Supercharging control for an internal combustion engine
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United States of America Patent
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app pub date -
Oct 31, 2007
filing date -
May 4, 2005
priority date (Note) -
Abandoned
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Abstract
By means of a pre-swirl device, in steady-state engine operation, the rotational speed lines of the compressor are moved, by increasing the swirl at the compressor inlet in the rotational direction of the compressor, to such an extent that the steady-state operating point of the compressor comes to rest approximately at the absorption limit of the compressor. In this way, the level of the charge pressure can be adjusted in a controlled fashion to the value required for the respective engine operating point. In the event of a sudden increase in the engine load, it is possible by resetting the pre-swirl grate to generate a charge pressure increase without a time-consuming rotor acceleration. The pre-swirl device therefore simultaneously assumes the functions of charge pressure and engine load control.
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