Method of gear detection for controlling drive torque

Details Method of gear detection for controlling drive torque Method of gear detection for controlling drive torque

1994-10-03

1996-10-08

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Engine controlled by transmission

477111, 36442601, G01D 116, G01P 300, B60K 2816

Patent

active

055625690

ABSTRACT:
The invention is based on a motor vehicle having a drive unit (101) and a transmission (103) which is operatively connected to the drive unit by way of a converter unit (102) and which automatically changes its step-ups, whereby at least two wheels (104) of the motor vehicle are driven. For the purpose of gear detection in accordance with the invention, the mean velocity (Vrad) or the mean rotational speed of the driven wheels is detected and/or ascertained, and the output rotational speed N(Nmot) of the drive unit is detected. Furthermore, a variable (Nmot/Vrad), representing the ratio of the output rotational speed of the drive unit to the mean wheel velocity or the mean wheel rotational speed, is formed. This variable is then compared with at least two threshold values ((Sup, Sdown), wherein change-up or change-down operations of the transmission are inferred from the comparison result. With knowledge of change-up or change-down operations, the step-up of the transmission (Gi) actually set may then be inferred on the basis of the step-up set before the comparison.

REFERENCES:
patent: 4680988 (1987-07-01), Mori
patent: 5016175 (1991-05-01), Baltusis et al.
patent: 5072631 (1991-12-01), Fujimoto et al.
patent: 5103398 (1992-04-01), Akiyama
patent: 5103928 (1992-04-01), Danner et al.
patent: 5325740 (1994-07-01), Zhang et al.
patent: 5333108 (1994-07-01), Hessmert et al.

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