CN217926102U - Fuel metering valve - Google Patents

Abstract

The utility model relates to an injector technical field especially relates to a fuel metering valve. The fuel metering valve mainly comprises a shell, an adsorption assembly, a sealing base, a valve plate assembly and an adjusting assembly. Wherein the adjustment assembly includes an elastic member and a cotter pin. The fixed end of the elastic piece is abutted to the valve plate assembly, and the end of the cotter pin is abutted to the free end of the elastic piece, so that the elastic piece is in a compressed state. The fuel metering valve is simple in structure, the dynamic flow of the fuel metering valve is adjusted through the elastic piece and the split pin, the elastic piece and the split pin are not required to be fixedly connected through a welding process or a riveting process, and therefore the risk that the pretightening force of the elastic piece changes due to the fact that the position of the fixing piece which is propped against the elastic piece is changed due to the heat influence force generated by welding is avoided. The pre-tightening force of the elastic piece is adjusted by adjusting the position of the split pin, the dynamic flow is adjusted, the reliability and the stability of the fuel metering valve are improved, and the cost is saved.

Description

Fuel metering valve

Technical Field

The utility model relates to an injector technical field especially relates to a fuel metering valve.

Background

The fuel metering valve is a core component in an engine or a fuel cell device, and the pulse width duty ratio of the fuel metering valve is adjusted by an Electronic Control Unit (ECU) according to the operating condition of the engine to Control the fuel gas injection quantity and ensure that the engine operates under a set air-fuel ratio. The fuel can be natural gas, hydrogen fuel or renewable gas fuel, and the like, and the accurate flow control and air tightness of the fuel metering valve are high in requirements during operation.

The dynamic flow is an important index of the fuel metering valve, and the dynamic flow of the fuel metering valve is required to be properly adjusted in the production and manufacturing process so as to meet the requirements of clients. The dynamic flow of the fuel metering valve in the prior art is characterized in that the pretightening force of the spring is adjusted at the manufacturing end, the spring is propped by adopting parts such as a fixing part, and then the fixing part is fixed in a riveting or welding mode, so that when riveting or welding are carried out, the position of the part propped against the spring is changed up and down due to the generated heat, the spring cannot be firmly propped, the pretightening force of the spring is changed, the accuracy of dynamic flow adjustment is influenced, the use performance of a product is influenced, and the cost is increased.

Therefore, it is desirable to design a fuel metering valve to solve the technical problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fuel metering valve, this fuel metering valve simple structure can realize improving dynamic flow control's accuracy, practices thrift the cost to fuel metering valve dynamic flow's accurate regulation.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a fuel metering valve, include:

the device comprises a shell, a feed port is formed in the shell, and an adsorption assembly is arranged in the shell;

the sealing base is movably connected with the shell, the sealing base, the shell and the adsorption assembly jointly enclose a first accommodating chamber, and the feed hole is communicated with the first accommodating chamber; a discharge hole is formed in the sealing base, one end of the discharge hole is communicated with the first accommodating cavity, and the other end of the discharge hole is communicated with a cavity of the internal combustion engine;

a valve plate assembly movably disposed in the first containment chamber;

the adsorption component is internally provided with an installation channel, the adsorption component can adsorb the valve plate component under a first preset condition, and the adsorption component can break adsorption with the valve plate component under a second preset condition, so that the valve plate component can realize lifting motion in the first accommodating chamber;

the adjusting part, the adjusting part sets up in the installation passageway, the adjusting part includes elastic component and split pin, the stiff end butt of elastic component in the valve plate subassembly, the tip butt of split pin in the free end of elastic component, so that the elastic component is in the compression state.

As an alternative solution of the fuel metering valve, the split pin is connected with the mounting channel in an interference fit manner, and the split pin is arranged above the elastic member along the height direction of the adsorption assembly.

As an optional technical solution of the fuel metering valve, the split pin includes a connecting portion and an abutting portion, the connecting portion and the abutting portion are integrally formed, the connecting portion is connected with the installation channel in an interference fit manner, and the abutting portion is connected with the installation channel in a clearance fit manner.

