A change in the degree of fuel atomization in a diesel engine cylinder most affects what aspect?

The degree of fuel atomization in a diesel engine cylinder significantly influences combustion within that cylinder. Proper atomization of fuel ensures that the fuel droplets are small enough to facilitate efficient mixing with the air in the combustion chamber. When fuel is well atomized, it can vaporize adequately, leading to a more complete and efficient combustion process. This results in improved power output, reduced emissions, and optimal engine performance.

If fuel atomization is poor, the resultant larger droplets may not mix effectively with air, which can lead to incomplete combustion. This may cause issues such as increased smoke, higher emissions, and reduced engine power. Thus, the atomization quality directly correlates with how well the combustion process occurs, making it the most affected aspect when there is a change in the degree of fuel atomization.