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:
Mar. 24, 1981
Filed:
Jan. 09, 1979
Haruo Yuzawa, Tokyo, JP;
Tsuneomi Yano, Tokyo, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
Exhaust gas recirculation system controlled by a microcomputer for an internal combustion engine comprises a pressure sensor for measuring the pressure of the exhaust gas downstream of an orifice disposed in the exhaust gas recirculation passage, a microcomputer for electrically controlling an electromagnetic valve which fluidly controls an exhaust gas recirculation control valve arranged in the exhaust gas recirculation passage, in view of the comparison of an optimal pressure of the exhaust gases, derived from the engine parameters, and the actual pressure measured by the sensor. The gear position of the transmission, engine temperature, engine speed, and the intake airflow rate are used in the microcomputer to produce an output signal with which the electromagnetic valve is controlled.