Transmission control for a motor vehicle with adaptation of shift points to driving habits of a driver

US5436834A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Friedrich Graf · Eggenfelden, DE
• August Kammerl · Altentreptow, DE

Key dates

• Filing date: Nov 2, 1993
• Grant date: Jul 25, 1995
• Expiry date: Nov 2, 2013

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/0096
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a transmission control for a motor vehicle, the load acting on the motor vehicle, the engine rpm and the engine torque are taken into consideration when determining a point for shifting gears. A circuit determines if the engine torque lies above a first threshold value characterizing a traction operation of a motor vehicle, as a first condition; if an amount of acceleration lies below a second threshold value characterizing unaccelerated drive, as a second condition; and if the engine torque lies above a torque characterizing a movement resistance on a level surface plus a third threshold value, as a third condition. A signal is generated when the first, second and third conditions have been met for displacing the point for shifting gears in a direction of increased output rpm.