| 摘要 |
PURPOSE: A fuel switching method for a bi-fuel car is provided to improve the accuracy of controlling the fuel injection amount as the injection amount increases or decreases according to the amount of the fuel accumulated on an inner wall. CONSTITUTION: A fuel switching method for a bi-fuel car comprises following steps. A fuel switch signal is received(100). First fuel being used, the number of jetting times of second fuel to be converted, the main jetting amount per each jetting time are determined(200,210,220). The number of the jetting times using the accumulation amount of the first fuel on the wall is determined. The number of the jetting times for completing the accumulation amount of the second fuel on the inner wall is determined(300). The corrected jetting quantity of fuel is calculated on the basis of the accumulation amount of the first and second fuel(400). The corrected jetting quantity of the fuel is subtracted from the main injection amount of the first fuel, and the injection amount of the first fuel is controlled. The corrected jetting quantity of the fuel is added to the main injection amount of the second fuel, and the injection amount of the second fuel is controlled(500). The conversion of the fuel is finished(600). [Reference numerals] (100) Receiving a signal for converting fuel; (210) Determining the amounts of first fuel injection and second fuel injection; (220) Determining the number of injecting the first and second fuels and injection amount per one injection when converting the fuel; (300) Determining the number of the jetting times using the accumulation amount of the first fuel on the wall; (400) Calculating the corrected jetting quantity of fuel; (500) The corrected jetting quantity of the fuel is subtracted from the main injection amount of the first fuel, and the injection amount of the first fuel is controlled; (600) The conversion of the fuel is finished |
