Abstract: Normally opened control valves 5A, 5B are configured into short-time rating valves, and normally opened opening/closing valves 4A, 4B, which are electrically controlled to open and close and are configured into long-time rating valves, are connected in series to the normally opened control valves 5A, 5B between a fluid pressure generating unit M and wheel brakes 8A to 8D.

Abstract: This disclosure teaches a magnet valve, having a valve insert and a tappet which is guided movably via a tappet guide in the valve insert and which is braced via a restoring spring on a valve body, and the restoring spring acts between a first contact face of the tappet and a second contact face on the valve body. According to the invention, fixation means which define a position of the restoring spring relative to the tappet and the valve body are disposed on the second contact face of the valve body.

Abstract: A hydraulic brake system for a vehicle includes a brake having a wheel cylinder that applies a braking force to a wheel, and a pressurizing device. The pressurizing device pressurizes the brake liquid and includes a suction portion for sucking a brake liquid, and additionally includes an output portion connected to the wheel cylinder. A linear solenoid valve includes at least one housing, and is connected to the wheel cylinder and to the suction portion of the pressurizing device. The solenoid valve includes a valve portion having a reciprocating valve member and a valve seat opposed to the valve member. A biasing member biases the valve member in one direction and a solenoid applies a drive force to the valve member in an opposite direction. In addition, a hydraulic-pressure-decrease restraining device restrains a decrease of pressure of the brake liquid in the housing.

Abstract: A solenoid valve for a slip control system in a vehicle is disclosed. A flow passage is provided in which working fluid such as oil that generates a break hydraulic pressure flows from the side of a solenoid valve through a filter, flows to the front of a plunger through a side hole formed in a valve body of the solenoid valve, and then flows along the side of valve body, that is, is discharged out of an outlet through a side space between valve body and a valve seat. Therefore, linear pressure control is easy because working fluid flows into toward the front of valve plunger through a side inlet of solenoid valve and the entire size is reduced because a special channel for guiding working fluid to the front of the valve plunger is not needed in a pump housing case.

Abstract: The invention provides a brake control apparatus that improves the controllability of a vehicle in the control for restraining slip of the wheels. The brake control apparatus includes: wheel cylinders that apply braking force individually to wheels by supplying a working fluid; retention valves that are provided respectively upstream of the wheel cylinders and that are opened and closed so as to restrain slip of the wheels; a common control valve provided upstream of the retention valves to supply the working fluid to the wheel cylinders; and a control portion that controls the common control valve by different control laws to restrain fluctuations in pressure on a primary side of the retention valves caused by fluctuations in a capacity to which the working fluid from the common control valve is supplied, by opening or closing of the retention valves.

Abstract: A brake system and a brake device for use with automobiles is provided in which braking energy stored in an auxiliary pressure source can be effectively used for braking, even if an electrical system fails. The vehicle brake system includes a proportional pressure control valve for generating braking liquid pressure by adjusting the braking energy stored in the auxiliary pressure source. A passage transmits the liquid pressure generated by a brake pedal stroke, a switching valve opens the passage in the powered condition and closes the passage in the off-powered condition, and an auxiliary control portion activates the proportional pressure control valve. Even in the off-powered condition, the high pressure accumulated in the auxiliary pressure source can be used to adjust the required braking liquid pressure at the proportional pressure control valve.

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 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: A failure detecting apparatus for detecting a failure of a solenoid-operated control valve having a coil, a valve chamber, and a movable member which is movable, while changing a volume of the valve chamber, by an electromagnetic drive force produced upon supplying of an electric current to the coil, so that the solenoid-operated control valve is selectively placed in one of an open state thereof and a closed state thereof, the failure detecting apparatus including a pressure-change detecting device which detects a change of a pressure on at least one of a high-pressure side and a low-pressure side of the solenoid-operated control valve; and a failure detecting portion which detects that the solenoid-operated control valve has failed, when a change of the pressure detected by the pressure-change detecting device upon controlling of the electric current supplied to the coil is smaller than a change of the pressure that results from a change of the volume of the valve chamber caused by a movement of the movable

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 solenoid valve for a brake system capable of being easily manufactured with reduced manufacturing costs is disclosed. A valve seat member has an inner passage formed through the valve seat member in a longitudinal direction thereof, an outer passage formed on an outer surface of the valve seat member in the longitudinal direction, and a seat portion formed with a first orifice above the inner passage. The seat portion is formed unitarily with the valve seat member. A sleeve is coupled on the outer surface of the valve seat member. The sleeve has a flange portion to be fixed to a modulator block. A valve core is coupled to a portion of the sleeve, opposite to the flange portion. An armature is slidably mounted in the sleeve. The armature has an opening/closing portion to open or close the first orifice. A restoring spring presses the armature toward the first orifice.

