Abstract: The invention relates to a pneumatic brake-booster comprising, in series, a control rod (10) substantially fixed to a plunger (12) by a pivot mechanism (14), a reaction disk (16) and a push rod (18), the control rod (10) actuating a three-way valve with two seats (24, 26), s specific space being provided at rest between the reaction disk (16) and the plunger (12). According to the invention, one of the two seats of the valve consists of the end of a sleeve (30) coaxial with the plunger (12), a prestressed compressible mechanism (32) tending to shift the sleeve (30) and plunger (12) axially away from one another, the sleeve (30) coming axially up against one end of a piece (36) fixed to the control rod (10) after the relative positions have been set.

Abstract: A hydraulic pump comprises at least one alternating-cycle piston (20) having a suction phase and a delivery phase, and sliding in a fixed cylinder (22). The pump possesses in addition a nonreturn suction valve (32) placed between a source of fluid under low pressure (28) and a working chamber (30) defined in the cylinder, and a nonreturn delivery valve (34) placed between the working chamber (30) and an output chamber (16) for the fluid under high pressure, connected to an application circuit 10, 12). The output chamber (16) possesses a wall (40) which is movable as a function of the pressure which prevails in the output chamber (16), the movable wall (40) being capable of controlling the locking of the delivery valve (34) in an open position substantially during the greater part of the suction phase when the pressure in the output chamber (16) is greater than a given pressure, in such a way that the suction valve (32) stays closed in a corresponding manner.

Abstract: A hydraulic braking circuit comprises at least one brake fluid source (26, 36), a master cylinder (10), the outlets of which are connected to at least one sub-circuit comprising at least one brake motor (14, 16), and which is controlled by way of a pedal (12), and an electronic control unit (22). It also comprises a pressure generator (24), and an electrovalve (28, 30) which is arranged in each sub-circuit, so as to establish a connection, when at rest, between the outlets of the master cylinder (10) and the associated brake motors (14, 16) and, in the excited position, between the outlets of the generator (24) and the associated brake motors (14, 16), the control unit (22) being capable of simultaneously controlling the functioning of the pressure generator (24) and the excitation of the electrovalve (28, 30).

Abstract: An exhaust driven turbocharger includes a wastegate valve which is operated by a pneumatic actuator mounted on the outer edge of the compressor housing. A portion of the linkage interconnecting the actuator with the wastegate valve includes a flexible cable which is routed around the edge of the turbine housing, around the center housing and over the outer edge of the turbine housing to a lever which operates the wastegate. In alternate embodiment, the axis of the actuator extends substantially parallel to the axis of the turbocharger, and the flexible cable is looped around the end of the turbocharger and extends across the center housing to engage the lever actuating the wastegate valve.

Abstract: The disc brake (10, 210) comprises a support member (12, 212) having circumferentially spaced apart pin support portions (16, 18; 216, 218) with pin openings (20, 24). A cordal type carrier having inboard (32, 232), outboard (34, 234), and circumferentially spaced apart sides (36, 236; 38, 238) is mounted slidably by pins (22, 28; 222, 228) on the support member (12, 212). The pins extend slidably through the pin openings (20, 24) and are each fixed to the carrier (30, 230). One (22, 222) of the pins (22, 28; 222, 228) has a larger diameter than the other (28, 228) of the pins (22, 28; 222, 228), and the smaller diameter pin (28) has disposed thereabout an axially extending and slidable sleeve member (26).

Abstract: The invention concerns a vacuum-type booster comprising a case divided internally into a vacuum chamber and a working chamber by a piston comprising a valve mechanism possessing a double valve (20) enabling, in the rest postion, a communication between the two chambers which are then isolated from the environment and, in the working position, an isolation of the vacuum chamber and a communication between the working chamber and the environment at atmospheric pressure, this valve mechanism being normally controlled by an actuating rod (12) extending out of the case. According to the invention, it comprises, in addition, an electromechanical device (50, 52, 54) for controlling the valve mechanism independent of the actuating rod (12).

