Method and arrangement for actuating an automatic transmission

Details Method and arrangement for actuating an automatic transmission Method and arrangement for actuating an automatic transmission

1994-09-01

1996-03-26

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Control by sensed ambient condition, pattern indicia,...

B60K 4104

Patent

active

055016448

ABSTRACT:
The invention is directed to an arrangement for actuating an automatic transmission of a motor vehicle which is equipped with a drive unit wherein fuel is consumed. The transmission ratios are then so adjusted that the drive unit is driven in its operating range wherein consumption is optimal. The adjustment of the transmission ratio takes place in dependence upon at least a first signal (nab) representing the transmission output rpm and/or the engine rpm and/or the transmission input rpm. Furthermore, the adjustment of the transmission ratio is dependent upon a second signal (moab) which represents a desired value for the torque outputted by the transmission. The adjustment of the transmission ratio then takes place with the aid of a comparison of the first signal and/or the second signal to at least one threshold value (moabstst). According to the invention, the one threshold value is at least dependent upon parameters which influence the maximum torque to be outputted by the drive unit to the transmission.

REFERENCES:
patent: 4972737 (1990-11-01), Makimoto
patent: 5069084 (1991-12-01), Matsuno et al.
patent: 5131293 (1992-07-01), Kaiser et al.
patent: 5157991 (1992-10-01), Sumimoto
patent: 5199326 (1993-04-01), Iwatsuki et al.
patent: 5275069 (1994-01-01), Baba et al.
patent: 5325740 (1994-07-01), Zhang et al.
patent: 5345843 (1994-09-01), Fujita et al.
patent: 5428531 (1995-06-01), Hayafune

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