Turbocharger for an internal combustion engine
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United States of America Patent
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Issued Date -
Dec 10, 2009
app pub date -
Apr 20, 2006
filing date -
Apr 23, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A turbocharger for an internal combustion engine comprising: a turbine driven by exhaust gas from the engine; a compressor for supplying compressed air to the engine, the compressor including an impeller driven by the turbine; an arrangement upstream of the impeller suitable for directing air such that it is swirling in a rotational sense on reaching the impeller; and control means arranged to control said arrangement such that as the speed of the impeller approaches a predetermined maximum speed limit the arrangement directs air such that it is swirling in the opposite rotational sense to that in which the impeller is being driven by the turbine.
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