ADVANCE METHOD FOR DIESEL ENGINE STARTING ABILITY FOR MIXING FUEL OF NATURAL GAS AND HYDROGEN

摘要

Disclosed is a method for improving startability of an engine running on fuel mixed with natural gas and hydrogen. The method for improving startability of an engine running on fuel mixed with natural gas and hydrogen comprises: (a) a step of driving an engine into which natural gas fuel is injected to input a first engine control variable including delay time up to an occurrence of an increase in a number of engine revolutions and a number of engine revolutions after the delay time into an engine ECU; (b) a step of injecting fuel mixed with natural gas and hydrogen at a prescribed ratio into the engine; (c) a step of driving the engine into which the mixed fuel is injected after step (b) to check delay time of a first start; (d) a step of driving the engine into which the mixed fuel is injected after step (b) to check a number of engine revolutions during a time period set at the first start; (e) a step of determining a hydrogen content percentage contained in the mixed fuel through a second engine control variable including the delay time of step (c) and the number of engine revolutions of step (d); (f) a step of inputting the second engine control variable including the delay time and the number of engine revolutions corresponding to the hydrogen content percentage determined in step (e) into the engine ECU; and (g) a step of changing the second engine control variable to correspond to the first engine control variable to drive the engine under a condition after a second start of the engine after step (f).