A32823060460426270 BOSCH fuel pump

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Distribution of a variety of diesel fuel pump assembly, the phone 0719-8255028 fuel injection pump is an important part of the automotive 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. [1] classification with in-line fuel injection pump, distribution type, single type three categories, no matter what kind of fuel injection pump, the key lies in a" pump ". 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 fuel injection pump plunger is, if the syringe to hospital common analogy, then the movable plug is called the plunger cylinder is called the plunger sleeve, assuming a needle mounted on the inside in spring pushes the plunger piston at one end, the other end in contact with the cam shaft, the cam shaft when rotating a week. A plunger in the plunger moves up and down, this is the basic motion of plunger. * the plunger and the plunger sleeve are the necessary parts of the machining process. The plunger body has a tilting chute, plunger holes called suction, the suction port is filled with diesel, when the plunger suction to the inclined groove, diesel oil into the plunger, the plunger is camshaft top to a certain height, plunger inclined groove and the suction port staggered, suction port is closed the diesel engine can not inhaled can not be extruded. The piston continues to rise when the pressure of diesel, diesel oil pressure to a certain extent will open the one-way valve poured out into the nozzle, the nozzle into the cylinder combustion chamber. * 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. * when the plunger up to "TDC" after moving down, the plunger and inclined groove will meet the suction, and diesel oil is sucked into the plunger sleeve inside, repeat the above motion. 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 principle is that there are two groups of opposed piston is mounted in the impeller in the pump, the impeller is driven by the engine rotates, the plunger rotates, the protruding part of the cam ring pressure piston, the piston pump role to play as a central oil supply hole impeller pressure to send diesel, then send out diesel full distributor at the entrance, and then according to the order of injection cylinder. The two group (or group of plunger plunger system system) action speed and the cylinder number increased in proportion, so this kind of fuel injection pump by cylinder number and maximum speed limit. With the development of diesel engine technology, and the rise of a single type fuel injection pump form (called single pump or pump nozzle), it is actually the fuel pump "the two types of each cylinder fuel engine, break up the whole into parts" by the respective independent jet injection unit (single pump or pump nozzle) to complete. For the single pump, between the fuel pump and nozzle with a short high-pressure tubing connected to the pump nozzle, fuel injection pump and nozzle combination as a whole, directly installed in the diesel engine cylinder cover, driven by the overhead camshaft. Their greatest advantage is to reduce or eliminate the flow of diesel oil.