What Causes a Diesel Vehicle to Emit Black Smoke When Accelerating?

[Leanne]

Here are the reasons why a diesel vehicle emits black smoke when accelerating: 1. Poor diesel quality: The diesel used does not meet standard performance requirements, leading to incomplete combustion and black smoke. Additionally, low-quality diesel can damage the diesel filter, causing the diesel inside the engine to degrade, which results in black smoke emissions. 2. Clogged air intake: The diesel engine's fuel tank is not sealed, and prolonged exposure to air can allow impurities and dust from the air to accumulate in the air filter. These particles can block the air intake, preventing sufficient air supply during diesel combustion, which easily leads to incomplete combustion and black smoke emissions. 3. Insufficient compression: One of the conditions for diesel combustion is a pressurized combustion environment. However, if components such as valves and piston rings are worn, the compression pressure may be insufficient, failing to meet the combustion requirements. This worsens the combustion conditions, leading to black smoke emissions from the diesel engine.