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:
Jul. 17, 2007
Filed:
Jan. 04, 2005
Arun Kumar Seksaria, Cedar Falls, IA (US);
Mervin Peter Kizlyk, Cedar Falls, IA (US);
Robert Eugene Kasten, Denver, CO (US);
Arun Kumar Seksaria, Cedar Falls, IA (US);
Mervin Peter Kizlyk, Cedar Falls, IA (US);
Robert Eugene Kasten, Denver, CO (US);
Deere & Company, Moline, IL (US);
Abstract
A vehicle electric drive system has an internal combustion engine which drives an electric generator. The generator powers a motor which drives the wheels. The system has operator controls including a speed control member movable from a zero speed position to a high speed position, an FNR direction control member having forward, neutral and reverse positions. The system also includes a wheel speed sensor and an electronic control unit. Upon startup, the control unit senses the position of the direction control member, senses wheel speed, and senses position of the speed control member. The controller prevents vehicle operation if the direction control member is not in its neutral position, or the sensed wheel speed is not close to zero, or the speed control member is not near its zero speed position. The controller permits vehicle operation if the direction control member is in its neutral position, and the sensed wheel speed is close to zero, and the speed control member is near its zero speed position.