CN110529310B - High-melting-point fatty acid methyl ester or ethyl ester oil supply system - Google Patents
High-melting-point fatty acid methyl ester or ethyl ester oil supply system Download PDFInfo
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- CN110529310B CN110529310B CN201910903222.7A CN201910903222A CN110529310B CN 110529310 B CN110529310 B CN 110529310B CN 201910903222 A CN201910903222 A CN 201910903222A CN 110529310 B CN110529310 B CN 110529310B
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- pipeline
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- fatty acid
- acid methyl
- ethyl ester
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- 125000004494 ethyl ester group Chemical group 0.000 title claims abstract description 78
- 235000019387 fatty acid methyl ester Nutrition 0.000 title claims abstract description 66
- 239000010696 ester oil Substances 0.000 title claims abstract description 9
- 239000000446 fuel Substances 0.000 claims abstract description 36
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 34
- 239000002283 diesel fuel Substances 0.000 claims abstract description 32
- 239000003921 oil Substances 0.000 claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 18
- 239000007924 injection Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 239000000194 fatty acid Substances 0.000 claims description 12
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 10
- 229930195729 fatty acid Natural products 0.000 claims description 10
- 230000008054 signal transmission Effects 0.000 claims description 6
- 235000019198 oils Nutrition 0.000 description 22
- 238000002485 combustion reaction Methods 0.000 description 12
- 238000012546 transfer Methods 0.000 description 12
- 239000007788 liquid Substances 0.000 description 8
- 238000002844 melting Methods 0.000 description 6
- 230000008018 melting Effects 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003225 biodiesel Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009969 flowable effect Effects 0.000 description 2
- 239000010775 animal oil Substances 0.000 description 1
- 239000002551 biofuel Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0605—Control of components of the fuel supply system to adjust the fuel pressure or temperature
-
- 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
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
- F02M37/0029—Pressure regulator in the low pressure fuel system
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0064—Layout or arrangement of systems for feeding fuel for engines being fed with multiple fuels or fuels having special properties, e.g. bio-fuels; varying the fuel composition
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
-
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
-
- 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)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a high-melting-point fatty acid methyl ester or ethyl ester oil supply system, which comprises a double-acting hydraulic cylinder, a high-pressure diesel oil supply unit, a low-pressure fatty acid methyl ester or ethyl ester supply unit and a fatty acid methyl ester or ethyl ester in-cylinder direct injection unit, wherein the double-acting hydraulic cylinder is connected with the high-pressure diesel oil supply unit; the double-acting hydraulic cylinder comprises a hydraulic cylinder body, an end cover, a T-shaped piston, a separation block and a piston; the high-pressure diesel supply unit comprises a diesel tank, a first fuel filter, a high-pressure diesel pump, a first pressure stabilizing cavity, a pressure regulating valve, a two-position four-way electromagnetic valve, a first fuel pump and a second fuel pump; the low pressure fatty acid methyl ester or ethyl ester supply unit includes a fatty acid methyl ester or ethyl ester tank; the fatty acid methyl ester or ethyl ester box is provided with a second thermocouple heating rod, a filter layer and a first thermocouple heating rod; the direct injection unit in the fatty acid methyl ester or ethyl ester cylinder comprises a second pressure stabilizing cavity and an in-cylinder direct injection oil sprayer. The invention indirectly controls the oil supply pressure of the fatty acid methyl ester or ethyl ester through the high-pressure diesel oil supply unit, thereby realizing continuous and circular supply of the fatty acid methyl ester or ethyl ester.
Description
Technical Field
The invention belongs to the field of internal combustion engines, and particularly relates to a fatty acid methyl ester or ethyl ester oil supply system for an internal combustion engine, which has high melting point, poor fluidity and poor lubricity.
Background
With the increasing increase of environmental pollution and energy shortage, the utilization of renewable energy sources that can realize efficient clean combustion of internal combustion engines has become one of the important subjects. The biodiesel is used as clean biofuel capable of replacing petroleum diesel, has good environmental characteristics and biodegradability, has wide development prospect, and is very beneficial to combustion of an internal combustion engine.
