Automatic transmission control system for vehicle

Details Automatic transmission control system for vehicle Automatic transmission control system for vehicle

1991-03-07

1992-10-27

Lorence, Richard

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

74844, 74859, 3644241, B60K 4106

Patent

active

051579910

ABSTRACT:
A control system for an automatic transmission for a vehicle includes a vehicle speed sensor, a throttle opening sensor, and a controller. The controller causes the automatic transmission to upshift on the basis of a first upshift line when the temperature of transmission oil is not lower than a predetermined value and on the basis of a second upshift line when the temperature of transmission oil is lower than the predetermined value. The first upshift line is set so that the automatic transmission is caused to upshift substantially irrespective of the throttle opening when the vehicle speed exceeds a first predetermined speed in a kick-down range and the second upshift line being set so that the automatic transmission is caused to upshift substantially irrespective of the throttle opening when the vehicle speed exceeds a second predetermined speed in said kick-down range. The second predetermined speed is lower than the first predetermined speed.

REFERENCES:
patent: 4572029 (1986-02-01), Kinugasa et al.
patent: 4733581 (1988-03-01), Hasegawa et al.
patent: 4996893 (1991-03-01), Nakamura et al.
patent: 5016495 (1991-05-01), Takizawa
patent: 5035157 (1991-07-01), Aoki et al.

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