| 摘要 |
PURPOSE:To reduce production of vibration of an engine, by a method wherein a rotor head is provided with a stationary electrode, a moving electrode, and a relay electrode for limiting movement of the moving electrode, during a work of preventing the occurrence of overrotation, ignition is effected only by a given cylinder, and during ignition of other cylinders, a given cylinder is caused to perform pilot flame ignition. CONSTITUTION:A rotor head 1 rotated in linkage with an engine is provided with a stationary electrode 2 positioned facing an electrode 8 on the cap side, and a moving electrode 3 movable in centrifugal direction against a spring 5. A high voltage guided to o central terminal 11 on the cap 10 side causes the feed of discharge spark to a relay electrode 4 through the rotor head 1. A relay electrode 4 limiting movement of the moving electrode 3 is protruded from the upper surface of the rotor head 1, and an electrode 9, having the one end part approaching the relay electrode 4 during rotation of the relay electrode 4 and the other end part approaching a part of the electrode 8, is secured to a cover 7. During a work of preventing the occurrence of overrotation, only a given cylinder is caused to effect regular ignition, and during ignition of other cylinder, a given cylinder is caused to perform pilot flame ignition.
|