As an optional aspect of the fuel metering valve, a first opening is formed in the split pin, and the first opening penetrates the connecting portion and the abutting portion in a height direction of the split pin.

As an optional technical scheme of the fuel metering valve, a stepped hole is formed in the valve plate assembly, the mounting channel and the stepped hole are coaxially arranged, and the fixed end of the elastic piece abuts against the stepped hole.

As an alternative to the fuel metering valve, the fuel metering valve further includes a sealing stem disposed in the mounting channel, the sealing stem being removably coupled to the adsorbent assembly.

As an optional technical solution of the fuel metering valve, a second external thread is provided on the sealing rod, a second internal thread is provided on an inner wall of the mounting channel, and the second external thread is connected with the second internal thread.

As an optional technical scheme of the fuel metering valve, a polygonal counter bore is arranged on the sealing rod.

As an optional technical scheme of the fuel metering valve, the adsorption assembly comprises an armature, the armature is connected with the shell, a coil framework wound with an electromagnetic coil is arranged on the peripheral side of the armature, the electromagnetic coil is electrically connected with a vehicle controller, and the vehicle controller can control the current on-off of the electromagnetic coil.

As an optional technical scheme of the fuel metering valve, a contact pin extends from the electromagnetic coil, a second through hole is formed in the armature, one end of the contact pin is connected with the electromagnetic coil, and the other end of the contact pin is connected to the vehicle controller in an inserted mode.

The beneficial effects of the utility model include at least:

the utility model provides a fuel metering valve, this fuel metering valve mainly include casing, adsorption component, seal base, valve plate subassembly and adjusting part. Wherein, the adjusting component comprises an elastic piece and a cotter pin. The fuel metering valve is simple in structure, the dynamic flow of the fuel metering valve is adjusted through the elastic piece and the split pin, the elastic piece and the split pin are not required to be fixedly connected through a welding process or a riveting process, and therefore the situation that in the prior art, due to the fact that the pretightening force of the elastic piece is changed due to the heat influence force generated by welding, and the accuracy of dynamic flow adjustment is influenced is avoided. The utility model discloses in realize the regulation to the elastic component pretightning force through the position of nimble adjusting split pin, and then realize improving fuel metering valve's reliability and stability to dynamic flow's regulation, simplify process steps, practice thrift the cost.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic diagram of a fuel metering valve according to an embodiment of the present invention;

FIG. 2 is an exploded schematic view of a fuel metering valve provided in an embodiment of the present invention;

FIG. 3 is an exploded view of part A of FIG. 2;

FIG. 4 is a cross-sectional view of a fuel metering valve provided by an embodiment of the present invention;

FIG. 5 is a partial enlarged view of the portion B in FIG. 4;

FIG. 6 is a schematic flow diagram of fuel media in a fuel metering valve provided in an embodiment of the present invention;

FIG. 7 is a schematic structural view of a valve plate assembly provided in an embodiment of the present invention;

FIG. 8 is a cross-sectional view of a valve plate assembly provided in an embodiment of the present invention;

fig. 9 is a schematic structural view of a sealing base according to an embodiment of the present invention;

figure 10 is a cross-sectional view of a sealing base provided by an embodiment of the invention;

fig. 11 is a schematic structural view of an armature provided in an embodiment of the present invention;

fig. 12 is a cross-sectional view of an armature provided by an embodiment of the invention;

fig. 13 is a schematic structural view of a sealing rod according to an embodiment of the present invention;

fig. 14 is a schematic structural view of a cotter pin according to an embodiment of the present invention;

fig. 15 is a schematic structural view of a first housing according to an embodiment of the present invention;

fig. 16 is a cross-sectional view of a first housing provided by an embodiment of the present invention;

fig. 17 is a schematic structural view of a second housing according to an embodiment of the present invention;

fig. 18 is a sectional view of a second housing provided in an embodiment of the present invention.

Reference numerals

100. A housing; 110. a first housing; 1101. a fifth seal ring; 1102. connecting pins; 1103. a first recess; 1104. riveting parts; 1105. a second recess; 120. a second housing; 1201. a feed port; 1202. a first internal thread; 1203. a first projecting portion; 1204. a second projection;

200. an adsorption component; 210. a second preset gap; 220. a third buffer member; 230. an armature; 2301. a second through hole; 2302. a third through hole; 240. a coil bobbin; 2401. a second seal ring; 2402. a third seal ring; 250. an electromagnetic coil; 2501. inserting a pin;

300. sealing the base; 310. a discharge hole; 320. a first external thread; 330. a rib is protruded; 340. a first mounting portion; 350. a first seal ring; 360. a sixth seal ring;

400. a valve plate assembly; 410. a first preset gap; 420. a first through hole; 430. a first buffer member; 440. a second buffer member; 450. a stepped hole;

500. an adjustment assembly; 510. an elastic member; 520. a cotter pin; 5201. a connecting portion; 5202. an abutting portion; 5203. a first opening;

600. a sealing rod; 610. a polygonal counter bore; 620. a fourth seal ring;

700. a filter screen; 800. a cover body; 900. and a dust cover.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 5, the present embodiment provides a fuel metering valve that mainly includes a housing 100, an adsorption assembly 200, a seal mount 300, and a valve plate assembly 400. Wherein, be provided with adsorption component 200 in the casing 100, and seted up feed port 1201 on the casing 100. The sealing base 300 is movably connected with the shell 100, the sealing base 300, the shell 100 and the adsorption component 200 together form a first accommodating chamber, and the feed hole 1201 is communicated with the first accommodating chamber; the sealing base 300 is provided with a discharge hole 310, one end of the discharge hole 310 is communicated with the first accommodating chamber, and the other end of the discharge hole 310 is communicated with the cavity of the internal combustion engine. The valve plate assembly 400 is arranged in the first accommodating chamber, the adsorption assembly 200 can adsorb the valve plate assembly 400 under a first preset condition, and the adsorption assembly 200 can break adsorption with the valve plate assembly 400 under a second preset condition, so that the valve plate assembly 400 can realize lifting movement in the first accommodating chamber; the seal mount 300 may adjust a first predetermined gap 410 between the upper end surface of the valve plate assembly 400 and the lower end surface of the adsorption assembly 200.

Based on the above design, the fuel medium circulated by the fuel metering valve in the present embodiment may be natural gas, hydrogen fuel gas, or the like. When the fuel metering valve works normally, under a first preset condition, the adsorption assembly 200 can adsorb the valve plate assembly 400, so that a certain gap distance is formed between the valve plate assembly 400 and the sealing base 300, then the fuel medium can flow through the gap distance after flowing in from the feed hole 1201, then flow to the discharge hole 310, and finally flow into the cavity of the internal combustion engine. When under the second preset condition, the adsorption assembly 200 is disconnected from the valve plate assembly 400, so that the lower end surface of the valve plate assembly 400 can be sealed with the sealing base 300, the fuel medium is blocked from flowing to the discharge hole 310, and the sealing effect of the sealing base 300 and the valve plate assembly 400 on the first accommodating chamber is realized. The adsorption assembly 200 can adsorb the valve plate assembly 400 according to a certain regularity, for example, the adsorption assembly 200 can adsorb and break the adsorption valve plate assembly 400 according to a pulse current (such as sine wave and cosine wave) signal with a certain frequency, so that the fuel medium can enter the cavity of the internal combustion engine regularly, the vehicle controller is electrically connected with the adsorption assembly 200, controls the adsorption frequency and time of the adsorption assembly 200 to the valve plate assembly 400, and operates through certain data, so that the fuel medium can be accurately metered.

The static flow and dynamic flow of the fuel metering valve are important indicators of the performance of the product, the dynamic flow is adjusted based on the static flow, and the size of the first predetermined gap 410 directly affects the static flow of the product. As shown in fig. 4, 7-10, in the present embodiment, a first external thread 320 is disposed on a peripheral side surface of the sealing base 300, a first internal thread 1202 is disposed on an inner wall of the housing 100, and the first external thread 320 is connected to the first internal thread 1202, so that the sealing base 300 can adjust a first preset gap 410 between an upper end surface of the valve plate assembly 400 and a lower end surface of the suction assembly 200.

Specifically, when the operator installs the valve plate assembly 400 and the sealing base 300, the operator can screw the sealing base 300 to move the sealing base 300 relative to the housing 100, so that the valve plate assembly 400 on the sealing base 300 can move up and down, and thus the first preset gap 410 between the upper end surface of the valve plate assembly 400 and the lower end surface of the adsorbing assembly 200 can be adjusted. Then under first preset conditions, namely: the adsorption assembly 200 adsorbs the valve plate, and when the first predetermined gap 410 is 0, the static flow of the fuel metering valve is measured. In addition, when the static flow of the fuel metering valve deviates, an operator can repair the fuel metering valve by adjusting the size of the first preset gap 410, so that the rejection rate of products is reduced, and the cost is saved. When the measured static flow value is appropriate, in order to improve the stability and reliability of the sealing base 300 and the housing 100, the operator may also perform spot welding on the sealing base 300 and the housing 100, thereby avoiding the risk that the sealing base 300 falls off during the use. It should be emphasized that the static flow of the fuel metering valve is only adjusted during manufacturing, production and manufacture, and the customer end does not readjust the static flow after the product is sold after being molded, so that the threaded connection of the seal base 300 to the housing 100 and the welded connection of the seal base 300 to the housing 100 do not conflict with each other.

Compared with the prior art, the utility model provides a fuel metering valve, this fuel metering valve simple structure, spare part is small in quantity, can form the first holding chamber of relative seal through casing 100, seal base 300 and adsorption component 200, and assembly process is simple, improves fuel metering valve's manufacturing efficiency. The sealing base 300 can adjust a first preset gap 410 between the upper end face of the valve plate assembly 400 and the lower end face of the adsorption assembly 200, so that the static flow of the fuel metering valve can be adjusted, the consistency of the static flow is ensured, the rejection rate of products is reduced, and the purpose of saving cost is achieved.

As shown in fig. 9-10, in the present embodiment, the discharge hole 310 on the sealing base 300 is a polygonal inner hole. Illustratively, the discharge hole 310 may be a hexagonal inner hole, which facilitates an operator to screw the seal base 300 with a hexagonal wrench, so as to flexibly adjust the relative position of the seal base 300 and the housing 100, thereby improving the convenience of adjusting the first preset gap 410.

As shown in fig. 7-8, in the present embodiment, the valve plate assembly 400 is provided with a first through hole 420, one end of the first through hole 420 is communicated with the feeding hole 1201, and the other end of the first through hole 420 is communicated with the discharging hole 310. A second preset gap 210 is arranged between a part of the outer wall of the adsorption assembly 200 and a part of the inner wall of the casing 100, and the second preset gap 210 is communicated with the feeding hole 1201 and the first through hole 420. This enables the fuel medium to enter the second predetermined gap 210 from the inlet hole 1201, then enter the first through hole 420 from the second predetermined gap 210, and finally flow toward the outlet hole 310 after passing through the gap distance between the lower end surface of the valve plate assembly 400 and the sealing seat 300.

Illustratively, in the present embodiment, 6 first through holes 420 are arranged in an array along the axial direction of the valve plate assembly 400, and of course, the operator may arrange other numbers of first through holes 420 according to actual requirements, which is not limited in the present embodiment.

As shown in fig. 7 to 8, in the present embodiment, a first buffer member 430 is disposed on an upper end surface of the valve plate assembly 400, and a second buffer member 440 is embedded in a lower end surface of the valve plate assembly 400. The first buffer member 430 and the second buffer member 440 are arranged to reduce the rigid contact between the valve plate assembly 400 and the housing 100, and between the valve plate assembly 400 and the sealing base 300, and can also improve the sealing performance of the valve plate assembly 400, prolong the service life of the valve plate assembly 400 and save the cost. As shown in fig. 5 to 6 and 12, the suction assembly 200 of the present embodiment is provided with a third cushion member 220 on the lower end surface thereof, and the third cushion member 220 is provided to reduce the rigid contact between the valve plate assembly 400 and the suction assembly 200.

Further, as shown in fig. 9-10, a rib 330 is protruded on the upper end surface of the sealing base 300, and the rib 330 can abut against the second buffer 440. The provision of the ribs 330 is advantageous for improving the sealing performance of the sealing base 300. Specifically, when the second preset condition, that is, the adsorption component 200 is disconnected from the valve plate component 400, at this time, the rib 330 can be embedded in the second buffer member 440, so that the sealing base 300 seals the first accommodating chamber, thereby preventing the leakage of the fuel medium and improving the sealing performance of the product.

For example, in order to further improve the sealing performance between the sealing base 300 and the valve plate assembly 400, the number of the ribs 330 in this embodiment may be multiple, for example, 2, 3, etc., and the description thereof is omitted here.

As shown in fig. 3-4 and 11-12, in the present embodiment, the adsorption assembly 200 includes an armature 230, the armature 230 is connected to the housing 100, a bobbin 240 wound around an electromagnetic coil 250 is disposed on a peripheral side of the armature 230, the electromagnetic coil 250 is electrically connected to a vehicle controller, and the vehicle controller can control on/off of current of the electromagnetic coil 250, so that the armature 230 can have magnetism regularly, and thus the valve plate assembly 400 can be adsorbed. A plug pin 2501 extends from the electromagnetic coil 250, a second through hole 2301 is formed in the armature 230, one end of the plug pin 2501 is connected with the electromagnetic coil 250, and the other end of the plug pin 2501 is connected to a vehicle controller in an inserted mode. The valve plate assembly 400 of the present embodiment is made of ferromagnetic material, thereby facilitating the adsorption of the armature 230.

It should be noted that, in an actual production process, there may be a deviation in the installation position of the armature 230 and the housing 100, for example, there is a height difference between the lower end surface of the armature 230 and the lower end surface of the inner wall of the housing 100 along the height direction of the armature 230. Illustratively, when the lower end surface of the armature 230 is higher than the lower end surface of the inner wall of the housing 100, the first preset clearance 410 is the distance between the lower end surface of the armature 230 and the upper end surface of the valve plate assembly 400; when the lower end surface of the armature 230 is lower than the lower end surface of the inner wall of the housing 100, the first preset clearance 410 is the distance between the lower end surface of the inner wall of the housing 100 and the upper end surface of the valve plate assembly 400; that is, the first predetermined gap 410 can be adjusted by adjusting the seal base 300, so as to adjust the static flow of the fuel metering valve.

As shown in fig. 2 to fig. 4, in the present embodiment, the fuel metering valve includes an adjusting assembly 500, a mounting channel is disposed inside the armature 230, the adjusting assembly 500 is disposed in the mounting channel, an end of the adjusting assembly 500 abuts against the valve plate assembly 400, and the adjusting assembly 500 can adjust a pressure applied to the valve plate assembly 400, so as to adjust a dynamic flow rate of the fuel metering valve.

Further, as shown in fig. 2-4 and 14, the adjusting assembly 500 in the present embodiment includes an elastic member 510 and a cotter pin 520, and a fixed end of the elastic member 510 abuts against the valve plate assembly 400. The cotter 520 is connected with the installation channel in an interference fit manner, and along the height direction of the armature 230, the cotter 520 is arranged above the elastic member 510, and the end of the cotter 520 abuts against the free end of the elastic member 510, so that the elastic member 510 is in a compressed state. When an operator needs to adjust the dynamic flow of the fuel metering valve, the operator can use an additional tool (e.g., a push rod) to adjust the specific position of the split pin 520 in the mounting channel, so that the split pin 520 can press the elastic member 510, the pretightening force of the elastic member 510 is changed, the pretightening force can be transmitted to the valve plate assembly 400 by the elastic member 510, and the pressure of the elastic member 510 on the valve plate assembly 400 is changed. When in a first preset condition, the armature 230 adsorbs the valve plate assembly 400, so that the valve plate assembly 400 overcomes the pressure of the elastic member 510 on itself and is adsorbed by the armature 230, that is, the amount of expansion and contraction of the elastic member 510 is adjusted by the cotter pin 520, so that the elastic member 510 applies different pressures to the valve plate assembly 400 (in the vertical downward direction in fig. 4), and the adsorption force (in the vertical upward direction in fig. 4) of the armature 230 adsorbing the valve plate assembly 400 remains unchanged, so that the difference between the adsorption force and the pressure is changed, thereby changing the adsorption time of the armature 230 on the valve plate assembly 400, and further realizing the adjustment of the dynamic flow of the fuel metering valve.