Abstract: The vehicle brake with brake cylinder bore insert (30, 130) comprises a cast disc brake cylinder (12, 112) which includes a bore (14, 114) into which the bore insert (30, 130) may be disposed. The bore (14, 114) may have an opening (22, 118) at either one (20, 120) of the opposite axial ends for inserting the bore insert (30, 130). The insert has lock ribs (34) disposed about the perimeter (32) thereof, and at opposite axial ends a pair of perimeter extensions or crush ribs (36) which tightly engage the surface (21, 121) of the bore (14, 114) when the insert (30, 130) is disposed within the bore (14, 114). The insert (30, 130) has opposite flat sides (50) which permit an adhesive material to be disposed between the lock ribs (34) and the surface (21, 121) of the bore (14) in order to fix the insert (30) within the bore (14). The insert (30, 130) contains a central opening (39, 139) which may be of different diameters or shapes for receiving a piston (40) and seals disposed about the piston (40).

Abstract: The pressure supply valve (40) provides hydraulic pressure from a pressure source (20) to the system modulators (46, 46', 48, 48', 52, 52') and isolates a hydraulic boost chamber (34) of a boosted master cylinder (12). The pressure supply valve (40) includes an armature (83) operated piston valve (72) having a through opening (79), a valve seat (85) of the piston valve (72) engageable with a ball valve (68). The ball valve (68) normally prevents fluid flow from the pressure source (20) to the modulators (46, 46', 48, 48', 52, 52'), and the piston valve (72) permits fluid flow through itself during normal and adaptive braking. During traction control operation, the piston valve (72) displaces the ball valve (68) and permits the pressure source (20) to communicate with the modulators (46, 46', 48, 48', 52, 52').

Abstract: An engine-exhaust gas driven turbo compressor has a controllable diaphragm valve (13, 15) in a flow path (20, 24) between a compressor delivery port (6) and an atmospheric inlet port (4), this valve being controllable to regulate gas flow via the compressor wheel member (2) to avoid compressor surging when the demand is low and a compressed torroidal wire mesh element (23) is accomodated in an annular region (22) of the compressor housing between the valve (13, 15) and the inlet port to suppress noise resultant upon operation of the valve.

Abstract: A brake assembly with hydraulic boosting, comprises at least one disk brake having a fixed part (1), a caliper (3), a brake motor (82) actuated by a fluid under pressure, a master cylinder (48) and a device (15) for recovering the energy dissipated during braking. The device (15) comprises at least one energy-recovering cylinder (21) with its piston (19) which is associated with the fixed part (1) and with the caliper (3) and the working chamber of which is connected fluidly to the brake motor (82). A hydraulic booster/limiter is connected between the energy-recovering cylinder (15) and the brake motor (82), the hydraulic booster/limiter being controlled by the pressure of the fluid generated in the master cylinder (48).

Abstract: A hydraulic pump comprises at least one reciprocating piston (2) sliding in a stationary cylinder (4), a non-return suction valve (12) arranged between a source of fluid under low pressure and a working chamber (10) defined in the cylinder (4), and a first non-return delivery valve (16) arranged between the working chamber (10) and an outlet chamber (14) for the fluid under high pressure. A conduit (24) connects the outlet chamber (14) and the working chamber (10), the piston (2) leaving this conduit (24) open at the end of the suction period and at the start of the delivery period and closing it during the rest of the cycle.

Abstract: The present invention relates to a pneumatic brake booster assembly for a vehicle comprising a brake booster (10) formed from two shells (18; 37), a master-cylinder (14) mounted on the booster (10), a brake pedal (20) operatively linked to the booster (10) and mounted on a support bracket (22). According to the invention, one of the shells (18; 37) of the brake booster (10) is formed by a plate (26) upon which is mounted the support bracket (22), the plate (26) being destined to form a part of a firewall (12) of the vehicle.

Abstract: The brake system comprises two hydraulic sub-circuits, each connecting a driving wheel and a free wheel to a working chamber of a master cylinder (1) connected to a general reservoir (20) of fluid under low pressure, and including a wheel anti-lock braking device comprising a three-way solenoid valve (51, 52, 53, 54) normally opening communication between an inlet of fluid under pressure and the brake motor, while, in the expansion phase of the anti-lock device, it closes this communication and connects the brake motor to a reservoir (21, 22) of fluid under low pressure to each sub-circuit. The device comprises a differential valve slide consisting of a valve of which one face receives the pressure prevailing in the associated brake motor (31, 32, 33, 34) and the other that as generated by a pump (45, 46) and, at rest, putting in communication the working chamber of the master cylinder (1) and the inlet of fluid under pressure.

