What happens to fuel atomization quality if the engine speed decreases?

When engine speed decreases, the quality of fuel atomization typically worsens. This degradation occurs because atomization relies on a certain level of energy and pressure to break the fuel into fine droplets that can mix with the air in the combustion chamber effectively. At lower engine speeds, the available momentum and pressure to facilitate this process can be reduced.

With slower speeds, the fuel injectors may not operate optimally, leading to larger fuel droplets rather than a fine mist. This larger droplet size can negatively impact fuel-air mixing, combustion efficiency, and ultimately engine performance. Reduced atomization quality can cause incomplete combustion, higher emissions, and a loss of power.

In contrast, at higher engine speeds, the injectors can achieve better atomization due to higher pressure and increased energy input, leading to a more efficient combustion process. Therefore, as engine speed decreases, the overall efficiency of fuel atomization is compromised, resulting in poorer quality.