Easily-corroded fuel injection valve

Abstract

According to the easy-to-corrode fuel engine injection valve, on one hand, the corrosion path of easy-to-corrode fuel such as methyl alcohol and ammonia to electromagnetic materials is blocked, and on the other hand, the injection process of the easy-to-corrode fuel such as methyl alcohol and ammonia in an air inlet channel is achieved through the injection valve. The easy-to-corrode fuel injection valve comprises an upper valve shell, a lower valve shell, an electromagnetic valve assembly, a range limiting disc, a valve plate and a valve seat, an oil groove surrounding an armature of the electromagnetic valve assembly is formed in an inner channel of the range limiting disc. High-pressure lubricating oil enters through high-pressure lubricating oil channels formed in the lower valve shell and the range limiting disc and then fills the oil groove. Easily-corrosive fuel enters a fuel pressure storage cavity of the lower valve shell through a fuel inlet of the lower valve shell, when the electromagnetic valve assembly is powered on, an armature of the electromagnetic valve assembly can drive a valve plate to be opened, and the easily-corrosive fuel in the fuel pressure storage cavity flows to a valve hole of a valve seat through an opening in a range limiting disc and then is sprayed outwards; and after the electromagnetic valve assembly is powered off, the valve plate is seated, the valve plate blocks the valve hole of the valve seat, and the spraying process of the easily-corroded fuel is completed.

Description

Technical Field

[0001] The utility model belongs to the technical field of new fuel engines, and in particular relates to a corrosive fuel injection valve. Background Art

[0002] Methanol fuel is considered as a better alternative energy source to traditional internal combustion engine fuels diesel and gasoline because of its low carbon characteristics, abundant reserves and low price. However, due to the low flash point, corrosiveness and toxicity of methanol, it is difficult to adapt to the existing injection system. Ammonia fuel has the characteristics of zero carbon. Ammonia is a nitrogen-hydrogen compound that can be synthesized artificially. It is cheap and easy to obtain, volatile, easy to store and transport, has a suitable combustion value, high octane number, relatively safe operation, and is compatible with general fuels. However, ammonia has a strong pungent odor and is slightly toxic. It will only be fatal when the concentration reaches 1000 times the detectable concentration. Ammonia is corrosive and will corrode some metals, such as copper, silver, tin, zinc and their alloys. Therefore, it is very necessary to develop a targeted injection valve for methanol and ammonia as fuel. On the one hand, it blocks the corrosion path of easily corrosive fuels such as methanol and ammonia to electromagnetic materials. On the other hand, the injection valve realizes the injection process of easily corrosive fuels such as methanol and ammonia in the intake duct. Utility Model Content

[0003] The utility model provides an injection valve for an engine of easily corrosive fuels, which, on one hand, blocks the corrosion path of easily corrosive fuels such as methanol and ammonia to electromagnetic materials, and on the other hand, realizes the injection process of easily corrosive fuels such as methanol and ammonia in the intake duct.

[0004] The technical solution of the utility model is:

[0005] The utility model provides a fuel injection valve that is easy to corrode, comprising: an upper valve housing, a lower valve housing, a solenoid valve assembly, a travel limiter, a valve plate and a valve seat;

[0006] The solenoid valve assembly is arranged in a cavity formed by the upper valve housing and the lower valve housing;

[0007] The travel limit disc and the valve seat are installed inside the lower valve housing;

[0008] The valve plate is installed in a first installation cavity opened by the travel limit disc facing the valve seat;

[0009] The armature of the solenoid valve assembly passes through the internal channel of the limit disc and is fixedly connected to the valve plate;

[0010] An oil groove is arranged around the armature of the solenoid valve assembly on the internal channel of the limiter disc; high-pressure lubricating oil enters through the lower valve housing and the high-pressure lubricating oil passage arranged on the limiter disc, and then fills the oil groove;

[0011] The corrosive fuel enters the fuel pressure accumulation chamber of the lower valve housing through the fuel inlet of the lower valve housing. When the solenoid valve assembly is energized, its armature drives the valve plate to open, and the corrosive fuel in the fuel pressure accumulation chamber flows to the valve hole of the valve seat through the opening on the limit plate, and then is ejected outward.

[0012] After the solenoid valve assembly loses power, the valve plate falls into its seat, and the valve plate blocks the valve hole of the valve seat, thereby completing the injection process of the corrosive fuel.

[0013] Preferably, the corrosive fuel injection valve further comprises:

[0014] a spring arranged in a second mounting cavity provided on the travel limiter, the second mounting cavity being adjacent to the first mounting cavity, the spring being connected between the travel limiter and the valve plate;

[0015] When the solenoid valve assembly loses power, the spring in a compressed state pushes the valve plate to seat.

