Method of operation of a drive unit and device for execution of

Details Method of operation of a drive unit and device for execution of Method of operation of a drive unit and device for execution of

1996-05-10

1998-03-24

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

F16H 6102

Patent

active

057306826

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.

REFERENCES:
patent: 5315514 (1994-05-01), Steeby et al.
patent: 5484350 (1996-01-01), Ishikawa et al.
patent: 5515272 (1996-05-01), Sakai et al.
patent: 5531654 (1996-07-01), Ishikawa et al.
patent: 5555170 (1996-09-01), Nakashima
European Search Report on European Patent Application No. 96 10 5976.3, dated Jun. 4, 1997.

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