Method for estimating an engine exhaust temperature and method for diagnosing a cylinder pressure sensor using an exhaust temperature estimate
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United States of America Patent
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Mar 9, 2010
Grant Date -
Dec 4, 2008
app pub date -
Sep 28, 2006
filing date -
Oct 7, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for estimating exhaust temperature on an output of an internal combustion engine cylinder, the cylinder including a crankshaft transforming into a rotation a translational movement of a piston mounted sliding in the cylinder, the piston closing a combustion chamber of the cylinder. The exhaust temperature is estimated based on the temperature inside the cylinder at a time of opening of the valve, the temperature inside the cylinder being itself estimated from an angle of rotation of the crankshaft, cylinder pressure, volume of air injected into the cylinder, and flow rate of recycled gases. A method diagnoses a cylinder pressure sensor based on an estimate of the exhaust temperature.
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