The present invention relates to a method of controlling a bi- fuel vehicle fuel . ; The invention inclination measurement step of irradiating the inclination of a stopped vehicle; The result of the measurement step, the inclination force gasoline comprising a gasoline fuel if forced to use a slope region ; provides a fuel control method for a vehicle including a Bi-Fuel ; According to the present invention, the vehicle starting from the plains , or you can use a randomly selected petrol or gas fuel when the day while driving , the vehicle is forced to use gasoline because if you want to improve your climbing ramp from the ramp performance and fuel economy to prevent deterioration there are effects that you can . ; bi- fuel vehicle fuel
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