Title:
METHOD AND UNIT FOR CONTROLLING VEHICLE FOR LOADING OPERATION
Document Type and Number:
WIPO Patent Application WO/1992/001869
Kind Code:
A1
Abstract:
A method and a unit for controlling a vehicle for loading operation which carries a variable capacity hydraulic pump (PV) for operating a loading machine and a torque converter (T) for driving itself. The control unit comprises an engine (E) provided with an electronically controlled governor (10) capable of selecting output characteristics stepwise; means (12), (14), (42) and (43) for setting stepwise the maximum capacity and output torque of the variable-capacity hydraulic pump (PV) for operating the loading machine; means (44), (45) for detecting a pump capacity and hydraulic pressure; switches (42), (43) for selecting output characteristics of the engine; a governor controller (11) for controlling to the output characteristics selected by the selecting switches; and a pump controller (41) for selectively setting the maximum capacity and output torque characteristics of the variable-capacity hydraulic pump (PV) in accordance with the engine output characteristics selected by the selecting switches. Accordingly, even if the hydraulic torque fluctuates at the time of high pressure in the variable-capacity hydraulic pump, the fluctuating range of absorption torque of the torque converter can be controlled, thereby enabling to perform earth-sand scoop-up working with ease and efficiently.
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Inventors:
IKARI MASANORI (JP)
Application Number:
PCT/JP1991/000948
Publication Date:
February 06, 1992
Filing Date:
July 16, 1991
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
KOMATSU MEC CORP (JP)
KOMATSU MEC CORP (JP)
International Classes:
E02F9/20; E02F3/43; E02F9/22; F02D29/04; (IPC1-7): E02F9/20; F02D29/04; F04B49/00; F15B11/00
Foreign References:
| JPS63154874A | 1988-06-28 | |||
| JPS63167042A | 1988-07-11 | |||
| JPS63186978A | 1988-08-02 |
Other References:
See also references of EP 0539589A4
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