Fluid pressure circuit

Details Fluid pressure circuit Fluid pressure circuit

1992-01-24

1993-08-31

Lorence, Richard M.

192 clutches and power-stop control

Clutches

Operators

192109F, 60415, F16D 2510, F16D 2514

Patent

active

052400964

ABSTRACT:
A fluid pressure circuit for an automatic transmission allows a single accumulator to selectively provide a plurality of pressure adjustment characteristics. The fluid pressure circuit includes a directional control valve responsive to a value of a reverse clutch pressure P.sub.R relative to a threshold pressure P.sub.CH, to connect either of a high-clutch pressure P.sub.H or the reverse clutch pressure P.sub.R with the accumulator such that the pressure adjustment characteristics for each are respectively different for eliminating a shifting time lag in the automatic transmission.

REFERENCES:
patent: 2929478 (1960-03-01), Tuck et al.
patent: 3309939 (1967-03-01), Pierce, Jr.
patent: 3501979 (1970-03-01), Forster et al.
patent: 4138846 (1979-02-01), Sakakibara
patent: 4161895 (1979-07-01), Ushijima et al.
patent: 4219109 (1980-08-01), Ushijima et al.
"Nissan Automatic Transmission Service Manual RE5R01A", published in 1989, pp. A-53, A-55, and A-75.

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