Transmission braking and four-wheel locking for hydraulic hybrid transmission equipped vehicles
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United States of America Patent
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Jan 29, 2013
Grant Date -
Feb 18, 2010
app pub date -
Aug 11, 2009
filing date -
Aug 12, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A transmission braking system includes a vehicle drive train and at least one hydraulic motor. The hydraulic motor includes a front shaft and a rear shaft. The rear shaft has an anti-rotation element. An engagement mechanism is slidably affixed to the vehicle drive train, and selectively couples with the anti-rotation element to militate against a rotation of the front and rear shafts. A four-wheel locking system is also provided. The four wheel locking system includes a shaft-coupling engagement mechanism slidably affixed to one of the hydraulic motors. The shaft-coupling engagement mechanism selectively couples with the anti-rotation elements of the motors for allowing a summing of the output torque. The transmission braking system and the four-wheel locking system may be provided in a combined system.
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