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. 19, 1999
Filed:
Jan. 13, 1998
Charles A Detweiler, Durand, MI (US);
Daniel L DeLand, Davison, MI (US);
Barbara J Erickson, Holly, MI (US);
Gerrit V Beneker, Algonac, MI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A fuel vapor canister purge control valve assembly has an electric valve and a pressure regulator valve for connection at its inlet to a canister fluidically in series in a common housing. The electric valve has a spherical magnetically permeable operator biased closed against the seat by a balanced rotary armature. A C-shaped solenoid pole frame defines diametrally oppositely disposed radial working air gaps with the armature. Upon PWM energization of the solenoid, the armature rotation permits the spherical valve member to move from the seat to open the valve. A venturi is formed in the electric valve inlet and the venturi throat has a pressure tap connected to provide a reference pressure for one side of the pressure regulator diaphragm. The opposite side of the regulator diaphragm has an elastomeric obturator and is exposed to the outlet pressure of the electric valve. The elastomeric obturator is moveable with respect to another valve seat for controlling flow to the outlet for connection to an engine inlet manifold.