| 摘要 |
A diagnosis system and method of an LPI engine are provided to determine whether a fuel pump relay is malfunctioned by monitoring power of an output terminal of the fuel pump relay. A diagnosis system of an LPI engine includes a bombe(400), a pressure regulator(500), a relay part(300), an LPG switch(200), and an LPG ECU(100). The bombe for storing a liquefied fuel includes a fuel pump drive part(405), and a first blocking valve. The pressure regulator maintains the fuel pressure within a set range to prevent leakage of the fuel into a cylinder through an injector. The relay part includes a main relay(310) for supplying power to a plurality of sensors, and a fuel pump relay(320) for controlling operation of the fuel pump drive part. The LPG switch is operated by an operator to block the supply of the fuel in case of emergency. The LPG ECU includes a blocking valve controller, a LPG switch controller, a fuel pump relay controller, and a malfunction diagnosis part.
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