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...
Patent
1997-02-28
1999-04-06
Ta, Khoi Q.
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 80, 475 81, F16H 4702, F16H 5700, B60K 1704
Patent
active
058909826
ABSTRACT:
A hydrostatic/mechanical branch power split transmission for power vehicles is disclosed. The transmission includes an infinitely variable hydrostatic converter having a first hydrostatic unit of adjustable volume and a second hydrostatic unit. The transmission also includes a power distribution system whereby the driving power is split into a hydraulic and a mechanical branch and is summed again before the transmission output. The transmission permits various driving strategies or driving programs which can be conveniently adjusted and accessed. There is also a hydrostatic connection which can be switched at several gear racial points. The breaking capacity of the engine and the maximum breaking effect through continuous hydrostatic converter can be utilized and easily controlled. A further variant also enables breaking energy to be recuperated with the hydrostatic converter. The continuous converter can be precisely adjusted to optimize gear shift range selection.
REFERENCES:
patent: 5207736 (1993-05-01), Fredriksen
patent: 5337629 (1994-08-01), Kita
patent: 5496223 (1996-03-01), Jarchow
patent: 5624339 (1997-04-01), Coutant et al.
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