| 摘要 |
PURPOSE:To continually hold good drivability, by providing a delay characteristic to a switching control of an ignition number and holding the time conformity always between a change of air-fuel ratio and the switching of the ignition number. CONSTITUTION:An automobile is driven to be accelerated by opening a throttle valve, and if an intake negative pressure approaches the atmospheric pressure, a control device, closing a vacuum switch 2 at a predetermined negative pressure or less, outputs a clamp control signal from a control unit 1 to a feedback control fuel supply unit 4. While a switching signal of two point one point ignition is also output, but here the control device, placing a vacuum switch 7 in an off-condition due to the delay action by a delay valve 5 and a surge tank 6, leaves a distributor 3 as it is in the two point ignition, and air-fuel ratio starts to change into a rich side. And after a predetermined delay time, the control device, turning on the switch 7 and inputting the switching signal of two point one point ignition to the distributor 3, transfers it to the one point ignition. In this way, the control device, preventing a transient condition from being generated in an engine in its acceleration or the like, can always hold good drivability.
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