The biodiesel is mainly C12-C22 fatty acid methyl ester or ethyl ester from chemical composition, and can be produced by esterification reaction of animal and vegetable oil and short-chain alcohol (methanol, ethanol, etc.). The fatty acid methyl ester or ethyl ester has the characteristics of high melting point, poor fluidity, poor lubricity and the like, and is difficult to be sprayed into an internal combustion engine cylinder to form a combustible mixed gas by using the conventional commercial oil supply system, so that the research work such as the influence of the fatty acid methyl ester or ethyl ester on the performance of the internal combustion engine is prevented from being smoothly carried out. Therefore, in order to comprehensively and comprehensively study the influence rule of fatty acid methyl ester or ethyl ester on the combustion and emission performance of an internal combustion engine, it is necessary to design a high-melting-point fatty acid methyl ester or ethyl ester oil supply system capable of reliably working at normal temperature and normal pressure.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a high-melting-point fatty acid methyl ester or ethyl ester oil supply system which can realize reliable injection of the fatty acid methyl ester or ethyl ester with a high melting point in an air cylinder of an internal combustion engine.
In order to solve the technical problems, the invention adopts the following technical scheme: the high-melting-point fatty acid methyl ester or ethyl ester oil supply system comprises a double-acting hydraulic cylinder, a high-pressure diesel oil supply unit, a low-pressure fatty acid methyl ester or ethyl ester supply unit and a fatty acid methyl ester or ethyl ester in-cylinder direct injection unit;
the double-acting hydraulic cylinder comprises a hydraulic cylinder body, an end cover, a T-shaped piston, a separation block and a piston; the end cover is fixed on the hydraulic cylinder body through an end cover bolt; the T-shaped piston penetrates through the round hole of the separation block and forms a whole with the piston through a piston pin, and the separation block is fixed on the cylinder body of the hydraulic cylinder through a separation block bolt; the T-shaped piston, the separation block and the piston divide the double-acting hydraulic cylinder into 4 airtight chambers, namely a first chamber, a second chamber, a third chamber and a fourth chamber, wherein the second chamber is communicated with the pipeline A, and the third chamber is communicated with the pipeline B; the cylinder body of the hydraulic cylinder is provided with a first exhaust device and a second exhaust device.
The high-pressure diesel supply unit comprises a diesel tank, a first fuel filter, a high-pressure diesel pump, a first pressure stabilizing cavity, a pressure regulating valve, a two-position four-way electromagnetic valve, a first fuel pump and a second fuel pump; the two-position four-way electromagnetic valve is controlled by the electromagnetic valve controller and is respectively connected with the first diesel pipeline, the second diesel pipeline, the A pipeline and the B pipeline; a first fuel filter, a high-pressure diesel pump and a first pressure stabilizing cavity are arranged on the first diesel pipeline; the first pressure stabilizing cavity is provided with a pressure regulating valve which is communicated with the diesel tank through an oil return pipeline; the first diesel pipeline and the second diesel pipeline are respectively communicated with the diesel tank; the pipeline A and the pipeline B are respectively provided with a first oil transfer pump and a second oil transfer pump.
The low pressure fatty acid methyl or ethyl ester supply unit includes a fatty acid methyl or ethyl ester tank; the upper layer of the fatty acid methyl ester or ethyl ester box is provided with a second thermocouple heating rod, the middle is provided with a filter layer, and the lower layer is provided with a first thermocouple heating rod; the one end outlet of the fatty acid methyl ester or ethyl ester box is communicated with the first cavity through a first pipeline, a first one-way valve, a second fuel filter and a third fuel pump are arranged on the first pipeline, the other end outlet is communicated with the fourth cavity through a second pipeline, and a second one-way valve, a third fuel filter and a fourth fuel pump are arranged on the second pipeline.
The direct injection unit in the fatty acid methyl ester or ethyl ester cylinder comprises a second pressure stabilizing cavity and an in-cylinder direct injection oil sprayer; the second pressure stabilizing cavity is respectively communicated with the first cavity and the fourth cavity through a third pipeline and a fourth pipeline; a third one-way valve is arranged on the third pipeline, and a fourth one-way valve is arranged on the fourth pipeline; the second pressure stabilizing cavity is connected with the in-cylinder direct injection fuel injector through a high-pressure fuel pipe; a pressure sensor is arranged on the second pressure stabilizing cavity, and is connected with the electromagnetic valve controller through a signal transmission line to feed back signals to the electromagnetic valve controller; and a third exhaust device is also arranged on the second voltage stabilizing cavity.
