Use of a clutch proportional-integral controller to assist a state observer during a vehicle shift event
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United States of America Patent
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Apr 15, 2014
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N/A
app pub date -
Mar 3, 2011
filing date -
Sep 14, 2010
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Abstract
A method for optimizing a shift event in a vehicle includes designating a clutch to be used as an oncoming clutch or an offgoing clutch in the shift event before executing the shift event, and processing a plurality of input values through a state observer to thereby determine, as an output value of the state observer, an estimated slip speed of the designated clutch. The method includes using a proportional-integral control module for the designated clutch (a clutch PI) to close the control loop on the estimated slip speed from the state observer, thereby smoothing a switching between state space equations in the state observer, and executing the shift event. A vehicle includes a transmission, an engine, at least one traction motor, and a control system configured for executing the above method.
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