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:
Jan. 20, 1981
Filed:
Dec. 13, 1978
Applicant:
Inventor:
Kenji Okamura, Yokohama, JP;
Assignee:
Nissan Motor Company, Limited, Yokohama, JP;
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
123568 ; 123571 ;
Abstract
An EGR control system for an internal combustion engine, comprises an EGR passage connecting between the intake and exhaust passages of the engine and formed with an orifice therein, an EGR control valve for controlling the amount of exhaust gas passing through the EGR passage, a regulating valve for controlling the operation of the EGR control valve, and a device, for changing a preset condition of the regulating valve in accordance with engine operating conditions, so that EGE rate can be controlled to desirable values from view points of driveability and fuel economy.