Dual path hydromechanical powertrain

Details Dual path hydromechanical powertrain Dual path hydromechanical powertrain

2011-08-09

2011-08-09

Lewis, Tisha D (Department: 3655)

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Pump and motor in series with planetary gearing

C475S072000, C475S074000, C180S367000, C180S369000

Reexamination Certificate

active

07993230

ABSTRACT:
A hydromechanical powertrain for a ground vehicle. The powertrain, more specifically a transmission, includes an input shaft that is coupled to a rotational power source and an output shaft that is coupled to a load. A first hydrostatic unit coupled to a first gear, while a second hydrostatic unit is selectively coupled to one of a pair of clutches. The first of the clutches has a first clutch gear that is selectably coupled to a first mode gear, which is in turn rotationally fixed to the output shaft. The second of clutches has a second clutch gear that is selectively coupled to a second mode gear, which is in turn rotationally fixed to the input shaft. Also coupled to the input shaft is a planetary gear set.

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European Search Report, 4 Pages, Jul. 29, 2009.

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