Abstract: An actuating device, particularly for actuating valves that can be connected externally, includes a housing (10) and a coiled body (12) in the housing and having a coil winding (14). The winding encloses a pole tube (16) at least partially, having a pole core (20) connected at its free end. An armature (22) is guided in a longitudinally displaceable manner at least in the pole tube (16) within an armature chamber (24) and interacts with an actuating device (26) for actuating a valve part. The actuating part (26) is guided within the pole core (20) along an annular body (92), sealing the inside of the pole core (20) and the pole tube (16) relative to the surrounding area.

Abstract: An actuating device, particularly for actuating valves connected externally, includes a housing (10) and a coil body (12) arranged in the housing. The coil body has a coil winding (14) at least partially enclosing a coil tube (16), a pole core (20) connected at the coil tube free end, an armature (22) guided in a longitudinally displaceable manner at least in the pole tube (16) within an armature chamber (24) and interacting with an actuating part (26) for actuating the respective valve part. The pole tube (16) is designed as a receiving sleeve for the armature (22). The sleeve is fixed with its free end region to a fixed bearing point. The fixed bearing point is formed by two support parts (118, 124) of the pole core (20) that delimit a receiving gap between them, in which the free end region of the receiving sleeve is fixed in a clamped manner.

Abstract: A solenoid valve for controlling a fluid includes an armature having a base region, a lateral region and a head region. The solenoid valve includes a valve member connected to the armature. The solenoid valve further includes an armature casing component in which the armature is positioned. A flow path is formed between the armature and the armature casing component, the flow path extending from a lower armature space to an upper armature space and back to the lower armature space. A junction region is arranged between the head region and the lateral region. The junction region has at least one groove formed therein to facilitate an overflow between the lateral region and the head region.

Abstract: A valve module, in particular a solenoid valve for a brake system of a motor vehicle, is disclosed. The valve module includes an essentially cylindrical-shaped valve base body in which a valve needle is arranged in an axially displacable manner, and a housing cap which closes the valve base body on one end. The cap is maintained on the valve base body by at least one holding device. The maintaining device includes at least one recess on the outer surface of the cover of the valve base body into which plastically deformed material of the housing cap is introduced. A method for producing this type of valve module is also disclosed.

Abstract: An electromagnetically actuated valve including a solenoid with a coil that generates a magnetic field upon being energized, a tubular member made of a non-magnetic material and disposed on an inner circumferential side of the coil, a movable valve body disposed within the tubular member and movable in an axial direction of the tubular member by an attraction force that is generated upon energizing the coil to thereby open and close a fluid passage, a first member made of a resin material and including a seat portion that is brought into contact with the movable valve body to close the fluid passage, and a first biasing member that biases the movable valve body toward the seat portion.

Abstract: Disclosed is a solenoid valve, the valve housing of which has a thick-walled tubular body (4) for fastening in a valve receiving bore (11), which thick-walled tubular body (4) is connected to thin-walled sleeve (1). The thin-walled sleeve (1) has a radially circumferential collar (2) which makes contact with an inner shoulder (3) in the tubular body (4), and for the tubular body (4) to have a recess (5) at a radial spacing from the inner shoulder (3) The radial spacing is selected in such a way that a plastically deformable banded collar (6) remains between the inner shoulder (3) and the recess (5) on the tubular body (4). As a result, a frictional, tight connection of the tubular body (4) with the sleeve (1) is possible.

Abstract: A hydraulic brake system equipped for anti-slip control and for active brake interventions has a self-priming pump. A pressure retention valve prevents the brake system's low-pressure accumulator and the wheel brakes from being evacuated below atmospheric pressure during a sensitive brake operation. A two-position valve deactivates the bias of the pressure retention valve by opening a fluid path from the low-pressure accumulator to the pump when it is desired that the wheel brakes be retracted farther to reduce drag and excessive wear of the brake friction elements.

Abstract: A valve assembly, which houses a valve closing member that co-operates with an armature to connect or separate pressure medium channels in a valve housing, the member being directed towards a valve seat which is situated on a valve seat body fixed in the valve housing. The valve assembly includes a solenoid for actuating the armature which is pushed onto a non-magnetisable sleeve section of the valve housing and a magnetic core that is diametrically opposed to the armature in the valve housing. Various valve functions can be achieved by using identical valve components in a modular manner.

