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. 02, 1979
Filed:
Sep. 19, 1977
Tadayoshi Hirano, Susono, JP;
Michio Kawagoe, Susono, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
An arrangement for controlling an air-fuel ratio of an air-fuel mixture depending on changes in the operating condition of an internal combustion engine provided with a catalytic converter comprises a main fuel passage to supply a fuel forming part of a lean air-fuel mixture distributed into the engine, an enriching fuel supply passage which is opened by a valve actuated in response to an output of an operating condition-detecting means to enrich the lean air-fuel mixture to a level slightly leaner than a stoichiometric air-fuel ratio, and an additional fuel supply passage having an additional fuel supply nozzle capable of supplying a predetermined amount of an additional fuel into the engine to minutely correct the air-fuel ratio of the slightly leaner air-fuel mixture to the stoichiometric air-fuel mixture level.