| 摘要 |
PURPOSE: A fuel supply device for preventing knocking is provided to prevent a knocking phenomenon occurring in low-speed high load while reducing usage of high-octane fuel. CONSTITUTION: A fuel supply device for preventing knocking has plural injectors(4) driving according to the control of an ECU(Electronic Control Unit,5) and supplying fuel to a combustion chamber. The fuel supply device for preventing knocking comprises a first fuel rail(1) to which common fuel is supplied; a second fuel rail(2) to which high-octane fuel is supplied; and a three-way valve(3) selectively supplying the common fuel supplied through the first fuel rail and the high-octane fuel supplied through the second fuel rail, to the injectors.
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