CN116220973A - Method for preheating methanol automobile fuel - Google Patents
Method for preheating methanol automobile fuel Download PDFInfo
- Publication number
- CN116220973A CN116220973A CN202310276192.8A CN202310276192A CN116220973A CN 116220973 A CN116220973 A CN 116220973A CN 202310276192 A CN202310276192 A CN 202310276192A CN 116220973 A CN116220973 A CN 116220973A
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- China
- Prior art keywords
- fuel
- methanol
- preheating
- injection pump
- engine
- 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.)
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Links
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 161
- 239000000446 fuel Substances 0.000 title claims abstract description 116
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005485 electric heating Methods 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 38
- 239000007924 injection Substances 0.000 claims description 38
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000002828 fuel tank Substances 0.000 claims description 6
- 239000003502 gasoline Substances 0.000 abstract description 13
- 230000006835 compression Effects 0.000 abstract description 4
- 238000007906 compression Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/125—Fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
-
- 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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/16—Other apparatus for heating fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
- F02N19/04—Aiding engine start by thermal means, e.g. using lighted wicks by heating of fluids used in engines
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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
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a method for preheating methanol automobile fuel, which comprises the following steps: in the cold starting process of the vehicle, the methanol fuel entering the fuel injector 17 is preheated by utilizing electric heating through a preheating system; during normal running of the vehicle, the methanol fuel entering the fuel injector 17 is preheated by the preheating system by using high-temperature exhaust gas of the engine 1. According to the invention, the gasoline-methanol dual-fuel is changed into methanol fuel, an independent gasoline supply system is not needed, the cost is reduced, the designed compression ratio of the engine is further increased, and the dynamic property and the thermal efficiency of the engine are improved; after the engine is started in a cold mode, the methanol fuel is preheated by adopting high-temperature exhaust gas of the engine, so that the effects of recovering the exhaust energy of the engine and improving the energy conversion efficiency are achieved.
Description
Technical Field
The invention relates to the technical field of automobile engines, in particular to a method for preheating methanol automobile fuel.
Background
The fuel used by the traditional engine is mainly gasoline and diesel, but with the increasing shortage of petroleum resources and the increasing strictness of emission regulations, the development and application of clean alternative fuels for the engine are urgent. The methanol has the characteristics of high oxygen content, high combustion speed and the like, can obviously improve the combustion process in an engine cylinder, improve the combustion efficiency, effectively reduce the emission of carbon smoke particles, and simultaneously has small molecular weight and small hydrocarbon ratio, and less water and CO can be generated after the fuel with the same mass is combusted 2 Is a potential alternative fuel for engines.
In recent years, methanol has been widely used as an alternative fuel for engines, but since methanol itself has a much higher vaporization latent heat than gasoline and diesel, it has a problem of being difficult to burn at cold start or at a low ambient temperature.
The problem of difficult cold start of the methanol automobile is solved by adopting a gasoline and methanol dual-fuel technology. The technology requires that the vehicle is provided with two fuels, namely gasoline and methanol, and the gasoline is used as the fuel to be sprayed into a cylinder for combustion during the cold start of the vehicle, and the methanol is used as the fuel to be sprayed into the cylinder after the combustion temperature in the cylinder is greatly increased, so that the rapid atomization and the normal combustion of the methanol are realized. However, the gasoline and methanol dual-fuel engine needs to be compatible with the combustion of two fuels, so that the compression ratio of the engine is designed mainly according to the characteristics of gasoline, and the methanol is relatively smaller in the combustion process, so that the dynamic property and the thermal efficiency are reduced, and the industrial popularization and application of the methanol fuel are not facilitated.
Disclosure of Invention
The invention aims to provide a method for preheating methanol automobile fuel, which solves the problems that the existing gasoline and methanol dual-fuel engine needs to be compatible with the combustion of two fuels, namely gasoline and methanol, and the dynamic property and the thermal efficiency are reduced.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a method for preheating methanol automotive fuel, comprising the steps of:
in the cold starting process of the vehicle, the methanol fuel entering the fuel injector is preheated by utilizing electric heating through a preheating system;
and in the normal running process of the vehicle, the methanol fuel entering the fuel injector is preheated by utilizing high-temperature exhaust of the engine through the preheating system.
Further, the preheating system comprises a first fuel injection pump, a second fuel injection pump, a post-treatment carrier, a control unit and a storage battery, the post-treatment carrier comprises an inner pipe and an outer pipe, the inner pipe is connected with an exhaust port of a methanol engine, fins are arranged on the outer wall of the inner pipe at intervals, a preheating layer is formed between the inner pipe and the outer sleeve, one axial end of the preheating layer is sealed, a heating plate is arranged at the other axial end of the preheating layer, the preheating layer is provided with a fuel inlet, a fuel outlet and a temperature sensor, the fuel inlet is connected with the first fuel injection pump through a first connecting pipe, the first fuel injection pump is connected with the methanol fuel tank through a second connecting pipe, the fuel outlet is connected with the second fuel injection pump through a third connecting pipe, the second fuel injection pump is connected with a fuel injector through a fourth connecting pipe, the first connecting pipe and the third connecting pipe are all provided with electromagnetic valves, and the first fuel injection pump, the second fuel injection pump, the electromagnetic valve, the temperature sensor and the storage battery are all electrically connected with the control unit.
The beneficial effects of the invention are as follows:
(1) The gasoline-methanol dual fuel is changed into methanol fuel, an independent gasoline supply system is not needed, and the cost is reduced;
(2) Because the octane number of the gasoline is far lower than that of the methanol, and the compression ratio of the dual-fuel engine is designed mainly by referring to the characteristics of the gasoline, the dynamic property and the thermal efficiency are reduced because the compression ratio of the methanol is relatively smaller in the combustion process;
(3) After the engine is cold started, the methanol fuel is preheated by adopting high-temperature exhaust gas of the engine, so that the effects of recovering the exhaust energy of the engine and improving the energy conversion efficiency are achieved.
Drawings
FIG. 1 is a schematic diagram of a preheating system according to an embodiment of the present invention;
reference numerals in the drawings of the specification include: 1. an engine; 2. post-treating the carrier; 3. preheating the layer; 4. a fin; 5. a heating plate; 6. a fuel inlet; 7. a first connecting line; 8. a first fuel injection pump; 9. a second connecting pipeline; 10. a methanol fuel tank; 11. a control unit; 12. a storage battery; 13. a temperature sensor; 14. a fuel outlet; 15. a second electromagnetic valve; 16. a third connection pipe; 17. an oil injector; 18. a first electromagnetic valve; 19. a second fuel injection pump; 20. and a fourth connecting pipeline.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and embodiments:
a method for preheating methanol automotive fuel, comprising the steps of:
in the cold starting process of the vehicle, the methanol fuel entering the fuel injector 17 is preheated by utilizing electric heating through a preheating system;
during normal running of the vehicle, the methanol fuel entering the fuel injector 17 is preheated by the preheating system by using high-temperature exhaust gas of the engine 1.
As shown in fig. 1, the preheating system comprises a first fuel injection pump 8, a second fuel injection pump 19, a post-treatment carrier 2, a control unit 11 and a storage battery 12, wherein the post-treatment carrier 2 comprises an inner pipe and an outer pipe, the inner pipe is connected with an exhaust port of the methanol engine 1, fins 4 are arranged on the outer wall of the inner pipe at intervals, a preheating layer 3 is formed between the inner pipe and the outer sleeve, one axial end of the preheating layer 3 is sealed, a heating disc 5 is arranged on the other axial end of the preheating layer 3, the preheating layer 3 is provided with a fuel inlet 6, a fuel outlet 14 and a temperature sensor 13, the fuel inlet 6 is connected with the first fuel injection pump 8 through a first connecting pipeline 7, the first fuel injection pump 8 is connected with a methanol fuel tank 10 through a second connecting pipeline 9, the fuel outlet 14 is connected with the second fuel injection pump 19 through a third connecting pipeline 16, the second fuel injection pump 19 is connected with a fuel injector 17 through a fourth connecting pipeline 20, a first electromagnetic valve 18 and a second electromagnetic valve 15 are arranged on the first connecting pipeline 7 and the third connecting pipeline 16, and the first fuel injection pump 8, the second fuel injection pump 19, the electromagnetic valve 19, the temperature sensor 13 and the storage battery 12 are electrically connected with the control unit 11.
The working process is as follows:
during cold start of the vehicle, methanol is difficult to atomize and burn due to low in-cylinder temperature of the engine 1, so that it is necessary to preheat the methanol fuel entering the injector 17. The preheating process is as follows: the first fuel injection pump 8 is started, the first electromagnetic valve 18 is opened, the second electromagnetic valve 15 is closed, the methanol fuel in the methanol fuel tank 10 sequentially passes through the second connecting pipeline 9, the first fuel injection pump 8, the first connecting pipeline 7 and the first electromagnetic valve 18 under the action of the first fuel injection pump 8, finally enters the preheating layer 3 from the fuel inlet 6, and then the first electromagnetic valve 18 is closed. At this time, the control unit 11 activates the storage battery 12 to supply power to the heating pan 5, the fuel in the preheating layer 3 is heated by the heating pan 5 to rise in temperature, and the temperature thereof is measured in real time by the temperature sensor 13. After the temperature of the fuel rises to the set temperature, the heating plate 5 stops heating, the second electromagnetic valve 15 is opened, the second fuel injection pump 19 is started, and under the action of the second fuel injection pump 19, the methanol fuel in the preheating layer 3 sequentially enters the fuel injector 17 through the fuel outlet 14, the second electromagnetic valve 15, the third connecting pipe 16, the second fuel injection pump 19 and the fourth connecting pipe 20.
