| 摘要 |
PURPOSE:To aim at a distinct improvement in fuel consumption in time of deceleration as well as to control a shock in time of quick acceleration, by keepping the ignition timing at the lag timing control side in time of deceleration when engine speed goes beyond the specified value, while composing the ignition timing so as to cut fuel in a slow system. CONSTITUTION:In time of running when engine speed goes beyond the specific value (about 1,600r.p.m.) as well as in time of deceleration when a throttle valve 4 is almost fully closed, a speed detector switch 11 is turned off while a vacuum switch 13 is on whereby a relay 10 is energized with a continuous rating current and its suction pressure contact 102 is closed. Accordingly, a fuel control valve 7 is closed and a slow fuel passage 5 is cut off, and simultaneously a distributor (unillustrated herein) is adjusted to the lag timing control side by dint of high suction pressure to be added to a first diaphragm of a vacuum control device 3 and via a rod 24. Afterward when the throttle valve 4 is quickly opened, a second diaphragm 18 shifts to the timing control side at a specified time lag by the action of a throttle 23 provided inside an air passage 22 so that any possible shock in time of quick acceleration is eventually controlled to be checked. |
