In-cylinder direct injection hydrogen nozzle

Abstract

The utility model discloses an in-cylinder direct injection hydrogen nozzle which is used for providing hydrogen into a combustion chamber and comprises a shell internally provided with a conveying channel, an electromagnetic assembly, a valve element assembly and an opening and closing assembly, and the valve element assembly and the opening and closing assembly are arranged in the channel. The valve element assembly comprises a fixed iron core, a valve seat and a movable assembly connected with the fixed iron core and the shell in a sliding mode, and the electromagnetic assembly can control the movable assembly to open or close the conveying channel. An adjusting assembly used for controlling the opening pressure of the movable assembly is arranged between the fixed iron core and the shell. And the opening and closing assembly is located at the tail end of the valve element assembly and used for opening or closing the shell so that hydrogen can be sprayed out of the shell. The opening pressure for opening the injection opening can be adjusted through the opening and closing assembly, then the requirements for different injection pressures are met, the compression amount of the first elastic piece is controlled by adjusting the position of the pressing ring, then the opening pressure of the valve rod is adjusted, the corresponding opening and closing speed can be adjusted, and the injection pressure and the injection amount are more accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to the nozzle technical field, and particularly relates to a cylinder direct injection hydrogen nozzle. BACKGROUND

[0002] The general hydrogen injector mainly works as follows: when the hydrogen injector is powered, the electromagnetic coil generates electromagnetic force to attract the armature to overcome the spring force, friction and other opening resistance, drive the valve core assembly to open the valve seat, and the hydrogen enters the hydrogen internal combustion engine through the hydrogen injector; when the power is off, the electromagnetic force disappears, the armature is reset under the action of the reset spring, and the valve core assembly closes the valve seat; however, the existing cylinder direct injection hydrogen injector has single injection pressure, and it is difficult to realize different injection pressure requirements of the injector. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the present application provides a cylinder direct injection hydrogen nozzle, which can adjust the opening pressure and opening response speed of the nozzle, and further realize the requirement of different injection pressures, and has small movement friction resistance, and adopts the following technical scheme:

[0004] The cylinder direct injection hydrogen nozzle is used for providing hydrogen into a combustion chamber, and comprises a shell provided with a conveying channel, an electromagnetic assembly, a valve core assembly and an opening and closing assembly arranged in the conveying channel.

[0005] The valve core assembly comprises a fixed iron core, a valve seat and a movable assembly slidably connected with the fixed iron core and the shell, and the electromagnetic assembly can control the movable assembly to open or close the conveying channel.

[0006] The fixed iron core and the shell are provided with an adjusting assembly for controlling the opening pressure of the movable assembly.

[0007] The opening and closing assembly is arranged at the end of the valve core assembly, and is used for opening or closing the shell to spray hydrogen out of the shell.

[0008] Preferably, the opening and closing assembly comprises a valve rod, a pressure ring and a stop ring sleeved outside the valve rod, an elastic member one is arranged between the pressure ring and the stop ring, and the pressure ring is used for adjusting the compression amount of the elastic member one to control the opening response speed and pressure of the valve rod.

[0009] Preferably, a gap is left between the movable assembly and the fixed iron core and the shell, and a sealing ring is further arranged on the movable assembly and abuts against the fixed iron core and the shell.

[0010] Preferably, the movable assembly comprises a support seat slidably connected with the fixed iron core and a valve core slidably connected with the shell, and the support seat is connected with the armature.

[0011] Preferably, the adjusting assembly comprises an adjusting part for adjusting the compression amount of the elastic member II to control the opening pressure of the delivery channel.

[0012] Further preferably, the valve rod is provided with a sealing part at one end, which is arranged outside the housing and used to abut against the housing to close the delivery channel.

[0013] Further preferably, the compression ring and the blocking ring are both provided with a plurality of flow-through holes.

[0014] Further preferably, the valve core, the housing and the valve seat form a containing cavity, the support seat, the armature and the valve core are all provided with flow channels, and the valve core is provided with a plurality of connecting holes for connecting the flow channels and the containing cavity.

[0015] Preferably, the housing is provided with an air inlet and a jetting port for connecting the delivery channel, and the jetting port is connected to the combustion chamber.

[0016] Further preferably, the application further comprises a flow guiding part provided with at least one flow guiding hole, which is arranged on the housing and used to guide the jetting direction of hydrogen.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] (1) The opening pressure of the valve core assembly can be adjusted by the adjusting assembly, the compression amount of the elastic member II is controlled by the adjusting part, and then the opening pressure of the delivery channel is adjusted, the hydrogen pushes the opening and closing assembly to open and jet out of the housing, the jetting pressure of hydrogen can be accurately controlled, and the demand for different jetting pressures can be met.

[0019] (2) The compression amount of the elastic member I is controlled by the compression ring of the opening and closing assembly, and then the opening and closing assembly can adjust the opening response speed and pressure of the opening and closing assembly to open the housing, and the jetting amount can be accurately controlled.

