Diesel engine exhaust purifying device
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United States of America Patent
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-
Nov 30, 2004
Grant Date -
Sep 18, 2003
app pub date -
Jan 23, 2003
filing date -
May 24, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A device for purifying exhaust gas of a diesel engine equipped with a continuous regeneration type diesel particulate filter arranged in the exhaust gas passage of the engine. The device includes an intake air shutter arranged in the intake air passage of the engine, an exhaust gas temperature region detector for detecting an exhaust gas temperature region of the engine, a controller for controlling the opening degree of the intake air shutter when the exhaust gas temperature region of the engine, detected by the exhaust gas temperature region detector, is lower than a predetermined temperature region, and an exhaust valve-operating mechanism equipped with an exhaust gas introduction mechanism for opening the exhaust valve of the engine for a short period of time during the intake stroke of a cylinder of the diesel engine, to introduce exhaust gas into the cylinder.
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