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:
Oct. 31, 1978
Filed:
Jan. 05, 1977
Yuuichi Takano, Toyota, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
Disclosed is an exhaust gas recirculation apparatus for an internal combustion engine, by which the exhaust gas from a vacuum operated flow control valve connected to the exhaust system of the engine is recirculated into the intake system of the engine at a position located upstream of the throttle valve or at a position located downstream of the throttle valve in accordance with engine operating conditions. The exhaust gas is recirculated at the position downstream of the throttle valve when the engine is operating under a low rotational speed condition, while the exhaust gas is recirculated at the position upstream of the throttle valve when the engine is operating under a high rotational speed condition. A sufficient amount of exhaust gas can be recirculated during all engine operating conditions.