CN117404211A - Gas switching system of dual-fuel engine - Google Patents
Gas switching system of dual-fuel engine Download PDFInfo
- Publication number
- CN117404211A CN117404211A CN202311439547.7A CN202311439547A CN117404211A CN 117404211 A CN117404211 A CN 117404211A CN 202311439547 A CN202311439547 A CN 202311439547A CN 117404211 A CN117404211 A CN 117404211A
- Authority
- CN
- China
- Prior art keywords
- cooling liquid
- way
- liquid pipeline
- natural gas
- pressure reducer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 36
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 92
- 239000003345 natural gas Substances 0.000 claims abstract description 48
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 45
- 239000006200 vaporizer Substances 0.000 claims abstract description 23
- 239000003381 stabilizer Substances 0.000 claims abstract description 21
- 239000002737 fuel gas Substances 0.000 claims abstract description 11
- 239000003949 liquefied natural gas Substances 0.000 claims abstract description 9
- 239000000110 cooling liquid Substances 0.000 claims description 98
- 239000002826 coolant Substances 0.000 claims description 24
- 239000007789 gas Substances 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 230000009977 dual effect Effects 0.000 claims 10
- 239000000498 cooling water Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0239—Pressure or flow regulators therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/029—Arrangement on engines or vehicle bodies; Conversion to gaseous fuel supply systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/06—Apparatus for de-liquefying, e.g. by heating
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention relates to a fuel gas switching system of a dual-fuel engine, which belongs to the technical field of fuel supply of vehicles and comprises a rocker switch, a high-pressure reducer, a natural gas three-way valve, a vaporizer and a pressure stabilizer; the first end of the high-pressure reducer is connected to an external compressed natural gas bottle, the second end of the high-pressure reducer is connected to the first end of the natural gas three-way valve, the second end of the natural gas three-way valve is connected to an external dual-fuel engine, the third end of the natural gas three-way valve is connected to the first end of the vaporizer through the voltage stabilizer, and the second end of the vaporizer is connected to the external liquefied natural gas bottle; the high-voltage pressure reducer and the voltage stabilizer are electrically connected with the rocker switch. According to the invention, the two natural gases can be switched by controlling the rocker switch of the cab, so that the vehicle can be added with the proper natural gas in various areas, and the economical efficiency of the vehicle is improved.
Description
Technical Field
The invention belongs to the technical field of vehicle fuel supply, and particularly relates to a fuel gas switching system of a dual-fuel engine.
Background
Currently, energy and environmental pollution problems are increasingly prominent. While fuel consumption of vehicles becomes a huge cost for vehicle operation, vehicle tail gas becomes a main factor of urban air pollution, and in order to reduce the vehicle operation cost and save energy sources, the pollution of the vehicle tail gas to the environment is reduced, and fuel gas (natural gas and liquefied gas) is used as main fuel of the vehicles. Fuel gas has better fuel economy than diesel and has lower exhaust gas pollutant content.
Gas (natural gas, liquefied gas) engines have been successfully used in various vehicles, and for remote areas, a great disadvantage is shown by using one fuel alone:
in Xinjiang areas of China, the gas station is mostly compressed natural gas under the influence of air pressure and rich natural gas resources, and the gas station in areas other than Xinjiang is mostly liquefied natural gas, so that single-fuel vehicles entering and exiting the Xinjiang areas are not easy to find suitable gas stations for gas filling, inconvenience is brought to running, and the defect that the single-fuel engine is in the Xinjiang areas cannot meet the uniformity of economy, power and practicability is the defect of the prior art.
Disclosure of Invention
The invention aims to provide a gas switching system of a dual-fuel engine, which aims at solving the defect that in the prior art, a single-fuel vehicle entering and exiting a Xinjiang area is difficult to find a proper gas station for gas filling and inconvenient in running.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a fuel gas switching system of a dual-fuel engine comprises a rocker switch, a high-pressure reducer, a natural gas three-way valve, a vaporizer and a pressure stabilizer;
the first end of the high-pressure reducer is connected to an external compressed natural gas bottle, the second end of the high-pressure reducer is connected to the first end of the natural gas three-way valve, the second end of the natural gas three-way valve is connected to an external dual-fuel engine, the third end of the natural gas three-way valve is connected to the first end of the vaporizer through the voltage stabilizer, and the second end of the vaporizer is connected to the external liquefied natural gas bottle; the high-voltage pressure reducer and the voltage stabilizer are electrically connected with the rocker switch.
The technical scheme is further improved, and the high-pressure reducer and the voltage stabilizer both comprise electromagnetic valve stop valves, and the electromagnetic valve stop valves are electrically connected with the rocker switch.
Further improvement of the technical scheme is that the rocker switch is arranged in a cab of a vehicle to which the dual-fuel engine belongs.
The technical scheme is further improved, and the natural gas three-way valve further comprises a one-way valve, wherein the second end of the high-pressure reducer is connected to the first end of the natural gas three-way valve through the one-way valve.
The technical scheme is further improved, and the engine cooling device further comprises a thermal circulation structure, wherein the thermal circulation structure penetrates through the engine, the vaporizer and the high-pressure reducer to form a thermal circulation loop, so that the engine is cooled, and heat is provided for the vaporizer and the high-pressure reducer.
The technical scheme is further improved, and the thermal cycle structure comprises a first cooling liquid pipeline, a second cooling liquid pipeline, a third cooling liquid pipeline, a fourth cooling liquid pipeline, a fifth cooling liquid pipeline, a sixth cooling liquid pipeline, a cooling liquid three-way electromagnetic valve and a return water three-way pipeline;
the first cooling liquid pipeline is arranged between the engine and the carburetor, the second cooling liquid pipeline is arranged between the carburetor and the cooling liquid three-way electromagnetic valve, the third cooling liquid pipeline is arranged between the cooling liquid three-way electromagnetic valve and the backwater three-way pipeline, the fourth cooling liquid pipeline is arranged between the backwater three-way pipeline and the engine, and the first cooling liquid pipeline, the second cooling liquid pipeline, the cooling liquid three-way electromagnetic valve, the third cooling liquid pipeline, the backwater three-way pipeline and the fourth cooling liquid pipeline form a first heat circulation loop;
the fifth cooling liquid pipeline is arranged between the cooling liquid three-way electromagnetic valve and the high-pressure reducer, the sixth cooling liquid pipeline is arranged between the high-pressure reducer and the backwater three-way pipeline, and the first cooling liquid pipeline, the second cooling liquid pipeline, the cooling liquid three-way electromagnetic valve, the fifth cooling liquid pipeline, the sixth cooling liquid pipeline, the backwater three-way pipeline and the fourth cooling liquid pipeline form a second heat circulation loop.
The technical scheme is further improved, and the cooling liquid three-way electromagnetic valve is connected with the natural gas three-way valve in a linkage way.
Further improvements in this technical scheme are still that first coolant pipe, second coolant pipe, third coolant pipe and fourth coolant pipe adopt the coolant hose of diameter for 20 millimeters.
Further improvements in this technical scheme are still that the fifth cooling liquid pipeline and the sixth cooling liquid pipeline adopt the cooling liquid hose that diameter is 8 millimeters.
Further improvements in the present solution are that the carburettor is an air-temperature carburettor.
The invention has the beneficial effects that the invention can realize the switching of two natural gases by controlling the rocker switch of the cab, so that the vehicle can be added with the proper natural gas in each region, the economical efficiency of the vehicle is improved, and meanwhile, the invention can change the cooling loop of cooling water by the rocker switch, and reduce the use length of the cooling pipeline while meeting the heat required by the vaporizer or the high-pressure reducer in a series-parallel connection mode.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
It can be seen that the present invention has outstanding substantial features and significant advances over the prior art, as well as its practical advantages.
Drawings
FIG. 1 is a schematic diagram of the relationship of the system.
Fig. 2 is a schematic diagram of the relationship of the thermal cycle structure.
110 is a rocker switch, 120 is a high-pressure reducer, 130 is a natural gas three-way valve, 140 is a vaporizer, 150 is a pressure stabilizer, 161 is a compressed natural gas cylinder, 162 is a liquefied natural gas cylinder, 170 is a dual-fuel engine, 180 is a one-way valve, 210 is a first cooling liquid pipeline, 220 is a second cooling liquid pipeline, 230 is a third cooling liquid pipeline, 240 is a fourth cooling liquid pipeline, 250 is a fifth cooling liquid pipeline, 260 is a sixth cooling liquid pipeline, 270 is a cooling liquid three-way electromagnetic valve, and 280 is a return water three-way pipeline.
Detailed Description
The present invention will be described in detail below by way of specific examples with reference to the accompanying drawings, the following examples being illustrative of the present invention and the present invention is not limited to the following embodiments.
As shown in fig. 1, the invention provides a fuel gas switching system of a dual-fuel engine, which comprises a rocker switch, a high-pressure reducer, a natural gas three-way valve, a vaporizer and a pressure stabilizer; the first end of the high-pressure reducer is connected to an external compressed natural gas bottle, the second end of the high-pressure reducer is connected to the first end of the natural gas three-way valve, the second end of the natural gas three-way valve is connected to an external dual-fuel engine, the third end of the natural gas three-way valve is connected to the first end of the vaporizer through the voltage stabilizer, and the second end of the vaporizer is connected to the external liquefied natural gas bottle; the high-voltage pressure reducer and the voltage stabilizer are electrically connected with the rocker switch.
