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. 15, 1981
Filed:
Nov. 25, 1980
Kazuo Shinoda, Toyota, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Aichi, JP;
Abstract
An internal combustion engine comprising a secondary air feed control device for feeding secondary air into the exhaust passage from the air pump. The amount of the secondary air fed into the exhaust passage is controlled by the output signal of an oxygen concentration detector arranged in the exhaust passage. An air-fuel ratio control device is arranged in the main fuel passage of the carburetor for controlling the amount of air bled into the main fuel passage in response to the output signal of the oxygen concentration detector. The amount of the air bled into the main fuel passage is increased as the altitude becomes higher so as to reduce the difference between the stoichiometric air-fuel ratio and an air-fuel ratio of the mixture formed by the carburetor.