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:
Sep. 28, 1976
Filed:
Oct. 20, 1975
Douglas I Fales, Flint, MI (US);
William H Holl, Flint, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A combustion engine with a carburetor and exhaust means is provided with an atmospheric air heater such as an exhaust stove. A metering valve supplies a variable mixture of heated air from the exhaust stove and cooler atmospheric air to the carburetor. The changing temperature and hence density of the air supplied to the carburetor produces a changing air-fuel ratio to the engine; and an oxygen sensor in the exhaust system generates a signal indicative of this ratio, which signal is applied through a feedback control system to actuation means for the metering valve to maintain the engine air-fuel ratio at a substantially constant predetermined level.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile