Electric control single pump
A single pump and electronic control technology, which is applied in fuel injection pumps, engine components, machines/engines, etc., can solve the problems of increasing the pump body size, difficulty in guaranteeing, and difficulty in processing, so as to ensure processing accuracy, reduce processing difficulty, The effect of simple structure
Pending Publication Date: 2020-09-29
BEIJING INSTITUTE OF TECHNOLOGYGY
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AI Technical Summary
Problems solved by technology
[0007] 1. The coil is placed horizontally, which takes up a large space and is difficult to arrange on the engine
[0008] 2. There is no slot on the stroke limit block, and the oil in the control valve may produce an oil pad effect when the control valve moves to the left
[0009] 3. The cover plate needs to be tightened with bolts, so bolt holes should be processed on the pump body. In order to reserve a place for the bolt holes, the size of the pump body will be increased.
[0011] 1. The sealing surface at the lower end of the valve body requires high processing precision and high parallelism, which is difficult to guarantee
[0012] 2. The mating surface between the pump nozzle and the damping valve requires high precision and is not easy to process
Method used
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Embodiment Construction
[0053] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0054] This embodiment provides an electronically controlled monomer pump, see the attached Figure 4 , including: spring seat 1, plunger spring 2, plunger 3, pump body 4, pump nozzle 5, damping valve assembly, valve sleeve 17, coil 9, electromagnet pressure block 10, control valve assembly, bottom limit Block 19 and compression nut 20;
[0055] One end of the pump body 4 is processed with a plunger chamber, and the other end is processed with a pump nozzle installation hole coaxial with the plunger chamber, and the pump nozzle installation hole communicates with the plunger chamber through the first axial hole. A cylindrical boss extends from the outside of the end where the pump nozzle mounting hole of the pump body 4 is located. The axis of the cylindrical boss is parallel to the axis of the pump nozzle mounting hole. The hole communicates with the fi...
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The invention discloses an electric control single pump. The electric control single pump comprises a plunger, a pump body, a pump nozzle, a damping valve assembly, a coil, an armature, an electromagnet pressing block, a control valve assembly, a valve sleeve, a bottom limiting block and a pressing nut; the plunger is coaxially arranged in a plunger cavity of the pump body; the bottom of the pumpnozzle is installed in a pump nozzle installation hole of the pump body, and the top of the pump nozzle is connected with an oil sprayer through a high-pressure oil pipe; the damping valve assembly ismounted in a damping mounting hole of the pump nozzle; the pressing nut is fixed at the bottom of an inner hole of a cylindrical boss of the pump body, and the bottom limiting block is supported at the top of the pressing nut; a valve sleeve is arranged in the inner hole of the cylindrical boss of the pump body in an interference fit manner through a hole shaft and is positioned above the bottomlimiting block; and the control valve assembly is installed in the valve sleeve, and the armature is installed at the top of the control valve assembly. The electric control single pump has reasonablestructure layout, reduces the integral processing difficulty and improves the precision.
Description
technical field [0001] The invention belongs to the technical field of engines, and in particular relates to an electronically controlled unit pump. Background technique [0002] Compared with gasoline engines, diesel engines have the advantages of low fuel consumption and excellent emission performance. The global trend of "dieselization" of vehicle power has been formed. At present, diesel engines are developing towards high speed, light weight and high reinforcement. For the fuel system, high injection pressure and high injection rate are required for the duration of the injection. Electronically controlled unit pump and high-pressure common rail technology are currently widely used EFI technologies, both of which can realize high-pressure injection and independent control of cylinders. In view of the existing level of machining technology and oil products in my country, it will be quite difficult to solve the structural reliability and durability of the high-pressure ...
Claims
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IPC IPC(8): F02M51/04F02M59/48F02M59/46
CPCF02M51/04F02M59/485F02M59/48F02M59/46
Inventor 刘福水王字满杨旭超武治平孙柏刚
Owner BEIJING INSTITUTE OF TECHNOLOGYGY