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. 08, 1985
Filed:
Aug. 18, 1982
Setsuhiro Shimomura, Hyogo, JP;
Yuuji Kishimoto, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An electric-type air-to-fuel ratio control system for an internal combustion engine in which the air-to-fuel ratio sucked into the cylinders of the engine is maintained substantially constant following abrupt deceleration. In accordance with the invention, a bypass flow of air is provided into the intake manifold of the engine downstream of the throttle valve and a fuel injection valve using an electrically controlled air supplying device. The air supplying device is opened following closure of the throttle valve to supply an additional flow of air which compensates for overrichness in the air-to-fuel mixture caused by the delay of fuel injected from the fuel injection valve to the cylinders of the engine. Preferably, the time during which air is supplied through the air supplying device and the flow rate of air therethrough is adjusted so as to maintain a predetermined air-to-fuel ratio following deceleration.