Line pressure control device for automatic transmission

Details Line pressure control device for automatic transmission Line pressure control device for automatic transmission

1999-07-16

2000-09-19

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477 50, F16H 6126

Patent

active

061204137

ABSTRACT:
A controller (61) for a line pressure control device of a transmission (200) determines whether or not a vehicle speed is above a fixed vehicle speed. The controller (61) set a target line pressure in response to a torque input into said transmission (200) when the vehicle speed is lower than the fixed vehicle speed. When the vehicle speed is higher than the fixed vehicle speed, the target line pressure is increased to a fixed hugh line pressure irrespective of the torque input into the transmission (200). In this way, it is possible to prevent deficiencies in an amount of lubricant when the vehicle is running at a high speed.

REFERENCES:
patent: 5107725 (1992-04-01), Takahashi
patent: 5749804 (1998-05-01), Toukkura
patent: 5759134 (1998-06-01), Kuriyama
patent: 5906556 (1999-05-01), Harada et al.

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