TWO-PATH HYDROMECHANICAL TRANSMISSION AND CONTROL METHOD THEREFOR

Title:

TWO-PATH HYDROMECHANICAL TRANSMISSION AND CONTROL METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/1990/012225

Kind Code:

A1

Abstract:

This invention relates to a two-path hydromechanical transmission mounted on the caterpillar vehicle or the like and to a method of controlling the same, in which excellent operability and straight advancement performance can be obtained in a low speed zone and a high efficiency of power transmission is possible even in a high speed zone, using a small-capacity hydraulic pump and hydraulic motor. For attaining the above effects, the transmission is composed of: hydraulic pumps (2), (3) disposed independent from each other on the right and left sides and driven by an engine and hydraulic motors (4), (5) disposed in the same way as above; a power transmission path provided with reduction gear trains (100), (159) for transmitting output torque from the motors to the driving wheels and planetary reduction gear trains (200), (250); and another power transmission path provided with a reduction device (300) including bevel gears for dividing output torque from the engine rightward and leftward and with the abovesaid planetary reduction gear trains (200), (250) for transmitting output torque to the driving wheels on the right and left sides. This apparatus is separately controlled for running in the low and high speed zones.

Inventors:

SATO MASAYUKI (JP)

Application Number:

PCT/JP1990/000333

Publication Date:

October 18, 1990

Filing Date:

March 14, 1990

Export Citation:

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Assignee:

KOMATSU MFG CO LTD (JP)

International Classes:

B62D11/18; F16H47/04; F16H61/456; (IPC1-7): F16H47/02; F16H47/04; F16H61/44

Foreign References:

JPS5510174A

1980-01-24

Other References: