| 摘要 |
PURPOSE:To supply an optimum mixture in every engine operating condition, by controlling the air-fuel ratio and amount of the mixture of an engine with the use of a step motor for controlling the amount of air bypassing a throttle valve in a carburetor and a plurality of solenoid valves arranged in parallel with each other for controlling fuel fed to a bypass passage. CONSTITUTION:Fuel is fed through a passage 11 opened to an auxiliary passage bypassing throttle valve 3 in a carburetor 1, downstream of a valve 8 which is operated by a pulse motor 10 driven by a signal from a control device 6 and which is disposed in the auxiliary passage 5. This fuel is controlled by two solenoid valves 9a, 9b which are arrange in parallel with each other and which open and close two fuel inlet ports 12a, 12b arranged in parallel with each other, in accordance with the output of the control device 26. Accordingly, the control device 26 controls the feed amounts of auxiliary air and fuel in accordance with the operating condition of the engine so that the amount and air-fuel ratio of the mixture which is fed into the engine may be arbitrarily controlled. |
