Baotou beiben heavy duty truck accessories power engine is insufficient and a row of black smoke is the most or all of the engine cylinder cylinder oil supply too much fuel and air mixing ratio, combustion of severe hypoxia, incomplete combustion of diesel, carbon free suspended like together with exhaust gas discharge and the formation of. If the exhaust pipe is interrupted a row of black smoke, and accompanied by a “chug” sound, that individual cylinder incomplete combustion. The reasons are summarized as follows:
Baotou beiben parts injection pump debugging is improper, the oil supply quantity is overmuch, incomplete combustion.
The poor quality of most injectors.
When the oil supply is not correct.
The intake valve opening height, opening time delay, resulting in insufficient air intake.
The Baotou beiben accessories air filter dirty air filter or incorrect installation, so that the air is not smooth.
The efficiency of the supercharger pressure drop.
The fuel quality is too poor.
The diagnosis and treatment methods
Diagnosis of such failures, the most obvious feature of the fault should be set up, whether continuous or intermittent black smoke, should comply with this principle.
If the engine suddenly smoke, but failure to run after a period of time naturally disappear, is mostly caused by poor quality fuel, due to impurities in oil injector clogging caused by injection of poor quality, black smoke exhaust, after a period of operation of high pressure oil impurities are washed away, without having to deal with the fault.
If a row of black smoke, can be considered to check whether the air inlet, the inlet pipe is deformed to increase the intake resistance. First remove the air filter cover, remove the filter and clean up after the maintenance of the test machine to observe whether the exhaust pipe is still continue to smoke black smoke. If the exhaust is significantly reduced, indicating that the air filter is too dirty or installation problems, affecting the intake, should strengthen the maintenance of the intake system.
If the inlet air flow is smooth, it should be checked whether the oil supply time is too late, the fuel supply will be too late to enter the cylinder fuel is not sufficient to be discharged to form a black smoke.
Most of the jet injector quality deteriorated, fuel atomization is poor, can not meet the needs of the shape of the combustion chamber, the combustible mixture is difficult to form part of the fuel into the free carbon is discharged. This is also one of the reasons leading to black smoke, it should also be to check the injector repair.
Check the fuel quality standard, should conform to the standard diesel engine working in the area under ambient temperature.
Inspect the turbocharger is working properly. When the supercharger fails, the pressure at the end of the air intake of the engine is decreased, which results in the decrease of the temperature and pressure at the end of the compression, which affects the spray atomization and combustion temperature of the fuel.
The Baotou beiben parts of fuel injection pump repair time is not long, lack of a row of black smoke exhaust pipe, power, should consider whether the amount of oil injection pump debugging not too much, this should be the amount of oil injection pump calibration under various working conditions, to comply with the regulation.
And if these are normal, and the engine has been running for a long time, can be considered to check the valve opening height and the opening time is correct. Use a long time can make the valve driving mechanical wear, normal valve timing and valve lift misalignment, the intake amount is reduced, the amount of residual gases in the cylinder increases, directly affect the full combustion of the fuel.
I don’t have to speed, intermittent discharge smoke, the engine can be used to diagnose fault of oil cylinder by cylinder test.
When a cylinder oil, the engine speed is significantly reduced, black smoke reduction, abnormal sound also disappeared, indicating that the cylinder oil supply is too much, the cylinder should be checked and adjusted fuel injection. If the engine speed change is small, black smoke disappear, it shows that the cylinder injector spray quality is poor, the injector should be checked and maintained. If the engine speed is still no change, the cylinder does not work, should check the pressure oil cylinder, such as fuel injection pump plunger pair, with the situation how the oil valve, fork in the oil amount regulating screw rod (the fastening screws or ring gear) with no loosening, plunger spring no broken. If it is normal, should check the work of the injector and the cylinder is a mechanical failure.