| 摘要 |
PURPOSE:To accomplish optimal control on the engine operation with ease by use of an electric control circuit to which an output signal of a single temperature sensor is afforded as an input signal, in the manner that a choke valve and the idling speed of an engine are interrelated with each other. CONSTITUTION:A carburetor 1 comprises a choke valve 4 opened through deformation of a bimetal 3 that is caused by the heating of a heater 2 and a throttle valve 5 that is opened according to the depth of depression of an accelerator pedal. Further, the carburetor 1 comprises a throttle actuator 8 with an idling speed sensor 7 which controls the valve opening position of the throttle valve 5 at a desired position where the throttle valve 5 is not complately closed, according to the idling speed of an engine. In an electric control circuit 18, output signals of an engine-speed sensor 14 and an engine-temperature sensor 15 are furnished to a central processing unit CPU. Current supplied to the throttle actuator 8 and a heater 2 is controlled by the output signal of the central processing unit CPU. |
