Engine having fuel injector with actuator cooling system and method
US8056537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2008 |
| Grant date | Nov 15, 2011 |
| Priority date | — |
| Expiry date | Jun 18, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2700/077
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.