Abstract: A solenoid valve for use in an actuator for controlling brake hydraulic pressure includes a valve housing, a movable core having an integral valve rod and axially slidably received in the valve housing, and a valve body configured to be moved into and out of contact with a valve seat when the valve body moves. The solenoid valve further includes a yoke having a U-shaped section. The flanges of the yoke have first ends that extend substantially along the outer peripheral edges of the coil winding to minimize the length of the flanges and thus the length of the solenoid valve.

Abstract: A compressed air treatment device is designed to be installed in an industrial vehicle consisting of a motor vehicle that can pull a trailer. The device comprises a set of electropneumatic components that are controlled by an electronic command/control unit which is interfaced with a computer communication bus and with various electrical components (sensors, switches, etc.). The device is used in particular to manage the compressed air in terms of supplying the service braking circuit(s).

Abstract: Pressure regulating reservoirs are positioned in an upper portion of a housing, and pumps are positioned below the pressure regulating reservoirs. More specifically, the pressure regulating reservoirs are positioned in an upper portion of the housing so as to provide installation space in a lower portion of the housing. This installation space is used for positioning the pumps, and as a result it is possible to locate the pumps as far as possible toward the bottom of the housing.

Abstract: A valve for an anti-lock brake system in which a structure of a valve housing is modified, thereby reducing the manufacturing cost.

Abstract: A vehicular brake fluid pressure control unit includes a base block of aluminum material having a cylinder bore containing a piston and a return spring, and a cover member fixed to the base block to cover an open end of the cylinder bore. The cover member is formed with a vent hole opening into an atmospheric chamber in the cover member, and made of aluminum. material.

Abstract: A hydraulic brake pressure control apparatus has a hydraulic unit having a housing, a casing fixed to the housing, and a circuit board arranged in the casing. A resilient member is disposed between the housing and the casing such that the housing and the casing are separated from each other, in order to reduce vibration transfer from the hydraulic unit to the circuit board. A part of the resilient member is also disposed between a bolt inserted into a through-hole formed in the resilient member and the casing.

Abstract: A hydraulic brake device includes a hydraulic pressure supply passage for reducing the output hydraulic pressure by a first proportional solenoid valve and supplying it to a hydraulic passage leading from a pressure adjusting valve to the wheel cylinders, a second proportional solenoid valve disposed between the hydraulic pressure supply passage and the pressure adjusting valve for reducing the hydraulic pressure supplied from the hydraulic pressure supply passage, and a check valve parallel to the second proportional solenoid valve. Hydraulic pressure control during automatic brake control is carried out by the first and second proportional solenoid valves.

Abstract: A control valve includes a magnetic pole member. An armature is slidably supported relative to the magnetic pole member for movement between a fully open position and a closed position. A biasing spring is disposed between the magnetic pole member and the armature for forcing the armature away from the magnetic pole member. A coil is placed about the magnetic pole member and the armature for inducing a magnetic field for moving the armature toward the magnetic pole member. One of either of the magnetic pole member or the armature has a recess for non-contactingly receiving the other when the armature moves between the fully open and closed positions. The control valve can be embodied as a normally open valve or a normally closed valve. The use of dual lateral poles and triple lateral poles create a flat magnetic force versus travel curve thereby allowing for greater proportional control of the valve.

Abstract: The electro-pneumatic latching valve system having an electrical switch unit that further includes an “apply” or “activate” switch, a “release” or “deactivate” switch, and a power supply. A first solenoid valve is in electrical communication with the activate switch and a second solenoid valve is in electrical communication with the deactivate switch. A pneumatic latching valve is in pneumatic communication with the first and second solenoid valves and a source of pressurized control and supply air is in pneumatic communication with the pneumatic latching valve and the solenoid valves. A terminal device, e.g., a spring brake, is in pneumatic communication with the latching valve, and the device is released or applied in response to pressurized supply air delivered to the device through the pneumatic latching valve in response to pneumatic control signals delivered to the pneumatic latching valve from the solenoid valves.

