| 摘要 |
PURPOSE:To keep the idling operation of an internal-combustion engine stable, by providing a control means which changes the ignition timing for idling operation to that of the output operation and the air-fuel ratio for the idling operation to that of the output operation when it detects that the engine load is increased through the operation of auxiliaries during the idling operation of the engine. CONSTITUTION:When the load is imposed to an engine due to operation of auxiliaries during idling operation of the engine, a load switch 18 is turned ON. Then, the current is supplied to a solenoid 16 and a valve element 14 is moved to close the valve, so that supply of air from an air bleed 9 is interrupted. Therefore, fuel in a passage 6 is mixed only with the air supplied from another air bleed 8, and air-fuel mixture is enriched resultantly. Further, when the current is supplied also to a solenoid 26 with closing of the switch 18, a VC port 20 is closed, so that only the suction vacuum taken out from a port 21 is introduced into a vacuum chamber 24 of a vacuum-operated ignition timing advancing means 23 of a distributor. Resultantly, a diaphragm 29 is pulled to the left against the force of springs 30, 31 so that the advance angle of the ignition timing is increased from x degree to y degree (x<y). |
