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Fold fault judgment
Tracheal black smoke
Analysis of the cause of the failure:
(1) The air filter is severely blocked.
(2) The injection time is too late.
(3) The injection nozzle is faulty or the injector model is not right.
(4) Injecting pump failure or smoke limiter (or supercharged compensator) is not adjusted.
(5) Supercharger failure.
(6) Cooler failure.
(7) The exhaust brake valve is in a closed position.
(8) Insufficient cylinder pressure.
Judgment and exclusion method:
According to the above aspects, the following is discussed below:
(1) Before checking the exhaust pipe, the air filter should be removed first. If the diesel machine is broken, it will cause black smoke due to the severe blockage of the air filter causes insufficient intake. At the same time, it should also be checked whether the intake pipeline has a blocking phenomenon, such as the intake tube to absorbide.
(2) The oil supply volume of the injection pump or the amount of supply volume of each cylinder is too uneven, and the exhaust pipe will be black, so the oil supply volume of the injection pump must be re-adjusted. Smoking Restrictor If the adjustment is not properly caused, the exhaust pipe is black, and the smoke limiter adjusts the screw to reduce the amount of smoke, but the adjustment will cause the engine to be weak.
(3) The pressurizing machine impeller or turbine of the supercharger will reduce the intake air, causing exhaust pipe to kill black smoke. The exhaust pipe or supercharger interface is severe, and it will cause insufficient intake, and exhaust pipe is black or the engine power is lowered.
(4) Empty-air-cooled intercoolers heat dissipation will reduce intake air, exhaust pipes, black smoke, therefore, in daily maintenance, the conventional conventioner should be cleaned to make it smooth.
(5) If the exhaust brake valve is in a closed state, it will cause a lot of black smoke, and the engine accelerates and weak.
(6) Insufficient cylinder compression pressure is one of the main causes of exhaust pipes.
If the cylinder pressure is insufficient, after the engine starts, the gray-white smoke is started, and the increase in the temperature of the diesel engine changes to black smoke.
The main reason for the analysis of the lack of cylinder pressure is:
(1) The valve clearance is too large or there is no gap;
(2) The valve seat is unreasonable;
(3) The piston is too large and the cylinder is too large; the piston ring lost elastic or too much broken air leakage;
(4) The camshaft is severely worn, causing insufficient intake, unusual exhaust, and inspect the wear of the camshaft, and can measure the valve with 10mm percentage. If the wear is seriously replaced.
