| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine for promoting the stabilization of combustion while accurately suppressing the exhaustion of unburnt gas at starting the internal combustion engine in the cold condition. <P>SOLUTION: The exhaust emission control device comprises a secondary air supply device 25 for jetting secondary air toward the opening of an exhaust port 7 to be opened/closed by an exhaust valve 3 of the internal combustion engine, valve control means 33, 34 for variably controlling a valve opening/closing timing for at least one of a suction valve 4 and an exhaust valve 5 or a valve lifting amount, a water temperature sensor 45 (an operation information detecting means) for detecting operation information for the internal combustion engine, and a controller (a control means) 9 for driving the secondary air supply device 24 and operating the valve control means when determining that the internal combustion engine is at a cold condition determined temperature Tc1 or lower, to increase an overlap amount B1 between the suction valve and the exhaust valve larger than that in steady state operation. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
