Method and apparatus for detecting engine firing in a hybrid powertrain system
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United States of America Patent
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Jul 3, 2012
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app pub date -
May 27, 2009
filing date -
May 27, 2009
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Abstract
A method for controlling a hybrid powertrain system includes commanding engine operation to transition from an engine-off state to an engine-on state. A control scheme detects engine firing based upon input speed, input torque and a change in the input torque.
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