Engine assembly with variable valve displacement on one cylinder bank and method of controlling same
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United States of America Patent
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Aug 18, 2015
Grant Date -
Apr 24, 2014
app pub date -
Oct 18, 2012
filing date -
Oct 18, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
An engine assembly includes an engine block having a first bank of cylinders and a second bank of cylinders. A crankshaft is supported by the engine block and is configured to be driven by torque due to combustion energy in the first and second banks of cylinders. A first set of valves is operable to control air flow into and out of the first bank of cylinders. Camshafts driven by the crankshaft are operatively connected to the first set of valves to control opening and closing of the first set of valves. A second set of valves is operable to control air flow into and out of the second bank of cylinders. A controller is operatively connected to the second set of valves and is configured to vary at least one of lift, duration, and timing of the second set of valves based on commanded torque at the crankshaft.
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