Abstract: A method and a device for regulating the pressure prevailing in at least one wheel brake. Pressure is regulated in a stepless, continuously variable manner, by a regulator generating at least one driving signal quantity for a pressure-influencing valve arrangement on the basis of the active operating point of the valve arrangement.

Abstract: A vibration isolator which uses a compressible fluid such as air within a pair of flexible chambers interconnected by a restrictive passage, with one of the chambers connected between a first member which may vibrate and a second member which is to be isolated from vibration so that with vibration of the first member, the compressible fluid is compressed and expanded to force compressible fluid to flow through the restrictive passage between the first and second flexible chambers, and provide desired damping of vibration to the second member.

Abstract: A slaved dump valve for an anti-lock brake system having two driven rear wheels and traction control includes a check valve and restrictor. In particular the dump valve includes a 2-way/2-position solenoid valve connected to the return conduit of each rear wheel brake cylinder for reducing the pressure at both of the wheel brake cylinders simultaneously. Each return conduit of each rear wheel brake cylinder connected to the slave dump valve contains a check valve oriented to prevent pressurized fluid from flowing from one rear wheel brake cylinder to the other. A restrictor is positioned in each return conduit to allow the pressure at each of the rear wheel brake cylinders to be reduced immediately when the dump valve is opened. Fully independent pressure regulation of the rear wheel brake cylinders connected to the single dump valve can be simulated by controlling inlet valves in conjunction with the single dump valve.

Abstract: A damping force control type hydraulic shock absorber is provided having a broad damping force control range and is capable of obtaining appropriate damping force over the entire piston speed range from a low speed region to a high speed region. A piston is fitted in a cylinder, and a reservoir is connected to the cylinder. A cylinder upper chamber and the reservoir are communicated through a main passage in which a main damping valve is provided. The cylinder upper and lower chambers are communicated through an extension sub-passage in which an extension sub-damping valve and an extension variable orifice are provided. The cylinder lower chamber and the reservoir are communicated through a compression sub-passage in which a compression sub-damping valve and a compression variable orifice are provided.

Abstract: The present invention is directed to a braking control system for controlling a braking force applied to each of front and rear wheels of a four-wheel drive vehicle, which has a front differential gear connected to the front wheels, a rear differential gear connected to the rear wheels, and a center differential gear connected to the front and rear differential gears. A wheel speed sensor is provided for detecting wheel speeds of the wheels. A non-contact detector is provided for determining whether at least one wheel is not contacting the ground in the vehicle's path, on the basis of the wheel speeds detected by the wheel sensor. A downhill detector is provided for determining whether the vehicle's path is on a downhill road. An engine brake detector is provided for determining whether the vehicle is under an engine brake.

Abstract: A disc brake apparatus for use in a hydraulic brake system including a master cylinder for generating a hydraulic signal which is communicated through a hydraulic line and proportional to an actuation force applied to inner and outer brake pads for resisting rotation of a brake rotor of the type found on motor vehicles. The disc brake apparatus includes an outboard cylinder member (92) having a bore (94) and a first shoulder (100) therein. An outboard piston (98) is slidably housed within the bore of the outboard cylinder member. The outboard piston (98) includes a first end (126) adapted to force the outer pad (48) toward the brake rotor in response to the hydraulic signal applied to a second end (128) of the outboard piston (98). The outboard piston (98) also includes a second shoulder (132) for engagement with the first shoulder (100) to retain the outboard piston (98) in an applied position.

Abstract: The present invention relates to a method of operating a hydraulic brake system for automotive vehicles, which includes an anti-lock system (ABS), a brake force booster which is electrically actuatable independently of the driver's wish, and a pressure or deceleration controller which is used to actuate the brake force booster.In order to enhance the quality of ABS control in particular, according to the present invention, a signal (ABSM) indicative of the ABS mode is sent to the pressure or deceleration controller (12) and, upon commencement of ABS control, the instantaneous pressure or deceleration actual value (Pi.sub.ist1, P.sub.ist11, P.sub.ist12) is stored and the brake force booster (2) is actuated so that the pressure or deceleration actual value (P.sub.ist) is maintained constant.

