Hybrid powertrain assembly including engine with variable valve lift
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United States of America Patent
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Feb 11, 2014
Grant Date -
Sep 12, 2013
app pub date -
Mar 12, 2012
filing date -
Mar 12, 2012
priority date (Note) -
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Abstract
A powertrain assembly includes a hybrid propulsion system and an internal combustion engine. The hybrid propulsion system includes an electric motor at least partially powering propulsion of a vehicle during a first operating mode and an internal combustion engine at least partially powering propulsion of the vehicle during a second operating mode. The internal combustion engine includes an engine structure defining a combustion chamber and an intake port, an intake valve located in the intake port, and an intake valve lift mechanism supported on the engine structure and engaged with the intake valve. The intake valve lift mechanism is operable in a first lift mode and a second lift mode. The intake valve lift mechanism provides a first intake valve opening profile during the first lift mode and a second intake valve opening profile different than the first intake valve opening profile during the second lift mode.
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