Combined mode hydrostatic transmission

Details Combined mode hydrostatic transmission Combined mode hydrostatic transmission

1997-09-15

1999-05-18

Nguyen, Hoang

Power plants

Pressure fluid source and motor

Having a mechanical clutch or brake device in the power train

60487, F16D31/02

Patent

active

059040432

ABSTRACT:
A combined mode hydrostatic transmission comprises a differential hydraulic motor and a variable capacity hydraulic pump for supplying this motor with pressurized oil. The differential hydraulic motor comprises a swash plate connected to an output shaft and a cylinder block joined to an input shaft. Further provided are a brake which selectively brakes the rotation of the cylinder block and a clutch which selectively interrupts the input rotation to the cylinder block. When the brake is operated and fluid is supplied from the variable capacity hydraulic pump with the clutch disengaged, the differential hydraulic motor functions in a HST mode. When the brake is released, the clutch is connected and fluid is supplied from the variable capacity hydraulic pump, the differential hydraulic motor functions in a HMT mode.

REFERENCES:
patent: 2996135 (1961-08-01), Grabow
patent: 4037409 (1977-07-01), Leibach
patent: 5367877 (1994-11-01), Irikura
patent: 5497622 (1996-03-01), Nam
patent: 5701738 (1997-12-01), Eberle et al.

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