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:
Dec. 27, 1983
Filed:
Jan. 29, 1982
Kichihiko Dozono, Yokosuka, JP;
Yoji Hasegawa, Yokohama, JP;
Nissan Motor Company, Ltd., Yokohama, JP;
Abstract
In an exhaust gas recirculation system for an internal combustion engine having an intake manifold in which a throttle valve is disposed and an exhaust gas conduit provided with a particle trap for accumulatively catching particles entrained by exhaust gas discharged from the engine, a control valve apparatus which is disposed in a recirculation passage and connected to the intake manifold downstream of the throttle valve and to the exhaust gas conduit upstream of the particle trap. The control valve apparatus comprises a first control means which is adapted for controlling the exhaust gas recirculation on the basis of the vacuum pressure prevailing in the intake manifold downstream of the throttle valve, and a second control means which is adapted for cooperating with the first control means to maintain optimum exhaust gas recirculation despite an increase in the pressure of the exhaust gas caused by clogging of the particle trap.