| 摘要 |
PURPOSE: A fuel pump control method of LPI hybrid vehicle is provided to minimize the fuel pumping noise by maintaining a proper fuel supply pressure during operation of the motor. CONSTITUTION: A fuel pump control method of LPI hybrid vehicle comprises a step of determining whether the vehicle is in a motor driving mode or an engine driving mode(S1), a step of comparing the current fuel pressure with the lower limit of a target pressure range if in the motor driving mode(S2), a step of operating the fuel pump in case the fuel pressure is equal to or less than the target pressure range(S3), a step of comparing the current fuel pump with the upper limit of the target pressure range when the fuel pressure increases(S4), a step of stopping the operation of the fuel pump when the fuel pressure exceeds the upper limit of the target pressure range(S5), and a step of continuing the operation of the fuel pump when the fuel pressure is equal to or less than the upper limit of the target pressure range.
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