Exhaust gas recirculation device and control method thereof
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United States of America Patent
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-
Aug 20, 2002
Grant Date -
N/A
app pub date -
Jun 14, 2000
filing date -
Jun 16, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A Roots blower driven by a direct-current motor provided to a recirculation duct for connecting an exhaust duct and an intake duct to extract a part of exhaust gas of a diesel engine to recirculate to an intake side. Accordingly, even when a differential pressure between an exhaust side and the intake side, or even when a pressure on the intake side is higher than the exhaust side fluctuates, the exhaust gas flowing to the recirculation duct can be forcibly pumped by the Roots blower while appropriately controlling flow rate thereof, so that an optimum recirculation amount of exhaust gas in accordance with operation condition of the diesel engine can be recirculated to the intake side.
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