Abstract: A copper series sintered friction material is provided including a foundation constituted by copper alloy powder and containing hard phases and solid lubricant components dispersed uniformly, and exhibits a friction coefficient of 0.3 or more stably without seizure when the sintered friction material frictionally slides against titanium or a titanium alloy in the atmosphere, the foundation containing at least one additive element selected from Zn, Ni, Al, Fe, and Mo.

Abstract: A hydraulic mount includes a mounting plate and a wall, with a working chamber defined between the mounting plate and the wall. The mounting plate and the wall are separated by a relatively thick elastomeric element so that the size of the working chamber varies as the elastomeric element is compressed and expanded by operation of the mounting plate and the wall moving closer together and farther apart. A reservoir is defined substantially by the elastomeric element in combination with a relatively flexible diaphragm that extends between the mounting plate and the wall so that the reservoir is generally annular in shape and is positioned around the working chamber. The elastomeric element serves as a separation wall between the working chamber and the reservoir.

Abstract: A damper mechanism for attenuating vibrations having a vibration attenuating spring element (1) which includes: a leaf spring (2) having a bent portion (4) and a pair of lever portions (5) extending from both ends of the bent portion (4); and an elastic member (3) disposed between the lever portions (5). When the leaf spring (2) is subjected to compressive forces, the lever portions (5) and the elastic member (3) are elastically deformed. Internal friction is generated in the elastic member (5). The functions typically provided by a conventional elastic member and a conventional resistance generating mechanism are realized by utilizing a simple spring element composed of the leaf spring (2) and the elastic member (3).

Abstract: A system and method for providing braking to a vehicle having at least two brake sets intended to deliver braking forces for a decelerating rate in response to a braking force request wherein each brake set has surplus braking available. In the event one brake set fails or becomes unavailable, then the surplus available in the other braking set may be utilized to satisfy this deficit, thereby providing the requested braking rate to the vehicle.

Abstract: A vibration damper including: a mounting member secured to a subject body; a first mass member which is displaceable relative to the mounting member in a direction of an input vibration of the subject body; a first elastic member elastically connecting the first mass member to the mounting member; a second mass member which is displaceable relative to the mounting member and the first mass member in the direction of the input vibration of the subject body; a second elastic member elastically connecting the second mass member to the first mass member; a member for generating an oscillating force as a force of relative displacement between the first mass member and the second mass member in the direction of the input vibration of the subject body; and a fluid chamber filled with a non-compressible fluid, the fluid chamber being partially defined by the first elastic body and the second elastic body and disposed between the mounting member and the second mass member.

Abstract: A vibration reduction system including a base, a disturbance generating device, and at least one active mount connecting the base and disturbance generating device for imparting a force at a point on the base to minimize the transmission of the disturbance to the base. The active mount includes a passive element on which the disturbance generating device is supported, an actuator for imparting a force on at least the base, a sensor located on the base for sensing the total force imparted by the active mount at the selected point and generating a corresponding signal, and a controller for generating an input signal corresponding to the force to be imparted by the actuator on at least the base and sending the input signal to the actuator. The controller regulates an impedance error as a function of the signal received from the sensor to generate the input signal.

Abstract: A vibration damper includes at least one damper mass and at least one bush bearing, the bush bearing having an inner supporting core surrounded with radial clearance by an outer supporting sleeve, a spring mass made of elastomer material that extends essentially radially and joins the supporting core and the supporting casing being arranged in the gap formed by the clearance. The damper mass has an essentially pot-shaped recess, in which the bush bearing is arranged, the supporting casing being pressed in an essentially airtight manner into the recess, and the hollow space delimited by the damper mass and the bush bearing being designed as a pneumatic spring.

