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- W1520267030 abstract "Varying the timing of intake-valve closing was examined on a single-cylinder engine as a means for controlling the load of a homogeneous-charge spark-ignition engine. The engine was operated unthrottled, with load control obtained by holding the intake valve open during a portion of the compression stroke. This allowed the piston to push part of the cylinder charge back into the intake manifold. Comparisons to a conventional engine showed the late intake-valve-closing engine to have (1) lower pumping losses, (2) lower specific fuel consumption, (3) lower nitric oxide emissions, and (4) similar HC emissions. However, the fuel-economy benefit offered by this load-control concept would be reduced by the frictional losses of a control mechanism. The current trend toward lower vehicular power/weight ratios also would diminish the impetus for this approach." @default.
- W1520267030 created "2016-06-24" @default.
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- W1520267030 date "1980-06-01" @default.
- W1520267030 modified "2023-09-28" @default.
- W1520267030 title "Controlling Engine Load by Means of Late Intake-Valve Closing" @default.
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- W1520267030 doi "https://doi.org/10.4271/800794" @default.
- W1520267030 hasPublicationYear "1980" @default.
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