In the normal running process after the cold start of the vehicle, the temperature in the cylinder of the engine 1 is higher, so that the preheating requirement of the methanol fuel is reduced, and the methanol fuel is preheated by adopting high-temperature exhaust gas of the engine 1. The preheating process is as follows: the first fuel injection pump 8 is started, the first electromagnetic valve 18 and the second electromagnetic valve 15 are both opened, and the methanol fuel in the methanol fuel tank 10 sequentially passes through the second connecting pipeline 9, the first fuel injection pump 8, the first connecting pipeline 7 and the first electromagnetic valve 18 under the action of the fuel injection pump, and finally enters the preheating layer 3 from the fuel inlet 6. In the preheating layer 3, the methanol fuel absorbs heat from the high-temperature exhaust gas of the engine 1 entering the inner tube through the outer wall of the inner tube and the fins 4, and then flows out of the preheating layer 3 from the fuel outlet 14. Then the second fuel injection pump 19 is started, and under the action of the second fuel injection pump 19, the methanol fuel flowing out of the preheating layer 3 sequentially enters the fuel injector 17 through the second electromagnetic valve 15, the third connecting pipe 16, the second fuel injection pump 19 and the fourth connecting pipe 20.
The foregoing is merely exemplary of the present invention, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present invention, and these should also be regarded as the protection scope of the present invention, which does not affect the effect of the implementation of the present invention and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (2)
1. A method for preheating methanol automotive fuel, comprising the steps of:
in the cold starting process of the vehicle, the methanol fuel entering the fuel injector (17) is preheated by utilizing electric heating through a preheating system;
in the normal running process of the vehicle, the methanol fuel entering the fuel injector (17) is preheated by utilizing high-temperature exhaust of the engine (1) through the preheating system.
2. The method for methanol automotive fuel preheating of claim 1, characterized by: the preheating system comprises a first fuel injection pump (8), a second fuel injection pump (19), a post-treatment carrier (2), a control unit (11) and a storage battery (12), the post-treatment carrier (2) comprises an inner pipe and an outer pipe, the inner pipe is connected with an exhaust port of a methanol engine (1), fins (4) are arranged on the outer wall of the inner pipe at intervals, a preheating layer (3) is formed between the inner pipe and the outer sleeve, one axial end of the preheating layer (3) is sealed, a heating disc (5) is arranged at the other axial end of the preheating layer (3), the preheating layer (3) is provided with a fuel inlet (6), a fuel outlet (14) and a temperature sensor (13), the fuel inlet (6) is connected with the first fuel injection pump (8) through a first connecting pipe (7), the first fuel injection pump (8) is connected with a fuel tank (10) through a second connecting pipe (9), the fuel outlet (14) is connected with the second fuel injection pump (19) through a third connecting pipe (16), the second fuel injection pump (19) is connected with a fourth connecting pipe (20) through a fourth connecting pipe (17), and the first fuel injection pump (8) and the first fuel injection pump (19) are provided with a solenoid valve (8) The temperature sensor (13) and the storage battery (12) are electrically connected with the control unit (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310276192.8A CN116220973A (en) | 2023-03-21 | 2023-03-21 | Method for preheating methanol automobile fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310276192.8A CN116220973A (en) | 2023-03-21 | 2023-03-21 | Method for preheating methanol automobile fuel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116220973A true CN116220973A (en) | 2023-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310276192.8A Pending CN116220973A (en) | 2023-03-21 | 2023-03-21 | Method for preheating methanol automobile fuel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116220973A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2454554Y (en) * | 2000-10-12 | 2001-10-17 | 姜忠扬 | Air-intake heating type methyl alcohol engine |
| CN106481462A (en) * | 2016-11-21 | 2017-03-08 | 浙江吉利控股集团有限公司 | A kind of methanol engine cold start system |
| CN212318179U (en) * | 2020-04-30 | 2021-01-08 | 南方科技大学 | Ignition type methanol engine combustion system |
| CN112682223A (en) * | 2021-01-21 | 2021-04-20 | 太原理工大学 | Fuel alcohol system based on engine waste heat gasification methanol |
| US20210156321A1 (en) * | 2019-08-09 | 2021-05-27 | Tianjin University | Diesel methanol combined combustion engine and control method thereof |
-
2023
- 2023-03-21 CN CN202310276192.8A patent/CN116220973A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2454554Y (en) * | 2000-10-12 | 2001-10-17 | 姜忠扬 | Air-intake heating type methyl alcohol engine |
| CN106481462A (en) * | 2016-11-21 | 2017-03-08 | 浙江吉利控股集团有限公司 | A kind of methanol engine cold start system |
| US20210156321A1 (en) * | 2019-08-09 | 2021-05-27 | Tianjin University | Diesel methanol combined combustion engine and control method thereof |
| CN212318179U (en) * | 2020-04-30 | 2021-01-08 | 南方科技大学 | Ignition type methanol engine combustion system |
| CN112682223A (en) * | 2021-01-21 | 2021-04-20 | 太原理工大学 | Fuel alcohol system based on engine waste heat gasification methanol |
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