Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Patent
1997-03-31
1998-11-17
Louis Jacques, Jacques H.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
701 95, 701 74, 701 90, 701 65, 477 49, 477115, G06G 770
Patent
active
058390839
ABSTRACT:
A gear shift control device of an automatic transmission of a vehicle, including: a means for estimating a target shift stage for harmonizing rotation speed and power output of engine of the vehicle; a means for estimating slip angle of at least one of the pair of drive wheels; a means for estimating slip ratio of the at least one drive wheel which would be caused thereon by the automatic transmission being shifted to the target shift stage; a means for estimating tire grip of the at least one drive wheel based upon the estimated slip angle and the estimated slip ratio; a means for judging if the estimated tire grip of the at least one drive wheel is in a grip range predetermined therefor; and a means for executing gear shift of the automatic transmission when the target shift stage is different from a current shift stage with the estimated tire grip being within the predetermined grip range.
REFERENCES:
patent: 4901811 (1990-02-01), Uno et al.
patent: 5029493 (1991-07-01), Takada et al.
patent: 5676433 (1997-10-01), Inagaki et al.
patent: 5679092 (1997-10-01), Otsubo et al.
patent: 5704695 (1998-01-01), Monzaki et al.
patent: 5717591 (1998-02-01), Okada et al.
Jacques Jacques H. Louis
Toyota Jidosha & Kabushiki Kaisha
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