The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 2011
Filed:
Sep. 26, 2008
Jayaraman K. Venkataraghavan, Dunlap, IL (US);
Michael C. Long, Metamora, IL (US);
Shriprasad Lakhapati, Peoria, IL (US);
Stephen R. Lewis, Chillicothe, IL (US);
Amy M. Hess, Metamora, IL (US);
Jayaraman K. Venkataraghavan, Dunlap, IL (US);
Michael C. Long, Metamora, IL (US);
Shriprasad Lakhapati, Peoria, IL (US);
Stephen R. Lewis, Chillicothe, IL (US);
Amy M. Hess, Metamora, IL (US);
Caterpillar Inc., Peoria, IL (US);
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.