Compared with the prior art, the utility model provides a fuel metering valve, this fuel metering valve simple structure, realize the regulation to fuel metering valve's dynamic flow through elastic component 510 and split pin 520, elastic component 510 and split pin 520 all need not to carry out fixed connection through welding process or riveting technology, thereby avoid among the prior art because the heat influence power that the welding produced or riveting lead to withstanding the position of the mounting of elastic component 510 and take place to remove, cause the risk that the pretightning force of elastic component 510 changes, and then influence the dynamic flow and adjust the degree of accuracy. The utility model discloses in realize the regulation to elastic component 510 pretightning force through nimble position of adjusting split pin 520, and then realize improving fuel metering valve's reliability and stability to dynamic flow's regulation, simplify the process steps, practice thrift the cost.

For example, the elastic member 510 of the present embodiment may be configured as a spring, the valve plate assembly 400 is opened with a stepped hole 450, and the mounting passage in the armature 230 is coaxially disposed with the stepped hole 450. The end of the elastic member 510 is embedded in the stepped hole 450, so that the stability and reliability of the elastic member 510 are improved, and the elastic member 510 is prevented from deviating.

As shown in fig. 5, 11-12, in the present embodiment, the armature 230 is provided with a third through hole 2302, one end of the third through hole 2302 is communicated with the second preset gap 210, the other end is communicated with the stepped hole 450, and the stepped hole 450 is communicated with the discharge hole 310, so that the fuel medium can enter the second preset gap 210 from the inlet 1201, and a part of the fuel medium can enter the first through hole 420 from the second preset gap 210, and finally flows to the discharge hole 310 after passing through the gap distance between the lower end surface of the valve plate assembly 400 and the sealing base 300; another portion of the fuel medium can enter the third through hole 2302 via the second predetermined gap 210, and then flow to the discharging hole 310 via the stepped hole 450. The opening of the third through hole 2302 in the armature 230 can increase the flow rate of the fuel medium, and the operator can set different numbers of the third through holes 2302 according to actual needs, which is not limited by the embodiment.

As shown in fig. 14, in the present embodiment, the split pin 520 includes a connecting portion 5201 and an abutting portion 5202, the connecting portion 5201 and the abutting portion 5202 are integrally formed, and the connecting portion 5201 is connected to the mounting channel by interference fit, and the abutting portion 5202 is connected to the mounting channel by clearance fit. Specifically, the abutting portion 5202 abuts on the end of the elastic member 510 away from the valve plate assembly 400, and the abutting portion 5202 is in clearance fit connection with the mounting passage, which can facilitate the abutting portion 5202 to drive the elastic member 510 so that the amount of expansion and contraction of the elastic member 510 changes.

Further, the cotter 520 is opened with a first opening 5203, and the first opening 5203 penetrates the connecting portion 5201 and the abutting portion 5202 in the height direction of the cotter 520. The arrangement of the first opening 5203 is beneficial to the assembly of the split pin 520, that is, when the connecting portion 5201 of the split pin 520 is in interference fit with the mounting channel, the first opening 5203 is slightly deformed and reduced, so that the split pin 520 is embedded in the mounting channel, and the interference fit connection is realized.

