CN210829507U - Natural gas engine acceleration and deceleration control system with multi-way valve - Google Patents
Natural gas engine acceleration and deceleration control system with multi-way valve Download PDFInfo
- Publication number
- CN210829507U CN210829507U CN201921015318.1U CN201921015318U CN210829507U CN 210829507 U CN210829507 U CN 210829507U CN 201921015318 U CN201921015318 U CN 201921015318U CN 210829507 U CN210829507 U CN 210829507U
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- CN
- China
- Prior art keywords
- natural gas
- way valve
- engine
- gas engine
- valve
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 239000003345 natural gas Substances 0.000 title claims abstract description 52
- 230000001133 acceleration Effects 0.000 title claims abstract description 11
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 18
- 239000001257 hydrogen Substances 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims description 4
- 239000000446 fuel Substances 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 4
- 239000007924 injection Substances 0.000 abstract description 4
- 230000004044 response Effects 0.000 abstract description 4
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000001737 promoting effect Effects 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
An object of the utility model is to provide a take natural gas engine of multi-ported valve to add control system that slows down, including natural gas engine, turbo charger, natural gas feeding device, hydrogen feeding device, multi-ported valve, compressor, turbine are connected to natural gas engine, install multi-ported valve, blender, intercooler in proper order in the intake pipe, and natural gas feeding device passes through the air throttle and connects the multi-ported valve, and the multi-ported valve is connected respectively to hydrogen feeding device, blender, and the blast pipe passes through the back flow and connects the multi-ported valve. The utility model can rapidly respond to acceleration and deceleration and rapidly adjust air input to adapt to the change of the air injection quantity of natural gas, thereby enhancing the variable load capacity, shortening the speed change time and promoting the dynamic response of the variable load capacity; during acceleration and deceleration, the air-fuel ratio is controlled in a proper value range, and the possibility of generating knocking is reduced; the rotation angle of the multi-way valve is controlled in real time, and only natural gas is used as fuel for the engine when the engine is in a new stable state.
Description
Technical Field
The utility model relates to an engine, specifically speaking are natural gas engine.
Background
Because of the heavy use of petroleum resources, serious environmental pollution is caused. Therefore, in order to improve and protect the environment, such clean energy as liquefied natural gas is considered. The natural gas has the advantages of rich storage capacity, low cost, high energy density, low sulfur content, cleanness, sanitation and the like, and becomes an ideal fuel of the new energy internal combustion engine.
Compared with a diesel engine, in a dynamic process, the natural gas engine has a weak capability in acceleration and deceleration because the natural gas engine changes the injection amount of natural gas, so that the air-fuel ratio changes, the improper air-fuel ratio can make the natural gas engine face the problems of knocking and misfire, and the slower the injection amount of the natural gas changes, the more easily knocking and misfire occur.
The air-fuel ratio of a natural gas engine greatly affects the possibility of knocking and misfiring. In the transient condition, the air-fuel ratio may deviate from the steady operation region, and knocking and misfire are liable to occur. To reduce this hazard, the natural gas engine's turndown capability is forced to diminish. The natural gas engine thus takes longer to operate to the new stable point.
Disclosure of Invention
An object of the utility model is to provide a take natural gas engine acceleration and deceleration control system of multi-ported valve that can solve the poor scheduling problem of engine dynamic response.
The purpose of the utility model is realized like this:
the utility model relates to a take natural gas engine acceleration and deceleration control system of multi-ported valve, characterized by: the natural gas engine is connected with the gas compressor through an air inlet pipe, the natural gas engine is connected with the turbine through an exhaust pipe, the multi-way valve, the mixer and the intercooler are sequentially installed on the air inlet pipe, the natural gas supply device is connected with the multi-way valve through the throttle valve, the hydrogen supply device and the mixer are respectively connected with the multi-way valve, the exhaust pipe is connected with the multi-way valve through a return pipe, and the ECU is respectively connected with the throttle valve and the multi-way valve.
