APPARATUS, SYSTEM, AND METHOD FOR UTILIZING A DIESEL AFTERTREATMENT DEVICE BETWEEN THE HIGH PRESSURE AND LOW PRESSURE TURBINE STAGES OF A TWO-STAGE TURBOCHARGING SYSTEM
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United States of America Patent
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Issued Date -
Jul 16, 2009
app pub date -
Jan 14, 2008
filing date -
Jan 14, 2008
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Abandoned
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Abstract
An apparatus, system, and method are disclosed for utilizing a diesel aftertreatment device between the high pressure and low pressure turbine stages of a two-stage turbocharging system. A diesel aftertreatment device is connected in series between the high pressure turbine and the low pressure turbine such that the diesel aftertreatment device receives inflow from the high pressure turbine and provides outflow to the low pressure turbine. A bypass mechanism is provided such that at low engine speeds or loads, engine exhaust flows through the high pressure turbine as well as the diesel aftertreatment device, but at high engine speeds or loads, the high pressure turbine and diesel aftertreatment device are bypassed, thereby allowing the engine to operate more efficiently while still effectively removing pollutants from the engine exhaust.
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