CN217107278U - High-pressure air rail - Google Patents
High-pressure air rail Download PDFInfo
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- CN217107278U CN217107278U CN202220473905.0U CN202220473905U CN217107278U CN 217107278 U CN217107278 U CN 217107278U CN 202220473905 U CN202220473905 U CN 202220473905U CN 217107278 U CN217107278 U CN 217107278U
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Abstract
The utility model belongs to the technical field of the natural gas engine, a high-pressure gas rail is disclosed, this high-pressure gas rail includes gas rail body and check valve, and the gas rail body is provided with gas passageway and gas storage chamber, and gas storage chamber and injection valve intercommunication, the check valve is fixed to be set up in the gas rail body, and is located between gas passageway and the gas storage chamber, and the check valve is configured into the gas and can only follow the gas passageway and get into the gas storage chamber through the check valve, and when gas storage intracavity pressure reached the settlement pressure, the gas passageway did not communicate with the gas storage chamber. The high-pressure gas rail can ensure that the gas pressure in the gas channel is not influenced when the injection valve is opened, and the influence on the gas pressure in the gas storage cavity is small when the gas pressure in the gas channel fluctuates, so that the gas air input of each cylinder is consistent, the combustion consistency of each cylinder is good, and the power of an engine is stable.
Description
Technical Field
The utility model relates to a natural gas engine technical field especially relates to a high-pressure gas rail.
Background
Natural gas is increasingly used as a clean petroleum alternative fuel. With the continuous upgrading of emission regulations, more and more host plants begin to vigorously popularize natural gas engines, and because the price of natural gas is higher than that of petroleum, the cost advantage is high, and most customers select more natural gas engines. The natural gas engine generally adopts a multipoint injection technology, a fuel gas injection valve is arranged at the position of an air inlet manifold, the requirement of fuel gas entering an engine cylinder is ensured by setting ignition time and electrifying time, the driving pressure difference of the fuel gas injection valve is generally 1.5-2bar, and the fuel gas inlet is ensured to meet the requirement of the engine. The multi-point injection technology not only improves the transient response of the engine, but also improves the combustion consistency of each cylinder of the engine, brings great benefits to the stable operation of the engine, and simultaneously avoids the emission problems of methane escape and the like. The air rail in the existing engine is only in a pipeline structure, multiple cylinders share one air rail, and the air rail is directly communicated with injection valves of the multiple cylinders. When the engine starts to work, the plurality of injection valves are opened in sequence according to the ignition timing, and the opened injection valves inject fuel gas from the air rail into the cylinder under the action of the pressure difference. Because the gas rail is directly communicated with the injection valve, when one injection valve is opened, the pressure in the gas rail is easy to fluctuate, generally, the pressure in the gas rail is reduced, the pressure reduction in the gas rail can possibly cause the pressure difference of the injection valve to be opened next to be smaller, and therefore, the gas entering the cylinder is less than that under normal conditions, the mixed gas is over-lean, the ignition is poor, the combustion of each cylinder of the engine is inconsistent, and the power is unstable.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high-pressure gas rail to solve because gas rail and injection valve directly communicate, the pressure oscillation in the gas rail influences the injection valve pressure differential, thereby the influence enters into the gas volume in the cylinder, causes the gas mixture to cross rare, leads to the bad fire, and each jar of burning of engine is inconsistent, the unstable problem of power.
To achieve the purpose, the utility model adopts the following technical proposal:
a high pressure gas rail comprising:
the gas rail comprises a gas rail body, a gas pipe and a gas storage cavity, wherein the gas rail body is provided with a gas channel and the gas storage cavity, and the gas storage cavity is communicated with an injection valve;
the check valve, the check valve is fixed set up in the gas rail body, and be located the gas passageway with between the gas storage chamber, the check valve is configured into the gas and can only be followed the gas passageway passes through the check valve gets into the gas storage chamber, and when the gas storage intracavity pressure reaches set pressure, the gas passageway with the gas storage chamber does not communicate.
