Methods and systems for engine-off disengagement of a vehicle park state
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United States of America Patent
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Nov 19, 2019
Grant Date -
May 3, 2018
app pub date -
Oct 26, 2017
filing date -
Oct 31, 2016
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Abstract
Methods and systems are provided for launching a vehicle in an electric-only mode of operation. In one example, a driveline operating method comprises engaging a parking pawl to an output shaft of a dual clutch transmission in response to a request to engine a vehicle into a parked state, and disengaging the parking pawl via rotating an engine via an integrated starter/generator in response to a request to propel the vehicle solely via power of an electric machine positioned downstream of the dual clutch transmission. In this way, the vehicle may be launched in the electric-only mode without activating the engine in a fueled mode of operation and then deactivating the engine, which may increase vehicle operator satisfaction and which may improve fuel economy.
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