Forward/reverse drive and stop control system for hydrostatic -m

Details Forward/reverse drive and stop control system for hydrostatic -m Forward/reverse drive and stop control system for hydrostatic -m

1995-02-21

1996-06-25

Marmor, Charles A.

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid pump and motor in one of plural paths to or from...

475 81, 477 68, F16H 4704

Patent

active

055295460

ABSTRACT:
A control system in which a judgment is made such that (i) a vehicle is in a forward drive control state, on condition that the forward/reverse drive lever is placed in the forward drive position and the actual speed ratio exceeds a specified small value in a forward drive direction, (ii) the vehicle is in a reverse drive control state on condition that the lever is placed in the reverse drive position and the actual speed ratio exceeds a specified small value in a reverse drive direction, (iii) the vehicle is in an engine brake control state, on condition that the lever is placed in the neutral position and the actual speed ratio exceeds the specified small value in the forward or reverse drive direction, (iv) the vehicle is in an FR shift control state, on condition that the lever is placed in the forward or reverse drive position and the actual speed ratio exceeds the specified small value in the reverse or forward drive direction, and (v) the vehicle is in a neutral control state, on condition that the lever is placed in the neutral position and the actual speed ratio does not exceed the specified small values in the forward and reverse drive directions.

REFERENCES:
patent: 4341131 (1982-07-01), Pollman
patent: 4382392 (1983-05-01), Meyerle et al.
patent: 4754664 (1988-07-01), Dick
patent: 4776233 (1988-10-01), Kita et al.
patent: 5193416 (1993-03-01), Kanayama
patent: 5406793 (1995-04-01), Maruyama et al.
patent: 5419128 (1995-05-01), Asano et al.

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