| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an exhaust emission control device for an internal combustion engine to high-efficiently purify exhaust gas as a power is saved. SOLUTION: An exhaust emission control device for an internal combustion engine is provided with a plasma discharge device 3, a high voltage generating device 6, and a control means 71. The control means 71 monitors a fluctuation of the detecting output of an exhaust gas sensor 4 in a combustion cycle equivalent time of an internal combustion engine 1 and a control signal is outputted to the high voltage generating device 6 in a manner to match with a fluctuation of the detecting output and a feed power to the plasma discharge device 3 is controlled. In this case, an amount of a noxious component in exhaust gas discharged from the internal combustion engine 1 is changed in a pulsating manner, whereby a control means 71 controls according to the change such that when an amount of a noxious component is high, a feed power is increased and when the amount is low, the feed power is decreased.</p> |
