Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Patent
1997-12-02
1999-12-14
Nguyen, Tan
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
701 66, 477120, F16H 6106
Patent
active
060029773
ABSTRACT:
A control system for a vehicle with an automatic transmission adapted to prohibit the upshifting from a second shift stage to a third shift stage upon generation of a slipping of driven wheels. When an accelerator pedal is depressed to increase the throttle opening degree TH in order to permit the vehicle to be started to travel on an icy surface and the like having a lower road surface friction coefficient, the vehicle speed V detected based on the number of rotations of an output shaft of an automatic transmission is rapidly increased due to the generation of a slipping, whereby the upshifting from the second shift stage to the third shift stage is prohibited. A vehicle speed generated on a usual flat road is previously stored, and a presumed vehicle speed VYS is calculated from such vehicle speed and a time elapsed after the generation of the slipping. When the detected vehicle speed V becomes equal to or less than the presumed vehicle speed VYS, it is determined that the gripping between the driven wheels and a road surface has been restored, and the prohibition of the upshifting is canceled. Thus, it is possible to properly perform the canceling of the prohibition of the upshifting.
REFERENCES:
patent: 5839083 (1998-11-01), Sugiyama
Hirano Masamitsu
Sato Yoichi
Honda Giken Kogyo Kabushiki Kaisha
Nguyen Tan
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