Further, the double-acting hydraulic cylinder has the following structural size requirements: as shown in fig. 2, when the T-shaped piston is located at any position in the cylinder body of the hydraulic cylinder, the distance a from the left end surface of the T-shaped piston to the left step surface of the cylinder body of the hydraulic cylinder should be equal to the distance c from the left end surface of the piston to the right side surface of the B pipeline, i.e. a=c; the distance b from the right end face of the T-shaped piston to the left side face of the a-tube should be equal to the distance d from the right end face of the piston to the left step face of the end cover, i.e. b=d.
Further, a layer of gasket is arranged at the contact part of the hydraulic cylinder body and the end cover.
Compared with the prior art, the invention has the beneficial effects that: the liquefied supply of fatty acid methyl ester or ethyl ester with higher melting point can be realized, the liquefied supply of fatty acid methyl ester or ethyl ester can be reliably sprayed into a cylinder of an internal combustion engine to be evaporated and atomized to be mixed with air, and the oil supply pressure of fatty acid methyl ester or ethyl ester can be indirectly controlled through a high-pressure diesel oil supply unit; the system is simple to operate, and continuous and circular supply of fatty acid methyl ester or ethyl ester can be realized.
Drawings
FIG. 1 is a schematic diagram of a high melting point fatty acid methyl or ethyl ester oil supply system according to the present invention.
Fig. 2 is a schematic diagram of a double-acting hydraulic cylinder structure in the present invention.
In the figure: 1-a diesel tank; 2-a first fuel filter; 3-a high-pressure diesel pump; 4-a first voltage stabilizing cavity; 5-a pressure regulating valve; 6-an oil return pipeline; 7-a first diesel pipeline; 8-a second diesel pipeline; 9-a two-position four-way electromagnetic valve; 10-solenoid valve controller; 11-signal transmission lines; a 12-B pipeline; 13-A pipeline; 14-a first oil transfer pump; 15-a second oil transfer pump; 16-double acting hydraulic cylinder; 17-a hydraulic cylinder body; 18-end caps; 19-a gasket; a 20-T type piston; 21-a separation block; 22-piston pin; 23-a piston; 24-a first chamber; 25-a second chamber; 26-a third chamber; 27-a fourth chamber; 28-separating block bolts; 29-end cap bolts; 30-a first exhaust; 31-a second exhaust; 32-a first line; 33-a first one-way valve; 34-a second fuel filter; 35-a third oil transfer pump; a 36-fatty acid methyl or ethyl ester tank; 37-a first thermocouple heating rod; 38-a filter layer; 39-a second thermocouple heating rod; a 40-fatty acid methyl ester or ethyl ester inlet; 41-a third line; 42-a third one-way valve; 43-a second line; 44-a second one-way valve; 45-a third fuel filter; 46-a fourth oil transfer pump; 47-fourth line; 48-a fourth one-way valve; 49-a pressure sensor; 50-a second voltage stabilizing cavity; 51-a third exhaust; 52-high pressure oil pipe; 53-in-cylinder direct injection injector.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
In the invention, as shown in fig. 1 and 2, a T-shaped piston 20 firstly passes through a round hole in the middle of a separation block 21, a clearance fit is formed between a T-shaped piston rod and the round hole, and the T-shaped piston rod can freely move left and right in the round hole; then, the piston pin 22 for a T-shaped piston rod is fitted into the pin hole of the piston 23, and four parts constitute an assembly. An assembly of four parts is placed into the cylinder block 17 from the right, and a first exhaust device 30 and a second exhaust device 31 are provided on the cylinder block 17 for exhaust. The separation block 21 is fixed on the hydraulic cylinder body 17 by using separation block bolts 28 (8 in each row and uniformly distributed along the circumferential direction of the hydraulic cylinder body 17), and the separation block 21 and the hydraulic cylinder body 17 are in clearance fit. The hydraulic cylinder body 17 and the end cover 18 are fastened by adopting end cover bolts 29 (8, uniformly distributed along the circumference), and a gasket 19 is arranged between the hydraulic cylinder body 17 and the end cover 18 to prevent leakage. The T-shaped piston 20, the piston 23 and the hydraulic cylinder body 17 are in clearance fit, and can freely move left and right in the hydraulic cylinder body 17. To this end, double acting hydraulic cylinder 16 is divided into four chambers, first chamber 24, second chamber 25, third chamber 26 and fourth chamber 27. The second chamber 25 communicates with the a line 13 and the third chamber 26 communicates with the B line 12. The first oil transfer pump 14 and the second oil transfer pump 15 are respectively arranged on the pipeline A13 and the pipeline B12.
