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. 29, 1991
Filed:
Sep. 15, 1989
Danny R Taylor, Groton, NY (US);
Borg-Warner Automotive, Inc., Sterling Heights, MI (US);
Abstract
A control system for continuously variable transmissions is operative in a number of functional modes. A 'neutral mode' fully disengages a clutch and sets a variable ratio to an extreme low ratio when a gear shift is in a neutral position. A 'hold mode' slightly engages the clutch to cause a finite amount of vehicle creep when the gear shift is in a forward or reverse position and a throttle is fully released. A 'normal start mode' partially engages the clutch when the gear shift is in a forward or reverse position and the throttle is depressed. A 'drive mode' fully engages the clutch and sets the variable ratio to maintain a predetermined engine speed when the vehicle is travelling at greater than a predetermined minimum vehicle speed and the clutch is slipping at less than a predetermined amount of clutch slip.