Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2008-09-26
2011-11-15
Cuff, Michael (Department: 3783)
Internal-combustion engines
Charge forming device
Fuel injection system
C239S132000, C239S124000
Reexamination Certificate
active
08056537
ABSTRACT:
An internal combustion engine, such as a direct injection compression ignition diesel engine, includes an engine housing having a plurality of cylinders and a plurality of fuel injectors associated one with each of the cylinders. The fuel injectors each include a first fuel inlet and a second fuel inlet, and an actuator subassembly which is configured to actuate a control valve assembly positioned within the fuel injector. The engine further includes a fuel system having a fuel supply circuit, and a cooling system for the actuator subassembly having a cooling circuit with a segment in common with a segment of the fuel system. The cooling system is configured to pass cooling fuel across a heat exchange interface of the actuator subassembly to exchange heat therewith. The actuator subassembly may include a piezoelectric actuator and a preloading spring, which are each fluidly sealed within a casing of the actuator subassembly.
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Hess Amy M.
Lakhapati Shriprasad
Lewis Stephen R.
Long Michael C.
Venkataraghavan Jayaraman K.
Caterpillar Inc.
Cuff Michael
Kim James
Liell & McNeil
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