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: The invention is based on a hydraulic unit for regulating the brake pressure in a vehicle brake system. Hydraulic units of such a type are the core component of an anti-lock vehicle brake system, of a drive slip vehicle brake system or of a vehicle brake system which regulates driving stability. The invention proposes a particularly advantageous arrangement of the required recesses in a housing block of a hydraulic unit. On account of the arrangement, the housing block can be reduced in terms of its dimensions, and can be produced with a lower weight and more simply in terms of production. For this purpose, according to the invention, the pressure fluid connection from one of the ports of the master brake cylinder to the suction side of one of the pump elements extends through the valve receptacle of the switching valve.

Abstract: The invention relates to a pump element for installation in a pump bore of a hydraulic block, which includes a pump plunger, a restoring spring for the pump plunger, and an inlet valve having an inlet valve cover, in which a closing spring and a closing body are arranged. According to the invention, the inlet valve cover has a high pressure sealing section, which rests against the valve seat element in the axial direction with spring force support provided by the restoring spring. The valve seat element is positively connected to the pump plunger at least before installation of the pump element in the pump bore. Centering elements are provided for centering the inlet valve cover relative to the valve seat element. The invention further relates to a hydraulic block and to an installation method.

Abstract: The invention relates to a solenoid valve with a magnet assembly and a valve cartridge having a pole core, a valve insert connected to the pole core, an armature which is guided within the valve insert in an axially movable manner between a closed position and an open position and is coupled to a closing element, and a valve body which is connected to the valve insert and has a main valve seat which is arranged between at least one first flow opening and a second flow opening. The axially movable armature, when the magnet assembly is energized, is moved by a generated magnetic force within the valve insert in the direction of the pole core counter to a spring force of a resetting spring and counter to a fluid force in order to lift the closing element out of the main valve seat; and to permit a flow of fluid between the at least one first flow opening and the second flow opening.

Abstract: To achieve a specifiable, and thus reproducible final pressure in at least one part of the brake circuit, the pump is first actuated for pressure buildup or pressure reduction when the valve is closed. When a first specified setpoint pressure is reached, or when a pressure threshold value is exceeded, the valve is put into an open position using a first actuation. After the pump is switched off, the actuation of the valve is modified in such a way that, during a specifiable time, a continuous change of the first actuation is undertaken all the way up to a second actuation, in which the valve assumes a holding position, particularly while taking into consideration the pressure difference which prevails at the valve.

Abstract: A solenoid valve includes a solenoid coil, a yoke of magnetic material, an armature of magnetic material to move in an axial direction of the solenoid coil when the solenoid coil is energized, a plunger to be moved with the armature, a valve seat member including a seat portion formed with a valve hole to be closed and opened by a forward end portion of the plunger, and a coil spring which is disposed between a spring receiving portion of the plunger and the valve seat member, around the plunger. The plunger includes a pressure receiving portion (such as a flat portion) which extends in a radial direction of the plunger at a position between the forward end portion and the spring receiving portion of the plunger, and which faces to the seat portion.

Abstract: A solenoid valve having a magnet assembly and a valve cartridge includes a capsule and a valve insert connected to the capsule. An armature, that is movably disposed within the capsule, includes a tappet having a locking element and a main sealing element. A valve body having a main valve seat is pressed into the valve insert, wherein a magnetic force generated by the magnet assembly axially moves the armature against the force of a return spring and plunges the main sealing element into the main valve seat in a sealing manner. The valve body includes an open end which acts as a spring support for the return spring, wherein the return spring is disposed outside of a fluid flow path present between the opened main valve seat and at least one radial downstream opening in the valve body.

Abstract: In a vehicle braking apparatus, a pressure control valve is controlled according to a brake operation amount of a brake pedal to thereby regulate hydraulic pressure and supply it to wheel cylinders. By controlling the pressure control valve by using hydraulic pressure output from a master cylinder as pilot pressure, the hydraulic pressure can be regulated and supplied to the wheel cylinders. A master cut valve capable of opening and closing a first hydraulic pipe that supplies the hydraulic pressure from the master cylinder to the wheel cylinders is provided. An external pressure supply pipe that supplies the pilot pressure to the pressure control valve is connected to the first hydraulic pipe on a side of the master cut valve closer to the wheel cylinders.

