| 摘要 |
PURPOSE:To make sensors unnecessary and make the artificial stop of speed limitting function impossible by setting limit revolving numbers at every gear positions. CONSTITUTION:A revolution detecting unit 41 outputs a voltage Vp proportional to the revolving number of the engine by a signal from a generating coil 3b. The voltage V applied to a thyristor SCR1 for misfire is V=Vp-Vz and a gate current (i) becomes i=V/R. Here, Vz is the breakdown voltage of a Zener diode ZD and R is the resultant resistance of R1, R2 or R3 and resistors r3, r7, which is selected by a gear position switch 5. Accordingly, a timing to conduct the thyristor SCR1 for misfire can be determined by the position of the switch 5 so as to cooperate with the revolving number of the engine. According to this method, the artificial stop of the speed limitting function effected by removing a part, such as the sensor or the like, becomes impossible. |