[0016] Preferably, the valve seat is further provided with a groove;

[0017] A portion of the easily corrosive fuel in the fuel pressure accumulator cavity flows to the valve hole of the valve seat through the opening on the limit plate;

[0018] Another part of the easily corrosive fuel in the fuel pressure accumulation chamber flows to the valve hole of the valve seat through the groove.

[0019] Preferably, the armature of the solenoid valve assembly is fixed to the valve plate by connecting screws.

[0020] Preferably, the limit-range disk abuts against the valve seat, and an opening connected to the first installation cavity is formed on the outer wall of the limit-range disk.

[0021] Preferably, a cable gland is installed on the upper valve housing, and the cable gland connects the external cable to the solenoid valve assembly.

[0022] Preferably, the upper valve housing and the lower valve housing are connected by hexagon socket head screws.

[0023] Preferably, a limit ring is further installed in the lower valve housing, the upper end of the limit ring abuts against the upper valve housing and the solenoid valve of the solenoid valve assembly, and the lower end of the limit ring abuts against the limit disk.

[0024] Preferably, the lower valve housing has a hole formed in it to form a first high-pressure oil passage, the limiter disc has a hole formed in it to form a second high-pressure oil passage, and the first high-pressure oil passage, the second high-pressure oil passage, and the high-pressure annular oil groove are connected;

[0025] The cross-sectional area of ​​the first high-pressure oil passage is greater than the cross-sectional area of ​​the second high-pressure passage.

[0026] The beneficial effects of the utility model are:

[0027] Corrosive fuels such as methanol and ammonia enter the fuel pressure storage chamber and the first installation chamber from the inlet of the lower valve housing; when the corrosive fuel leaks, the corrosive fuel flows upward from the gap between the limit plate and the armature to the oil tank. Since the oil tank is filled with high-pressure lubricating oil, the high-pressure lubricating oil blocks the corrosive fuel from continuing to move upward, thus protecting the solenoid valve assembly. When the solenoid valve assembly is energized to generate a magnetic field, the armature moves upward under the action of the magnetic field, and the valve plate opens under the action of the armature. The corrosive fuel in the fuel pressure storage chamber flows through the opening of the valve plate, passes through the valve hole of the valve seat and enters the intake duct, realizing injection into the intake duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is one of the internal cross-sectional views of the injection valve of the embodiment of the utility model;

[0029] Figure 2 This is the second internal cross-sectional view of the injection valve according to the embodiment of the utility model;

[0030] Figure 3 A cross-sectional view of a travel limiter disk according to an embodiment of the present utility model;

[0031] Figure 4 This is a cross-sectional view of the lower valve housing of an embodiment of the utility model;

[0032] Figure 5 A schematic diagram of a valve seat according to an embodiment of the utility model;

[0033] Description of reference numerals:

[0034] 1—cable; 2—upper valve housing; 3—gland; 4—solenoid valve assembly; 51—armature; 6—limiting ring; 7—limiting disk; 701—second high-pressure oil channel; 702—oil tank; 703—first installation cavity; 704—opening; 8—sealing plug; 9—lower valve housing; 901—first high-pressure oil channel; 902—fuel inlet; 10—valve plate; 11—valve seat; 111—valve hole; 112—slot; 12—first O-ring; 13—second O-ring; 14—third O-ring; 15—connecting screw; 16—spring; 17—fourth O-ring. DETAILED DESCRIPTION

[0035] The following is a summary of the attached drawings and Figure 1-5 The utility model is further described.

[0036] like Figure 1 , Figure 2As shown, the utility model provides an injection valve for an intake duct of a fuel that is prone to corrosion, including a cable 1, an upper valve housing 2, a gland 3, a lower valve housing 9, a solenoid valve assembly 4, an armature 5, a limiter disc 7, a spring 16, a connecting screw 15, a valve plate 10, a valve seat 11 and other parts.

[0037] The upper valve housing 2 and the lower valve housing 9 are connected by hexagon socket head screws, the end of the upper valve housing 2 extends into the lower valve housing 9, and a fourth O-ring 17 is arranged between the upper valve housing 2 and the lower valve housing 9.

[0038] A first O-ring 12 and a third O-ring 14 are disposed on the outer side of the lower valve housing 9 .

[0039] Combination Figure 1 and 2 From the perspective of FIG. 1 , the solenoid valve assembly 4 is arranged in a cavity formed by the upper valve housing 2 and the lower valve housing 9 .

[0040] The travel limit disc 7 and the valve seat 11 are installed inside the lower valve housing 18; the valve plate 10 is installed in the first installation cavity 703 opened by the travel limit disc 7 facing the valve seat 11. A second O-ring 13 is arranged between the valve seat 11 and the lower valve housing 18.

[0041] The armature 5 of the solenoid valve assembly 4 passes through the internal channel of the limit disk 7 and is fixedly connected to the valve plate 10. The armature 5 and the internal channel of the limit disk 7 have a clearance fit, and the clearance size is between 0.004-0.008 mm.

