A naturally aspirated engine can also have a slightly larger than 100% volumetric efficiency, but it will only happen for a short duration, and is usually only in the peak of the powerband. ![]() A forced induction engine will have a larger than 100% volumetric efficiency since the intake charge and combustion chamber are being pressurized. If a 2.0L engine fills with 3.0L of an air/fuel mixture, we say its volumetric efficiency is 150%. If a 2.0L engine is filled with 2.0L of an air/fuel mixture, we say its volumetric efficiency is 100%. ![]() ![]() Volumetric efficiency is based on cylinder fill. On four stroke engines, it is important to realize that the cam rotates once for every two rotations of the crankshaft.
0 Comments
Leave a Reply. |