1. The utility model provides a take injection valves in pressure storage chamber which characterized in that: the fuel injection valve comprises an injection valve body (210), wherein a cylindrical injection fuel pressure accumulation cavity (232) is arranged at the center of the upper end of the injection valve body (210), a main cylindrical injection fuel containing cavity (230) is arranged at the lower end of the injection fuel pressure accumulation cavity (232), a conical injection control combined sealing safety groove is arranged at the bottom of the injection fuel containing cavity (230), a conical main fuel injection transition groove (211) is arranged at the lower end of the injection control combined sealing safety groove, a fuel injection outlet communicated with the outer side is formed in the main fuel injection transition groove (211), a cylindrical acceleration safety pressure accumulation cavity (240) which is larger than the injection fuel containing cavity (230) in diameter and has the same central axis is arranged in the middle of the inner cylindrical surface of the injection fuel containing cavity (230) in the vertical direction, and guide conical grooves which are in excessive stable fit are respectively arranged at the upper side and the lower side of the acceleration safety pressure accumulation cavity (240), it has needle valve (220) to spray fuel and hold chamber (230) internally mounted combination, the outside of needle valve (220) with it spouts oil pocket (231) to spray to form between fuel holding chamber (230) the medial surface, needle valve (220) bottom is equipped with conical injection control safety head, spray control safety head can with spray the sealed safety groove of control combination and closely laminate together, the degree of depth of direction is greater than about the sealed safety groove of injection control safety head height of direction from top to bottom.

2. An injection valve block with a pressure accumulation chamber as claimed in claim 1, characterized in that: and an integral assembling installation stop matching surface is arranged at the position close to the upper end of the outer side of the injection valve body (210).

3. An injection valve block with a pressure accumulation chamber as claimed in claim 1, characterized in that: an inverted cone-shaped smooth-matching safe avoiding cone groove is arranged at the upper end of the injection control combined sealing safety groove.

4. An injection valve block with a pressure accumulation chamber as claimed in claim 1, characterized in that: the upper end position of the injection control safety head is provided with a standby sealing safety and stability combination groove, and the section of the standby sealing safety and stability combination groove is of a V-shaped structure with an outward opening.

Background

The fuel injection valve makes the needle valve conical surface and the needle valve body seat surface attached or separated by controlling the needle valve to reciprocate up and down in the needle valve body, thereby controlling the start and the end of oil injection. The current injection valve group is of a matching part matching structure, a center hole of a needle valve body and a flat position of a needle valve form an oil inlet channel, or the oil inlet channel is used as an oil channel through a hole arranged on the needle valve or the needle valve body. The structure has the disadvantages of small volume, poor stability of fuel pressure, unfavorable stability in the injection process and unstable performance of the oil injector, thereby causing poor emission quality of a power assembly, high noise and high oil consumption. Although a series of throttling structures have been applied to improve these disadvantages, they have not been able to fundamentally solve the disadvantages of the conventional injection valve block structure.

Disclosure of Invention

The invention aims to provide an injection valve group with a pressure storage cavity, which adopts a brand new structural design, and can play a reliable pressure stabilizing role during use by arranging an accelerating safe pressure storage cavity at the middle position in the valve body and matching with a needle valve structure for tight combination, so that the stability of multiple injection can be improved, the emission quality is improved, the noise and the oil consumption are reduced, the durability is stronger during use, and the use safety is more guaranteed.

The technical scheme of the invention is as follows:

the utility model provides a take injection valves in pressure storage chamber which characterized in that: the injection valve comprises an injection valve body, wherein a cylindrical injection fuel pressure accumulation cavity is arranged at the central position of the upper end of the injection valve body, a main body which is a cylindrical injection fuel containing cavity is arranged at the lower end of the injection fuel pressure accumulation cavity, a conical injection control combined sealing safety groove is arranged at the bottom of the injection fuel containing cavity, a conical main body oil injection transition groove is arranged at the lower end of the injection control combined sealing safety groove, an oil injection outlet communicated with the outside is arranged on the main body oil injection transition groove, a cylindrical acceleration safety pressure accumulation cavity which is larger than the injection fuel containing cavity in diameter and has the same central axis is arranged at the middle position of the inner cylindrical surface of the injection fuel containing cavity in the vertical direction, guide tapered grooves which are in excessive stable fit are respectively arranged at the upper side and the lower side of the acceleration safety pressure accumulation cavity, a needle valve is arranged and combined in the injection fuel containing cavity, and an oil injection cavity is formed between the outer side of the needle valve and the inner side surface of the injection fuel containing cavity, the safety valve is characterized in that a conical injection control safety head is arranged at the bottom of the needle valve, the injection control safety head can be closely attached to the injection control combined sealing safety groove, and the depth of the injection control combined sealing safety groove in the vertical direction is larger than the height of the injection control safety head in the vertical direction.

Furthermore, an integral assembling installation stop matching surface is arranged at the position close to the upper end of the outer side of the injection valve body.

Furthermore, an inverted cone-shaped smooth-matching safe avoiding cone groove is arranged at the upper end of the injection control combined sealing safety groove.

Furthermore, a standby sealing safety and stability combination groove is arranged at the upper end of the injection control safety head, and the section of the standby sealing safety and stability combination groove is of a V-shaped structure with an outward opening.

The invention has the beneficial effects that:

the invention adopts a brand-new structural design, the accelerating safe pressure storage cavity is arranged in the middle position in the valve body, and the accelerating safe pressure storage cavity is tightly combined with the needle valve structure, so that the reliable pressure stabilizing effect can be achieved during use, the multi-injection stability can be improved, the emission quality can be improved, the noise and the oil consumption can be reduced, the durability is stronger during use, and the use safety is more guaranteed.

Drawings

FIG. 1 is a schematic view of the structure of the present invention in an un-injected state;

FIG. 2 is a schematic view showing the structure of the fuel injection state of the present invention;

FIG. 3 is a schematic structural view of the injection valve body of the present invention;

FIG. 4 is a schematic view of a needle valve according to the present invention;

in the figure: 210. the injection valve body 211, the main body oil injection transition groove 220, the needle valve 230, the injection fuel containing cavity 231, the oil injection cavity 232, the injection fuel pressure accumulation cavity 240 and the acceleration safety pressure accumulation cavity.

Detailed Description

As shown in fig. 1 to 4, an injection valve set with a pressure storage cavity adopts a brand new structural design, the pressure storage cavity is accelerated and arranged at the middle position inside a valve body, and is matched with a needle valve structure to carry out tight combination, so that a reliable pressure stabilizing effect can be achieved when the injection valve set is used, the multiple injection stability can be improved, the emission quality is improved, the noise and the oil consumption are reduced, the durability is stronger when the injection valve set is used, and the use safety is more guaranteed. The injection valve comprises an injection valve body 210, wherein a cylindrical injection fuel pressure accumulation cavity 232 is arranged at the center of the upper end of the injection valve body 210, a main cylindrical injection fuel containing cavity 230 is arranged at the lower end of the injection fuel pressure accumulation cavity 232, a conical injection control combined sealing safety groove is arranged at the bottom of the injection fuel containing cavity 230, a conical main injection oil transition groove 211 is arranged at the lower end of the injection control combined sealing safety groove, an oil injection outlet communicated with the outer side is arranged on the main injection oil transition groove 211, a cylindrical acceleration safety pressure accumulation cavity 240 which is larger than the injection fuel containing cavity 230 in diameter and has the same central axis is arranged at the middle position of the inner cylindrical surface of the injection fuel containing cavity 230 in the vertical direction, secondary pressurization safety matching can be carried out during high-pressure oil injection, and internal smoothness can be guaranteed during secondary injection of high-pressure injection fuel, the pressure of the high-pressure injection fuel oil is slowly reduced, and the high-pressure injection fuel oil is quickly supplemented, so that the multi-time injection stability is improved, the emission quality is improved, and the noise and the oil consumption are reduced. The upper and lower both sides of accelerating safe pressure storage chamber 240 are equipped with excessively stable cooperation direction bell groove respectively, it has needle valve 220 to spray the fuel and hold the 230 internally mounted combination in chamber, the outside of needle valve 220 with it forms between the chamber 230 medial surface to spray the fuel and spray oil chamber 231, needle valve 220 bottom is equipped with conical injection control safety head, injection control safety head can with the sealed safety groove of injection control combination is close-fitting together, the degree of depth of direction is greater than about the sealed safety groove of injection control combination the height of direction about the safety head of injection control, the whole security of guarantee oil spout position is better when using.

Preferably, the outer side of the injection valve body 210 is provided with an integral assembling and installing stop matching surface close to the upper end, so that the connection stability during later assembling of the whole injection valve body is better, and the assembling operation is more convenient.

Preferably, the upper end of the injection control combined sealing safety groove is provided with an inverted cone-shaped smooth-matching safety avoidance cone groove, so that the connection space during combination is larger, and the safety during use can be further improved.

Preferably, the upper end of the injection control safety head is provided with a standby sealing safety and stability combination groove, the cross section of the standby sealing safety and stability combination groove is of a V-shaped structure with an outward opening, the structural durability of an oil injection position can be guaranteed to be stronger, the use requirements of the double oil injection valve bodies can be met, and the flexibility in use is stronger.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications or substitutions can be made without departing from the principle of the present invention, and these modifications or substitutions should also be considered as the protection scope of the present invention.