As a preferable scheme of the high-pressure gas rail, the check valve comprises a spring, a valve core and a valve body fixedly arranged on the gas rail body, the valve body is provided with an accommodating cavity, an air inlet hole and an air outlet hole, the air inlet hole is communicated with the fuel gas channel, the air outlet is communicated with the air storage cavity, the spring and the valve core are both positioned in the accommodating cavity, and are both positioned between the air inlet hole and the air outlet hole, both ends of the spring are respectively butted against the valve body and the valve core, the valve core moves relative to the valve body along the extending direction of the spring to form a first limit position and a second limit position, the first limit position is positioned between the second limit position and the air inlet hole, when the valve core is positioned at the first limit position and the second limit position, the air inlet hole is not communicated with the air outlet hole; when the valve core is positioned between the first limit position and the second limit position, the air inlet hole is communicated with the air outlet hole.
As a preferable mode of the above high-pressure air rail, the valve body is provided with a first abutting surface configured to abut against the valve element when the valve element is located at the first limit position so that the air outlet hole and the air inlet hole are not communicated.
As a preferable mode of the above high-pressure air rail, the valve body is provided with a second abutting surface, the second abutting surface is located between the first abutting surface and the air outlet, and the second abutting surface is configured to enable the valve element to abut against the second abutting surface when the valve element is located at the second limit position, so that the air outlet is not communicated with the air inlet.
As an optimal scheme of the high-pressure air rail, the high-pressure air rail further comprises a gas joint, wherein the gas joint is fixedly arranged on the air rail body, and the gas joint is communicated with the gas storage cavity.
As a preferred scheme of above-mentioned high-pressure gas rail, still include first pressure sensor, first pressure sensor set up in the gas storage chamber, first pressure sensor is used for detecting the gas pressure in gas storage chamber.
As a preferred scheme of the above high-pressure gas rail, the high-pressure gas rail further comprises a second pressure sensor, the second pressure sensor is arranged in the gas channel, and the second pressure sensor is used for detecting the gas pressure of the gas channel.
As an optimized scheme of the above high-pressure air rail, the air rail body comprises a first air rail body and a second air rail body fixedly arranged on the first air rail body, the gas channel is arranged on the first air rail body, and the check valve and the gas storage cavity are arranged on the second air rail body.
As a preferable mode of the above high-pressure air rail, the first air rail body and the second air rail body are vertically arranged.
As a preferable scheme of the above high-pressure air rail, the first air rail body and the second air rail body are of an integrally formed structure.
The utility model has the advantages that:
the utility model provides a high-pressure gas rail, in this high-pressure gas rail, the check valve is configured into the gas and can only follow the gas passageway and get into the gas storage chamber through the check valve, and when gas storage intracavity pressure reached the settlement pressure, the gas passageway did not communicate with the gas storage chamber. Because the gas in the gas storage cavity is preferentially used when the injection valve is opened, the gas pressure in the gas channel cannot be influenced, and the stability of the gas pressure in the gas channel can be kept. And if the gas pressure in the gas channel fluctuates, the injection valve preferentially consumes the gas in the gas storage cavity when opened, and the check valve can ensure that the gas pressure in the gas storage cavity is slightly influenced by the pressure fluctuation in the gas channel, so that the inconsistent gas air input of each cylinder caused by the fluctuation of the gas pressure in the gas channel is avoided. The high-pressure gas rail can ensure that the gas pressure in the gas channel is not influenced when the injection valve is opened, the influence on the gas pressure in the gas storage cavity is small when the gas pressure in the gas channel fluctuates, the injection valve of each cylinder is ensured not to be influenced by the injection valves of other cylinders when the injection valve works, the gas inflow of each cylinder is ensured to be consistent, the combustion consistency of each cylinder is good, and the power of an engine is stable.
Drawings
Fig. 1 is a schematic structural diagram of a high-pressure air rail according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a check valve of a high-pressure air rail according to an embodiment of the present invention.
In the figure:
1. an air rail body; 11. a first gas rail body; 12. a second air rail body; 111. a gas channel;
2. a gas storage cavity;
3. a one-way valve; 31. a valve body; 32. a valve core; 33. a spring; 34. an air inlet; 35. an air outlet; 311. A first abutting surface; 312. a second abutting surface;
4. a gas joint.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
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", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, 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.
