| 摘要 |
PURPOSE:To prevent overheating of an electronic control unit effectively and to simplify the arrangement for wiring and piping, by disposing the electronic control unit in the engine room and employing such an arrangement as to circulate fuel from fuel tank around the outer surface of said electronic control unit. CONSTITUTION:Electronic control unit 20 calculates signals afforded from a plurality of detectors 21 and gives the outputs to solenoid valves 6, 9, 13, fuel pump 18, distributor 26 and selector valve 22. This unit 20 is fixed at one side of float chamber of carburetor 1, and fuel supplied from fuel pump 18 is introduced from fuel inlet port 23, passed along the outer surface of unit 20, and then discharged from outlet port 24. Overheating of the unit 20 can be prevented by this fuel flow along the outer surface of unit 20. Further, with such an arrangement, characteristics of carburetor 1 can be tested inclusive of the testing of electronic control unit 20, so that the productivity can be improved.
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