SYSTEM AND METHOD FOR PREVENTING PISTON-VALVE COLLISION ON A NON-FREEWHEELING INTERNAL COMBUSTION ENGINE

Title:

SYSTEM AND METHOD FOR PREVENTING PISTON-VALVE COLLISION ON A NON-FREEWHEELING INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO2005072085

Kind Code:

A3

Abstract:

A valve actuation system and method for use in an internal combustion engine including at least one combustion cylinder having a piston and an engine valve. The valve actuation system includes a hydraulic pump, a high-pressure reservoir, and an electro-hydraulic valve actuator. The hydraulic pump is configured to produce a hydraulic output based on a valve-piston clearance profile of at least one cylinder of the combustion engine. The high-pressure reservoir is coupled with the hydraulic pump. The electro-hydraulic valve actuator is coupled with the high-pressure reservoir via a first control valve and configured to actuate at least one engine valve of the combustion engine according to an output of the hydraulic pump.

Inventors:

TAI CHUN (US)
SUDER TIMOTHY A (US)
JACQUES WATLER CURTIS (US)
SHADE BENJAMIN C (US)

Application Number:

PCT/US2004/040179

Publication Date:

November 03, 2005

Filing Date:

December 02, 2004

Export Citation:

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Assignee:

MACK TRUCKS (US)
TAI CHUN (US)
SUDER TIMOTHY A (US)
JACQUES WATLER CURTIS (US)
SHADE BENJAMIN C (US)

International Classes:

F01L9/11; (IPC1-7): F01L9/02

Foreign References:

US6591795B2	2003-07-15
US5537976A	1996-07-23
US6092495A	2000-07-25
US6321703B1	2001-11-27

Other References: