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. 27, 2001
Filed:
Nov. 04, 1998
Joseph M. Vorih, West Suffield, CT (US);
James F. Egan, III, Suffield, CT (US);
Diesel Engine Retarders, Inc., , DE (US);
Abstract
A lost motion valve actuation system for an internal combustion engine is disclosed. The system includes a motion feedback system (,) for detecting the motion and timing of a valve actuator (,) and an engine valve (,). By providing information on the condition of the engine during operation, the motion feedback system (,) permits adjustment of the valve actuation system that can optimize operation or prevent engine damage. The motion feedback system may be used in a common rail or a lost motion valve actuation system. In alternate embodiments, the valve actuation system includes an accumulator (,) with an accumulator piston (,) whose motion is limited by an accumulator stop (,) or a control valve (,). The limited accumulator (,) controls the amount of lost motion in the valve actuation system to provide fail-safe operation in the event of electrical failure. The valve actuation system is operable for engine positive power, compression release braking, and exhaust gas recirculation modes of operation.