Exhaust gas purifying apparatus for internal combustion engine
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United States of America Patent
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Apr 22, 2008
Grant Date -
Oct 5, 2006
app pub date -
Mar 31, 2006
filing date -
Mar 31, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A main control computer commands a second sub-control computer to perform a reduced-cylinder operation when the coolant temperature detected by a coolant temperature sensor is greater than or equal to a reference temperature, and the exhaust temperature detected by a temperature sensor is less than a reference exhaust temperature and is within a reduced-cylinder operation allowable range in which a combination of the engine speed and the engine load is set in advance. The second sub-control computer deactivates a second cylinder group based on a command of the reduced-cylinder operation. The main control computer commands a first sub-control computer and the second sub-control computer to perform an all-cylinder operation when the coolant temperature detected by the coolant temperature sensor is less than the reference temperature, and the exhaust temperature detected by the temperature sensor is greater than or equal to the reference exhaust temperature or is out of the reduced-cylinder operation allowable range in which a combination of the engine speed and the engine load is set in advance.
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