Hydraulic control for a multi-ratio transmission

Details Hydraulic control for a multi-ratio transmission Hydraulic control for a multi-ratio transmission

1996-08-19

1998-04-14

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477156, 475127, F16H 6126

Patent

active

057386080

ABSTRACT:
A power transmission control selectively establishes five forward speeds and one reverse speed by the controlling of three relay valves and two variable pressure TRIM valves. The TRIM valves normally control the pressure in the on-coming and off-going friction devices, respectively. The TRIM valves switch functions between ranges. In the fifth speed, the relay valves provide a pathway or passage for directing the fluid output of one of the TRIM valves to a control area on a system regulator valve to effect a variable main pressure.

REFERENCES:
patent: 3688607 (1972-09-01), Marlow
patent: 4432255 (1984-02-01), Borman et al.
patent: 5399130 (1995-03-01), Long
patent: 5409421 (1995-04-01), Sakai et al.
patent: 5496231 (1996-03-01), Eaton
patent: 5509868 (1996-04-01), Eaton
patent: 5647820 (1997-07-01), Matsumoto et al.

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