Automatic transmission system for automotive vehicle

Details Automatic transmission system for automotive vehicle Automatic transmission system for automotive vehicle

1995-05-04

1997-06-10

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

477143, 477160, F16H 6126

Patent

active

056370563

ABSTRACT:
An automatic transmission system for automotive vehicle includes a hydraulic pump for pressurizing fluid, a pressure regulating valve for varying hydraulic pressure supplied from the hydraulic pump, nine friction elements activated by drive pressure or reverse pressure supplied from a manual valve, first and second shift control sections having at least two shift valves for supplying hydraulic pressure to the friction elements, selectively, and a torque pressure converting section for supplying torque pressure to the first shift control section. The system performs five forward speeds and one reverse speed. Two solenoid valves are adopted to control four shift valves and control is performed sequentially such that the construction of the system can be simplified and the shift feeling can be improved.

REFERENCES:
patent: 4369677 (1983-01-01), Lewis
patent: 4745826 (1988-05-01), Nishikawa et al.
patent: 4787272 (1988-11-01), Taga et al.
patent: 5086672 (1992-02-01), Kato et al.
patent: 5507706 (1996-04-01), Jang et al.

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