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. 22, 2000
Filed:
Nov. 18, 1998
Donald Dibble Stoltman, Henrietta, NY (US);
General Motors Corporation, Detroit, MI (US);
Abstract
An internal combustion engine includes a valve body having an intake air port and an EGR port. The engine also has an intake passage for transporting an intake air/EGR mixture from the valve body to an engine combustion chamber and an exhaust passage to exhaust gases from the combustion chamber. An EGR passage extends between the exhaust passage and the intake passage for transporting recirculated exhaust gases to the EGR port of the valve body. An intake air passage transports intake air to the intake air port of the valve body and to the intake passage. A valve assembly includes a rotatable shaft supported in the valve body extending across the intake air port and the EGR port. An EGR throttle plate is supported on the shaft and is operable to close the EGR port, and an air throttle plate is supported on the shaft and is operable to partially restrict the intake air port. The shaft rotates the EGR throttle plate and the air throttle plate to regulate flow through the intake air port and the EGR port to vary the proportion of recirculated exhaust gases delivered to the intake passage.