| 摘要 |
An apparatus for distributing a high voltage arc from the high voltage ignition coil of a piston type internal combustion engine to the respective spark plug terminals by means of a high resistance, field-interrupting dielectric device which has an aperture therethrough defining a conductive path through the non-conductive dielectric device. The device is rotated in a fixed gap between the fixed location high voltage ignition coil electrode and the opposing spark plug terminal electrodes in such a manner so as to cause the aperture therethrough to pass directly between the electrodes which in turn allows a high voltage arc to bridge the fixed gap between the electrodes thus causing the spark plugs to be fired. When the aperture is not present in the fixed gap between the electrodes, the high resistance dielectric material of the device interrupts the electrical field between the electrodes, thus preventing an arc from bridging the gap and the spark plugs from being fired. The rotation of the device in the gap is synchronized to the rotation of the engine camshaft by means of a step motor, motor controller, sensors, and electronic circuitry, to insure that the aperture is present and the spark is allowed to bridge the gap to the respective spark plug terminals and cause the respective spark plugs to be fired in the proper sequential manner, without any mechanical linkage between the engine camshaft and the rotating distribution device.
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