摘要:
In one aspect, a brake pump assembly including a plurality of pairs of pumping elements configured in a horizontally opposed arrangement, and a rotatable eccentric assembly located between the pumping elements. The pairs of pumping elements abut the eccentric assembly and are reciprocally driven to provide an output of pressurized fluid. In another aspect, a brake pump assembly including a hydraulic block defining a piston bore, and a pumping element received in that bore. The pumping element includes a polymer piston, and a circumference of the polymer piston defines a high-pressure seal slideably engaging adjacent structure. In another aspect, a hydraulic block coupled to an electronic control unit, the hydraulic block including a plurality of pairs of pumping elements located in a horizontally opposed arrangement, and an embedded pressure sensor, the pressure sensor being adjacent to but vertically separated from the pumping elements.
摘要:
In an automotive vehicle braking system, a hydraulic brake actuator includes a wedge for locking a hydraulic piston in a brake position for purposes of applying a park brake. To apply the park brake, hydraulic pressure is increased to advance the piston to urge the brake pads against the rotor. With the piston in the brake position, an electrical solenoid is energized to advance the wedge to engage the piston. The wedge includes an inclined surface that contacts an inclined surface connected to the piston or the housing, with sufficient frictional force to maintain the wedge in the advanced position without requiring hydraulic pressure or electrical power. Thus, the park brake remains applied even when the vehicle is turned off.
摘要:
A compact controlled braking system including a hydraulic control unit having a first housing and a motor positioned within the first housing and an electronic control unit connected to the hydraulic control unit, the electronic control unit having a second housing, wherein at least a portion of the motor is received within the second housing.
摘要:
An ABS hydraulic modulator suitable for vehicular applications is provided. The design utilizes an electric motor which powers a hydraulic pump unit used to recirculate brake fluid during ABS operation. The hydraulic circuit components also include a normally closed ABS release solenoid valve, an integral spring-loaded piston accumulator, an isolation valve and check arrangement, a number of strategically placed flow control orifices and an optional hydraulic damper assembly.
摘要:
A method of edge coiling annular steel plates for transmission friction plate devices in which straight tapered strip steel stock with prime spline tangs on one edge are edge rolled into open annular steel plates with finished spline tangs leaving a gap between the unjoined free ends. The strip steel stock is slit into straight flat strips having a width double the total face width of the annular plate. The flat double width strip is rolled to provide a symmetrical tapered double width strip having a central thick flat portion and on each side a symmetrically tapered portion with thin edges. The double width tapered strip is blanked in the central portion to form uniformly spaced prime spline tangs each having a central recess and slit to divide the double width strip into two single width tapered strips with the recessed prime spline tangs on the thick edge. The single width tapered strips are edge rolled in an edge rolling machine feeding the strips in a straight guide to a coiling roll having a cylindrical surface with relief recesses and a tooth in each relief recess to engage the thick edge of the strip with the relief recesses providing clearance for the prime spline tangs and the tooth engaging the base of the central recess for uniform circular coiling and having side guides spaced apart the mean thickness of the tapered strip to hold the coil flat. Then the end coil is cut off to form the open annular steel plate.
摘要:
In a transmission having friction plate devices such as drive clutches and reaction brakes to establish drives, the friction plate devices have a plurality of alternate friction material faced complete annular steel plates and unfaced open annular steel plates both having spline tangs. A single width straight and transversely tapered strip having uniformly spaced recessed prime spline tangs is edge rolled into the annular plate with spline tangs.