As shown in fig. 13, in the present embodiment, the fuel metering valve further includes a seal rod 600, the seal rod 600 being disposed in the mounting passage, the seal rod 600 being detachably connected to the armature 230. The provision of the seal rod 600 facilitates sealing of the installation passage, preventing leakage of the fuel medium. Further, a second external thread is arranged on the sealing rod 600, a second internal thread is arranged on the inner wall of the mounting channel, and the second external thread is connected with the second internal thread. Thus, later-period operators can replace and detach the sealing rod 600 conveniently, and the fuel metering valve can be repaired or analyzed timely.

In order to facilitate the installation of the sealing rod 600, the sealing rod 600 in the present embodiment is provided with a polygonal counter bore 610, which may be, for example, a hexagonal counter bore, so that an operator can conveniently screw the sealing rod 600 with a hexagonal wrench, thereby improving the convenience of connecting the sealing rod 600 with the armature 230 and improving the assembly and later-stage disassembly efficiency.

With reference to fig. 2 to fig. 5, the sealing base 300 of the present embodiment is provided with a first mounting portion 340, and the first mounting portion 340 is provided with a first sealing ring 350, so as to improve the sealing performance between the sealing base 300 and the casing 100 and prevent the fuel medium from leaking. A second sealing ring 2401 is arranged between the coil skeleton 240 and the casing 100, so that the sealing performance between the casing 100 and the coil skeleton 240 is improved. A third sealing ring 2402 is arranged between the coil framework 240 and the armature 230, so that the sealing performance of the armature 230 and the coil framework 240 is improved. A fourth sealing ring 620 is arranged between the sealing rod 600 and the armature 230, so that the sealing performance of the sealing rod 600 and the armature 230 is improved.

Since the fuel metering valve of the present embodiment is usually installed and placed in a valve seat (not shown in the drawings) of an internal combustion engine, in order to improve the air tightness between the fuel metering valve and the valve seat, as shown in fig. 4, a fifth sealing ring 1101 is disposed between the housing 100 and the valve seat, and a sixth sealing ring 360 is disposed between the sealing base 300 and the valve seat, so as to improve the sealing performance between the fuel metering valve and the valve seat and prevent the fuel medium from leaking.

As shown in fig. 3, 15-18, in the present embodiment, the housing 100 includes a first housing 110 and a second housing 120, the first housing 110 and the second housing 120 are fixedly connected, the first housing 110 is connected to the suction assembly 200, and the second housing 120 is connected to the sealing base 300. By dividing the housing 100 into the first housing 110 and the second housing 120, the processing difficulty is reduced, the processing efficiency is improved, and the cost is saved.

Further, a connection pin 1102 extends from one end of the first housing 110 close to the second housing 120, a first protrusion 1203 is convexly disposed at one end of the second housing 120 close to the first housing 110, and the connection pin 1102 is connected with the first protrusion 1203, optionally, the connection pin 1102 is connected with the first protrusion 1203 in a welding manner, so as to improve reliability and stability of the first housing 110 and the second housing 120.

Further, the connection pin 1102 and the first housing 110 in this embodiment form a first recess 1103, and a portion of the first protrusion 1203 is disposed in the first recess 1103 and connected with the connection pin 1102. The arrangement of the first concave portion 1103 can improve the connection contact area between the first convex portion 1203 and the first housing 110, thereby improving the connection stability.

Still further, in the embodiment, the end portion of the connection pin 1102 away from the first housing 110 extends to form a riveting portion 1104, the riveting portion 1104 is bent toward the axis direction of the first housing 110, and optionally, the riveting portion 1104 is subjected to circumferential riveting, so that the second housing 120 can be protected doubly, the phenomenon that the second housing 120 and the first housing 110 slide off relatively is avoided, and the reliability and stability of the first housing 110 and the second housing 120 are improved.

As shown in fig. 5, 15 to 18, in the present embodiment, the fuel metering valve includes a filter screen 700, a second protruding portion 1204 is provided convexly on the outer peripheral side of the second housing 120, a second recessed portion 1105 is provided concavely on the first housing 110, one end of the filter screen 700 is connected to the second protruding portion 1204, and the other end of the filter screen 700 is connected to the second recessed portion 1105. Alternatively, the filter screen 700 of the present embodiment may be clamped on the first housing 110 and the second housing 120 in a clamping manner. The arrangement of the second protruding portion 1204 and the second recessed portion 1105 can improve the stability and reliability of the filter screen 700, and prevent the filter screen 700 from falling off.

