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:
Apr. 26, 1983
Filed:
Aug. 24, 1981
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An air/fuel ratio control system for performing feedback control of the air/fuel ratio of an air/fuel mixture being supplied to an internal combustion engine. The air/fuel ratio control system is provided with an exhaust gas recirculation system which is adapted to use a pressure sensor and a temperature sensor for detection of conditions of interruption of the exhaust gas recirculation at low engine load and at low engine temperature. At the same time, the above sensors are used for detection of various engine operating conditions for control of the air/fuel ratio of the mixture, and are adapted to produce outputs continuously variable with wide ranges of changes in the absolute pressure in the intake system of the engine and in the engine temperature. The exhaust gas recirculation system thus precludes the use of special sensors and therefore has a simple exhaust gas recirculation control section.