Abstract: An apparatus for controlling the brake pressure in a vehicle brake system equipped with an electronically adjustable brake booster (10), comprising an actuator (22) which transmits the actuating movement of the brake pedal to a master brake cylinder and has assigned a path limiting element (80) which limits the axial actuating movement of the actuator (22) in that it is received between abutments (90, 92), the apparatus being characterized in that a switch is actuated by the path limiting element (80) together with one of the abutments (90), said switch supplying a signal to the brake booster when the path limiting element (80) abuts the one abutment (90).

Abstract: A spring assembly for an automatic transmission of automobiles includes a generally ring-shaped spring retainer formed from a synthetic resin material, a plurality of mounting protrusions circumferentially formed on a peripheral face of the spring retainer, and a plurality of coil springs having one ends mounted on the mounting protrusions respectively. Alternatively, the spring assembly includes a pair of generally ring-shaped spring retainers each formed from a synthetic resin material, a plurality of mounting protrusions circumferentially formed on each spring retainer, a plurality of guide protrusions circumferentially formed on each spring retainer so as to be positioned between each mounting protrusion and the adjacent one, and a plurality of coil springs having one ends mounted on the mounting protrusions of either spring retainer and the other ends fitted to the guide protrusions of the other spring retainer respectively.

Abstract: The invention relates to a hydraulic power unit for a vehicle braking system comprising an electronic controller (22, 24) arranged in a housing (12), a valve block (14) for accommodating electromagnetic valves for the control of hydraulic fluid in the braking system, and a pump motor (16) for a pump delivering a hydraulic fluid, with the housing (12) of the controller (22, 24) being connected with the valve block (14) and the pump motor (16) and is characterized in that a wall (12a) of the housing (12) at its outer surface (12a') facing the valve block (14) carries at least one solenoid (20) for the electromagnetic valves in the valve block (14).

Abstract: Brake disc assemblies and methods for making the same which allow for increased carbon utilization. In one embodiment of the invention, worn or spent discs from a carbon brake disc assembly are used to fabricate new brake discs. The separate discs, individually unsuited for further use in a brake assembly, are secured together with like wear material and subjected to chemical vapor infiltration to configure a disc suitable for use as a new disc. In other embodiments, previously used discs or new carbon material is employed to configure wear pads or wear discs which are affixed to opposite sides of a carrier plate and then subsequently used in a brake disc assembly. In all of the embodiments, carbon screws or threaded rods are employed to hold the components of the disc together. Such carbon screws or threaded rods are fabricated from otherwise worn or spent carbon discs or from new carbon.

Abstract: A total longitudinal force which is a sum total of the longitudinal forces applied to the plurality of wheels is detected or determined, and the longitudinal forces applied to the wheels are controlled on the basis of a front wheel-side target wheel longitudinal force and a rear wheel-side target wheel longitudinal force determined by distribution of the total longitudinal force at predetermined distribution proportions. When the slipping of a wheel is detected, the distribution proportions are changed, so that the target wheel longitudinal force is larger on one of the front and rear wheel sides in which more wheels are in non-slipping states.

Abstract: A vibration isolator grommet comprises a sleeve and an annular elastomeric element. The sleeve has a cylindrical portion with a radially outwardly extending flange at one end thereof. The elastomeric element has a flange underlying the flange on the sleeve, a cylindrical portion telescoped over the cylindrical portion of the sleeve, and a radially inwardly extending portion initially underlying the cylindrical portion of the sleeve but movable radially outwardly upon axial advancement of the sleeve relative to the elastomeric element to lock the grommet in a workpiece.

Abstract: An interface (3) for vibration reduction in structural-dynamic systems comprises a base-side construction element (8) and a structure-side construction element (9) and at least one actuator (14), for example a piezoelectric or a magnetostrictive actuator. The actuator (14) has a main direction (17), and the extension of the actuator (14) in its main direction (17) between a first engagement point (15) on the base-side construction element (8) and a second engagement point (16) on the structure-side construction element (9) can be voluntarily changed by means of a drive signal.

Abstract: An orifice and a one-way valve for permitting a flow of a liquid only in one direction from a primary master cylinder to an input port in a secondary master cylinder of a brake system are incorporated in parallel in an hydraulic pressure introduction passageway which connects the input port in the secondary master cylinder and an output port in the primary master cylinder. Thus, it is possible to moderate a kick-back phenomenon due to a back-flow of a pressure oil from a hydraulic pressure chamber in the secondary master cylinder via the input port toward the primary master cylinder, and to rapidly fill a brake oil in the secondary master cylinder from the side of the primary master cylinder.

Abstract: A valve arrangement, particularly for a fluid brake circuit with anti-slip control, comprising a first, a second and a third fluid connection (16, 20, 46) of respective, predetermined flow cross-sections, at least one valve element (44) which is biased by a first spring arrangement (106) in a first position in which the first and second fluid connection (16, 20) are communicating via a flow path and the third fluid connection (46) is closed, and a valve actuating means (42) by which the valve element (44) can be moved in order to assume a second position in which the first and third fluid connection (16, 46) are communicating via a flow path and the second fluid connection (20) is closed, with the bias of the first spring arrangement (106), the force that can be applied to the valve element (44) by the valve actuating means (42), and the flow cross-sections of the fluid connections (16, 20, 46) being so dimensioned that with a predetermined fluid pressure at the second fluid connection (20), the valve element

Abstract: A combined automatic pneumatic and electro-pneumatic brake system for a railroad freight car in which a conventional type ABD control valve device is modified to incorporate a solenoid valve portion at a mounting face from which the manual release valve portion has been removed and where existing passages in the control valve may be accessed in order to utilize the existing car control valve device with only a minimum of modification.

