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:
Nov. 17, 1992
Filed:
Sep. 09, 1991
Applicant:
Inventor:
Cyril E Bradshaw, Wheaton, IL (US);
Assignee:
Eaton Corporation, Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02M / ;
U.S. Cl.
CPC ...
606052 ; 123568 ;
Abstract
A controller and method for controlling EGR in a pressure boosted engine. A valve seat is provided in the EGR passage and a hollow actuator rod is moved by a pressure-responsive diaphragm to control flow. The diaphragm senses boost inlet pressure in a chamber supplied through a port in the rod which extends through the boost air inlet passage. In another embodiment a restrictor valve is provided in the exhaust pipe downstream of the EGR passage. The valve is closed at idle to divert exhaust to the EGR passage. As boost pressure increases, a separate pressure tap supplies a second pressure-responsive diaphragm to open the restrictor valve.