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:
Feb. 26, 2002
Filed:
Apr. 25, 2000
Patrick Speicher, Oberteuringen, DE;
Armin Gierling, Langenargen, DE;
ZF Batavia, L.L.C., Batavia, OH (US);
Abstract
The invention relates to a method for manual control of the ratio of a continuously variable transmission (CVT) for a vehicle. The CVT has one control device, one shifting or selector device, one starting element and one variator for ratio adjustment and is driven by an internal combustion engine. The control device processes input signals derived from a driver-vehicle system within the scope of an operating strategy under the control of the reduction ratio, the rotational speed of the prime mover, or an input rotational speed of the variator. The operation strategy automatically selects in an automatic operating mode the transmission ratio. In a manual operating mode, the driver can engage directly in the selection of the transmission ratio via the shift or selector device. It is proposed that in the operating mode there is manually preset a signal proportional to the vehicle speed which is further processed as a theoretical guidance for the operating point of the engine-transmission unit. The speed-regulating device controlled on the transmission side can be combined within the manual operating mode with the direct engagement in the selection of the transmission ratio.