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:
Jun. 21, 2005
Filed:
Dec. 04, 2002
Travis E. Barnes, Metamora, IL (US);
Judson R. Bruce, Chillicothe, IL (US);
Sean O. Cornell, Gridley, IL (US);
Douglas E. Handly, Morton, IL (US);
Scott A. Leman, Eureka, IL (US);
David M. Milam, Bloomington, IL (US);
Wade J. Robel, Normal, IL (US);
Di Wu, Ashland, WI (US);
Travis E. Barnes, Metamora, IL (US);
Judson R. Bruce, Chillicothe, IL (US);
Sean O. Cornell, Gridley, IL (US);
Douglas E. Handly, Morton, IL (US);
Scott A. Leman, Eureka, IL (US);
David M. Milam, Bloomington, IL (US);
Wade J. Robel, Normal, IL (US);
Di Wu, Ashland, WI (US);
Caterpillar Inc, Peoria, IL (US);
Abstract
An engine valve actuation system is provided. The engine valve actuation system includes an intake valve that is moveable between a first position to prevent a flow of fluid and a second position to allow a flow of fluid. A cam assembly is configured to move the intake valve between the first position and the second position. A fluid actuator is configured to selectively prevent the intake valve from moving to the first position. A source of fluid is in fluid communication with the fluid actuator. A directional control valve is configured to control a flow of fluid between the source of fluid and the fluid actuator. A check valve is disposed between the directional control valve and the source of fluid, only allowing fluid flow from the fluid source to the directional control valve. A bleed orifice may be disposed between the directional control valve and the source of fluid, in parallel with the check valve.