[0042] like Figure 3 , Figure 4 , Figure 5 As shown, an oil groove 702 arranged around the armature 5 of the solenoid valve assembly 4 is provided on the internal channel of the limit disc 7; high-pressure lubricating oil enters through the lower valve housing 9 and the high-pressure lubricating oil channel arranged on the limit disc 7, and then fills the oil groove 702.

[0043] Specifically, if Figure 3 and 4 A hole is opened in the lower valve housing 9 to form a first high-pressure oil passage 901, and the process hole of the first high-pressure oil passage 901 is blocked by a sealing plug 8; a hole is opened in the limit plate 7 to form a second high-pressure oil passage 701, and an oil groove 702 arranged around the armature 5 is arranged in the internal channel of the limit plate 7; the oil groove 702 of the limit plate 7 blocks the corrosive fuel in the first installation cavity 703 from leaking to the solenoid valve assembly 4, thereby solving the problem of corrosive fuel gap leakage.

[0044] The first high-pressure oil channel 901, the second high-pressure oil channel 701 and the high-pressure annular oil groove 702 are connected. The cross-sectional area of ​​the first high-pressure oil channel 901 is larger than that of the second high-pressure channel 701, which can ensure that there is no throttling problem in the flow channel of the high-pressure oil.

[0045] like Figure 2 The spring 16 is arranged in a second installation cavity opened on the limit-range disk 7 , the second installation cavity is adjacent to the first installation cavity 703 , and the spring 16 is connected between the limit-range disk 7 and the valve plate 10 .

[0046] In this embodiment, the opening and closing process is realized by using the magnetic field of the solenoid valve assembly 4 and the preset compression amount of the spring 16. When the solenoid valve assembly 4 loses power, the spring 16 in a compressed state pushes the valve plate 10 to seat, and after the valve plate 10 seats, the fuel does not leak in the valve hole 111.

[0047] like Figure 4 and 5 , the corrosive fuel enters the fuel pressure accumulation chamber of the lower valve housing 9 through the fuel inlet 902 of the lower valve housing 9, and the valve seat 11 is also provided with a slot 112; a part of the corrosive fuel in the fuel pressure accumulation chamber flows to the valve hole 111 of the valve seat 11 through the opening 704 on the limit plate 7; another part of the corrosive fuel in the fuel pressure accumulation chamber flows to the valve hole 111 of the valve seat 11 through the slot 112. The slot 112 provided on the valve seat 11 increases the amount of corrosive fuel entering the valve hole 111 of the valve seat 11, thereby enhancing the injection effect.

[0048] The armature 5 of the solenoid valve assembly 4 is fixed to the valve plate 10 via a connecting screw 15 , and the connecting screw 15 , the armature 5 and the valve plate 10 are combined into an internal moving part.

[0049] The limit disc 7 and the valve seat 11 are in contact with each other, and an opening connected to the first installation cavity 703 is formed on the outer wall of the limit disc 7 .

[0050] like Figure 2 The upper end of the limit ring 6 abuts against the upper valve housing 2 and the solenoid valve 5 of the solenoid valve assembly 4 , and the lower end of the limit ring 6 abuts against the limit disk 7 .

[0051] like Figure 5 As shown, the valve seat 11 is provided with a valve hole 111, and the valve seat 11 is fixed on the lower valve housing 9. Corrosive fuels such as methanol and ammonia fill the fuel pressure accumulation chamber from the inlet of the lower valve housing 9. The valve plate 10 is opened, and the corrosive fuel in the fuel pressure accumulation chamber enters through the opening 704 and is then ejected from the valve hole 111.

[0052] When the electromagnetic valve assembly 4 is powered off, the magnetic field disappears, and under the rebound force of the spring 16, the valve plate 10 is seated, the easily corrosive fuel is cut off, and the easily corrosive fuel completes the injection process in the intake duct.

[0053] The corrosive fuel injection valve of the utility model utilizes the communication between the first high-pressure lubricating oil passage 901, the second high-pressure lubricating oil passage 701 and the oil groove 702. The high-pressure lubricating oil filled in the oil groove 702 can block the corrosive fuel in the first installation cavity 703 from leaking to the solenoid valve assembly 4. The opening and closing of the motion assembly and the valve seat 11 is utilized to realize the control of the fuel injection process.

[0054] The above-mentioned corrosive fuel injection valve of this embodiment has the following effects:

[0055] 1. The connecting screw 15 connects the armature 5 and the valve plate 10 to form a moving assembly. The moving assembly and the armature 5 are clearance-matched, and the clearance size will not cause the moving assembly to get stuck.