[0020] (3) The movable assembly, the fixed core and the housing are all left with gaps and do not contact each other, the sealing ring arranged on the movable assembly abuts against the fixed core and the housing, the contact area between the movable assembly and the fixed core and the housing is reduced, the frictional resistance during movement is reduced, and the corresponding speed of the valve core assembly is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a schematic view of the internal structure of the application;

[0022] Fig. 2 is a schematic view of the internal structure of the application;

[0023] Fig. 3 is a schematic view of the valve core structure of the application.

[0024] In the picture:

[0025] 1. Shell;

[0026] 2. Valve core assembly, 21. Fixed iron core, 22. Valve seat, 23. Movable component, 23.1. Support base, 23.2. Valve core, 23.3. Armature;

[0027] 3. Opening and closing assembly; 31. Valve stem; 310. Sealing part; 32. Retaining ring; 33. Elastic element one; 34. Pressure ring; 35. Flow hole;

[0028] 4. Electromagnetic components; 5. Sealing ring;

[0029] 6. Adjustment components, 6.1. Adjustment part, 6.2. Elastic element two;

[0030] 7. Drainage section; 8. Receiving cavity; 80. Connecting hole; 9. Flow channel;

[0031] 10. Conveying channel; 10.1. Air inlet; 10.2. Injection port; 100. Gap. Detailed Implementation

[0032] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] See Figs. 1 to 3 To further elaborate on this application:

[0034] A direct-injection hydrogen nozzle for supplying hydrogen to a combustion chamber includes a housing 1 with an internal delivery channel 10 and an electromagnetic component 4; hydrogen flows in the delivery channel 10, and the housing 1 is provided with an inlet 10.1 and an injection port 10.2 communicating with the delivery channel 10, the injection port 10.2 communicating with the combustion chamber;

[0035] The conveying channel 10 is provided with a valve core assembly 2, which includes a fixed iron core 21 and a hollow valve seat 22, as well as a movable component 23 that slides between the fixed iron core 21 and the housing 1. The electromagnetic component 4 is used to control the movable component 23 to open or close the conveying channel 10.

[0036] The fixed iron core 21 and the shell 1 are provided with an adjusting assembly 6 for controlling the opening pressure of the movable assembly 23; wherein the adjusting assembly 6 comprises an adjusting part 6.1, and a second elastic member 6.2 provided between the adjusting part 6.1 and the movable assembly 23, and the second elastic member 6.2 is a spring; the second elastic member 6.2 helps the movable assembly 23 reset, the adjusting part 6.1 is used for adjusting the compression amount of the second elastic member 6.2, thereby controlling the opening pressure of the valve core assembly 2, thereby meeting the demand of different injection pressures.

[0037] An opening and closing assembly 3 is located at the end of the valve core assembly 2, which is used to open or close the injection port 10.2, and adjust and control the opening corresponding speed and opening pressure of the injection port 10.2. In this embodiment, the medium for injection is hydrogen, of course, it can also be fuel or other gas medium.

[0038] In this embodiment, the opening and closing assembly 3 comprises a valve rod 31, a pressing ring 34 and a blocking ring 32 sleeved outside the valve rod 31, a first elastic member 33 is provided between the pressing ring 34 and the blocking ring 32, and the pressing ring 34 is used to adjust the compression amount of the first elastic member 33 to control the opening pressure of the valve rod 31. Wherein, the pressing ring 34 can control the compression amount of the first elastic member 33 by adjusting its position on the valve rod 31, and the pressing ring 34 can be connected on the valve rod 31 by screw thread.

[0039] The pressing ring 34 and the blocking ring 32 are both distributed with a plurality of flow-through holes 35 for hydrogen to flow in the delivery channel 10. When the opening and closing assembly 3 reaches the opening pressure, hydrogen flows to the side of the injection port 10.2 through the delivery channel 10 and the flow-through holes 35.

[0040] Under normal circumstances, the opening and closing assembly 3 closes the injection port 10.2, when the valve core assembly 2 is opened, hydrogen flows to the injection port 10.2, when the pressure is greater than the opening pressure of the opening and closing assembly 3, the injection port 10.2 is opened to inject hydrogen into the combustion chamber; the first elastic member is a spring.

[0041] When the compression amount of the first elastic member 33 increases, the opening corresponding speed of the valve rod 31 is slower; when the compression amount of the first elastic member 33 decreases, the opening corresponding speed of the valve rod 31 is faster, by adjusting the compression amount of the first elastic member 33, the opening corresponding speed of the valve rod 31 is controlled.

[0042] In this embodiment, the movable assembly 23 comprises a support seat 23.1 slidably connected with the fixed iron core 21, and a valve core 23.2 slidably connected with the shell 1, and a armature 23.3 is connected between the support seat 23.1 and the valve core 23.2.

[0043] When the electromagnetic assembly 4 is powered on, the fixed iron core 21 drives the movable assembly 23 to move by attracting the armature 23.3, the valve core 23.2 is separated from the valve seat 22, thereby opening the delivery channel 10, and hydrogen flows along the channel from one end of the gas inlet 10.1 to the side of the injection port 10.2; on the contrary, the electromagnetic assembly 4 is powered off, the movable assembly 23 can be reset by its own weight to abut against the valve seat 22, thereby closing the delivery channel 10.

