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:
Oct. 02, 2001
Filed:
Oct. 14, 1999
Applicant:
Inventors:
Kwang Yew, Chatham, CA;
John Edward Cook, Chatham, CA;
Assignee:
Siemens Canada Limited, Mississauga, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02M 2/507 ;
U.S. Cl.
CPC ...
F02M 2/507 ;
Abstract
An EGR valve has two coaxial valve rings that are sequentially opened when the EGR valve is operated. A first, smaller gap is formed by the first valve ring opening and a second larger gap is formed when the first valve ring moves with respect to the second valve ring. In this manner, a nonlinear flow rate is provided through the EGR valve that permits greater accuracy of control at lower exhaust gas flow rates.