What Causes a Diesel Engine to Emit Black Smoke with a Chugging Sound?

[StLucas]

The reasons for a diesel engine emitting black smoke with a chugging sound: 1. Insufficient compression force; 2. Changes in combustion chamber shape and volume; 3. Poor injector performance; 4. Excessive fuel supply; 5. Incorrect fuel injection timing; 6. Excessive intake and exhaust resistance; 7. Incorrect valve clearance adjustment; 8. Changes in engine valve timing; 9. Poor fuel injection pump performance; 10. Poor diesel quality, where performance indicators fail to meet requirements, leading to poor combustion. The advantages of diesel engines include high power and good economic performance. The working process of a diesel engine shares many similarities with that of a gasoline engine, with each working cycle also going through the four strokes of intake, compression, power, and exhaust.