| 摘要 |
The present invention relates to a fuel switching control method for a bi-fuel engine, wherein the method comprises: a fuel remaining amount measuring step of measuring a level of first fuel if first fuel driving conditions are satisfied when a user selects a first fuel mode; a fuel amount comparing step of checking if the amount of the first fuel measured in the fuel remaining amount measuring step is below a first reference value, after performing the fuel remaining amount measuring step; a fuel spraying amount comparing step of calculating an accumulated fuel spraying amount of the first fuel and checking if the accumulated value of the fuel spraying amount is below a second reference value, after performing the fuel amount comparing step; a mileage comparing step of calculating an accumulated mileage of a vehicle and checking if the accumulated mileage is below a third reference value, after performing the fuel spraying amount comparing step; a pressure comparing step of checking if the pressure of a fuel supply rail and a fuel tank of the first fuel is more than or equal to a fourth reference value and a fifth reference value, after performing the mileage comparing step; a pressure comparing step of checking if the pressure change amount of the fuel supply rail and the fuel tank of the first fuel is below a sixth reference value and a seventh reference value, after performing the pressure comparing step; and a second fuel mode driving step of driving by converting a mode into a second fuel mode. |