Abstract: A conical portion is provided at the tip of a main valve body. When brake fluid hits the conical portion of the main valve body, the brake fluid is bounced back at substantially the same angle at which it hits the conical surface of the conical portion. However, the movement direction of the bounced brake fluid is not largely inclined from the direction that the brake fluid is to be caused to flow. Therefore, the flow resistance is reduced. Further, generatrices of the conical portion agree with tangent lines to the spherical surface and the boundary area between the spherical surface and the conical surface is continuous without a step. Therefore, the brake fluid is rectified by these surfaces when it flows. It is possible to reduce the amount of fluctuation in pressure differential relative to fluctuation in the flow rate of brake fluid.

Abstract: The invention relates to a valve cartridge for a solenoid valve, having a capsule, a valve insert that is inserted by a first end into the capsule and on its other end receives a valve body with a main valve seat. A lower valve part is axially braced on the valve insert, and a flat filter for filtering out dirt particles is connected via a retaining element to the lower valve part. According to the invention, the retaining element includes at least one component on the flat filter side and at least one corresponding component on the lower valve part side, which makes at least one partial clamping connection between the flat filter and the lower valve part. The invention further relates to a solenoid valve having such a valve cartridge.

Abstract: A method is for closing a solenoid valve in which the solenoid valve is charged with a first current value that results in a first closing of the solenoid valve, and the solenoid valve is subsequently charged with a second current value that results in a renewed partial opening of the solenoid valve, and the solenoid valve is subsequently charged with a third current value that results in a second closing of the solenoid valve, the third current value being selected such that the second closing takes place with a higher closing speed of the solenoid valve than does the first closing.

Abstract: The invention relates to a valve cartridge for a solenoid valve having a capsule, a magnetic armature that is movably guided within the capsule, a valve insert inserted into the capsule at a first end, and a valve body, which is pressed into a second end of the valve insert, and having a main valve seat. The magnetic armature, moved by a generated magnetic force, moves a tappet that is guided within the valve insert. The tappet has a locking element which includes a sealing element which plunges into the main valve seat of the valve body in a sealing manner for carrying out a sealing function, and an associated solenoid valve. According to the invention, the valve insert is configured as a slotted bushing, having a collar integrated onto the second end of the valve insert in order to increase an outer diameter and a shape stability of the valve insert.

Abstract: A wheel braking controller of a vehicle includes a brake lever operated by a rider, a master cylinder generating a hydraulic pressure according to an operation force of the brake lever, and a brake caliper braking a front wheel based on operation of the brake lever, a channel switching unit provided between the master cylinder and the brake caliper and switching channels of a brake fluid. A hydraulic pressure generator generates a hydraulic pressure based on operation of the brake lever and the driving state of the vehicle and controlling braking of the front wheel using the brake caliper by the hydraulic pressure. A braking controller including the channel switching unit and the hydraulic pressure generator is integrally provided on one body. The wheel braking controller so configured reduces the number of parts, and provides for easy mounting of the controller on the vehicle body.

Abstract: A brake hydraulic pressure control apparatus includes a reservoir, a brake hydraulic pressure supply device, a hydraulic pump, a plurality of wheel cylinders, a cut valve, a plurality of pressure-increasing solenoid valves, a plurality of pressure-decreasing solenoid valves, a discharge passage including a plurality of relief passages and a circulating passage, a controlling device bringing a brake hydraulic pressure to be applied to the wheel cylinders from the hydraulic pump by disconnecting the brake hydraulic pressure supply device from the wheel cylinders by the cut valve while the pressure-increasing solenoid valves are in an open state, and bringing the brake fluid within the wheel cylinders to be circulated to the reservoir via the discharge passage by operating the pressure-decreasing solenoid valves, and a pulsation transmission decreasing device provided at the discharge passage and decreasing a transmission of a pressure pulsation generated by at least one of the pressure-decreasing solenoid valve