The utility model provides a high-pressure gas rail, as shown in figure 1, this high-pressure gas rail includes gas rail body 1 and check valve 3, gas rail body 1 is provided with gas passageway 111 and gas storage chamber 2, gas storage chamber 2 and injection valve intercommunication, 3 fixed settings in gas rail body 1 of check valve, and be located between gas passageway 111 and the gas storage chamber 2, check valve 3 is configured into the gas and can only get into gas storage chamber 2 from gas passageway 111 through check valve 3, and when 2 internal pressure of gas storage chamber reached the settlement pressure, gas passageway 111 and gas storage chamber 2 do not communicate. This high-pressure gas rail, the gas in the gas passageway 111 enters into gas storage chamber 2 through check valve 3 in, when 2 internal pressures of gas storage chamber reach set pressure, the gas stops to get into gas storage chamber 2, and after the gas in the gas storage chamber 2 was sprayed the cylinder by the injection valve, check valve 3 opened once more makes the gas in the gas passageway 111 get into gas storage chamber 2 in, prepares for next time the injection valve and sprays and use. When the injection valve is opened, the gas stored in the pressure accumulation cavity is injected into the cylinder, and because the gas channel 111 is not communicated with the gas storage valve, the pressure in the gas channel 111 cannot fluctuate, so that the gas pressure in the gas channel 111 cannot be influenced in the working process of each injection valve, and the stability of the gas pressure in the gas channel 111 is kept. Moreover, if the gas pressure in the gas channel 111 fluctuates, the check valve 3 can ensure that the gas pressure in the gas storage cavity 2 does not change greatly, the influence of the pressure fluctuation in the gas channel 111 on the gas pressure in the gas storage cavity 2 is small, the injection valve is ensured not to be influenced in the working process, and the problems that the gas intake amount of each cylinder is inconsistent due to the fluctuation of the gas pressure in the gas channel 111, the combustion consistency of each cylinder is poor, the power of an engine is unstable and the like are solved.
Alternatively, as shown in fig. 2, the check valve 3 includes a spring 33, a valve core 32 and a valve body 31 fixedly arranged on the air rail body 1, the valve body 31 is provided with a receiving cavity, an air inlet hole 34 and an air outlet hole 35, the air inlet hole 34 is communicated with the gas channel 111, the air outlet hole 35 is communicated with the air storage cavity 2, the spring 33 and the valve core 32 are both located in the receiving cavity and are both located between the air inlet hole 34 and the air outlet hole 35, two ends of the spring 33 are respectively abutted against the valve body 31 and the valve core 32, the valve core 32 moves relative to the valve body 31 along the extending direction of the spring 33 and has a first limit position and a second limit position, the first limit position is located between the second limit position and the air inlet hole 34, and when the valve core 32 is located at the first limit position and the second limit position, the air inlet hole 34 and the air outlet hole 35 are not communicated; when the spool 32 is positioned between the first and second extreme positions, the inlet port 34 and the outlet port 35 communicate. When the pressure in the gas storage cavity 2 does not reach the set pressure, the gas in the gas channel 111 enters the gas inlet 34 and the accommodating cavity and pushes the valve core 32 to compress the spring 33, so that the valve core 32 is positioned between the first limit position and the second limit position, the gas inlet 34 is communicated with the gas outlet 35, and the gas can enter the gas storage cavity 2 from the gas channel 111; when the pressure of the gas in the gas storage cavity 2 reaches the set pressure, the spring 33 drives the valve core 32 to move to the first limit position, so that the gas inlet hole 34 and the gas outlet hole 35 are not communicated, and the gas is prevented from entering the gas storage cavity 2 from the gas channel 111.
