Wuxi Weifu A3973900,6P701 fuel pump, Dongfeng Cummins with Liugong machinery fuel pump

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Fuel injection pump is an important part of automobile diesel engine. The fuel injection pump assembly is generally composed of a fuel injection pump, a governor and other components together to form a whole. The governor is to ensure the low speed operation of the diesel engine and the limit of the maximum speed, to ensure that the injection volume and speed to maintain a certain relationship between the parts. The fuel injection pump is the most important part of the diesel engine, is regarded as the "heart" of the diesel engine parts, it once a problem will make the entire diesel engine work. Directory 1 products ▪ fuel injection pump icon ▪ ▪ structure; classification; principle of 2 other information ▪ ▪ ▪ ▪ classification 3 structure types of ▪ B; ▪ P 4 ▪ working principle and process of ▪ oil; oil pressure; oil quantity adjusting 5 adjusting method of 6 maintenance the 7 elements of the 8 Maintenance Fault 9 fuel consumption calculation 10 Ways 1 product introduction injection pump structure Editor Icon in-line injection the following details only pump fuel injection pump. IMG = "editorImg log-set-param" title = "" ALT = "" SRC = "http://b.hiphotos.baidu.com/baike/s%3D220/sign=087dfd359822720e7fcee5f84bca0a3a/96dda144ad345982b33dbdc50cf431adcbef8435.jpg width =" 175 "height =" 220 "/>[1] classification of fuel injection pump are inline type distribution type, single style, and other three categories, regardless of what kind, fuel injection pump is a" pump "word. The quantity, pressure and time of pump oil must be very precise, and it can be adjusted automatically according to the load. Fuel injection pump is a processing of fine, complex components, modern, modern, domestic and foreign general automotive diesel engine fuel injection pump is the world's few professional factory production. [1] working principle to direct injection pump as an example of the "pump" is how to work: the fuel injection pump must be a power source to operate, the lower part of the camshaft is driven by the engine crankshaft gear. * the key parts of the fuel injection pump is piston, if hospital common syringe to make an analogy, then the movable stopper called piston, cylinder said plunger sleeve, hypothesis in needle simply install a spring with one end of the plunger is, and the other end of the plunger piston in contact with the cam shaft, when the cam shaft to rotate a week, the piston will be in the plunger sleeve and moving a, this is the injection pump plunger basic motion. * the plunger and the plunger sleeve are the necessary parts of the machining process. There are a inclined groove and the plunger sleeve with hole, said is a suction inlet and the suction port full of diesel, when the plunger inclined groove in front of the intake port, diesel oil into the plunger sleeve, the plunger is camshaft top to a certain height, plunger tilted trough and suction stagger, suction port is closed, for sucking in diesel can not can not be pressed out of the, plunger continue to rise when the oppressed diesel and diesel oil pressure to a certain extent will top one-way valve swarmed into the nozzle, from the nozzle into the combustion chamber of the cylinder piston. * here especially to point out that the diesel engine is both into the oil pipe and the return line, into the tubing easy to understand, then what is the return line to do with it? The original plunger each time a certain amount of diesel oil, only a part of the injection into the cylinder, and the rest of the oil from the back hole to go, and the use of the amount of oil to adjust the amount of fuel injection to adjust the amount of fuel injection. * after the rise of the plunger to "TDC" move down, plunger tilted trough and and the suction port meet, diesel has been sucked into the plunger sleeve inside, repeat the above action. Straight line type fuel injection pump each group of plunger system corresponding to a cylinder, 4 cylinder there are 4 groups of plunger system, so the volume is relatively large, more used in the medium or more car. For example, buses and large trucks on the diesel engine is generally used in-line fuel injection pump. The fuel injection pump of car and light vehicle diesel engine is generally distributed, with small volume, light weight and simple parts. It uses two groups of plunger system (or a group of plunger system) pressure, respectively, into the diesel fuel injection nozzle. Its basic working principle is inside the pump has two groups of opposed piston mounted on the impeller, the impeller can be driven rotating engine plunger rotates, due to cam ring of the convex part of the dynamic pressure of the plunger, the plunger play like the action of a pump as to the center of the impeller to send oil hole pressure to send diesel, then send out the diesel full at the entrance to the distributor, and then press the order of cylinders arranged injection. Due to increase in proportion to two groups of plunger system (or a group of plunger system) action speed and number of cylinders, so the fuel injection pump by cylinder number and maximum speed limit. With the development of diesel engine technology, and the emergence of a single type fuel injection pump form (known as monomer pump or pump nozzle), it is actually the above two types of fuel injection pump "digging", each engine cylinder fuel injection by separate injection unit (monomer pump or pump nozzle) to complete. For single pump body, between the fuel injection pump and injector with a root is short of high pressure tubing connected, and for jet pump, fuel injection pump and nozzle combination as a whole, directly installed in the diesel engine cylinder cover, by the overhead camshaft drive. Their greatest advantage is to reduce or eliminate the flow and injection of diesel fuel in the process, the pressure wave formed in the high-pressure pipe. Because this