[0044] Among them, the valve core 23.2 and the shell 1 and the valve seat 22 form a containing cavity 8, the support seat 23.1, the armature 23.3 and the valve core 23.2 are provided with flow channels 9, the flow channels 9 are communicated with the delivery channel 10, for hydrogen to flow in the movable assembly 23, the valve core 23.2 is provided with a plurality of connecting holes 80 connecting the flow channels 9 and the containing cavity 8; the containing cavity 8 can effectively prevent gas resistance, resulting in relatively large pressure fluctuation, at the same time, it is convenient for hydrogen to flow out quickly after the valve core 23.2 is opened.

[0045] In combination Fig. 3 When the valve core 23.2 closes the valve seat 22, hydrogen enters the containing cavity 8 through the gas inlet 10.1, the flow channel 9 and the connecting hole 80, which helps to open the valve core 23.2 and improves the opening and closing speed of the movable assembly 23.

[0046] In order to avoid large resistance of the movable assembly 23 during activity, a sliding gap 100 is left between the movable assembly 23 and the fixed iron core 21 and the shell 1, which avoids direct contact between the movable assembly 23 and the fixed iron core 21 and the shell 1, resulting in dry friction, and reduces the movement friction resistance of the movable assembly 23.

[0047] In this embodiment, the movable assembly 23 is also provided with a sealing ring 5 abutting against the fixed iron core 21 and the shell 1, which can limit the position of the movable assembly 23, avoid the movable assembly 23 from tilting and colliding or contacting the fixed iron core 21 and the shell 1, reduce the contact area and noise. Among them, the sealing ring 5 is made of polytetrafluoroethylene, which has low friction characteristics and can reduce friction resistance, further improving the opening and closing speed of the movable assembly 23.

[0048] One end of the valve rod 31 is provided with a sealing part 310, which is used to abut against the shell 1 to close the injection port 10.2; wherein the sealing part 310 is arranged outside the shell 1, when the hydrogen in the combustion chamber burns, the pressure in the combustion chamber increases, the reaction will push the sealing part 310 to close quickly, avoiding the problem of backfire.

[0049] In some embodiments, a flow guide 7 provided with at least one flow guide hole is further included, which is installed on the shell 1 provided with one end of the jet port 10.2, for guiding the hydrogen gas jet direction; the design can be changed according to the different installation positions of the nozzle to guide the gas jet direction, and better match the air inlet and the combustion chamber.

Claims

1. An in-cylinder direct injection hydrogen nozzle for providing hydrogen gas into a combustion chamber, characterized by, The valve comprises a housing with a delivery channel, an electromagnetic assembly, a valve core assembly and an opening and closing assembly; The valve core assembly comprises a fixed iron core, a valve seat, a movable assembly slidingly connected to the fixed iron core and the housing, and the electromagnetic assembly controls the movable assembly to open or close the delivery channel; An adjusting assembly is arranged between the fixed iron core and the housing to control the opening pressure of the movable assembly; An opening and closing assembly is arranged at the end of the valve core assembly to open or close the housing.

2. The in-cylinder direct injection hydrogen nozzle according to claim 1, characterized by: The opening and closing assembly comprises a valve rod, a compression ring and a stop ring sleeved outside the valve rod, an elastic member one arranged between the compression ring and the stop ring, and the compression ring is used to adjust the compression amount of the elastic member one to control the opening speed and pressure of the valve rod.

3. The in-cylinder direct injection hydrogen nozzle of claim 1, wherein: A gap is left between the movable assembly and the fixed iron core and the housing, and a sealing ring is arranged on the movable assembly to abut against the fixed iron core and the housing.

4. The in-cylinder direct injection hydrogen nozzle of claim 1, wherein: The movable assembly comprises a support seat slidingly connected to the fixed iron core and a valve core slidingly connected to the housing, and an armature is arranged between the support seat and the valve core.

5. The in-cylinder direct injection hydrogen nozzle of claim 1, wherein: The adjusting assembly comprises an adjusting part and an elastic member two arranged between the adjusting part and the movable assembly, and the adjusting part is used to adjust the compression amount of the elastic member two to control the opening pressure of the delivery channel.

6. The in-cylinder direct injection hydrogen nozzle of claim 2, wherein: A sealing part is arranged at one end of the valve rod, and the sealing part is arranged outside the housing to abut against the housing and close the delivery channel.

7. The in-cylinder direct injection hydrogen nozzle of claim 2, wherein: The compression ring and the stop ring are both provided with a plurality of flow-through holes.

8. The in-cylinder direct injection hydrogen nozzle of claim 4, wherein: The valve core, the housing and the valve seat form a containing cavity, and flow channels are arranged on the support seat, the armature and the valve core, and a plurality of connecting holes are arranged on the valve core to communicate the flow channels and the containing cavity.

9. The in-cylinder direct injection hydrogen nozzle of claim 1, wherein: An air inlet and a jet port are arranged on the housing to communicate with the delivery channel, and the jet port communicates with a combustion chamber.

10. The in-cylinder direct injection hydrogen nozzle of claim 9, wherein: A drainage part with at least one flow guide hole is arranged on the housing to guide the hydrogen jet direction.

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