Abstract: An improved valve for use in a heavy vehicle pneumatic braking and parking system is disclosed. The valve includes a solenoid coil assembly, a valve seat, an armature, and a spring. The solenoid coil includes a pole piece and produces a magnetic field when energized. The valve seat has a valve seat surface and defines a flow passage. The armature has a first end and a second end and includes a spherical shaped elastomeric seal sized to engage the valve seat to block air flow through the flow passage. The spring is engaged around an exterior of the armature and resiliently biases the armature toward the valve seat. When energized, the solenoid coil displaces the armature to an open position away from the valve seat and toward the pole piece to allow air flow through the flow passage.

Abstract: The present invention provides a proportional microvalve having a first, second and third layer, and having high aspect ratio geometries. The first layer defines a cavity with inlet and outlet ports. The second layer, doped to have a low resistivity and bonded between the first and third layers, defines a cavity having a flow area to permit fluid flow between the inlet and outlet ports. The second layer further defines an actuatable displaceable member, and one or more thermal actuators for actuating the displaceable member to a position between and including an open and a closed position to permit or occlude fluid flow. The third layer provides one wall of the cavity and provides electrical contacts for electrically heating the thermally expandable actuators. The thermal actuators and the displaceable member have high aspect ratios and are formed by deep reactive ion etching such that they are displaceable in the plane of the second layer while being very stiff out of the plane.

Abstract: An electromagnetically actuated valve including a housing having a fluid path and a valve retaining bore located in course of the fluid path, a tubular valve casing mounted to the valve retaining bore, a valve body electromagnetically operative to axially move within the tubular valve casing and allow and prevent a flow of fluid passing through the fluid path of the housing, and a filter disposed at an axial end of the tubular valve casing. The filter includes a fluid passage communicated with the fluid path of the housing.

Abstract: A solenoid valve includes a valve body defining a chamber that receives a plunger actuated by an armature, having flow path forming holes which are radially defined to serve as flow paths of a brake hydraulic line extending between a master cylinder and a brake mechanism, and fitted into a pump housing, a plunger seat accommodated in the valve body and applied with hydraulic pressure supplied from the master cylinder, a main check valve that opens and closes the flow paths through detachment and attachment between the contact end of the plunger and the plunger seat to switch flow of hydraulic pressure from the plunger seat through the valve body to the brake mechanism, and a return check valve to return oil in an axial direction, which is parallel to the plunger seat axially accommodated in the chamber and perpendicular to the flow path forming holes.

Abstract: A compressed air treatment device is designed to be installed in an industrial vehicle consisting of a motor vehicle that can pull a trailer. The device comprises a set of electropneumatic components that are controlled by an electronic command/control unit which is interfaced with a computer communication bus and with various electrical components (sensors, switches, etc.). The device is used in particular to manage the compressed air in terms of supplying the service braking circuit(s).

Abstract: An electromagnetic valve unit includes a yoke of magnetic metal. The yoke includes upper and lower walls that are integrally connected by side walls. A slit is provided by the upper wall of the yoke. The slit extends along a longitudinal axis of the yoke between axially opposed ends of the yoke. A plurality of electromagnetic valves are abreast installed in the yoke in such a manner that the yoke constitutes outside magnetic paths of solenoid coils of the valves. Each of the solenoid coils has terminal members that project outward from the yoke through the slit.

Abstract: In a fluid control apparatus having coil-supporting protruding portions on one end surface of a case, where each coil-supporting protruding portion is deformed by pressing a coil portion with a pressing jig to the coil-supporting protruding portion, in a state where the other end surface of the case is supported by a supporting jig, the fluid control apparatus includes jig-supporting protruding portions on the other end surface of the case, such that the supporting jig abuts with the jig-supporting protruding portions only. When an area that abuts with the supporting jig is narrow, it is easy to increase accuracy in flatness even in a case of resin molding. Furthermore, when accuracy in flatness of the jig-supporting protruding portions is enhanced, a necessity for adjusting the supporting jig so as to match waviness of the case as in the conventional case is eliminated, whereby the supporting jig can be easily produced.

Abstract: A brake fluid pressure control device controls brake fluid pressures through control of fluid pressure control valves operated in accordance with control signals from, for example, a computer. Signal lines for supplying control signals to control circuits controlling coils of linear valve devices for some wheels (e.g., front-left and rear-right wheels) are connected to a brake ECU by a connector, and signal lines for supplying control signals to the control circuits controlling coils of linear valve devices for other wheels (e.g., front-right and rear-left wheels) are connected to the brake ECU by a different connector. Thus, even if one of the connectors starts operating abnormally, it is possible to supply control signals via the signal lines connected by the other connector and control linear valve devices for some of the wheels (e.g., a pair of diagonally located wheels).

Abstract: A three-state magnet valve for control of fluid flow from a source of fluid pressure. The three-state magnet valve has an application pilot solenoid electrically connectable to a control module, and an application valve for connecting the source of fluid pressure and to a braking device. The three-state magnet valve further has a release pilot solenoid valve electrically connectable to a control module, and a release valve to exhaust the braking device. The valves are interconnected and controlled so that source pressure can never be passed to exhaust.

Abstract: An electrohydraulic brake system where brake pressure is controlled by the combined action of an apply valve and a dump valve by the implementation of a method of controlling the voltage applied to the apply and dump valve. The EHB pressure control system receives a desired wheel pressure command and, with a caliper pressure feedback signal, implements an algorithm to compute one voltage command for the apply valve and another for the dump valve, corresponding to a requested flow from the hydraulics. The voltage command drives current control electronics. The electronics in turn power the solenoids of the proportional apply and dump poppet valves to control flow in or out of the brakes and modulate wheel pressure as required. Use of the algorithm to control the electromagnetic poppet valves achieves the commanded pressure at a vehicle's brakes reliably and with good control in all states of flow through the valve.

Abstract: An engagement portion with a shape recessed in a radial direction of a sleeve is formed on an outer peripheral surface of the sleeve so as to circuit the outer periphery of the sleeve. The engagement portion is also disposed inside an assembly hole of a housing. Caulking of an area surrounding an opening of the assembly hole joins the engagement portion and a deformed portion of the housing. Parts such as sealing members and bushings become unnecessary, because the assembly hole and the sleeve are sealed by contacting surfaces of the deformed portion and the engagement portion. Furthermore, fixing of the sleeve and the housing, as well as the formation of a sealed portion between the assembly hole and the sleeve assures the realization of a one-time caulking process.

Abstract: A valve includes a valve body, a flux tube, and a winding. The body defines first and second passageways, and a circular opening is defined in the second passageway providing fluid communication between the passageways. The flux tube has a closed end, an open end, and a hollow armature receiving section. The open end is in fluid communication with the first passageway. A spherical armature is disposed in the armature receiving section for reciprocating movement between a closed position sealing against the circular opening to prevent communication between the passageways and an open position spaced apart from the opening permitting communication between the passageways. The winding is disposed about the flux tube for electromagnetically positioning the armature. The flux tube forms a fluid tight pressure boundary between the winding and the passageways. A spring urges the armature toward one of the open position and the closed position.

Abstract: A valve seat assembly for a control valve of a vehicle brake system includes a valve seat body. A valve passageway extends through a portion of the valve seat body. A groove is formed circumferentially in an outer surface of the valve seat body. The groove defines a groove surface substantially parallel to an axis of the valve body. A bore extends between the groove surface and the valve passageway to provide fluid communication between the groove surface and the valve passageway. A substantially resilient seal is disposed in the groove of the valve seat body.

Abstract: In an electronic control unit, a chassis is provided with a plate portion, and a circuit board is secured to a board-side attaching surface of the plate portion with a predetermined space secured relative to the plate portion. The chassis is further provided with a side wall protruding from the circumferential portion of the other surface of the plate portion and is mounted on a surface of a housing incorporating a device therein, with an end surface of the side wall being seated on the surface of the housing. A bus bar is fixed at a fixing portion thereof to the board-side attaching surface between the plate portion and the circuit board and is connected to a terminal of the device which is taken out from the housing. The bus bar is provided at plural free ends thereof with branch portions at which lead portions extend to be joined at end portions thereof to the circuit board.

Abstract: Solenoid controlled hydraulic valves in sealed hydraulic circuits are provided with backup actuation without compromise of the hydraulic circuit by provision of an auxiliary, quick fitting solenoid coil case which incorporates manual switches and which may be attached directly to a battery for energization.

Abstract: A brake fluid pressure retaining unit is provided which allows a relief pressure to be variable only by use of a low-cost electromagnetic valve without using an expensive relief valve and orifice. The brake fluid pressure retaining unit includes an electromagnetic valve which is provided midway in a brake fluid channel connecting a master cylinder and a wheel cylinder and is capable of freely opening/closing the brake fluid channel by passing current though a solenoid coil; and an electromagnetic valve control section which detects a release signal indicative of releasing brake operation detected by a brake operation detecting section and passes current through the solenoid coil while referring to current values corresponding to a target maintaining fluid pressure to maintain a predetermined braking force.

