The high pressure oil pump feed forward angle is very important for the work of the diesel engine. Inadequate supply of fuel will cause engine start-up difficulties, overheating, abnormality, and poor smoke color too early and too late. For these failures, as long as careful analysis, find out the reasons can be eliminated in time, so that the diesel engine work to return to normal. First, the characteristic of the oil advance angle abnormality 1. The characteristics of the oil advance angle is too large. The diesel engine works crudely, and the cylinder emits a cylinder sound similar to the piston pin “,â€. It is difficult to start, the power is insufficient, and it is easy to turn off when idle. When the flame is turned off, there is a reversal phenomenon. When starting, the exhaust pipe emits white smoke. Black smoke, the thicker the smoke advance angle, the engine is prone to overheating, prone to water temperature is too high. 2. The characteristics of the fuel supply advance angle are too small. Difficulties in start-up, white smoke on the exhaust at start-up, white smoke after operation, and white smoke at high speed, rapid acceleration, slow acceleration, no rigid operation, engine overheating, insufficient power, and high fuel consumption. Second, the diagnosis of oil advance angle disorders 1. If the engine exhaust pipe white smoke (exhaust no water, smoke has a spicy flavor), start difficulties, weak operation, slow acceleration or diesel overheating, etc., can be judged The fuel supply advance angle is too small. 2. If the engine is difficult to start, there is a deflagration start, when the crankshaft has reversed when stopped or when there is a knocking sound during rapid acceleration, it can be judged that the fuel advance angle is too large. Third, the inspection and adjustment of fuel advance angle 1. Inspection of fuel advance angle. Remove the first cylinder (multi-cylinder) high-pressure fuel pipe, the throttle on the largest position, loosen the bleed screw to eliminate the air in the pump, crank the crankshaft, when the first cylinder has oil ejected, the oil bomb will blow a little Continue turning the crankshaft. When approaching the fuel supply position of the first cylinder, the rotation speed is slowed down. When the oil level at the tight outlet of the oil outlet valve just fluctuates, the crankshaft rotation is immediately stopped, and the upper dead point mark and the angle value on the reticle are observed, such as oil supply. The mark has not yet reached the top dead mark, which proves that the fuel supply advance angle is too large; if it exceeds the top dead center mark, it proves that the fuel supply advance angle is small. 2.Adjustment of fuel supply advance angle. Adjustment of fuel supply advance angle has the following four methods: 1 Turn the pump body method. The advance angle is changed by changing the relative position of the oil pump and the connecting plate. When adjusting, loosen the fixing bolt and rotate the fuel injection pump at an angle. At this time, the camshaft does not move, and the tappet body moves along the cam profile to move the plunger to a certain distance, thereby changing the fuel supply advance angle. In general, when the counter camshaft rotates and turns the pump body, the advance angle of the fuel supply increases, and vice versa. 2 Turn the camshaft method. When the oil pump drive shaft and the oil pump are fixed, the coupling is loosened and the camshaft of the oil pump is rotated by an angle. After the oil pump is fixed, the oil feed advance angle is changed. The principle is the same as the rotary pump body method. 3 adjust the gasket method. If the working height of the fuel pump wheel body components is reduced due to the adjustment of the gasket wear, so that the oil supply advance angle changes, the adjustment gasket can be turned over and reused. If the adjustment of gasket wear is serious, the gasket can be replaced, but It must be ensured that the working dimensions of the wheel body parts do not change. For a single-cylinder diesel engine, the adjustment of the fuel advance angle is to increase or decrease the gasket at the interface between the oil pump housing and the gear box body, and the pad angle will increase. Otherwise, the gasket will increase or decrease by 0.1 mm. Change 1.7. 4 replacement method. If the high-pressure pump is used for a long time, the plunger and the outgoing valve are worn more seriously. Replace the two pairs of components in time and recheck the adjustment of the fuel advance angle.
Mingtai third generation Medical Bridge Pendant applicable to the operating room, ward, medical room, rehabilitation room and intensive care unit and other medical places; Different models Medical Pendant have different functions.
Shandong Mingtai Medical Equipment Group Co., Ltd is established in 2000 year, supporting operating room and ICU medical equipment. Since company established, continue to develop, keep making progress, let people enjoy the health future with better quality and service. Mingtai products get ISO13485, ISO9001, CE & SFDA certification. Mingtai company have many patents. Mingtai brand series Operating Light, Operating Table, medical pendant, Hospital Bed and air disinfection equipment meet different distributor and customer`s different requirement.
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