METHODS AND SYSTEMS FOR STARTING AN ENGINE
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United States of America Patent
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app pub date -
Jul 11, 2017
filing date -
Aug 18, 2014
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Abstract
Methods and systems are provided for improving engine restart operations occurring during a transmission shift in a hybrid vehicle. Engine speed is controller during cranking and run-up to approach a transmission input shaft speed that is based on the future gear of the transmission shift. Engine speed is controlled via adjustments to spark, throttle, and/or fuel, to expedite engine speed reaching the synchronous speed.
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