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:
Jul. 28, 1981
Filed:
Dec. 11, 1979
Tatehito Ueda, Susono, JP;
Abstract
An exhaust gas recirculation control system for particular application to a diesel engine, which has an exhaust gas recirculation control valve, and a means for actuating the exhaust gas recirculation control valve, which positions the exhaust gas recirculation control valve selectively and steppedly at one of three states, that are: a first state in which it provides substantially zero exhaust gas recirculation ratio, a second state in which it provides a medium exhaust gas recirculation ratio, and a third state in which it provides a maximum exhaust gas recirculation ratio, according to the load on the engine, so that the valve is steppedly shifted from the third state toward the first state via the second state as engine load increases.