| 摘要 |
PURPOSE:To maintain the maximum output continuously by controlling an ignition timing in accordance with an engine rotation and the temperature of gas in an exhaust pipe, while furthermore controlling the ignition timing in accordance with the intake negative pressure such that the ignition timing is lagged as the intake negative pressure increases. CONSTITUTION:When an ignition plug 4 of two cycle engine 1 for motor cycle is controlled by a control section 16 through an ignition coil 18, it is controlled such that the ignition timing is led more as the engine rotation detected through a rotation sensor 12 increases. The ignition timing is corrected by the temperature of gas in an exhaust pipe detected through a temperature sensor 11. When the exhaust pipe is cooled during travel under rainy weather, for example, to cause the temperature drop of the gas in the exhaust pipe, the ignition timing ins lagged in the direction of the top dead center. Furthermore, the ignition timing is controlled in accordance with the intake negative pressure detected through an intake negative pressure sensor 19 such that it is led as the intake negative pressure decreases while lagged as the intake negative pressure increases.
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