The two-position four-way electromagnetic valve 9 is arranged between the diesel tank 1 and the double-acting hydraulic cylinder 16, the upper side is connected with the pipeline A13 and the pipeline B12, and the lower side is connected with the first diesel pipeline 7 and the second diesel pipeline 8; the first diesel pipeline 7 and the second diesel pipeline 8 are communicated with the diesel tank 1, and a first fuel filter 2, a high-pressure diesel pump 3 and a first pressure stabilizing cavity 4 are arranged on the first diesel pipeline 7; the first pressure stabilizing cavity 4 is provided with a pressure regulating valve 5, and the pressure regulating valve 5 is communicated with the diesel tank 1 through an oil return pipeline 6. The two-position four-way electromagnetic valve 9 is also connected with the electromagnetic valve controller 10, and the electromagnetic valve controller 10 is connected with the pressure sensor 49 through the signal transmission line 11, so that the two-position four-way electromagnetic valve 9 is controlled to perform reversing through pressure feedback.
The first chamber 24 and the fourth chamber 27 of the double-acting hydraulic cylinder 16 are respectively communicated with a fatty acid methyl ester or ethyl ester tank 36 through a first pipeline 32 and a second pipeline 43, a first check valve 33, a second fuel filter 34 and a third fuel pump 35 are arranged on the first pipeline 32, and a second check valve 44, a third fuel filter 45 and a fourth fuel pump 46 are arranged on the second pipeline 43;
the upper end of the fatty acid methyl ester or ethyl ester tank 36 is provided with an inlet 40 through which the fatty acid methyl ester or ethyl ester is added; the fatty acid methyl ester or ethyl ester tank 36 is also internally provided with a filter layer 38, a second thermocouple heating rod 39 is arranged above the filter layer 38 and is used for heating the fatty acid methyl ester or ethyl ester with high melting point and poor fluidity on the filter layer 38, and the fatty acid methyl ester or ethyl ester flows to the bottom of the fatty acid methyl ester or ethyl ester tank 36 through the filter layer 38 after being melted into a liquid state. A first thermocouple heating rod 37 is provided at the bottom of the fatty acid methyl ester or ethyl ester tank 36 for heating the fatty acid methyl ester or ethyl ester at the bottom to keep it in a liquid state.
The first chamber 24 and the fourth chamber 27 of the double-acting hydraulic cylinder 16 are also communicated with the second pressure stabilizing cavity 50 through a third pipeline 41 and a fourth pipeline 47; the second pressure stabilizing cavity 50 is connected with a direct injection in-cylinder injector 53 through a high-pressure oil pipe 52; the third pipeline 41 and the fourth pipeline 47 are respectively provided with a third check valve 42 and a fourth check valve 48; the second pressure stabilizing cavity 50 is provided with a third exhaust device 51 and a pressure sensor 49, and the pressure sensor 49 is connected with the solenoid valve controller 10 through a signal transmission line 11.
Before the device of the invention works, fatty acid methyl ester or ethyl ester is firstly added into a fatty acid methyl ester or ethyl ester box 36 through an adding inlet 40; then, the second thermocouple heating rod 39 starts heating the fatty acid methyl ester or ethyl ester, and when the fatty acid methyl ester or ethyl ester is melted into a flowable liquid by heating, the flowable liquid flows into the bottom of the fatty acid methyl ester or ethyl ester tank 36 through the filter layer 38, and the first thermocouple heating rod 37 starts heating and insulating the fatty acid methyl ester or ethyl ester, so that the fatty acid methyl ester or ethyl ester is kept in a liquid state at the moment.
Next, the air in the device is evacuated, the operation is as follows:
1. the third exhaust device 51 is opened, and the third transfer pump 35 and the fourth transfer pump 46 are manually operated to pressurize the liquid fatty acid methyl ester or ethyl ester. The fatty acid methyl ester or ethyl ester at the left side in the fatty acid methyl ester or ethyl ester tank 36 sequentially enters the first chamber 24 and the third pipeline 41 from the first pipeline 32 through the third oil delivery pump 35, the second fuel filter 34 and the first one-way valve 33, and then enters the second pressure stabilizing cavity 50 from the third pipeline 41 through the third one-way valve 42; the fatty acid methyl ester or ethyl ester on the right side of the fatty acid methyl ester or ethyl ester tank 36 sequentially enters the fourth chamber 27 and the fourth pipeline 47 from the second pipeline 43 through the fourth oil transfer pump 46, the third fuel filter 45 and the second one-way valve 44, and then enters the second pressure stabilizing cavity 50 from the fourth pipeline 47 through the fourth one-way valve 48. When the third exhaust device 51 starts draining, the operation of the third and fourth oil delivery pumps 35 and 46 is stopped, and the third exhaust device 51 is closed. Thereby effecting the evacuation of air in the first line 32, the second line 43, the first chamber 24, the fourth chamber 27, the third line 41, the fourth line 47 and the second manostat 50 and the filling of fatty acid methyl or ethyl esters.
