Why Does a Diesel Engine Emit Black Smoke?

[DelEvelyn]

Here are the main reasons why a diesel engine emits black smoke: 1. Poor diesel quality—the diesel used does not meet the required performance standards, leading to incomplete combustion and black smoke; 2. Clogged air intake—insufficient air supply during diesel combustion results in incomplete combustion, causing the diesel engine to emit black smoke; 3. Insufficient compression—failure to achieve the required pressure for combustion worsens combustion conditions, leading to black smoke; 4. Changes in the combustion environment—long-term use of the diesel engine and other factors can alter the shape and volume of the combustion chamber, further degrading the quality of the fuel-air mixture. Poor combustion conditions then result in black smoke.