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:
Mar. 24, 1998
Filed:
May. 10, 1996
Herbert Depping, Giengen, DE;
Friedrich Haberle, Heidenheim, DE;
Wilfried Maier, Heidenheim, DE;
Erwin Rotter, Nattheim, DE;
Volker Schempp, Weilheim, DE;
Voith Turbo GmbH, Heidenheim, DE;
Abstract
The invention concerns a method for operation of a drive unit of a vehicle, including a drive machine and a transmission with at least two gears. A quantity that characterizes acceleration of the vehicle and a quantity that characterizes the power of the drive engine are continuously determined. A gear shift speed range and a second speed range bounded by a lowest and highest attainable speed in the target gear can be established for a gear shift process in the initial gear. The gear shift speed range is bounded at least by a lower gear shift speed and an upper gear shift speed and the second speed range is bounded by a lower target speed, as well as an additional speed. The gear shift process is initiated as a function of the determined acceleration. The lower target speed is achieved in a gear shift process in a first limiting stage (high acceleration at low input speeds or limited deceleration at low input speeds) during initiation of a gear shift at a number of gear shift speeds. The gear shift process between the first limiting state and the highest attainable speed in the target gear is initiated as a function of the determined quantities in the gear shift speed range in the initial gear.