Abstract: A variable flow rate valve (10) comprising; a housing (12) defining a vacuum chamber (35) and a flexible diaphragm (50) secured to said housing (12). The diaphragm defines one extreme of the pressure chamber (35) and is movable in one direction in response to decreases in the pressure within the pressure chamber and movable in an opposite direction in response to increases in the pressure within the pressure chamber. The valve (10) further includes means (40, 100, 110, 112) for providing a mechanical position limit or stop for the diaphragm in the one direction and means (126, 84, 86, 92, 94) for selectively varying the pressure within the pressure chamber for causing the diaphragm to move in response to the pressure differential thereacross.

Abstract: A drive (10) comprising a first (12) and a second (14) pulley rotationally isolated from an input shaft (16), and adapted to be drivingly connected to the input shaft. A plate (40) rotatable with the input shaft (16) and axially movable thereon between a first position in engagement with the first pulley and a second position in engagement with the second pulley (14); a rolling diaphragm (60) supported by one of the pulleys (12) for urging the plate (40) to move into engagement with the other of the pulleys (14), the diaphragm being attached to the one pulley (12) defining an activation chamber (80) therebetween, a controller (134) for communicating and modulating pressurized fluid to the activation chamber (80); and a spring (50) for biasing the plate toward and into engagement with the one pulley.

Abstract: A multi-speed accessory drive (10) employing a planetary gear reduction set (12). A cone clutch (89) linked to an output member (84), actuator (200) for moving the cone clutch (89) into engagement with the output pulley (84) and a band brake for selectively inhibiting the rotation of the ring gear (18) of the planetary gear set (12).

Abstract: A two speed accessory drive primarily for rotating engine driven accessories at either of two selectible speeds. The drive includes a drum rotatable with an input shaft. Positioned within the drum are a plurality of self-activating brake shoes that are moved into and out of engagement with the drum by a corresponding set of levers. The motion of the levers is controlled by the relative rotation between a plurality of disks positioned remote from the drum.

Abstract: A thermostat member (10) disposed within a coolant flow passage (12) of an engine comprises a valve (32,34,36,40,42) movable between first and second positions for opening and closing the flow passage (12) and when in the first condition prohibiting coolant to flow from the engine and when in the second condition permitting the coolant to flow to a heat exchanger. A thermally responsive element (22) contained within a housing portion (16), and coupled to the valve. The element expandable in volume, when exposed to a predetermined temperature so as to urge the valve into the first position to terminate flow therethrough and a heater (50) for increasing the temperature of the element above the temperature of the coolant, to cause the element to urge the valve into the second cindition.

Abstract: A two speed accessory drive (10) comprising an input unit (20) and a remotely positioned output unit (100) connected by a plurality of belts (108,100). The input unit is adapted to be driven by a remotely positioned driving member (102). The output unit, which is connected to the engine accessories by a serpentine belt (106), includes a linear actuator (280) for engaging and disengaging same.

Abstract: An EGR valve for an engine comprising: a housing including a plurality of passages for communicating exhaust gas and engine vacuum thereto, for supporting a movable diaphragm-piston assembly, a diaphragm-piston assembly for dividing the housing into an atmospheric chamber and a vacuum chamber, including a user cleanable, outwardly movable valve closure element for selectively sealing one of said passages and means for sensing the position of the assembly.

Abstract: A fan clutch having an engaged and disengaged mode of operation comprising: a plurality of centrifugal force responsive friction shoes for drivingly engaging an engagement surface; of the engagement and disengagement of the friction shoes controlled by plurality to disks, one of the disks rotatable relative to the other disk.

Abstract: A canister purge valve comprising: a housing (12) including a vacuum chamber (14) communicated to an extending vacuum port (16) and an opening (26); an assembly (40) received within the housing (12) including a valve seat (76) positioned within the vacuum chamber (14) and an axially extending inlet port (58) extending through the opening (26) in said housing (12). The valve including a plurality of passages (57, 60, 62) communicating the inlet port (58) to the vacuum chamber (14); valve means (90, 92, 94, 96) movably positioned within the vacuum chamber (14) for seating upon the valve seat means for biasing (98) the valve means (90, 92, 94, 96) against the valve seat (76) and means for generating (42, 44, 52, 100, 120) a magnetic flux signal in response to control signals for urging the valve means to seat upon said valve seat (76).

Abstract: A flow control system (10) responsive to fluid pressure comprising means (12, 20) for varying the magnitude of said pressure within a plurality of different pressure ranges; a plurality of pressure responsive valves (30, 32) communicated with said pressure means, each valve having at least two operative conditions; means (40, 42, 44, 46, 52, 54, 56, 58) for sequentially changing the operative condition of a particular one of said plurality of pressure responsive valves in response to changes in the magnitude of pressure communicated thereto.

