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Beiben V3 accessories share with you the causes of abnormal exhaust smoke color of diesel engines and troubleshooting methods. The exhaust smoke of diesel engines in good technical condition is colorless and transparent gas. If the exhaust pipe emits other smoke when the diesel engine is working, it indicates that the diesel engine is not working properly. Common abnormal smoke color. Black smoke

● Cause analysis

Fuel is a hydrocarbon. If it is burned under the condition of oxygen deficiency, it will cause incomplete combustion, which will cause some carbon elements that are not completely burned to form free carbon, which will become black smoke when mixed with exhaust gas.

It can be seen from the above that the black smoke emission when the engine is working must be caused by too little air entering the cylinder or too much fuel injected into the cylinder. The main reasons for reducing the number of air entering the cylinder or excessive fuel injection are:

① The amount of air entering the cylinder is small

The blockage of the air filter reduces the flow section of the air entering the cylinder, or the turbocharger fails to work or the turbocharging function declines due to failure, resulting in a relative reduction of the amount of air entering the cylinder, resulting in oxygen deficiency and black smoke emission during fuel combustion.

In addition, some diesel engines are equipped with an anti "runaway" device on the intake pipe. If the anti "runaway" device is closed, so that the air entering the cylinder is small, it will lead to incomplete fuel combustion and black smoke.

② Too much oil is injected into the cylinder

Due to improper adjustment of the fuel injection pump and the governor, the fuel injection quantity is too large, that is, it exceeds the fuel injection quantity of each cycle of the engine, or there is a serious phenomenon of oil dripping after the injection, resulting in excessive fuel supply.

● Diagnosis and troubleshooting

Remove the air filter. If there is no black smoke from the diesel engine, it indicates that the air filter of Beiben V3 accessory is seriously blocked. Remove the blockage or replace the filter element.

If the diesel engine intake pipe is equipped with a "runaway" device, check whether it is in the closed position. If it is in the closed position, it is the reason why the diesel engine emits black smoke, and it should be opened.

If the diesel engine is equipped with a turbocharger, it shall be diagnosed and eliminated according to the fault diagnosis method of the turbocharger, or the replacement method shall be adopted, that is, the turbocharger of the same model shall be used. If there is no black smoke after replacement, it indicates that the black smoke of the diesel engine is caused by the damage of the turbocharger.

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