| 摘要 |
<p>The present invention relates to a method for igniting the air-fuel mixture in an internal combustion engine, wherein said method involves increasing the force of the electric field in the electrode gap of the spark plug until the electric breakdown thereof. The method further involves repeating several times the following steps: decreasing step by step the force of the electric field down to a given level; maintaining the force at this level for a duration of 2.5 to 25 microseconds; reversing the orientation of the electric field; and increasing the force of the electric field in the electrode gap of the spark plug until the electric breakdown thereof. This invention also relates to an ignition system that uses piezoelectric elements for realising this method. This invention provides for an essentially complete fuel combustion and improves the economical and ecological characteristics of the engine.</p> |