Abstract: A drive system (10) for rotating a plurality of engine mounted accessories comprising an input member (16) supporting a crank unit (12) and a remotely positioned auxiliary drive unit (14). The units include a plurality of output pulleys (22, 30, 90, 98) linked by drive belts (100, 102). The crank unit (12) comprises an axially movable clutch (38) and an electric responsive actuator (50, 66, 68, 72) for moving the clutch between engaged and disengaged conditions, including means for compensating for the wear of the internal components of the drive unit to affect repeatable engagement intervals.

Abstract: A system including a throttle body communicating intake air to the intake manifold of an engine, the throttle body including a movable throttle plate. A vacuum responsive idle speed bypass valve is used to bypass intake air around the throttle plate and into the intake manifold, a vacuum responsive EGR valve is used for regulating the amount of exhaust gas permitted to be recirculated into the intake manifold, a single electric vacuum regulating (EVR) communicated to a vacuum inport port, the idle speed bypass valve and EGR valve to be employed to vary the degree of manifold vacuum communicated thereto.

Abstract: An idle restart clutch system adopted to mechanically engage the crankshaft of an engine for use in restarting same comprising a spool body adapted to engage the crankshaft for rotating therewith; a momentum wheel mounted relative to the crankshaft for storing rotational energy; a drive for transferring rotational energy from the spool body to the momentum wheel during interval as determined by the rotational speed differential therebetween; and a torque limiting clutch mounted to and rotatable with the momentum wheel for controlling slippage motion between the momentum wheel and engine in response to control signals to enable the energy of the momentum wheel to be transferred to the spool body and thereafter to the crankshaft of the engine to enable rotation of same.

Abstract: A two speed drive comprising: a driving member; a rotatable driven member coaxially positioned relative to the driving member; a planetary gear system rotatable with the driving member and with the driven member for providing in one condition a non-reducing speed drive and for providing in a second condition a speed reducing drive therebetween, the gear system including a sun gear drivingly engaging the driving member, a ring gear mounted for rotation about said driving member, and a plurality of planetary gears interconnecting the sun gear and the ring gear, the driven member attached to and carried with the planetary gears; and a electromagnetic clutch, operable in a first mode for simultaneously driving the sun gear and the ring gear in the one condition to establish a non-reducing speed drive and operable in a second mode to rotationally lock the ring gear for driving the driven member through the sun gear and the planetary gears at a speed less than the speed of the driving member.

Abstract: An air temperature control system for an engine including an intake manifold, an air mixing housing in communication with said intake manifold; the system includes a control unit means, responsive to at least one engine operating parameter and to the temperature of the air delivered to the intake manifold for generating an actuator control signal in accordance with a stored programmed temperature profile; actuator means responsive to the actuator control signal and mechanically linked to the movable air mixing valve for adjusting the air mixing valve in proportion to the actuator control signal; and means for sensing the temperature of the mixed air delivered to the intake manifold.

Abstract: A cooling system for use with an engine and an associated engine driven flywheel. The system includes: centrifugal blower means fitted to and rotatable with the flywheel for developing a pressure differential thereacross; a housing enclosing said flywheel and said blower means for defining an air passage having a housing inlet for communicating air to said blower means and an output for permitting the discharge of air therethrough; air cooled heat exchange means connected to and positioned relative to the housing to permit air to flow therethrough by virtue of the operation of the blower means; damper means responsive to at least one engine operating parameter, for controlling the air flow through the heat exchange means; and compartment means for enclosing the blower means and housing and oriented to prohibit the entrance of ram air thereto and including inlet means for receiving non-ram air.

Abstract: A cooling system for use with an engine and an associated engine driven flywheel. The system includes: centrifugal blower means fitted to and rotatable with the flywheel for developing a pressure differential thereacross; a housing enclosing said flywheel and said blower means for defining an air passage having a housing inlet for communicating air to said blower means and an output for permitting the discharge of air therethrough; air cooled heat exchange means connected to and positioned relative to the housing to permit air to flow therethrough by virtue of the operation of the blower means; damper means responsive to at least one engine operating parameter, for controlling the air flow through the heat exchange means; and compartment means for enclosing the blower means and housing and oriented to prohibit the entrance of ram air thereto and including inlet means for receiving non-ram air.

Abstract: A double acting drive mechanism (10) includes a driving member (12) and a pair of driven members (16) and (18) which carry a small diameter pulley face (24) and a larger diameter pulley face (26) respectively. A clutch mechanism (34) normally couples one of the driven members (16) for rotation with the driving member (12) and the driven member (18) freewheels. Upon energization of the electromagnetic actuator (48), the armature (56), which rotates with the other driven member (18), engages the clutch mechanism (34) to couple the other driven member (18) for rotation with the driving member (12). Engagement of the armature (56) with the clutch mechanism (34) disengages the clutch mechanism (34) from the one driven member (16).