What Causes Black Smoke from Cummins Engines?
2 Answers
It may be due to the engine idle speed being set too low, resulting in poor atomization because the fuel injection speed is insufficient. Below is relevant information about Cummins engines: 1. Introduction: Cummins Inc. (NYSE: CMI), a pioneer in diesel engine vehicles, was founded in 1919 and is headquartered in Columbus, Indiana, USA. As a global leader in power equipment manufacturing, Cummins designs, manufactures, and distributes engines and related technologies, including fuel systems, control systems, air intake processing, filtration systems, exhaust treatment systems, and power systems, along with corresponding after-sales services. 2. Advantages: With forward-looking design and development capabilities, Cummins can develop tailored solutions for different emission standards. Its mature integration capability ensures that Cummins' emission control technology achieves perfect compatibility with engine lifecycles and vehicle systems, delivering optimal economic benefits to customers.
Speaking of Cummins engines emitting black smoke, I've encountered this situation several times over the years of driving trucks. The most common cause is excessive fuel supply, such as worn or clogged fuel injectors, which leads to too much gasoline being sprayed and incomplete combustion resulting in black smoke. Another major issue is insufficient air supply, like when the air filter is dirty or blocked by dust, preventing air from entering and leaving the engine gasping for breath, causing unburned fuel to smoke. Sometimes, it's a faulty turbocharger or sensor that throws the engine control out of balance. I recommend pulling over immediately to check, otherwise prolonged driving will not only significantly increase fuel consumption and pollute the environment but may also damage the engine, which is not worth the loss. Regular air filter changes and routine maintenance can prevent these problems from occurring.
