If the engine, oil pressure is lower than 0.2Mpa or vary with engine speed and high and low, or even suddenly dropped to zero, it should stop immediately to find out the reasons of burning tile, otherwise it will lead to major accidents cylinder etc.. That is what causes the engine oil pressure is too low?
A pressure limiting valve working principle knowable, the pressure limiting valve is on the balance spring and ball (or cone valve) to limit the engine oil pressure, so that the oil pressure does not exceed the specified value. Oil pressure exceeds the set value, can overcome the elastic force of the spring will push the system pressure relief valve; the oil pressure is lower than the elasticity of the spring, the valve is closed under the action of the spring. Therefore, the lubrication system oil pressure depends on the elasticity of the spring. If the adjustment spring is too small or the spring fatigue and stretch over an hour, will make the system oil pressure drop. In addition, the pressure limiting valve mechanical impurities effect is not tightly closed, also can make the oil pressure drop.
The oil pressure display device comprises an oil pressure and oil pressure sensor, which is used to reflect the oil pressure of lubrication system of engine. If the oil pressure and oil pressure sensor failure, the pressure distortion, to mistakenly believe that the lubrication system fault.
When the engine works, the oil along the tight oil in the oil pan, set the filter, pump back to the oil pan oil circulation flow, if the joint leakage will cause the oil in the oil pressure "pressure" and the pressure is too low, can not meet the need of engine lubrication. For all the fastening joint oil regularly, to prevent leaking, thus ensuring the need of oil pressure, but also increase the machine hand machine economic benefits, shoot two hawks with one arrow. In addition, the engine main bearing and shaft, connecting rod and crank of serious wear and tear, with large gap will cause insufficient engine oil pressure.
When the oil filter blockage and not for circulation, a safety valve filter base on was the top open, oil is filtered and directly into the main oil gallery. If the open pressure of safety valve set too high, when the filter is blocked when it can not be opened, and the oil pump, pressure rise, leakage increased, a corresponding reduction in the amount of oil in the main oil gallery, caused by pressure drop. Keep the clean oil filter; opening pressure correctly adjust the safety valve (usually 0.35-0.45Mpa); combined with valve replacement in spring or grinding ball and valve seat surface, restoring the normal working performance.
Oil viscosity is actually refers to the oil flow when the internal friction resistance. The internal friction of hours when the oil flow, good flow. On the other hand, the oil flow when the internal friction resistance, the poor liquidity, so the viscosity is the main measure of oil. Oil viscosity will vary with the change of temperature of oil. Oil temperature is low viscosity, high temperature and low viscosity. When the oil viscosity dilution from high temperature or other material and reduces the viscosity, lubrication system caused by increased leakage and pressure decreases. On the other hand, oil viscosity, poor mobility and plug the circuit, also can make the oil pressure to reduce friction parts
Oil filter used to filter the oil of large mechanical impurity. Adhesion in the filter on the mechanical impurities will increase with the extension of time, the oil channel section is small, pump suction oil decreases, cause the lubricating oil pressure drop, even without pressure. Oil pump suction section, if a serious shortage of tubing or joint leakage or oil bottom oil, oil pump suction chamber vacuum drop, so that the oil pump suction is not full, resulting in the lubrication system oil pressure too low
Generally speaking, which is realized by regulating valve of engine oil pressure. But if the valve regulating spring break or stretch weakened due to fatigue, so that control valve out regulation, the oil pressure oil pump output pressure is too low, can not be increased, it will affect the engine work. For the breaking of the pressure regulating spring or the loss of elasticity of the pressure regulating spring should be replaced in a timely manner
The oil shortage, will make the pump oil pump to reduce the amount of air into the pump or because of no oil, the oil pressure drop, crankshaft and bearing, cylinder liner and piston will aggravate the wear due to bad lubrication. Check the oil level in the oil pan in class work, ensure that there is sufficient amount of oil. In addition to the oil shortage, will make the pump oil pump to reduce the amount of air into the pump or because of no oil, the oil pressure drop, crankshaft and bearing, cylinder liner and piston will aggravate the wear due to bad lubrication. Check the oil level in the oil pan in class work, ensure that there is sufficient amount of oil.
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