Abstract: The wear indicator of the friction lining (10) of a brake consists essentially of a loop of conductive wire arranged in a sleeve (18) closed by way of an insulating bush (20) of cylindrical form and having a longitudinal axis (16). The loop is in contact at least once with substantially all the generatrices of the inner wall of the bush (20). Preferrably, the loop consists of a substantially straight first part (24) arranged parallel to the longitudinal axis (16) and a second part (26) wound helically round the first part (24) and connected to the latter.

Abstract: In the booster are mounted movably a hollow booster piston (20) and a control rod (30) carrying a plunger (28) seated in the piston (20), the rear end of the plunger (28) forming a first annular valve seat (28a) concentric with a second annular valve seat (20a) carried by the booster piston (20), the first valve seat (28a) and second valve seat (20a) interacting with an annular shutter (34) carried by the booster piston (20), and a reaction disk (48) being interposed between an annular front face (20b) of the booster piston (20) and a rear face of a push rod (46). The process for adjusting the value of the pump of the booster comprises the following steps:applying to the push rod (46) a force equal to the boost force corresponding to the desired jump of the booster,moving the seat (20a) of the booster piston (20) away from the shutter (34),putting the front face of the plunger (28) and the rear face of the reaction disk (48) into contact and maintaining this contact during the next step.

Abstract: The torsion/compression strut spring (60) is disposed about a forked end (54) of a parking brake strut (50) in a drum brake (10). The forked end (54) is received loosely about the web (12A) of an associated drum brake shoe (12) and a parking brake lever (40). The web includes a generally U-shaped recess portion (12B) which is sized to seat fixedly one oval-shaped end portion (64) of the spring. The spring (60) has oppositely disposed oval-shaped end portions (62, 64) which, in a disassembled and at-rest position, have longitudinal centerlines located 90.degree. apart relative to one another. When the spring (60) is assembled on the parking brake strut (50), the one end portion (64) seats fixedly within the recess portion (12B) and the other end (62) engages the strut (50) so that the spring (60) exerts a torsional force upon the strut (50) and causes legs (53, 56) of both forked ends (52, 54 ) of the strut (50) to engage respective sides of the parking brake lever (40) and drum brake shoe web (12A).

Abstract: The hydraulic pump comprises at least one reciprocating piston (2) sliding in a stationary cylinder (4). The piston (2) comprises, on the same side as the working chamber (10), a cylindrical skirt (22) which has the inside diameter of the cylinder (4) and in which is made at least one first port (18) putting the working chamber (10) in communication with the outer wall of the skirt (22). A second port (24) puts the duct (6) upstream of the valve (12) in communication with the outer wall of the piston (2). Finally, a slot (20) of a length at least equal to the distance separating the ports (18, 24) is made in the cylinder (4) so as to cause these ports (18, 24) to communicate over a specific zone of the reciprocating movement of the piston when the piston is sensibly at mid-stroke.

Abstract: A fuel filter for a motor vehicle includes a housing made of a base Nylon 12 material to which are added stainless steel fibers to render the housing electrically conductive while retaining moldability. The electrically conductive housing permits charges generated by the fuel passing through the filtering media to be dissipated to the vehicle body, thereby preventing erosion of the housing and subsequent leaks.

Abstract: A fuel system component for a motor vehicle constructed from a polymer material to which are added stainless steel fibers to render the component electrically conductive while retaining moldability. The electrically conductive component permits charges generated by the fuel passing through the component to be dissipated to the vehicle body, thereby preventing arcing which causes erosion of the component and subsequent leaks.

Abstract: The combination solenoid valve and integral shuttle shuttle valve (10) comprises a solenoid valve (40) having windings (41) which actuate a rod (43) that engages a ball valve (44). An end (61) of the solenoid valve (63) includes an end filter mount (80) having a filter (77) and engaged by a shuttle valve (50). Located sealingly and slidably within the end (61) of the solenoid valve (41) is the shuttle valve (50) which is biased away from the ball valve (44) by a spring (58). The shuttle valve (50) has at least one through opening (55, 55A) which is aligned with a movable orificed washer (90) located about an extension (54) of the shuttle valve (50).