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:
Jul. 07, 2009
Filed:
Oct. 16, 2006
Stephen M. Wiley, East Peoria, IL (US);
Brian K. Garman, Groveland, IL (US);
Earl A. Pilgrim, Peoria, IL (US);
Scott A. Leman, Eureka, IL (US);
Stephen M. Wiley, East Peoria, IL (US);
Brian K. Garman, Groveland, IL (US);
Earl A. Pilgrim, Peoria, IL (US);
Scott A. Leman, Eureka, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
An engine that includes two intake and two exhaust valves for each cylinder is equipped for single valve constant lift engine braking. The exhaust valves may be actuated in a conventional manner via a rotating cam and a rocker arm coupled to a bridge that spans between the pair of exhaust valves. Engine braking is accomplished by actuating a brake actuator to hold one of the exhaust valves partially open, while the other of the two exhaust valves is allowed to close. Seating velocity of the non-braking valve is limited by including a second actuator button, namely a valve seating actuator, on the rocker arm that engages the valve bridge above the non-braking valve as it moves toward its closed position when the brake actuator is actuated.