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:
Aug. 15, 2000
Filed:
Feb. 12, 1999
Eaton Corporation, Cleveland, OH (US);
Abstract
An exhaust gas recirculation system (11) for an internal combustion engine, including a valve (25) having a closed position (FIG. 2) blocking flow of exhaust gas, the valve being biased by gas pressure in the exhaust gas passage (E) toward a closed position (FIG. 2). The system includes an electric motor (51) having an input gear (55) and a gear train (57,59) driving a sector gear (73). A linkage member (93) has its ends (91,95) connected to the sector gear (73) and the valve stem (29), respectively. The sector gear and the linkage member are configured such that, as the valve begins to open against exhaust gas pressure, the movement of the valve stem is a relatively higher force, and at a relatively lower speed. As the valve moves toward a fully open position (FIG. 7), the movement of the valve stem is at a relatively lower force, but at a relatively higher speed.