| The high-pressure common rail pump failure eight |
The high-pressure common rail pump failure eight Phenomenon, electric controlled high pressure common rail diesel engines, gear pumps no oil in the fuel system to re-exclude air sometimes. A gear pump oil, it is not work. We must give the oil pump to add some priming oil. It lubricated and sealed gear pump to work (as mounted engine gear oil pump plus priming oil). 2, in order to fuel supply systems for exhaust air. 3, our high-pressure common rail system return pipe is submerged in the tank bottom (inlet pipe) so that it is the air return pipe must also be ranked clean. 4, to ensure that sufficient inner diameter for the pipeline. (Typically 2-3 mm) than the tubing inside diameter of the States II engine. 5, when the gear pump priming oil seal began normal rail pressure controller, the fuel supply to the high-pressure pump plunger assembly to be rail pressure to achieve the required quality and low pressure oil return valve to and from the tubing and the fuel tank back and forth oil (also in exhaust air of the low pressure cycle oil) 6, the plunger gear oil pump for oil. The air in the high voltage rail high-pressure pump high pressure oil through the fuel injectors and rail pressure limiting valve automatically excluded. It is also discharged with the air of the States II engine high pressure pipe. (We have repairman installed engines, in order to start as soon as the fight for the first time to play starter. Six high-pressure tubing joints loosen, to be high-pressure tubing in the oil and then tighten the high pressure tubing, the second fight starter Guarantee can smoothly start the engine. discharge of high pressure pipe, the air is faster.) 7, as long as our electronically controlled fuel injectors and rail pressure pressure limiting valve is good. The high-pressure rail pressure is always maintained not fall, the engine stopped and then a long time, next time it can start soon. The phenomenon of two, two high-pressure pump flowline no oil: so that the rail pressure is built up. If the metering unit, no problem, or a low-pressure part of the problem. The gear pump fuel into the high-pressure pump. Phenomenon, the day before yesterday for a new pump. Oil. Maximum speed can reach 2300. New problems came out, power can also be But opened more than half the time to. Speed up to 1500, open for some time, and died. Now ask. Can cause such problems, I really can not remember what causes it. Is not the oil have a problem! This case also appeared before the service station. Not the oil filter plugging, causing the oil pressure build up cause stalling problems! Previously in some cases, we found that the problem of oil, filter clogging serious, in short, into the oil pump and into the oil pressure below standard. The phenomenon of four, the engine 1500 rpm to accelerate - 1,500 rpm is a failure mode of the engine. From the engine protection. The water temperature is too high and the low oil pressure and all belong to this type of protection. Engine acceleration on: First, the rail pressure is not enough: a low pressure oil of the two common-rail pressure relief valve on the 3 measurement unit 4 high-pressure pump. Second, the electrical part of the wiring harness connector problems. Phenomenon, traffic in mind the amount of valve What is the role! Fluctuations and pressure of the hydraulic control common rail? Also controls what? Tell us about? Traffic unit and the injector, common rail actuator. It is integrated installation on the high pressure pump. Real-time precise control to achieve high-pressure pump to adjust the fuel pressure into the fuel within the common rail pipe. The phenomenon of six The oil flow through the fuel metering unit is too small: the lack of low-voltage total oil. The result is the rail pressure is not enough, the engine unable to. The phenomenon of seven oil flow through the fuel metering unit is too small: the lack of low-voltage total oil rail pressure, engine unable to. I want to discuss not produce this fault code will produce failure, I want to know is: computer How did the oil flow through the fuel metering unit is too small "? In other words: the computer how to measure the fuel flow through the fuel metering unit? Phenomenon, fuel metering unit fuel injector as the actuator is not responsible for the measurement of oil, only controlled by the computer (ECU). The results of a rail pressure is not enough, the computer (ECU) learned that flows through the fuel metering unit, fuel is too small. 2 injector spray the fuel than oil, computer (ECU) of the fuel metering unit learned that flow through the fuel metering unit, fuel is too small. These two points are due to the credit of the rail pressure sensor |
