Motors: expansible chamber type – With motive fluid valve – Plural actuators for single valve means
Patent
1996-11-15
1998-08-11
Richter, Sheldon
Motors: expansible chamber type
With motive fluid valve
Plural actuators for single valve means
91461, F15B 1108
Patent
active
057912297
ABSTRACT:
A control device for a travelling system in construction vehicles is disclosed. The control device applies the pilot pressure of the pilot pump to the spool of the directional control valve separately from the travelling control pedal, thus automatically controlling operation of the directional control valve. However, the manual control mode performed by the travelling control pedals has priority over the automatic control mode. The control device has a proportional control valve, which applies the pilot pressure of the pilot pump to the spool in response to an input current signal. A pressure sensor checks the pilot pressures, which are generated by both the travelling control pedals and the proportional control valves and act on the spool. A controller receives a signal indicative of the pilot pressures checked by the pressure sensor and outputs the current signal to the proportional control valve.
REFERENCES:
patent: 3892079 (1975-07-01), Hirano et al.
patent: 4166506 (1979-09-01), Tezuka et al.
patent: 4518043 (1985-05-01), Anderson et al.
patent: 4559778 (1985-12-01), Krusche
patent: 5463931 (1995-11-01), Karlsson et al.
Lee Jin Han
Nam In Taek
Richter Sheldon
Samsung Heavy Industries Co. Ltd.
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