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:
Jan. 16, 1979
Filed:
Sep. 26, 1977
Takashige Tokushima, Hiroshima, JP;
Hideki Tanaka, Hiroshima, JP;
Toyo Kogyo Co., Ltd., Hiroshima, JP;
Abstract
An exhaust gas recycling system for use in an internal combustion engine in which downstream exhaust gas recycling is started when the carburetor throttle valve is opened larger than a first predetermined opening degree, while upstream exhaust gas recycling is commenced when the carburetor throttle valve is opened larger than a second predetermined opening degree. The second predetermined opening degree is set at a level exceeding at least a maximum amount or peak value of the downstream exhaust gas recycling, and thereafter, reduction of downstream exhaust gas recycling ratio following decrease of intake negative pressure at the downstream of the carburetor throttle valve is compensated by increase of the upstream exhaust gas recycling augmented in proportion to the intake amount of the air-fuel mixture, through employment of flow rate control valves for the upstream and downstream exhaust gas recycling.