The fuel does not come and burn completely. It does not even reach the peak of combustion. The engine enters the next stroke, and the combustible mixture is discharged. The reasons for this phenomenon and the elimination methods are as follows: (1) The injection advance angle is too small. The approach is; adjust the advance angle, replace the wear parts. (2) Misalignment of the valve timing or just the wrong gear installation. The corrective measures are promptly corrected. (3) Some injectors are clogged, and the outlet valve occasionally shows severe wear. The treatment is to replace worn parts. (4) The exhaust valve does not close tightly, the valve spring is too weak, the spring is broken, or the valve clearance is too small. The solution is: Grind or replace the valve and adjust the valve clearance. (5) The injector needle valve is badly sealed and there is a phenomenon of oil dripping. The treatment method is to replace the needle valve. (6) Partial valve push rods are bent and stuck. The treatment is to replace worn parts. In short, abnormal exhaust is a comprehensive reflection of internal engine failures. Therefore, whether the exhaust gas is normal or not is one of the important signs of judging the working condition of the engine. Timely processing can ensure the normal operation of the diesel engine and avoid unnecessary economic losses.
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