Abstract: An engine mount assembly comprises a rigid dome-shaped cover secured to the vehicle body or chassis. The cover supports internal rubber elements which in turn support rigid facing jaws. A damping module comprising two bellows chambers and an assembly of two valve elements is inserted in a unit, together with a valve arrangement. A bolt secured to the engine of the vehicle passes through the valve elements and holds the damping module in position and transmits engine vibrations to the damping module. Hydraulic fluid in the chambers is thus forced through a helical conduit which contains a restriction for damping the fluid movement and thus the vibrations. At higher vibration frequencies, valve flaps vibrate causing alternate small compression and expansion of the chambers and thus damping of the vibrations.

Abstract: A braking system comprising an anti-lock vehicle braking system for a vehicle having a pair of drive wheels (13, 14), the wheels of said pair being disposed on opposite sides of the vehicle, comprising a wheel speed sensor (17, 18) for each wheel (13, 14), a controller (19) responsive to wheel speed signals from said two wheel speed sensors (17, 18) for sensing skid conditions at said wheels (13, 14) and for generating skid control instructions, a wheel brake (23, 24) for each wheel (13, 14), responsive to fluid pressure, hereinafter referred to as brake pressure, supplied thereto, a common supply line (37), for supplying a common brake pressure for both of said brakes from a fluid pressure supply valve means (38) in accordance with a brake demand signal and a skid control means (40) controlled by said skid control instructions for modulating the common brake pressure, having a brake apply valve (51) to supply fluid under pressure to the common supply valve (39), in response to the controller detecting a whee

Abstract: The braking system includes a housing, and a friction brake disposed in the housing and operationally connected to a member-to-be-braked. A biasing piston, for engaging the friction brake, is disposed in the housing, and a control piston is also disposed in the housing. The control piston and the housing define a pressure chamber for receiving a pressure medium which biases the control piston away from the friction brake. A first resilient member is disposed between the control piston and the housing to bias the control piston towards the friction brake. A second resilient member is disposed between the control piston and the biasing piston for transferring force applied to the control piston by the first resilient member to the biasing piston so as to bias the biasing piston towards the friction brake. The fiction brake includes brake lamellae operationally and longitudinally displaceably connected to the housing.

Abstract: In a computer controlled train brake system, a controller provides a penalty brake handle signal using a penalty input and the brake handle signal, and controls the train brakes using the brake handle signal and the penalty brake handle signal. The penalty input determines whether the brake handle signal or the penalty brake handle signal is used to control train braking. The brake handle signal is used if the brake handle signal is at least a predetermined value during a penalty. The generation of a brake handle signal is delayed and is not generated if corrective action is taken before the expiration of the delay.

Abstract: A slide pin bushing for use in a vehicle disc brake caliper assembly adapted to selectively frictionally engage a rotor connected to a vehicle wheel includes an anchor plate adapted to be secured to a stationary component of the vehicle, and a caliper secured to the anchor plate for sliding movement relative thereto. A pair of brake pads are carried by the disc brake caliper assembly, and an actuation system is provided for selectively moving the brake pads axially toward and away from one another so as to selectively frictionally engage the rotor. An elastomeric slide pin bushing is disposed in a non-threaded opening formed in the caliper. The slide pin bushing includes a pair of opposed ends and an intermediate body section. The intermediate body section of the slide pin bushing is provided with a cylindrical inner surface having a generally roughened textured surface finish. A generally rigid sleeve is disposed within the slide pin bushing.

Abstract: A fluid-filled cylindrical vibration damping device comprising: an inner sleeve; an outer sleeve disposed radially outwardly of the inner sleeve; an elastic body interposed between the inner and outer sleeves; a pressure-receiving chamber partially defined by the elastic body; a first flexible diaphragm partially defines a first equilibrium chamber; a second flexible diaphragm partially defines a second equilibrium chamber; a first orifice passage which permits fluid communication between the pressure-receiving and first equilibrium chambers; for defining a second orifice passage which permits fluid communication between the first and second equilibrium chambers; the second orifice passage having a ratio A/L which is smaller than that of the first orifice passage, wherein A and L are a cross sectional area and a length of each orifice passage, respectively, and wherein the fluid flowing in the first orifice passage has a first resonance frequency f1 while the fluid flowing in the second orifice passage has a