Temperature estimating apparatus for internal combustion engine
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United States of America Patent
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-
Jul 6, 2004
Grant Date -
Mar 27, 2003
app pub date -
Sep 4, 2002
filing date -
Sep 5, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A temperature estimating apparatus for an internal combustion engine is provided for correctly calculating the temperature of an exhaust device even when the internal combustion engine is started under low temperature conditions. The temperature estimating apparatus comprises an ECU for estimating the temperature of a hydrocarbon adsorbent in an exhaust system of the internal combustion engine through calculations. The ECU calculates an estimated adsorbent temperature of the adsorbent in accordance with an engine rotational speed, an absolute intake pipe inner pressure, an engine water temperature, an intake temperature, and a detected humidity of exhaust gases. This calculation is started when condensation, which has occurred within an intake pipe, is eliminated.
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