・ Displacement of 1 cylinder = 2000/4 = 500 ml
・ Amount of air in the cylinder = 500 * 0.3 = 150 ml ※ Charging efficiency=0.3
・ Amount of oxygen in the cylinder = 150 * 0.2 = 31.5 ml ※ Oxygen percentage=0.2
・ Oxygen mass in cylinder = 32(g)*31.5/(22.4*1000) = 0.045 g
・ Required fuel mass = 0.0429 / 14.7 = 0.00306 g
・ Required fuel volume = 0.00306/0.73 = 0.00419 cm3 = ml
<Generalization>
The generalized formula is
■How long does it take to empty a full fuel tank.
In the above, we calculated the injection amount per cylinder, but this time we need to consider the injection amount for 4 cylinders.
<prerequisite>
・ Tank capacity:50L
・ Engine speed:800rpm (when idling)
<Method of calculation>
・ Number of injections per minute=800*2 =1600回 (2 combustions per engine revolution)
・ Fuel injection amount for 1 minute=1600 * 0.00419(ml)=6.704ml
・ Time to consume 50L=50/0.006704=7458.23 minutes=124.3 hours=5.19 days