering brake fluid. The electromotor (12) has a motor stator (16) in which a motor rotor (18) is rotatably disposed. The pump (14) is disposed substantially within the motor rotor (18) and can be driven by the latter. In order to provide a vehicle brake system with a motor/pump unit (10) which is capable of delivering brake fluid in a highly dynamic fashion, the motor stator (16) and at least one section (22) of the motor rotor (18) which is directed towards the motor stator (16) define an electromagnetic region (16, 22, 24), and at least the pump (14) defines a hydraulic region (14, 26), wherein at least one sealing element (28, 96, 98) is provided which separates the electromagnetic region (16, 22, 24) from the hydraulic region (14, 26) in a fluid-tight fashion.

Abstract: The present invention relates to an improved hydraulic brake system for controlled and comfortable braking operations which includes a hydraulic pump for build-up of a hydraulic pressure that effects braking and a valve assembly by way of which the hydraulic pressure can be reduced, the hydraulic system being in particular characterized in that the valve assembly is an analog valve, and in that the analog valve and the hydraulic pump are adapted to be actuated by a control device in such a manner that the brake pressure for comfort braking can be increased or decreased in an essentially continuously variable manner.

Abstract: The present invention relates to a hydraulic type brake system which includes a unit for adjusting a back pressure in a turn driving hydraulic circuit mounted in a construction heavy equipment such as an excavator, etc., and in particular to a hydraulic type brake apparatus which is used together with a relief valve installed various actuator driving hydraulic circuits for adjusting a back pressure in a lower flow side of a relief valve for thereby adjusting an opening pressure of a relief valve. There is provided a back pressure adjusting unit adapted to adjust an opening pressure of the relief valve by adjusting a back pressure of the hydraulic circuit in a lower flow portion of the relief valve based on a co-operation with the actuator.

Abstract: An actuating unit (1) for a wheel brake (2) of a motor vehicle has a hydraulic pump (12), which can be driven at variable speeds by an electric motor (11) and supplies pressure fluid from a storage tank (22), and has an element (24), which adjusts a return flow of pressure fluid to the pump (12) and is disposed between the pressure side (13) and the suction side (16) of the pump (12). In addition, a cylinder-piston unit (3) is provided, which is for pressing a brake lining (7) against a friction element (8) connected to a vehicle wheel. For purposes of controlling the brake pressure as a function of wheel slip, a pressure increase valve (18) and a pressure decrease valve (21) are disposed between the pump (12) and the cylinder-piston unit (3). In addition, a control unit (29) is provided, which can process electrical brake request signals and slip signals and can control the electric motor (11), the element (24), and the valves (18, 21).

Abstract: A vehicle hydraulic brake apparatus includes a controller and a hydraulic pressure detector which detects a master cylinder hydraulic pressure produced by a master cylinder. The controller compares the master cylinder hydraulic pressure detected by the hydraulic pressure detector with a predetermined pressure value, implements operation of the auxiliary hydraulic pressure source when the depressing operation of the brake operating member is judged to be in a stage where the detected master cylinder hydraulic pressure is above the predetermined pressure value, and terminates the operation of the auxiliary hydraulic pressure source when the master cylinder hydraulic pressure detected by the hydraulic pressure detector is stabilized at an approximately fixed pressure value after being increased.

Abstract: A method and device used to drive a pump of a brake system according to the requirements are described. According to FIG. 3, the pump motor achieves full drive for time TAnstMax (t1-t0) following a braking request from a brake system. During the subsequent clocked driving action (starting at t1), drive signal UP is subjected to pulse width modulation (t7-t1) based on a direct comparison between motor voltage UM and a voltage threshold value Us (e.g., t4). Due to a subsequent comparison between motor voltage UM and a safety threshold Uss (e.g., t7), and the resulting full drive for TAnstMax (e.g., t9-t8), an increased load on the pump causes the latter to produce the necessary delivery capacity. In addition, a selectable maximum off-time TPausMax (e.g., t3-t1) of the pump motor guarantees a minimum pump on-time TPeinMin (e.g., t2-t3) per drive cycle TTakt (e.g., t2-t1).

Abstract: A brake system in which a hydraulic fluid can be conveyed from an accumulator via a valve into individual wheel brake cylinders, the hydraulic fluid being conveyed by a pump into the accumulator, having a pressure sensor arranged on the outlet side of the pump for detecting pressure pulsations in the hydraulic fluid arising in the operation of the pump and having an arrangement for evaluating the pressure pulsations in order to obtain a measuring signal for controlling and/or monitoring the pump.

Abstract: An hydraulic brake system that rapidly and precisely slows or reduces speed by constraining or stopping the movement of a link mechanism connected between a piston and a rotational driving shaft of a power system with physical force generated due to the incompressible fluid characteristic by constraining or stopping the flow of oil filled in an hydraulic oil chamber. The hydraulic brake system includes a lubricating section for supplying the oil reserved in a protective casing to friction sliding parts of respective components through pumping movement by utilizing the reciprocal movement of a piston rod, and an oil supplement section for supplementing the hydraulic oil chamber with the oil. The hydraulic brake system has improved durability and anti-abrasion, and provides emergency braking in the event of oil leakage.

Abstract: A vehicle has a hydraulic utility system for supplying a pressurized fluid to a number of user devices, including two axles, each having at least one wheel; and a brake assembly for each of the axles; a valve being provided to feed the pressurized fluid of the hydraulic system directly to one of the two brake assemblies in response to a signal from the other of the two brake assemblies.

Abstract: A method of brake pressure adjustment in a vehicle brake system equipped with an electric hydraulic pump comprises the following steps: detecting a prevailing brake pressure or determining a nominal pressure, and actuating the pump by degrees according to the detected brake pressure or the nominal pressure. In a method of opening an inlet valve of a hydraulic vehicle brake system, a pressure rise on the inlet side of the inlet valve is generated when the difference between the outlet-side and the inlet-side pressure on the inlet valve exceeds a positive threshold value.