Device for exhaust gas recirculation into the air intake region of motor vehicle internal combustion engines
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United States of America Patent
Stats
-
Sep 23, 2003
Grant Date -
Jun 5, 2003
app pub date -
Dec 17, 2002
filing date -
Dec 10, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For reduction of toxic components in exhaust gases of internal combustion engines, particularly of nitrogen oxides in motor vehicles, a portion of the exhaust gases, essentially operating as inert gases, are recirculated into the combustion chamber of the engine for the purpose of reducing the peak combustion temperature. In the air intake region the engine is fed an adjustable mixture of partially recirculated exhaust gas and air, wherein the mass of in-flowing air and the mass of exhaust gas recirculated from the engine following its cleaning and cooling are fed respectively to its own flow rate sensor. From the determined mass flow amounts of in-flowing air and recirculated exhaust gas, an actual value signal is formed and compared with a target value signal dependent upon the respective performance specification. A regulation deviation of the actual value signal leads to an adjustment signal, which intervenes into the exhaust gas recirculation for the purpose of adjusting the amount recirculated.
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