Engine speed control for a low power hydromechanical transmission
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United States of America Patent
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Dec 28, 2010
Grant Date -
Jun 12, 2008
app pub date -
Dec 8, 2006
filing date -
Dec 8, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of operating a transmission of a vehicle. The method includes determining an open loop ratio percentage from an engine RPM input signal and a brake input signal using a first algorithm. Determining a closed loop ratio percentage from the engine RPM input signal, a vehicle RPM input signal and a throttle input signal using a second algorithm. Summing the open loop percentage and closed loop ratio percentage to calculate a ratio command percentage that is used to sum with a swashplate input to actuate a swashplate positioner and operate the transmission.
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