What results from excessive fuel in a diesel engine?

Excessive fuel in a diesel engine leads to the production of unburned fuel and soot. When the fuel-air mixture is not optimally balanced, the engine struggles to achieve complete combustion. This incomplete combustion results in unburned fuel being expelled from the exhaust system, as well as carbon particles forming soot.

Soot buildup can lead to several operational issues, such as clogged filters and increased maintenance requirements. Additionally, unburned fuel contributes to higher emissions, which can harm the environment and violate regulatory standards. Proper fuel management is crucial in maintaining engine efficiency and reducing emissions, making this understanding vital for diesel engine operation.