| 摘要 |
PURPOSE:To prevent an engine stall from occurring by advancing ignition timing several times being set at time of normal trawling in the case where a sudden load change occurs due to load connecting or separating operation to be performed at time of low speed rotation. CONSTITUTION:When an engine is started in a neutral state, an ignition timing controller 30 first ignites at ignition timing I7 of starting timing advance for engine starting, and after the elapse of starting timing advance setting time, it shifts to some ignition timing to be determined by a timing switch 35A, among trawling ignition timings I1-I5. For example, when I1 is the case, throttle opening being detected by a sensor 33 is less than the specified value, and when shift operation is performed to forward or backward movement in this state, a neutral switch 51 is turned off, and trigger output is issued to each gate of thyristors SCR1-SCR4 at the ignition timing of I6 from a microcomputer 30 via a trigger output buffer 32, and at a moment shifted, the ignition timing is advanced from I1 to I6 several times more than at time of normal trawling. Thus, any engine stall is preventable. |