The utility model discloses can also include:
1. the multi-way valve comprises a rotatable cross-shaped channel inside, the cross-shaped channel comprises a first channel and a fourth channel which are arranged anticlockwise, the first channel corresponds to the natural gas supply device, the second channel corresponds to the hydrogen supply device, the third channel corresponds to the mixer, and the fourth channel corresponds to the return pipe; the cross-shaped channel includes first-third states during rotation:
the first state: is communicated with a hydrogen supply device and is disconnected with a return pipe at the same time;
the second state: is communicated with the return pipe and is disconnected with the hydrogen supply device at the same time;
the third state: simultaneously with the hydrogen supply means and the return conduit.
The utility model has the advantages that: the utility model can make quick response to the acceleration and deceleration of the natural gas engine, quickly adjust the air input to adapt to the change of the air injection amount of the natural gas, enhance the variable load capacity, shorten the speed change time and promote the dynamic response of the variable load capacity; during acceleration and deceleration, the air-fuel ratio is controlled in a proper value range, and the possibility of generating knocking is reduced; the rotation angle of the multi-way valve is controlled in real time, and only natural gas is used as fuel for the engine when the engine is in a new stable state.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a multi-way valve;
fig. 3 is a flowchart of the control method of the present invention.
Detailed Description
The invention will be described in more detail below by way of example with reference to the accompanying drawings:
with reference to fig. 1 to 3, the present invention includes a natural gas engine 10, a turbocharger, an intercooler 9, a multi-way valve 7, a natural gas supply device 3, a hydrogen supply device 4, and the like. The natural gas supply device 3 is communicated with the throttle valve 1, the throttle valve 1 is connected to a multi-way valve 7, the hydrogen supply device 4 is also connected to the multi-way valve 7, and the multi-way valve is connected to the mixer 12; the compressor 2 is connected with a mixer 12, the mixer is connected with an intercooler 9, and the intercooler 9 is connected with a natural gas engine 10, so that mixed gas can enter a cylinder conveniently. The natural gas engine 10 has an exhaust end connected back to the multi-way valve 7 through a return pipe 8 and an end connected to the turbine 6. The compressor 2 is connected with the turbine 6 through an intermediate shaft 11. The ECU5 controls the throttle valve 1 and the multi-way valve 7. The opening of the throttle valve 1 corresponds to the working condition one by one, namely when the natural gas engine 10 is in 50% working condition, the opening of the throttle valve 1 is 50%, the opening of the throttle valve 1 is changed from 20% to 100%, when the working condition is lower than 20%, the natural gas engine 10 stops working, and the throttle valve 1 is directly closed. The relation between the natural gas and the opening of the throttle valve 1 is L-50P, wherein L is the natural gas flow rate in kg/h, and P is the opening of the throttle valve in percent.
The utility model discloses a control flow:
when the engine is in a stable state, the natural gas is supplied by the natural gas supply device 3, passes through the throttle valve 1, then passes through the multi-way valve 7, is mixed with air passing through the supercharger 2 in the mixer 12, passes through the intercooler 9, enters a cylinder of the natural gas engine 10, and the working exhaust gas is discharged to the atmosphere through the turbine 6. The waste gas passes through the turbine 6, so that the turbine 6 rotates, the intermediate shaft 11 drives the compressor 2 to rotate and pressurize, and the entering air is pressurized. In the steady state, the multi-way valve 7 is in the intermediate position and only natural gas passes through.