In addition, the system also comprises a one-way valve, the second end of the high-pressure reducer is connected to the first end of the natural gas three-way valve through the one-way valve, and the arrangement of the one-way valve can prevent the gas of the pressure stabilizer from reversely flowing to the high-pressure reducer, so that the high-pressure reducer can be effectively protected from being damaged.
The vaporizer is used for vaporizing the liquid natural gas at the temperature of minus 170 ℃ into gaseous natural gas, heat is required to be absorbed, the heat source is mainly the cooling liquid of an engine, and particularly, the vaporizer adopts an air temperature vaporizer; the pressure stabilizer has the function of ensuring the pressure stability of the fuel gas after the liquefied natural gas is gasified, so that the pressure of the fuel gas entering the engine is 8bar; the high-pressure reducer is used for converting 20Mpa compressed natural gas into 8bar low-pressure natural gas, and also needs to absorb heat, and the heat source is also the cooling liquid of the engine; for this purpose, the system is also provided with a thermal circulation structure which passes through the engine, the vaporizer and the high-pressure reducer to form a thermal circulation loop, thereby cooling the engine and providing heat for the vaporizer and the high-pressure reducer.
Specifically, the rocker switch is arranged in a cab of a vehicle to which the dual-fuel engine belongs, and the high-voltage reducer and the voltage stabilizer both comprise electromagnetic valve stop valves which are electrically connected with the rocker switch; when the natural gas pressure regulator is used, the electromagnetic valve stop valve on the pressure regulator is electrified, the gasified natural gas passes, the electromagnetic valve stop valve on the pressure regulator is powered off, the gasified natural gas passes, the electromagnetic valve stop valve on the high-pressure reducer is electrified, the depressurized natural gas passes, the electromagnetic valve stop valve on the high-pressure reducer is powered off, and the depressurized natural gas passes; correspondingly, the working principle of the system is as follows: pressing down the rocker switch to electrify the voltage stabilizer, de-electrifying the high-voltage pressure reducer, and enabling fuel gas to sequentially enter the dual-fuel engine from the liquefied natural gas cylinder group through the vaporizer, the voltage stabilizer and the natural gas three-way valve; the rocker switch is restored to be electrified for the high-pressure reducer, the voltage stabilizer is powered off, and fuel gas sequentially passes through the high-pressure reducer, the one-way valve and the natural gas three-way valve from the compressed natural gas cylinder group to enter the dual-fuel engine.
As shown in fig. 2, the thermal cycle structure includes a first coolant pipe, a second coolant pipe, a third coolant pipe, a fourth coolant pipe, a fifth coolant pipe, a sixth coolant pipe, a coolant three-way solenoid valve, and a return water three-way pipe; the first cooling liquid pipeline is arranged between the engine and the carburetor, the second cooling liquid pipeline is arranged between the carburetor and the cooling liquid three-way electromagnetic valve, the third cooling liquid pipeline is arranged between the cooling liquid three-way electromagnetic valve and the backwater three-way pipeline, the fourth cooling liquid pipeline is arranged between the backwater three-way pipeline and the engine, and the first cooling liquid pipeline, the second cooling liquid pipeline, the cooling liquid three-way electromagnetic valve, the third cooling liquid pipeline, the backwater three-way pipeline and the fourth cooling liquid pipeline form a first heat circulation loop; the fifth cooling liquid pipeline is arranged between the cooling liquid three-way electromagnetic valve and the high-pressure reducer, the sixth cooling liquid pipeline is arranged between the high-pressure reducer and the backwater three-way pipeline, and the first cooling liquid pipeline, the second cooling liquid pipeline, the cooling liquid three-way electromagnetic valve, the fifth cooling liquid pipeline, the sixth cooling liquid pipeline, the backwater three-way pipeline and the fourth cooling liquid pipeline form a second heat circulation loop.
Specifically, the first cooling liquid pipeline, the second cooling liquid pipeline, the third cooling liquid pipeline and the fourth cooling liquid pipeline adopt cooling liquid hoses with the diameters of 20 millimeters, and the fifth cooling liquid pipeline and the sixth cooling liquid pipeline adopt cooling liquid hoses with the diameters of 8 millimeters; in addition, the three-way solenoid valve of the cooling liquid is connected with the three-way valve of the natural gas in a linkage way. When the rocker switch is pressed down, the cooling liquid three-way electromagnetic valve is communicated with the second cooling liquid pipeline and the third cooling liquid pipeline, cooling water returns to the engine through the return water three-way pipeline and the fourth cooling liquid pipeline, water flow is not reduced, and vaporization of the vaporizer is effectively guaranteed; the rocker switch is reset, the cooling liquid three-way electromagnetic valve is communicated with the second cooling liquid pipeline, the fifth cooling liquid pipeline and the sixth cooling liquid pipeline, cooling water returns to the engine through the return water three-way pipeline and the fourth cooling liquid pipeline, and the heating of the high-pressure reducer is not affected completely.