Abstract: A controller for controlling supply of electrical current to the coils or coil groups of an electromagnetic retarder for applying drag torque to a turning shaft or drive line. The controller includes an input signal receiving element for receiving input signals from at least one input device, a control unit responsive to the input signal for modulating electrical current supply from at least one current source to the retarder coils so that current is distributed to each of the coils or coil groups substantially equally.

Abstract: An antilock brake control device installed across two independent brake circuits in which brake lines connect the master cylinder to the wheel cylinders of wheel brakes of diagonal front and rear wheels, in which for each brake circuit, a first brake line 21 connects the master cylinder to the wheel cylinders 141, 144 of the front wheels, first selector valve 24 is installed in each the first brake line 21, second brake line 22 connects the wheel cylinders 142, 143 of the rear wheels and the first brake line 21, second selector valve 25 is installed in the second brake line, reflux channel 23 connects the first brake line and the second brake line, and a hydraulic pump 26 is installed in the reflux line.

Abstract: An antilock/traction control/vehicle stability braking system hydraulic circuit using a fluid flow intensifier to provide a rapid application of fluid pressure to brakes during a TC/vehicle stability control operation at a flow rate that is greater than is normally available from an ABS pump alone. The intensifier increases the fluid flow as a function of using a stepped piston operating within respective input and output chambers having different effective diameters. The intensifier also includes an intermediate chamber into which fluid dumped from a brake cylinder is drawn rather than being lost to a master cylinder reservoir. The fluid thus remains in the hydraulic circuit, ensuring that a desired ratio of pedal travel versus pressure is maintained after a transition from TC/vehicle stability braking to ABS-base braking.

Abstract: The vibration isolation device of this invention is to be interposed between a vibrating body and a vibrated body, characterized in that at least one of the vibrating body and the vibrated body is fastened to the surface of a vibration isolating device which is abutted against it through a piezoelectric insert interposed constant ?K! which is represented by a particular formula or a fastener which is capable of piezoelectric displacement.

Abstract: A spin suppress control device of a vehicle estimates a spin quantity of the vehicle to represent a liability of its spinning, and selectively and variably brakes each of the wheels according to the spin quantity so as to decelerate the vehicle within a range of generating no substantial yaw moment in the vehicle when the spin quantity exceeds a first threshold value therefor, and provides the vehicle with an anti-spin moment when the spin quantity exceeds a second threshold value therefor greater than the first threshold value.

Abstract: A shock absorber utilizes a single flexing disc assembly includes a flexing disc which is capable of performing the flexing disc function normally required for allowing the passage of fluid between the two sides of a shock absorber while also providing the blow off function. The flexing disc is backed by a ridge formed on a spring seat. The ridge defines a ring that is concentric with the central long axis of the piston rod. Under normal rebounding conditions, the pressure of rebounding damping fluid builds to the point that the flexing disc is opened somewhat by flexing to allow normal bleedthrough. However, in the event that the rebound pressure builds to a higher, predetermined value, the valve flexes to an extreme degree against the ridge formed on the spring seat. In this manner, the ring acts as a fulcrum, and a quantity of damping fluid is allowed to pass thereby until normal rebound pressure values are reached.

Abstract: A control apparatus in a brake system of a motor vehicle having a wheel brake cylinder for braking a vehicle drive wheel, the apparatus including a pump for pressurizing a fluid received from a low-pressure source, a valve device having a pressure increase state for permitting the fluid pressurized by the pump to be fed into the wheel brake cylinder, and a pressure decrease state for permitting the fluid to be discharged from the wheel brake cylinder into the low-pressure source, a traction control device for selectively placing the valve device in at least the pressure increase and decrease states, to control the pressure of the fluid in the wheel brake cylinder for thereby controlling the drive force of the drive wheel so as to control the amount of slip of the drive wheel, and a pump delivery saving device for reducing the delivery pressure of the pump in at least a portion of a time period during which the valve device is placed in a state other than the pressure increase state.

Abstract: A shock absorber comprises a cylinder defining a cavity between a pair of end walls. A piston rod extends axially through one of the end walls, and a piston is mounted on the piston rod between the end walls so as to divide the cavity into first and second working chambers containing a damping fluid. A first array of passages extends through the piston and communicates between the first and second chambers, and a sprung valve assembly is provided for obturating the first array of passages in the event of the velocity of the piston rod relative to the cylinder exceeding a predetermined value. A second array of passages communicates between the working chambers and provides a fluid flow path when the first array of passages is blocked by the sprung valve assembly. Restricted exhaust orifices communicate with the second array of passages for limiting the flow of fluid through the second array of passages so as to control the movement of the piston rod.

Abstract: A spring unit for installation in a pivot pin assembly. The spring unit including a pair of disc springs each with an axially centered aperture and each with, when in an uncompressed condition, a concave side and a convex side. A retaining element, such as an adhesive, retains the disc springs to a returning member such that the spring unit can be easily installed in the pin assembly as a unit. The spring unit further includes a centering structure whereby the disc springs can be centered about the pin assembly when fully compressed.

Abstract: Hinge eye, in particular for a vibration damper, comprising a plastic body with a transverse opening for a fastening means, and a connection opening for the unit to be retained, characterized by the fact that the connection opening has a metal reinforcement sleeve to reinforce the connection.