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Fault Analysis of Diesel Generator Set Emitting Black Smoke

Oct. 12, 2021

We often receive calls from customers for repairs, and they report that the diesel generator set emits black smoke and the speed is unstable during the operation of the diesel generator set. In this article, Starlight engineers will do a fault analysis on the possible problems for your reference:


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1. Insufficient intake of diesel engine


The air intake inside the combustion chamber is constant. If the air filter is not maintained in place, the carbon deposits in the combustion chamber increase, the exhaust pipe is blocked or the turbocharger is damaged, etc., the air intake inside the combustion chamber will be increased. Reduction, thereby affecting the full combustion of diesel, causing a large amount of free carbon and exhaust gas to be discharged from the exhaust pipe together.


2. Overload work of diesel generator set


During the operation of the diesel generator set, if overloading occurs, the diesel injected into the combustion chamber will increase. When the air volume in the combustion chamber remains unchanged, the excess diesel will not be fully combusted. The exhaust pipe emits black smoke.


3. Injector failure


When the fuel injector has dripping, bleeding, or poor atomization, it will cause the diesel fuel injected into the combustion chamber to delay the combustion time and cause the exhaust to emit black smoke.


4. Poor sealing of the combustion chamber


If the inside of the combustion chamber is poorly sealed, the amount of compressed air in the cylinder will decrease, and the temperature and pressure at the end of compression will decrease. The diesel injected into the combustion chamber cannot be completely burned due to insufficient air, which makes the exhaust pipe Black smoke.


5. The supply of each cylinder of the fuel injection pump is uneven


When the diesel generator set is working under the rated load, if the fuel supply of each cylinder of the fuel injection pump is uneven, it will cause the diesel engine to emit black smoke.


6. The advance angle of the fuel injection pump is too small


When the fuel supply advance angle of the diesel engine is too small, it will cause the fuel injection of the injector to be delayed, and the diesel injected into the combustion chamber will be discharged before it can be fully burned.


Jiangsu Starlight Power Generation Equipment Co., Ltd. was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. The company has a registered capital of 218.88 million yuan. The company covers an area of 86,000 square meters and a building area of 55,000 square meters. There are more than 660 employees, including 456 professional technicians and 106 senior technicians. It has 46 sales and service outlets nationwide. The main products are diesel engines, generator sets, and diesel generators, providing users with a one-stop service of design, supply, debugging and maintenance at any time. Starlight has always insisted on using first-class talents, building first-class enterprises, manufacturing first-class products, creating first-class services, and making every effort to build a first-class domestic enterprise. If any question please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to sales@dieselgeneratortech.com.

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