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. 15, 1980
Filed:
Jun. 07, 1978
Applicant:
Inventor:
Syunichi Aoyama, Yokohama, JP;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
1231 / ;
Abstract
An EGR control system consists of a pressure regulating valve assembly which functions to prepare a control vacuum for an EGR control valve in accordance with the relationship between venturi vacuum and the pressure in a particular part of an EGR passageway connecting an exhaust gas passageway to an intake passageway. A connecting passage connecting the particular part of the EGR passageway to the pressure regulating valve assembly is provided with a flow restricting orifice therein. The connecting passage is further provided with a check valve to induct atmospheric air into the connecting passage to clean up the flow restricting orifice.