As shown in fig. 1 to 3, in the present embodiment, the fuel metering valve includes a cover 800, and the first housing 110 is screwed to the cover 800, so as to facilitate later maintenance and repair. A pin 2501 on the solenoid 250 passes through the cover 800 and is plugged into the vehicle controller.

Further, with continued reference to fig. 1-3, the fuel metering valve of the present embodiment includes a dust cap 900, and the dust cap 900 covers the cover body 800. The dust cap 900 can be covered on the cap body 800 in a threaded connection manner or a clamping connection manner, and the dust cap 900 can prevent external dust or other foreign matters from entering the fuel metering valve, so that the reliability and the stability of the fuel metering valve are improved. The dust cover 900 in this embodiment may be made of engineering plastics or metal.

It is to be understood that the foregoing is only illustrative of the presently preferred embodiments of the present invention and that the present invention applies equally to other embodiments. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

It is noted that throughout the description of the present specification, references to "some embodiments," "other embodiments," or the like, are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims (10)

1. A fuel metering valve, comprising:

the device comprises a shell, a feed port is formed in the shell, and an adsorption assembly is arranged in the shell;

the sealing base is movably connected with the shell, the sealing base, the shell and the adsorption assembly jointly enclose a first accommodating chamber, and the feed hole is communicated with the first accommodating chamber; a discharge hole is formed in the sealing base, one end of the discharge hole is communicated with the first accommodating chamber, and the other end of the discharge hole is communicated with a cavity of the internal combustion engine;

a valve plate assembly movably disposed in the first containment chamber;

the adsorption component is internally provided with an installation channel, the adsorption component can adsorb the valve plate component under a first preset condition, and the adsorption component can break adsorption with the valve plate component under a second preset condition, so that the valve plate component can realize lifting motion in the first accommodating chamber;

the adjusting assembly is arranged in the mounting channel and comprises an elastic piece and a split pin, the fixed end of the elastic piece abuts against the valve plate assembly, and the end of the split pin abuts against the free end of the elastic piece, so that the elastic piece is in a compression state.

2. The fuel metering valve of claim 1, wherein the split pin is connected with the mounting passage in an interference fit, and the split pin is disposed above the elastic member in a height direction of the adsorption assembly.

3. The fuel metering valve of claim 2, wherein the split pin includes a connecting portion and an abutment portion, the connecting portion and the abutment portion being integrally formed and being connected in an interference fit with the mounting channel, the abutment portion being connected in a clearance fit with the mounting channel.

4. A fuel metering valve as claimed in claim 3 wherein a first opening is provided in said split pin, said first opening extending through said connecting portion and said abutment portion in a height direction of said split pin.

5. A fuel metering valve as claimed in claim 1 wherein said valve plate assembly defines a stepped bore, said mounting passage being disposed coaxially with said stepped bore, and a fixed end of said resilient member abutting said stepped bore.

6. The fuel metering valve of claim 1 further comprising a seal stem disposed in the mounting channel, the seal stem being removably connected to the adsorbent assembly.

7. A fuel metering valve as claimed in claim 6 wherein said seal stem is provided with a second external thread and said mounting passage is provided with a second internal thread on an inner wall thereof, said second external thread being connected to said second internal thread.

8. A fuel metering valve as claimed in claim 7 wherein said seal stem is provided with a polygonal counter bore.

9. A fuel metering valve as claimed in claim 1 wherein said adsorption assembly includes an armature connected to said housing, said armature having a bobbin around which an electromagnetic coil is wound, said electromagnetic coil being electrically connected to a vehicle controller, said vehicle controller being capable of controlling the electrical current to said electromagnetic coil.

10. A fuel metering valve as set forth in claim 9 wherein a pin extends from said solenoid, a second through hole is provided in said armature, one end of said pin is connected to said solenoid, and the other end of said pin is plugged into said vehicle controller.

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