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:
Aug. 23, 1983
Filed:
Aug. 20, 1981
Kazuo Kobayashi, Hiroshima, JP;
Hideki Tanaka, Hiroshima, JP;
Katsuyoshi Iida, Hiroshima, JP;
Junji Kamite, Hiroshima, JP;
Toyo Kogyo Co., Ltd., Hiroshima, JP;
Abstract
An air-fuel ratio control system for an automobile engine of a type having a fuel injection system wherein at least two of parameters including the engine speed, the opening of a throttle valve and the negative pressure developed inside a fuel intake passage are utilized to detect the rate of flow of incoming air to be mixed with an injected mist of fuel to form a combustible mixture. The fuel injection system includes a fuel adjusting device so designed as to provide, when the engine operates within a particular operating region, the combustible mixture of an air-fuel mixing ratio lower than that to be supplied to the engine when the latter operates within the other operating region than the particular operating region. The control system comprises a first EGR control device for controlling an EGR control valve according to a control value stored in a memory when the engine operates within the particular operating region and a second EGR control device operable when the engine operates within the other operating region for controlling the EGR control valve in dependence on the concentration of a component of exhaust gases sensed by a composition sensor.