The foregoing disclosure is merely illustrative of the preferred embodiments of the invention and the invention is not limited thereto, since modifications and variations may be made by those skilled in the art without departing from the principles of the invention.
Claims (10)
1. The fuel gas switching system of the dual-fuel engine is characterized by comprising a rocker switch, a high-pressure reducer, a natural gas three-way valve, a vaporizer and a pressure stabilizer;
the first end of the high-pressure reducer is connected to an external compressed natural gas bottle, the second end of the high-pressure reducer is connected to the first end of the natural gas three-way valve, the second end of the natural gas three-way valve is connected to an external dual-fuel engine, the third end of the natural gas three-way valve is connected to the first end of the vaporizer through the voltage stabilizer, and the second end of the vaporizer is connected to the external liquefied natural gas bottle; the high-voltage pressure reducer and the voltage stabilizer are electrically connected with the rocker switch.
2. The dual fuel engine gas switching system of claim 1, wherein the high pressure reducer and the pressure stabilizer each include a solenoid shut-off valve electrically connected to the rocker switch.
3. The dual fuel engine gas switching system of claim 1 wherein the rocker switch is mounted in a cab of a vehicle to which the dual fuel engine belongs.
4. The dual fuel engine gas switching system of claim 1, further comprising a one-way valve, the second end of the high pressure reducer being connected to the first end of the natural gas three-way valve through the one-way valve.
5. The dual fuel engine gas switching system of claim 1 further comprising a thermal circulation structure forming a thermal circulation loop through the engine, the carburetor and the high pressure reducer for cooling the engine and providing heat to the carburetor and the high pressure reducer.
6. The dual fuel engine gas switching system of claim 5, wherein the thermal cycle structure includes a first coolant conduit, a second coolant conduit, a third coolant conduit, a fourth coolant conduit, a fifth coolant conduit, a sixth coolant conduit, a coolant three-way solenoid valve, and a return water three-way conduit;
the first cooling liquid pipeline is arranged between the engine and the carburetor, the second cooling liquid pipeline is arranged between the carburetor and the cooling liquid three-way electromagnetic valve, the third cooling liquid pipeline is arranged between the cooling liquid three-way electromagnetic valve and the backwater three-way pipeline, the fourth cooling liquid pipeline is arranged between the backwater three-way pipeline and the engine, and the first cooling liquid pipeline, the second cooling liquid pipeline, the cooling liquid three-way electromagnetic valve, the third cooling liquid pipeline, the backwater three-way pipeline and the fourth cooling liquid pipeline form a first heat circulation loop; the fifth cooling liquid pipeline is arranged between the cooling liquid three-way electromagnetic valve and the high-pressure reducer, the sixth cooling liquid pipeline is arranged between the high-pressure reducer and the backwater three-way pipeline, and the first cooling liquid pipeline, the second cooling liquid pipeline, the cooling liquid three-way electromagnetic valve, the fifth cooling liquid pipeline, the sixth cooling liquid pipeline, the backwater three-way pipeline and the fourth cooling liquid pipeline form a second heat circulation loop.
7. The dual fuel engine gas switching system of claim 6, wherein the coolant three-way solenoid valve is coupled to the natural gas three-way valve.
8. The dual fuel engine gas switching system of claim 6 wherein the first, second, third, and fourth coolant lines employ coolant hoses having a diameter of 20 millimeters.
9. The dual fuel engine gas switching system of claim 6 wherein the fifth and sixth coolant lines employ coolant hoses having a diameter of 8 millimeters.
10. The dual fuel engine gas switching system of claim 1 wherein the carburetor is an air temperature carburetor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311439547.7A CN117404211A (en) | 2023-10-31 | 2023-10-31 | Gas switching system of dual-fuel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311439547.7A CN117404211A (en) | 2023-10-31 | 2023-10-31 | Gas switching system of dual-fuel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117404211A true CN117404211A (en) | 2024-01-16 |
Family
ID=89494159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311439547.7A Pending CN117404211A (en) | 2023-10-31 | 2023-10-31 | Gas switching system of dual-fuel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117404211A (en) |
-
2023
- 2023-10-31 CN CN202311439547.7A patent/CN117404211A/en active Pending
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