Abstract: A hydraulic device includes a housing and a solenoid valve to be mounted to the housing. The solenoid valve includes a plunger and a plunger-mounting sleeve in which the plunger is mounted. The plunger-mounting sleeve includes a sleeve member and a sleeve flange having a flange portion and a cylindrical portion provided at the radially outer edge of the flange portion. The plunger-mounting sleeve is fixed to the housing by seating a flange portion of the sleeve flange on a shoulder formed on a mounting hole formed in the housing, press-fitting a mounting ring loosely fitted around the sleeve member into the cylindrical portion of the sleeve flange, thereby pressing the flange portion against a seating surface of the shoulder, and further wedging the cylindrical portion into the inner periphery of the mounting hole.

Abstract: An anti-lock braking hydraulic unit for a vehicle includes a body with actuator-side and brake-side ports. Inlet and outlet valves are positioned in the body and operable to selectively supply and relieve hydraulic fluid to/from the wheel cylinder of a brake via the brake-side port. An accumulator is fluidly coupled with the outlet valve to receive hydraulic fluid relieved from the wheel cylinder. The accumulator includes a bore formed in the body and an orifice formed in the body in fluid communication with the bore. The orifice is positioned at a first end of the bore, and a closure is sealingly engaged with a second end. A piston is sealingly received in the bore, movable within the bore along an axis defined thereby and dividing the bore into first and second variable volume chambers. At least one ferromagnetic pair magnetically biases the piston toward the first end of the bore.

Abstract: There is provide a brake control technology according to which a target hydraulic pressure is reliably achieved when a hydraulic pressure is decreased during hydraulic control and brake drag does not occur even when the target hydraulic pressure is zero. In a brake apparatus, a dead-band region is set for the target hydraulic pressure that is used in the hydraulic control. When braking control is switched from the hydraulic control to regenerative control in cooperative braking control, residual pressure reduction control is executed. In the residual pressure reduction control, the target hydraulic pressure is set to a value that is lower than zero to which the hydraulic pressure should be brought.

Abstract: A solenoid valve for a brake system enabling miniaturization of the valve and having an improved configuration to facilitate assembly and production of the valve. The solenoid valve includes an armature provided at one end thereof with an opening/closing member, a valve housing including a hollow first valve block fixed in a modulator block and a second valve block disposed below the first valve block and having an inlet for introduction of fluid, a valve seat installed in the first valve block and having a flow-hole to be opened or closed by the opening/closing member and a hollow extending longitudinally from the flow-hole, and an orifice sleeve located in the second valve block to define a fluid discharge passage and having an orifice formed in one end thereof to communicate with the hollow of the valve seat.

Abstract: Pivotally mounted doors forming the floor of a railroad car are prevented from opening inadvertently through not allowing fluid pressure to be applied to a door opening piston until the fluid pressure exceeds a predetermined amount. A control valve can control the position of a spool.

Abstract: In a brake system including a master cylinder and an electrically-driven hydraulic pressure generator with front and rear pistons, when the hydraulic pressure generator cannot be operated and a failure of a first hydraulic system linked to a rear fluid chamber of the generator occurs and makes a first hydraulic system open to the atmosphere, the brake-fluid pressure of a second hydraulic system transmitted from the master cylinder to a wheel cylinder via a front fluid chamber of the generator is used to perform braking. A forward-facing third front cup seal provided at an intermediate portion of the front piston prevents the brake-fluid pressure generated by the master cylinder from leaking out from a front supply port via the rear fluid chamber. At the same time, a stopper prevents the pressure of the front fluid chamber from moving the front piston excessively backward. The braking is accordingly secured by use of the second hydraulic system linked to the front fluid chamber of the motor cylinder.

Abstract: An electromagnetic pressure regulating valve has a valve portion for conducting and regulating the pressure of an operating medium, such as oil, a magnet portion for actuating the valve portion for regulating the pressure of the operating medium and having a magnet housing, in which a magnet core is located that as needed exerts magnetic force on an armature, located in the magnet housing, a spring with a spring force generating a pressure activation threshold to be overcome upon regulation and located between the armature and an adjusting ball that is located in a pole piece of the magnet housing, and the spring has regions of different diameter.

Abstract: According to a solenoid valve of the invention, which is fitted in a pump housing, when ABS/TCS/ESP operate, a valve body with a plunger that forms the internal channel with a plunger seat is formed in a simple cylindrical shape to reduce a cycle time and manufacturing cost while a seat housing that is manufactured by pressing, in which a filter and plunger seat forming an internal channel are assembled is fitted in a vale body by staking. Accordingly, a laser welding is not needed and the length of the end portion of valve body is reduced, such that the entire length is reduced and the weigh is reduced as well.

Abstract: Disclosed is a valve for an anti-lock brake system, in which a sleeve sheet is assembled with a lower portion of a valve housing, so that the external shape and the structure of the valve are simplified. The valve includes a valve core; an armature positioned below the valve core and provided at an end thereof with a ball; a cylindrical sleeve coupled with outer peripheral surfaces of the valve core and the armature to guide an up/down movement of the armature; a first elastic member installed between the valve core and the armature; a valve housing coupled to one end of the cylindrical sleeve and formed therein with a hollow section that extends lengthwise along the valve housing; a valve seat press-fitted into the hollow section and formed with a first orifice which is open/closed by the ball; and a filter seat press-fitted into the valve housing and provided with an inlet and an outlet, which are positioned at a circumferential portion and a lower portion of the filter seat, respectively.

Abstract: A vehicle brake hydraulic pressure control unit including a base body including a brake fluid flow path and a mounting hole portion having a bottom sealing surface and an inner circumferential sealing surface and an assembled part which is assembled into the mounting hole portion so as to communicate with the flow path. The assembled part includes a lower end sealing portion hermetically contacting with the bottom sealing surface of the mounting hole portion to form a lower side sealing portion and an outer circumferential sealing portion hermetically contacting with the inner circumferential sealing surface of the mounting hole portion to form a circumferential sealing portion. A hermetic accommodation space is defined by the lower side sealing portion and the circumferential sealing portion.

Abstract: The shock and vibration isolation system for hard mounting of a manifold of a brake control valve protects the brake control valve manifold from shock and vibration by incorporation of shock and vibration isolators in mounting feet of the manifold. The shock and vibration isolators have a pre-selected natural frequency chosen to protect components of the brake control valve damaging shock and vibration. The shock and vibration isolators each include a silicone rubber insert portion, a first outer sheath secured about a first end of the silicone rubber insert portion, a second outer sheath member secured about a second end of the silicone rubber insert portion, with a gap between the first and second outer sheaths.

Abstract: Disclosed herein are a solenoid valve for a brake system and a manufacturing method thereof, to achieve easy manufacture and low manufacturing costs via a more simplified configuration than the related art. The solenoid valve includes a valve core, a sleeve into one side of which the valve core is inserted, an armature movably received in the sleeve, a seat having an orifice that is opened or closed by the armature, a return spring to press the armature toward the orifice, a filter member press-fitted in a modulator block having an inlet path and outlet path, a filter being coupled to the filter member, and a seat housing having one side press-fitted into the filter member and the other side press-fitted into the sleeve, the seat being press-fitted in the seat housing. The seat housing takes the form of a tubular member having an approximately constant thickness and is provided with a stepped portion to determine a position of the seat.

Abstract: The invention relates to a device for suspending a unit, especially a hydraulic unit of an electronically traction-controlled brake system of a motor vehicle. The unit is suspended in a receptacle provided on the vehicle such that vibrations are damped. Hydraulic units of vehicle brake systems are usually equipped with an electric motor for driving pumps located in the hydraulic unit. The brake pressure in the wheel brakes can be modulated via the pumps. The pump drive can cause mechanical and hydraulic vibrations in the unit which can result in unwanted operational noise in case the vibrations are transmitted to the vehicle body without being damped. The improved device is manually preloaded due to limited space for using tools. A clamping mechanism is guided in an axially movable manner on an armature which is fixed to the hydraulic unit and which can be moved from a basic position into a clamping position. The clamping mechanism is interlocked with the armature in both positions.

Abstract: A solenoid valve for a brake system, which has a simple constitution and can be easily manufactured with reduced manufacturing costs, is disclosed. A valve core is formed in a cylindrical shape, and has a through-hole formed in a longitudinal direction of the valve core and a fluid passage formed in a radial direction of the valve core so as to communicate with the through-hole. A sleeve is coupled to an outer surface of the valve core. The sleeve has a dome-shaped shielding portion at one end, and a flange portion to be fixed to a modulator block at the other end. An armature is slidably mounted in the sleeve. An exciting coil is provided to move the armature. A valve seat is fixed in the valve core, and has a first orifice. A plunger is mounted in the valve core. The plunger moves by movement of the armature to open or close the first orifice. A restoring spring is provided to press the plunger toward the armature.

Abstract: A brake apparatus for a vehicle has a master cylinder (11) having a front pressure chamber (R1) and a rear pressure chamber (R2) defined by a drive piston (13) in a cylinder (12). The brake apparatus also has a pressure control valve (44) which can output a control pressure obtained by adjusting a hydraulic pressure from an accumulator (42) to the rear pressure chamber (R2) and wheel cylinders (21RR and 21RL) by coupling wheel cylinders (21FR and 21FL) to the front pressure chamber (R1) and moving a drive valve (56) by an electromagnetic force based on a target control pressure, and which can output a control pressure obtained by adjusting a hydraulic pressure from the accumulator (42) by moving the drive valve (56) by an external piston (58) that is moved by an external pressure from the front pressure chamber (R1), to the rear pressure chamber (R2) and wheel cylinders (21RR and 21RL).

Abstract: Pivotally mounted doors forming the floor of a railroad car are prevented from opening inadvertently through not allowing fluid pressure to be applied to a door opening piston until the fluid pressure exceeds a predetermined amount. A control valve can control the position of a spool.

Abstract: A base body has flow path configuring portions, has inlet and outlet ports, a central mounting hole 31, a central flow path 51 penetrating the central mounting hole 31, first inner and outer mounting holes 32, 33 disposed upstream side of the central mounting hole 31, second inner and outer mounting holes 34, 35 disposed downstream side of the central mounting hole 31, a third mounting hole 36 disposed below the second outer mounting hole 35, a wheel side sensor mounting hole 46 disposed on an extension of the outlet port 22L between the first inner mounting hole 32 and the second inner mounting hole 34, and a hydraulic pressure source side sensor mounting hole 45 disposed on a center line X of the base body so as to straddle to extend to the flow path configuring portions across the center line X.

Abstract: Disclosed is a solenoid valve having a magnet unit and a valve cartridge having a capsule, an armature guided longitudinally in the capsule and connected to a sealing pin guided longitudinally inside a valve insert, and a valve body with a sealing seat; a magnetic force generated by the magnet unit moves the armature together with the sealing pin from an initial position toward the valve body counter to the force of a return spring, causing the sealing pin to move into and close the sealing seat in an end position, where the initial position represents a maximum volumetric flow between a valve inlet and a valve outlet. A spring support is embodied and situated so that the return spring is supported outside the volumetric flow and presses the armature into the initial position against the capsule, and the inlet and outlet are embodied and situated so that the direction of the volumetric flow assists the closing motion of the armature with the sealing pin.

Abstract: A piston accumulator (10) comprises a pressure chamber (40) which on one side is closed by a piston (50) axially displaceable in a pipe (20) in order to change its volume depending on the axial position of the piston (50). A detent mechanism is provided in order to hold back the piston (50) against a spring preload (190) in a second position differing from a first position. The piston (50) is formed in a multi-part fashion and comprises at least a first piston part (52) and a second piston part (54), wherein at least one of the two piston parts (52) is hardened and disposed to cooperate with the detent mechanism in a catching fashion.

Abstract: A method for activating a two-stage switching valve including a first stage which has a small flow cross-section and a second stage which has a larger flow cross section, the switching valve being situated between a main brake cylinder and a hydraulic pump in a hydraulic brake system. The pressure equalization knock on opening the switching valve is substantially reduced by activating the switching valve in a first control phase via a control signal having a low amplitude, due to which only the first stage of the valve is first opened, and by activating the valve in a second phase via a control signal having a higher amplitude.

Abstract: A piston accumulator (10) comprises a pressure chamber (40) which is closed on one side by an axially shiftable piston (50) in order to change its volume depending on the axial position of the piston (50). A locking mechanism is provided for retaining the piston (50) in a second position different from a first position against a spring preload (190). The piston accumulator (10) further comprises an electromagnetic apparatus (80) having an armature (150) which is shifted upon axial shifting of the piston (50) from the first into the second position in its turn into an axial position in which a blocking element (175) of the locking mechanism is held by the armature (150) in a radial position so as to block a shift of the piston (50) back in the direction of its first position. For holding the blocking element (175) there is provided a separate interlocking member (170) which is fastened to the armature (150) and is made of a harder material than the armature (150).

Abstract: During normal operation of a braking force generating device, the wheels are braked by braking force generating device when a depressing force cut-off valve is closed by energizing its solenoid to cut off communication between a master cylinder and wheel cylinders. When an abnormality occurs, a master cylinder generates a brake fluid pressure upon a driver's braking operation, and supplies it to the wheel cylinders when the depressing force cut-off valve is opened by de-energizing its solenoid. When the depressing force cut-off valve is closed, such as during normal operation, since the depressing force cut-off valve functions as a one-way valve that is urged in a valve-closing direction due to a brake fluid pressure generated by the master cylinder, an electromagnetic force generated by the solenoid is smaller, thereby reducing the power consumption of the solenoid.

Abstract: A valve control unit including three valve units for two brake channels of an electropneumatic brake system is provided. Each valve unit is embodied as a valve modulator device for a braking pressure control circuit including an air inlet valve with a primary solenoid and a bleed valve with a secondary solenoid. Each modulator device armature includes a common solenoid guide arrangement controlled by the magnetic flux of a common magnetic coil. Independent operation of the armatures is achieved whereby flux through the secondary solenoid is weakened by a shunt in the flux circuit which causes a switching delay for the secondary solenoid relative to the primary solenoid. The magnetic resistance of a non-magnetic disc effects switch-off acceleration in the flux circuit with energized secondary solenoid, weakens the field and causes the secondary solenoid to revert to a spring-loaded base state at a higher flux than the primary solenoid.

Abstract: The present invention provides a non leak check valve typed traction control valve. A low pressure check valve 8, which is provided in a pressure rise channel independent of a main oil passage of a TCV (Traction Control Valve), is opened during the normal braking when a driver operates a brake. Accordingly, oil pressure corresponding to the degree of braking is quickly provided. Further, when the TCS (ESP) is operated on the basis of signals from various sensors for the purpose of stably driving a vehicle even though the brake is not operated, the low pressure check valve provides an excellent airtight seal against the pressure rise channel. Therefore, pressure capable of controlling a wheel cylinder is sufficiently maintained at low pressure (10 bar or less).

Abstract: Disclosed herein is a solenoid valve for a brake system to reduce manufacturing costs via a shorter length and more simplified configuration of a magnet core. In the solenoid valve for a brake system to be mounted in a bore of a modulator block having an inlet and an outlet, the solenoid valve includes a magnet core having a center longitudinal penetrating hole and an entrance and exit for oil flow, an armature movably provided at one end of the magnet core and serving to open or close the exit, a valve seat provided at the other end of the magnet core, and a sleeve in which the armature and magnet core are received, the sleeve being fixed to the bore.

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: A seal for an automatic transmission (12) having mechatronics with an electronic module (14) and an electro-hydraulic control unit. The electronic module (14), when installed, is electrically connected, via terminal connectors (20), with at least one actuator (16) and/or sensor of the electro-hydraulic control unit. The seal is inserted between the electronic module (14) and at least one actuator and/or sensor and consists of an elastically moldable soft material element (10).

Abstract: A service brake/traction control valve includes a service brake control port, a traction control port, an exhaust port, and a control chamber. The control chamber fluidly communicates with the service brake control port and the traction control port as a function of a service brake event and as a function of a traction control event. The control chamber fluidly communicates with the exhaust port when the service brake event is released. The control chamber fluidly also communicates with the exhaust port when the traction control event is released.