Abstract: A modulator comprising an inlet, an exhaust and an outlet, the modulator comprising a piston moveable in response to a control pressure in a control chamber to vary to supply of fluid under pressure to the outlet, wherein the modulator comprises a first end face and a second end face wherein the exhaust and the inlet are provided in the first end face and the outlet is provided in the second end face. The modulator further comprising a hold solenoid connected between the inlet and the control chamber, and a dump solenoid connected between the control chamber and the exhaust, wherein the connections between the hold solenoid, the exhaust and the control chamber and the connections between the dump solenoid, the control chamber and the inlet do not cross the plane of the piston.

Abstract: A brake traction control valve is disclosed. The brake traction control valve includes a valve core, a shell, an armature, an exciting coil, a plunger, and a return spring. The valve core has an inlet to allow inside and outside of the valve core to communicate with each other, and a valve seat provided with an orifice therein. The shell having a dome plus cylinder shape is coupled to the valve core to cover one end of the valve core. The armature is placed in the shell to move forward and backward. The exciting coil is placed around the shell to cause the armature to move forward and backward. The plunger is placed in the valve core to move forward and backward to selectively open and dose the orifice while moving forward and backward by the armature. The return spring returns the plunger and the armature to open the orifice.

Abstract: A normally closed electromagnetic valve is closed again after temporarily being opened during an abnormality check of the valve. When the valve is opened, electricity is supplied so that a plunger is moved by a coil but a back face of the plunger does not abut against a receiving face of a fixed portion. Because the plunger does not strike the fixed portion, no impact noise is generated. Also, when the valve is closed, the electricity is not instantly dropped to zero, but is gradually reduced. As a result, impact noise when the valve strikes the valve seat is able to be reduced.

Abstract: Electropneumatic control valve for a pneumatic brake system of a vehicle, having a divided valve housing consisting of a lower relay valve housing and an upper pilot valve housing which enclose a control chamber in which an axially adjustable control piston is guided. The piston can be acted upon by way of a pilot valve arrangement accommodated in the pilot valve housing in order to switch the compressed-air flow between at least one brake line connection arranged on the relay valve housing, a supply pressure connection and as a bleeder connection by way of an interior valve seat arrangement. A control connection of a back-up valve of the pilot valve arrangement is also arranged on the relay valve housing, and by way of a valve-internal pressure medium duct is connected with the back-up magnetic valve accommodated in the pilot valve housing. Internal pressure medium ducts are arranged and sealed in a manner that allows the pilot valve housing to be produced without machining.

Abstract: A control circuit for a controllable electric solenoid valve of a brake system of a motor vehicle is described, in which the actual values of a controlled variable (f(t)), e.g., the vehicle deceleration, a wheel slip, a driving speed, an angle of rotation or the like are returned to a predetermined tolerance band. The actual value of the controlled variable is measured continuously and compared with the predetermined tolerance band, which is stored in an EEPROM, for example. If the actual value of the controlled variable leaves the predetermined tolerance band (22), a correction device (15) intervenes and returns the actual value to the predetermined tolerance band by increasing or decreasing the trigger current for the solenoid valve (1).

Abstract: The present invention provides a proportional microvalve having a first, second and third layer, and having high aspect ratio geometries. The first layer defines a cavity with inlet and outlet ports. The second layer, doped to have a low resistivity and bonded between the first and third layers, defines a cavity having a flow area to permit fluid flow between the inlet and outlet ports. The second layer further defines an actuatable displaceable member, and one or more thermal actuators for actuating the displaceable member to a position between and including an open and a closed position to permit or occlude fluid flow. The third layer provides one wall of the cavity and provides electrical contacts for electrically heating the thermally expandable actuators. The thermal actuators and the displaceable member have high aspect ratios and are formed by deep reactive ion etching such that they are displaceable in the plane of the second layer while being very stiff out of the plane.

Abstract: An actuating unit (1) for a wheel brake (2) of a motor vehicle has a hydraulic pump (14) that can be driven at variable speeds by an electric motor (13). In addition, a cylinder-piston unit (3) is provided, with a piston (6) and with cylinder chambers (7, 8) disposed on both sides of the piston. By means of the cylinder-piston unit (3), a brake lining (9) can be pressed against and lifted away from a friction element (10) connected to a vehicle wheel. A 4/3-port directional-control valve (15) is provided between the pump (14) and the cylinder-piston unit (3) and is used to modulate the pressure in the cylinder-piston unit. The actuating unit (1) is associated with a control unit (29), which can process an electric brake request signal and can control the electric motor (13) and the valve (15).