When the engine is accelerated, a set rotating speed is provided, the opening degree of the throttle valve 1 is increased to an opening angle corresponding to a new stable working condition, the supply amount of natural gas is increased, meanwhile, the ECU5 clockwise rotates the multi-way valve 7 according to the difference between a set rotating speed value and an actual value, the relation is theta 0.05 x △ n, wherein theta is the rotating angle of the multi-way valve and has the unit of DEG, △ n is the difference between the set rotating speed value and the actual value and has the unit of rpm, when the difference is 0, the multi-way valve 7 does not rotate, when the multi-way valve 7 clockwise rotates, the multi-way valve 7 is communicated with the hydrogen supply device 4, hydrogen supplied by the hydrogen supply device 4 enters the multi-way valve 7 and enters a cylinder after being mixed with natural gas, the hydrogen can accelerate flame propagation speed, combustion is enhanced, the rotating speed is increased, the engine is enabled to reach a stable state more quickly, and the engine gradually reaches a new stable state along with the reduction of the rotating speed difference, and the ECU5 controls the multi-way valve to.
When the engine is decelerated, a set rotating speed is provided, the opening degree of the throttle valve 1 is reduced by a corresponding opening angle under a new stable working condition, and the supply quantity of natural gas is reduced, meanwhile, the ECU5 rotates the multi-way valve 7 anticlockwise according to the difference between a rotating speed set value and an actual value, the relation is theta 0.05 x △ n, wherein theta is the rotating angle of the multi-way valve and has the unit of DEG, △ n is the difference between the rotating speed set value and the actual value and has the unit of rpm, when the multi-way valve 7 rotates anticlockwise, the multi-way valve 7 is communicated with the return pipe 8, waste gas enters the multi-way valve 7 through the return pipe 8 and enters a cylinder after being mixed with the natural gas, the combustion rate of the natural gas is reduced due to the addition of the waste gas, the rotating speed is reduced, the engine reaches the stable state more quickly, and the ECU5 controls the multi-way valve to rotate to cut off the supply.
Claims (2)
1. The utility model provides a take natural gas engine acceleration and deceleration control system of multi-ported valve which characterized in that: the natural gas engine is connected with the gas compressor through an air inlet pipe, the natural gas engine is connected with the turbine through an exhaust pipe, the multi-way valve, the mixer and the intercooler are sequentially installed on the air inlet pipe, the natural gas supply device is connected with the multi-way valve through the throttle valve, the hydrogen supply device and the mixer are respectively connected with the multi-way valve, the exhaust pipe is connected with the multi-way valve through a return pipe, and the ECU is respectively connected with the throttle valve and the multi-way valve.
2. The natural gas engine acceleration and deceleration control system with the multi-way valve as claimed in claim 1, characterized in that: the multi-way valve comprises a rotatable cross-shaped channel inside, the cross-shaped channel comprises a first channel and a fourth channel which are arranged anticlockwise, the first channel corresponds to the natural gas supply device, the second channel corresponds to the hydrogen supply device, the third channel corresponds to the mixer, and the fourth channel corresponds to the return pipe; the cross-shaped channel includes first-third states during rotation:
the first state: is communicated with a hydrogen supply device and is disconnected with a return pipe at the same time;
the second state: is communicated with the return pipe and is disconnected with the hydrogen supply device at the same time;
the third state: simultaneously with the hydrogen supply means and the return conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015318.1U CN210829507U (en) | 2019-07-02 | 2019-07-02 | Natural gas engine acceleration and deceleration control system with multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921015318.1U CN210829507U (en) | 2019-07-02 | 2019-07-02 | Natural gas engine acceleration and deceleration control system with multi-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210829507U true CN210829507U (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921015318.1U Expired - Fee Related CN210829507U (en) | 2019-07-02 | 2019-07-02 | Natural gas engine acceleration and deceleration control system with multi-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210829507U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318890A (en) * | 2019-07-02 | 2019-10-11 | 哈尔滨工程大学 | A kind of natural gas engine feed speed control system and control method with multiple-way valve |
-
2019
- 2019-07-02 CN CN201921015318.1U patent/CN210829507U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110318890A (en) * | 2019-07-02 | 2019-10-11 | 哈尔滨工程大学 | A kind of natural gas engine feed speed control system and control method with multiple-way valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200623 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |