Carburetor electronic control system

A carburetor electronic control system (D) includes: transmission devices (24,25) coupled to valves for opening and closing an intake path (6) of a carburetor (C); electric motors (20,21) that make the valves open and close via the transmission devices (24,25); and an electronic control unit (12a) for controlling the operation of the electric motors (20,21). The interior of a casing joined to one side face of the carburetor is divided by a partition plate (16) into a transmission chamber (14) on the carburetor side and a drive chamber (15) on the opposite side. The transmission devices (24,25) and the electric motors (20,21) are housed and held in the transmission chamber (14) and the drive chamber (15), respectively. Therefore, the transmission devices (24,25), the electric actuators (20,21), and the electronic control unit (12a) can be housed in a common casing, thereby reducing the dimensions of the carburetor electronic control system (D).