디젤 엔진 출력 부족의 원인과 분석

디젤 엔진 출력 부족의 원인과 분석
1, the air filter dirty
Reduce air flow, dirty air filter will result in increased resistance. Volumetric efficiency drop, resulting in a lack of engine power. Upon request, clean diesel engine air filter paper wick or filter the dust cleared, if necessary, replace the filter.
2, the exhaust duct obstruction
Fuel efficiency. Power down. Should check the exhaust pipe as a result of too much carbon deposition resistance increase in the exhaust guide. General exhaust back pressure should not exceed 3.3kPa, the exhaust pipe is not blocked will cause the exhaust flow. Usually should be kept clear down the exhaust pipe of coke.
3, the injection timing is too large or too small
White smoke will be too late, injection timing is too large or too small will result in pump fuel injection time too early or too late (too early injection is incomplete combustion of fuel, the fuel will burn not sufficient) to the combustion process not at its best. You should check the injector shaft adapter screw is loose, if you loose, you should re-adjust the injection timing in accordance with requirements, and tighten the screws.
4, the piston and cylinder liner strain
And piston ring gumming caused by friction loss increases, due to the engine piston and cylinder liner wear too serious or strain. Mechanical damage caused by the engine itself increases the compression ratio decreases, the fire difficult or incomplete combustion, lower inflation increases, the leak worse. At this point, replace the cylinder, piston and piston rings.
5, the fuel system failure
Resulting oil is not smooth, 1) inside the pipe into the fuel filter or air or obstruction. Lack of power, or even fire difficult. Should clear the air into the pipe, clean diesel engine fuel filter, replace if necessary.
At this point likely to lead to short-cylinder, 2) damage caused by oil injection couplings, killed or poor atomization. Lack of engine power. Should be cleaned, grinding or replacement.
Timely inspection, repair or replacement of couplings, 3) fuel oil can also cause a lack of lack of motivation. Emphasis on the amount of new oil pump adjustment.
6, cooling and lubrication system failure
As the cooling or lubrication system failure caused by engine overheating. This case will lead to water temperature and oil temperature is too high, prone to cylinder or piston ring stuck. When the diesel engineexhaust gas temperature increases, should check the cooler and the radiator, remove scale.
7, cylinder head failure group
In turn lead to incomplete combustion of fuel, 1) because the exhaust leak into the gas caused by insufficient or mixed into the exhaust gas. Power down. Should be grinding the valve and valve seat mating surface to improve the seal, if necessary, replaced.
Cause coolant into the engine body, 2) the body of the cylinder head and cylinder joints will leak into the waterway or body of the gas oil road. If found to be not in time will lead to “sliding tile” or black smoke, so that the lack of engine power. As the cylinder head gasket is damaged, there will be an air speed mat out from the cylinder, the engine will be running at the gasket blisters appear, at this time should be required to tighten the cylinder head nut torque or replace cylinder head gasket.
Resulting in decreased engine power, 3) incorrect valve clearance will cause leakage. Even the fire difficult. Upright doors should be re-adjusted clearance.
Valve leakage, 4) valve spring will cause damage to the valve back to bit difficult. Gas compression ratio decreased, resulting in a lack of engine power. Timely replacement of the damaged valve spring.
The lack of engine power. Maintenance should be removed, 5) leak hole injector device or lack of copper can cause damage to the tank pad. And replace damaged parts. If the water temperature is too low, will lead to increased heat loss, this time to enter the temperature should be adjusted so that the required value.
8, connecting rod and crankshaft connecting rod journal bearing surface scratches
This is due to blocked oil oil Road, damage to oil pump, oil filter blocked, this situation will be accompanied by the appearance of abnormal sound and engine oil pressure drops and so on. Low or no oil or hydraulic oil and other causes at this time, removable engine side cover, check connecting rod side of the gap, to see whether the connecting rod move back and forth, if they can not move, it means that bite wool, should be repair or replace the connecting rod bearing.