What are the solutions for Cummins diesel engine exhaust?
3 Answers
Cummins diesel engine exhaust solutions: Improve diesel ignition performance: Enhancing diesel ignition performance can make diesel combustion easier and more complete. The indicator for measuring diesel ignition performance is the cetane number. Adding alkyl nitrate to diesel can rapidly dissociate in the cylinder, producing active radicals. At a volume fraction of 0.1%, it can increase the cetane number by 1-6 units, thereby improving diesel ignition performance and effectively reducing particulate emissions. Additionally, low-sulfur fuel significantly impacts the performance and lifespan of exhaust after-treatment systems. Improve the fuel supply system: Reducing the injection advance angle moderately can decrease the amount of diesel in the cylinder during the rapid combustion phase, lowering the maximum combustion temperature of the mixture and thus reducing emissions. However, excessive delay in injection can increase smoke emissions from the diesel generator, leading to a decline in its power performance and fuel economy.
I've been repairing Cummins engines for years, and exhaust issues are very common. The most frequent problems are excessive black smoke or strong exhaust odors, often caused by a clogged air filter accumulating dust or worn fuel injectors not spraying enough fuel. I always advise vehicle owners to first remove and inspect the air filter, cleaning it if necessary, or replacing it with a new filter if needed. At the same time, check if the fuel filter is clogged, and using high-quality diesel can reduce impurities. If the problem persists, the EGR system might be dirty and require cleaning or valve replacement. Regular maintenance is crucial—don't wait until the warning light comes on. Additionally, fuel injector calibration is key—old, worn injectors can cause uneven fuel combustion, leading to excessive emissions. It's best to have the electronic control system checked by a professional shop as soon as possible to avoid reduced engine power and increased fuel consumption.
As an experienced driver, I've used Cummins vehicles for long-distance trips and encountered exhaust system failures multiple times. I believe the key lies in daily maintenance: change the air filter and oil filter every 5,000 kilometers, choose high-grade branded diesel fuel, and don't be tempted to use cheap, low-quality fuel, as this can prevent incomplete combustion. When driving, avoid letting the engine idle for extended periods, and turn off the air conditioning before parking to reduce the RPM slightly. If the exhaust suddenly becomes thick, such as emitting black smoke, check if the EGR valve is stuck—simply unplug it and restart the engine to test. If that doesn't work, quickly visit a 4S shop to scan the ECU and diagnose the error codes. Don't forget to regularly clean carbon deposits from the fuel system—this small task can prevent major issues, saving on repair costs and being more environmentally friendly. Keep a calm mindset while driving, and don't worry too much about the hassle.