Abstract: A control valve includes a magnetic pole member. An armature is slidably supported relative to the magnetic pole member for movement between a fully open position and a closed position. A biasing spring is disposed between the magnetic pole member and the armature for forcing the armature away from the magnetic pole member. A coil is placed about the magnetic pole member and the armature for inducing a magnetic field for moving the armature toward the magnetic pole member. One of either of the magnetic pole member or the armature has a recess for non-contactingly receiving the other when the armature moves between the fully open and closed positions. The control valve can be embodied as a normally open valve or a normally closed valve. The use of dual lateral poles and triple lateral poles create a flat magnetic force versus travel curve thereby allowing for greater proportional control of the valve.

Abstract: An oil pressure control valve for an Anti-Lock Braking System (ABS) includes a modulator block comprising at least an inlet port, a discharge port, and a receiving unit. The control valve also comprises an armature, a coil body, and a housing. The housing includes at least a coupling hole to receive a valve seat, which comprises at least a filter and a seal cup on its outer periphery. When the coil body is energized, a plunger performs a reciprocating motion in which a projection of the plunger moves into contact with and separates from an opening in the valve seat to adjust fluid flow to the discharge port. A region encompassing the discharge port includes at least the aperture and the projection.

Abstract: A control unit having a circuit substrate mounted within a housing that is adapted to be mounted upon a hydraulic valve body with a coil spacer mounted upon said substrate. The coil spacer including at least one coil support ring having resilient member extending in a radial direction from the edge of the ring into the center of the ring. The control unit also including a solenoid coil and flux casing assembly mounted upon the coil spacer ring with the solenoid coil and flux casing assembly flexing the resilient member such that the resilient member urges flux casing away from the coil spacer.

Abstract: An electromagnetically actuatable valve for hydraulic control devices in motor vehicles is embodied as a pressure-equalized seat valve in a mode of construction comprising a hydraulic part with a valve dome and an electrical part that can be slipped onto the valve dome. In a magnet valve that is normally open, the tubular tappet that supports the closing member is supported at one point in a first bearing point, in terms of the longitudinal direction, that is embodied as a slide bearing, and a bearing ring that forms the sealing point accomplishes the hydraulic pressure equilibrium with the effective sealing diameter of the closing member that together with the valve seat forms the second bearing point. With the valve, very short switching times, in particular less than 0.5 ms, can be achieved with an economical mode of construction.

Abstract: A method is provided for measuring a pressure of a hydraulic fluid that is supplied from a hydraulic fluid control device (1) to a operation device (6). The method includes measurement of a first pressure (Pm) and a second pressure (Pa). The first pressure is the pressure of the hydraulic fluid within a first flow path (P3 to P8) connecting a pressure control unit (3) and the operation device. The second pressure is the pressure of the hydraulic fluid within a second flow path (P11, P12) connecting an accumulator (22) and the pressure control unit. Then, a stabilization time (T) is determined. The stabilization time is the time when a pressure gradient per unit time of the second pressure become to be smaller than a predetermined value. Thereafter, a pressure (Pw) of the hydraulic fluid at the operation device is determined based on the first pressure that is measured at the stabilization time or at a time immediately after the stabilization time.

Abstract: The invention relates to an electrohydraulic brake slip control device for motor vehicles, including one or more electromagnetically actuatable hydraulic valves contained in a valve block, having valve domes, which protrude at least partway beyond the valve block in the direction of a valve axis and each engage in a coil opening of an electric coil held by a coil holder, and having contact elements, which protrude away from the coils and through openings of a top plate, in order to electrically activate the coils. At least some of the coils are held against the coil holder in a plane perpendicular to the valve axes with an easily moving play, but also in a position-oriented fashion and, after their alignment produced by the engagement of the valve domes in the associated coil openings, can be rigidly fixed in the aligned position.

Abstract: A hydraulic control valve for an Anti-lock Braking System (ABS) includes a modulator block having at least a housing, an inlet port, a receiving unit, and an outlet port. The housing is coupled to at least a plunger, an armature, and a coil body. The housing also has a coupling hole to receive a valve seat. Upon application of a current, a coil generates a magnetic field causing a plunger coupled with the armature to perform a reciprocating motion in which a projection of the plunger moves in contact with and separates from an aperture in the valve seat to adjust fluid flow. The hydraulic control valve also comprises fluid flow paths, provided in a space between the valve seat and the housing, which communicate with an outlet port. The hydraulic control valve accommodates at least a filter and a seal cup on the outer periphery of the valve seat.