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. 11, 2000
Filed:
Jul. 06, 1998
Subbaraya Radhamohan, Novi, MI (US);
Mark Leonard, Canton, MI (US);
David Turner, Bloomfield Hills, MI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A control (60) for an EGR valve (24) including an actuator (16) for moving the EGR valve (24) between a closed position and an open position, and a position sensor (48) for detecting the position of the EGR valve (24) and generating a position output signal. A processing circuit (70,72) receives the position output signal and transmits electrical control signals to energize the actuator (16) and move the EGR valve (24). Control logic is implemented whereby, when the EGR valve (24) is moving towards the closed position, the processing circuit (70,72) transmits first electrical control signals for energizing the actuator (16) in a first predetermined manner when the position output signal indicates that the EGR valve (24) is at least a predetermined distance away from the closed position. When the position output signal indicates that the EGR valve (24) is less than the predetermined distance away from the closed position, the processing circuit (70,72) transmits second electrical control signals for energizing the actuator (16) in a second predetermined manner.