Abstract: A diesel fuel system including a cam actuated unit injector employing a single control valve controlling the establishing and disestablishing of a hydraulic link in a timing chamber between a driven piston and a metering piston. The cam is configured to temporarily halt the upward motion of the pumping piston during a fuel metering period and until the disestablishment of the hydraulic link.

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: An injector including a self-actuating three-way valve lodged in a passage between the fuel injector supply inlet and a control valve. The three-way valve permits fuel to flow from supply through to the control valve during a metering mode of operation while prohibiting fuel to be dumped to the supply line during the pre-injection timing phase of operation.

Abstract: Circuitry (20) for activating fuel injectors (50) of an internal combustion engine including a plurality of switching circuits (60) for turning on and off associated hybrid power circuits (80). The hybrid power circuits (80) communicate the increased level of voltage generated by a single boost voltage generator (70) to particular injectors (50).

Abstract: A differential drive mechanism (10) includes a driving member (12) and a driven member (16). A planetary gearset (64) drivingly connects the driving member (12) and driven member (16) to drive the driven member (16) at a speed lower than that of the driven member (12) when the electromagnetic actuator (46) is energized. When the electromagnetic actuator (46) is not energized, a clutching member (22) engages the driven member (16) to cause the latter to be driven at the same speed as that of the driving member (12).