Patent Number: 6,169,950

Title: Method for controlling a vehicle drive unit having a continuously variable transmission

Abstract: A method for controlling a vehicle drive unit, which comprises a drive engine and a transmission with a continuously variable gear ratio, comprises the following steps: a) the required vehicle acceleration (ASOLL) is calculated from a throttle control lever position (XFP, XHG) and the current speed of travel (VFZ), b) a required transmission variation (IGDSOLL1) is calculated from the required vehicle acceleration (ASOLL) and the current rotation speed (NMOT) of the drive engine, c) a limited required transmission variation (IGDSOLL) is determined from the required transmission variation (IGDSOLL1) such that the engine rotation speed (NMOT) does not fall below a value which depends on the position of the power control element (XEP) of the drive engine, d) the continuously variable transmission is varied in accordance with (IGDSOLL); e) the actuation parameter (XEPSOLL) for the power control element of the drive engine is obtained directly from the throttle control lever position (XFP, XHG).

Inventors: Parigger; Martin (Eggersdorf, AT)

Assignee: Steyr-Daimler-Puch Aktiengesellschaft

International Classification: F16H 61/40 (20060101); F16H 61/46 (20060101); B60K 17/28 (20060101); B60K 25/00 (20060101); B60K 17/00 (20060101); F02B 3/06 (20060101); F02B 3/00 (20060101); B60K 041/04 (); F16H 059/06 ()

Expiration Date: 01/02/2018