Apparatus, system, and method for preventing overspeed of a turbocharger
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United States of America Patent
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Jul 12, 2011
Grant Date -
Jul 2, 2009
app pub date -
Dec 31, 2007
filing date -
Dec 31, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
An apparatus, system, and method are disclosed for preventing overspeed of a turbocharger. The apparatus includes a two-stage turbocharger system with a high pressure and a low pressure turbocharger. A bypass valve that divides an exhaust flow into a primary exhaust flow and a bypass flow. A relief valve vents a portion of the primary exhaust flow around the high pressure turbocharger. The low pressure turbocharger receives the bypass flow, the primary exhaust flow, and the vented portion of the primary exhaust flow. The apparatus includes a controller having a protection condition module that determines a protection indicator, and a relief valve control module that controls the relief valve according to the protection indicator.
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