| 摘要 |
To prevent operation of the engine in reverse direction of rotation, an auxiliary winding on the magneto is connected with the pulse source which provides ignition trigger pulses by an unsymmetrical conduction network, including diodes, which prevent application of trigger pulses from the pulse source to a control switch connecting an energy storage capacitor to discharge through the ignition coil, thus providing an ignition pulse, unless both the pulse source and the auxiliary winding provide, simultaneously, instantaneous output voltages of a predetermined polarity which is in direction to trigger the pulse source. Preferably, the auxiliary winding is formed as a tapped portion of the main magneto winding. |
