Pressure detection mechanism for exhaust emission control device of internal combustion engine
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United States of America Patent
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Oct 7, 2008
Grant Date -
Jul 14, 2005
app pub date -
Sep 13, 2004
filing date -
Sep 12, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pressure detection mechanism for a catalyst of an engine, in which the catalyst includes an upstream NSR catalyst and a downstream DPNR catalyst stored in a catalyst casing, which includes a DPNR front pressure detection pipe connected to a space formed by the NSR catalyst, the DPNR catalyst and the catalyst casing, a DPNR rear pressure detection pipe downstream of the DPNR catalyst connected to a space formed by the DPNR catalyst and the catalyst casing, and a pressure difference transducer connected to the DPNR front pressure detection pipe and the DPNR rear pressure detection pipe.
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