Abstract: The booster is installed downstream of a vehicle's power steering gear. The booster has a power piston and a valve seat piston assembly reciprocably mounted in a bore of the booster housing. The valve seat piston assembly includes two nested control pistons separated by a rubber cushion member which permits limited relative control piston movements. Hydraulic inlet pressure is introduced into the housing bore between these pistons and flows through a normally open poppet valve, which acts as a booster control valve. Movement of the booster input push rod restricts hydraulic fluid flow through the control valve and causes pressure to be built up in the power chamber between the power piston and the valve seat piston assembly. The pressure acts on the power piston to move the booster output member. The pressure also holds one of the control pistons of the valve seat piston assembly in position against the bore end wall so that it does not move during normal power boost operation.

Abstract: An engine turbocharger includes a bearing housing, which supports a rotor shaft carrying turbine and compressor impellers on opposite ends of the shaft, and enclosed by turbine and compressor housing members secured to the bearing housing and defining therewith fluid inlet and outlet passages for the turbine and compressor. The turbocharger is provided with an integral wastegate including (1) a poppet valve supported by the turbine housing and controlling bypass passages in the housing between the turbine inlet and outlet passages and (2) an actuating piston in the compressor housing exposed through internal passage means to gas pressure in the compressor outlet and engagable with the poppet valve stem so as to urge the valve in an opening direction as a function of compressor outlet pressure. The shaft bearing lubrication and cooling passages are arranged to also lubricate the wastegate valve stem and spring.

Abstract: A vehicle suspension system includes a vehicle sprung mass and a suspension control arm connected to and being a part of the unsprung mass. A suspension spring seats on an upper spring seat on the vehicle frame and on a lower spring seat mounted on the control arm. A brake actuating pressure proportioner is mounted on the control arm and has a spring loaded proportioning piston therein for proportioning the brake pressure through the proportioner. A plunger loads the proportioning spring to establish the brake pressure point at which proportioning action begins. A cap fits over the outer end of the plunger and is movable with the plunger.

Abstract: A brake pressure proportioner is mounted on a sprung portion of a vehicle and is attached to an unsprung portion by means of a modifying arm. The arm has ends pivoting on the unsprung portion and on a proportioner control arm so that the arm maintains a constant length during relative movements of the vehicle sprung and unsprung portions, modifying the action of the brake proportioner in accordance with such movements. The movements are proportional to vehicle load. The arm provides for compression or extension without affecting the proportioner when unsprung movements between gross vehicle curb weight (no load) and gross vehicle full weight (full load) positions are exceeded in either direction. The movement of the unsprung portion of the vehicle below the position for curb weight is known as rebound and above the curb weight position is known as jounce. The excess jounce travel beyond the gross vehicle full weight causes the arm to compress without further modifying the proportioner.

Abstract: A master cylinder assembly has a stamped steel reservoir and a cover in which a switch, appropriate electrical conduits, and a connector are integrally molded. A fluid level sensor float and rod are arranged to open and close the switch depending upon the level of fluid in the reservoir. A diaphragm seal is assembled to the underside of the cover and has a rod guide provided for the sensor rod. The guide also provides a suitable vent between the fluid chamber of the reservoir and the otherwise sealed space between the diaphragm and the cover. The cover has a peripheral channel receiving a peripheral mounting edge of the diaphragm so that the diaphragm also acts as a seal between the cover and the reservoir housing. The sealing action is primarily radial, between a channel wall and the reservoir housing wall, therefore not requiring the cover to be tightly clamped in place in order to compress a seal. The cover assembly is snapped into place on the reservoir housing.