When the pressure of the fuel gas in the fuel gas channel 111 fluctuates, the check valve 3 can ensure that the influence on the pressure of the fuel gas in the gas storage cavity 2 is small. If the gas pressure in the gas channel 111 is too high, the gas in the gas channel 111 pushes the valve core 32 to reach the second limit position, and when the valve core 32 is located at the second limit position, the gas inlet 34 and the gas outlet 35 are not communicated, so that the gas is prevented from entering the gas storage cavity 2 from the gas channel 111; if the gas pressure in the gas channel 111 is too small, the valve core 32 is located at the first limit position under the gas pressure of the gas storage cavity 2 and the elastic force of the spring 33, and the gas inlet 34 and the gas outlet 35 are not communicated when the valve core 32 is located at the first limit position, so that the gas is prevented from entering the gas storage cavity 2 from the gas channel 111.
Alternatively, the valve body 31 is provided with a first abutment surface 311, and the first abutment surface 311 is configured such that the valve spool 32 abuts against the first abutment surface 311 when the valve spool 32 is located at the first limit position to make the air outlet hole 35 and the air inlet hole 34 not communicate. In this embodiment, the first abutting surface 311 is a bottom surface of the receiving cavity close to the air intake hole 34. When the valve body 32 abuts against the first abutting surface 311, the valve body 32 blocks the communication between the intake port 34 and the accommodating chamber, so that the intake port 34 and the outlet port 35 are not communicated.
Alternatively, the valve body 31 is provided with a second abutment surface 312, the second abutment surface 312 is located between the first abutment surface 311 and the air outlet hole 35, and the second abutment surface 312 is configured such that the spool 32 can abut against the second abutment surface 312 when the spool 32 is located at the second limit position so that the air outlet hole 35 and the air inlet hole 34 are not communicated. In this embodiment, the second abutment surface 312 is provided on a sidewall of the accommodation chamber. The second abutment surface 312 is located between the first abutment surface 311 and the outlet bore 35. When the pressure of the gas in the gas channel 111 is too high, the gas in the gas channel 111 enters the gas inlet 34 and the accommodating cavity pushes the valve core 32 to move to the second limit position, the valve core 32 is abutted against the second abutting surface 312, and the valve core 32 seals the accommodating cavity, so that the gas inlet 34 is not communicated with the gas outlet 35.
Optionally, this high pressure gas rail still includes gas joint 4, and gas joint 4 is fixed to be set up in gas rail body 1, and gas joint 4 communicates with gas storage chamber 2. Install gas on gas rail body 1 and connect 4, the injection valve is connected and is connected with gas rail body 1 through connecting 4 with the gas, and it is more convenient to make to connect.
Optionally, the high-pressure gas rail further comprises a first pressure sensor, the first pressure sensor is disposed in the gas storage cavity 2, and the first pressure sensor is used for detecting gas pressure of the gas storage cavity 2. Optionally, the high-pressure gas rail further includes a second pressure sensor, the second pressure sensor is disposed in the gas channel 111, and the second pressure sensor is configured to detect a gas pressure of the gas channel 111. Detect the gas pressure of gas storage chamber 2 through first pressure sensor, detect the gas pressure of gas passageway 111 through second pressure sensor, first pressure sensor and second pressure sensor send the pressure value that detects for ECU, and ECU judges whether the pressure value is normal, if the abnormal conditions then reports to the police, even parks when serious.
Optionally, the gas rail body 1 includes a first gas rail body 11 and a second gas rail body 12 fixedly disposed on the first gas rail body 11, the gas channel 111 is disposed on the first gas rail body 11, and the check valve 3 and the gas storage cavity 2 are disposed on the second gas rail body 12. It can be understood that the injection valve of each cylinder is provided with the gas storage cavity 2 and the check valve 3, then the gas rail body 1 comprises a plurality of second gas rail bodies 12 corresponding to the number of the injection valves, the gas channel 111 arranged on the first gas rail body 11 is shared, and the gas enters the plurality of gas storage cavities 2 from the gas channel 111 for consumption of the plurality of injection valves. So set up, enable first gas rail body 11's simple structure, convenient processing.
Alternatively, the first and second air rail bodies 11 and 12 are vertically disposed. A convenient one-way valve 3 and gas connector 4 are connected to the second gas rail body 12.
Optionally, the first air rail body 11 and the second air rail body 12 are of an integrally formed structure. The air rail body 1 is high in structural strength, few in parts and less in installation steps.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A high pressure gas rail, comprising:
the gas rail comprises a gas rail body (1), wherein the gas rail body (1) is provided with a gas channel (111) and a gas storage cavity (2), and the gas storage cavity (2) is communicated with an injection valve;
check valve (3), check valve (3) fixed set up in gas rail body (1), and be located gas passageway (111) with between gas storage chamber (2), check valve (3) are configured into the gas and can only be followed gas passageway (111) pass through check valve (3) get into gas storage chamber (2), and when gas storage chamber (2) internal pressure reaches set pressure, gas passageway (111) with gas storage chamber (2) do not communicate.
2. The high-pressure air rail according to claim 1, wherein the check valve (3) comprises a spring (33), a valve core (32) and a valve body (31) fixedly arranged on the air rail body (1), the valve body (31) is provided with a containing cavity, an air inlet hole (34) and an air outlet hole (35), the air inlet hole (34) is communicated with the gas channel (111), the air outlet hole (35) is communicated with the gas storage cavity (2), the spring (33) and the valve core (32) are both positioned in the containing cavity and both positioned between the air inlet hole (34) and the air outlet hole (35), both ends of the spring (33) are respectively abutted against the valve body (31) and the valve core (32), and the valve core (32) moves relative to the valve body (31) along the extending direction of the spring (33) to have a first limit position and a second limit position, the first limit position is located between the second limit position and the air inlet hole (34), and when the valve core (32) is located at the first limit position and the second limit position, the air inlet hole (34) is not communicated with the air outlet hole (35); when the valve core (32) is positioned between the first limit position and the second limit position, the air inlet hole (34) is communicated with the air outlet hole (35).
3. The high-pressure air rail according to claim 2, wherein the valve body (31) is provided with a first abutment surface (311), and the first abutment surface (311) is configured such that the valve spool (32) abuts against the first abutment surface (311) when the valve spool (32) is located at the first limit position to make the air outlet hole (35) and the air inlet hole (34) not communicate.
4. The high-pressure air rail according to claim 3, wherein the valve body (31) is provided with a second abutment surface (312), the second abutment surface (312) being located between the first abutment surface (311) and the air outlet hole (35), the second abutment surface (312) being configured such that the spool (32) can abut against the second abutment surface (312) when the spool (32) is located at the second limit position to make the air outlet hole (35) and the air inlet hole (34) not communicate.
5. The high-pressure air rail according to claim 1, further comprising a gas joint (4), wherein the gas joint (4) is fixedly arranged on the air rail body (1), and the gas joint (4) is communicated with the gas storage cavity (2).
6. The high-pressure gas rail according to claim 1, further comprising a first pressure sensor disposed in the gas storage chamber (2), the first pressure sensor being configured to detect a gas pressure of the gas storage chamber (2).
7. The high pressure gas rail according to claim 1, further comprising a second pressure sensor provided to the gas channel (111), the second pressure sensor being configured to detect a gas pressure of the gas channel (111).
8. The high-pressure air rail according to claim 1, wherein the air rail body (1) comprises a first air rail body (11) and a second air rail body (12) fixedly arranged on the first air rail body (11), the gas channel (111) is arranged on the first air rail body (11), and the check valve (3) and the gas storage cavity (2) are arranged on the second air rail body (12).
9. The high pressure gas rail according to claim 8, characterized in that the first gas rail body (11) and the second gas rail body (12) are arranged vertically.
10. The high pressure air rail according to claim 8, characterized in that the first air rail body (11) and the second air rail body (12) are of an integrally formed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220473905.0U CN217107278U (en) | 2022-03-07 | 2022-03-07 | High-pressure air rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220473905.0U CN217107278U (en) | 2022-03-07 | 2022-03-07 | High-pressure air rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217107278U true CN217107278U (en) | 2022-08-02 |
Family
ID=82600400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220473905.0U Active CN217107278U (en) | 2022-03-07 | 2022-03-07 | High-pressure air rail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217107278U (en) |
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2022
- 2022-03-07 CN CN202220473905.0U patent/CN217107278U/en active Active
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