[0056] 2. The high-pressure lubricating oil pipe is connected to the first high-pressure lubricating oil passage 901 of the lower valve housing 9. Since the first high-pressure lubricating oil passage 901 is connected with the second high-pressure lubricating oil passage 701 and the oil groove 702 on the limit plate 7 in sequence, the high-pressure lubricating oil is finally filled in the oil groove 702. When the corrosive fuel leaks, the corrosive fuel flows upward from the gap between the limit plate 7 and the armature 5 to the oil groove 702. Since the oil groove 702 is filled with high-pressure lubricating oil, the high-pressure lubricating oil blocks the corrosive fuel from continuing to flow upward, thus protecting the solenoid valve assembly 4. In addition, since the cross-sectional area of ​​the first high-pressure lubricating oil passage 901 is larger than that of the second high-pressure passage 701, it is ensured that there is no throttling of the high-pressure lubricating oil in the flow passage, and the high-pressure lubricating oil in the oil groove 702 cuts off the gap fuel.

[0057] 3. The electromagnetic valve assembly 4 is powered on to generate a magnetic field. The armature 5 moves upward under the action of the magnetic field, the valve plate 10 opens, and the corrosive fuel flows through the opening of the valve plate 10 and enters the intake duct through the valve hole 111 of the valve seat 11. The electromagnetic valve assembly 4 is powered off, the magnetic field disappears, and the valve plate 10 is seated under the action of the spring 16, the corrosive fuel is cut off, and the corrosive fuel completes the injection process in the intake duct.

[0058] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A corrosive fuel injection valve, characterized in that: include: Upper valve housing, lower valve housing, solenoid valve assembly, travel limiter, valve plate and valve seat; The solenoid valve assembly is arranged in a cavity formed by the upper valve housing and the lower valve housing; The travel limit disc and the valve seat are installed inside the lower valve housing; The valve plate is installed in a first installation cavity opened by the travel limit disc facing the valve seat; The armature of the solenoid valve assembly passes through the internal channel of the limit disc and is fixedly connected to the valve plate; An oil groove is arranged around the armature of the solenoid valve assembly on the internal channel of the limiter disc; high-pressure lubricating oil enters through the lower valve housing and the high-pressure lubricating oil passage arranged on the limiter disc, and then fills the oil groove; The corrosive fuel enters the fuel pressure accumulation chamber of the lower valve housing through the fuel inlet of the lower valve housing. When the solenoid valve assembly is energized, its armature drives the valve plate to open, and the corrosive fuel in the fuel pressure accumulation chamber flows to the valve hole of the valve seat through the opening on the limit plate, and then is ejected outward. After the solenoid valve assembly loses power, the valve plate falls into its seat, and the valve plate blocks the valve hole of the valve seat, thereby completing the injection process of the corrosive fuel.

2. The corrosion-prone fuel injection valve according to claim 1, characterized in that: The corrosive fuel injection valve further comprises: a spring arranged in a second mounting cavity provided on the travel limiter, the second mounting cavity being adjacent to the first mounting cavity, the spring being connected between the travel limiter and the valve plate; When the solenoid valve assembly loses power, the spring in a compressed state pushes the valve plate to seat.

3. The corrosion-prone fuel injection valve according to claim 1, characterized in that: The valve seat is also provided with a groove; A portion of the easily corrosive fuel in the fuel pressure accumulator cavity flows to the valve hole of the valve seat through the opening on the limit plate; Another part of the easily corrosive fuel in the fuel pressure accumulation chamber flows to the valve hole of the valve seat through the groove.

4. The corrosion-prone fuel injection valve according to claim 1, characterized in that: The armature of the solenoid valve assembly is fixed to the valve plate via connecting screws.

5. The corrosion-prone fuel injection valve according to claim 1, characterized in that: The limit disc abuts against the valve seat, and an opening connected to the first installation cavity is formed on the outer wall of the limit disc.

6. The corrosion-prone fuel injection valve according to claim 1, characterized in that: A cable gland is installed on the upper valve housing, and the cable gland connects the external cable to the solenoid valve assembly.

7. The corrosion-prone fuel injection valve according to claim 1, characterized in that: The upper valve housing and the lower valve housing are connected by hexagon socket head screws.

8. The corrosion-prone fuel injection valve according to claim 1, characterized in that: A limit ring is also installed in the lower valve housing, the upper end of the limit ring abuts against the upper valve housing and the solenoid valve of the solenoid valve assembly, and the lower end of the limit ring abuts against the limit disk.

9. The corrosion-prone fuel injection valve according to claim 1, characterized in that: The lower valve housing has a hole formed in it to form a first high-pressure oil passage, the limiter disc has a hole formed in it to form a second high-pressure oil passage, and the first high-pressure oil passage, the second high-pressure oil passage, and the high-pressure annular oil groove are connected; The cross-sectional area of ​​the first high-pressure oil passage is greater than the cross-sectional area of ​​the second high-pressure passage.

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