2. The two-position four-way electromagnetic valve 9 is returned to an initial position by the electromagnetic valve controller 10 (the initial position is that the pipeline A13 is communicated with the first diesel pipeline 7, and the pipeline B12 is communicated with the second diesel pipeline 8). The first and second exhaust devices 30 and 31 are opened, and the first and second fuel pumps 14 and 15 are manually operated to pressurize the diesel fuel. On the one hand, diesel oil enters the second chamber 25 from the first diesel oil pipeline 7 through the first fuel filter 2, the high-pressure diesel pump 3, the first pressure stabilizing cavity 4, the two-position four-way electromagnetic valve 9, the pipeline A13 and the first oil delivery pump 14; on the other hand, diesel will enter the third chamber 26 from the second diesel line 8 via the two-position four-way solenoid valve 9, the B line 12 and the second transfer pump 15. When the first and second exhaust devices 30 and 31 start draining, the operation of the first and second oil delivery pumps 14 and 15 is stopped, and the first and second exhaust devices 30 and 31 are closed. Thereby realizing the evacuation of air in the first diesel fuel line 7, the second diesel fuel line 8, the first manostat 4, the a line 13, the B line 12, the second chamber 25 and the third chamber 26 and the filling of diesel fuel.
When the device works, the device sequentially and circularly works according to the following steps:
3. the electromagnetic valve controller 10 is used for controlling the two-position four-way electromagnetic valve 9 to return to an initial position (namely, the pipeline A13 is communicated with the first diesel pipeline 7, the pipeline B12 is communicated with the second diesel pipeline 8), and the high-pressure diesel pump 3 is started. Diesel oil flows out from the diesel oil tank 1 under the action of the high-pressure diesel oil pump 3, passes through the first fuel oil filter 2, the high-pressure diesel oil pump 3, the first pressure stabilizing cavity 4 and the two-position four-way electromagnetic valve 9 in the first diesel oil pipeline 7, and enters the second cavity 25 of the double-acting hydraulic cylinder 16 from the pipeline A13. The pressure regulating valve 5 installed on the first pressure regulating chamber 4 has the function of regulating the diesel pressure. When the diesel pressure is less than or equal to the set target pressure P MPa, the pressure regulating valve 5 is closed; when the pressure of the diesel oil is larger than the set target pressure P MPa, the pressure regulating valve 5 is opened, and the diesel oil flows back to the diesel oil tank 1 through the oil return pipeline 6; thereby always maintaining the diesel pressure in the first surge tank 4 at the set target pressure P MPa. The T-piston 20 is moved leftwards by the high pressure diesel fuel in the second chamber 25 to pressurize the fatty acid methyl or ethyl ester in the first chamber 24. The pressurized fatty acid methyl ester or ethyl ester enters the second pressure stabilizing chamber 50 through the third check valve 42 in the third pipeline 41, is stabilized in pressure (target pressure P MPa) in the second pressure stabilizing chamber 50, and is injected into the engine cylinder through the in-cylinder direct injection injector 53. At the same time, the T-shaped piston 20 drives the piston 23 to move leftwards, so that the volume of the fourth chamber 27 is increased, negative pressure is generated, and liquid fatty acid methyl ester or ethyl ester is sucked into the fourth chamber 27 from the fatty acid methyl ester or ethyl ester tank 36 through the second pipeline 43, so that the fourth chamber 27 is kept full of fatty acid methyl ester or ethyl ester all the time. In addition, the T-shaped piston 20 drives the piston 23 to move leftwards, so that the volume of the third chamber 26 is reduced, and diesel oil in the third chamber 26 flows back to the diesel oil tank 1 through the B pipeline 12, the two-position four-way electromagnetic valve 9 and the second diesel oil pipeline 8. When the T-shaped piston 20 moves leftwards to be engaged with the left stepped surface of the hydraulic cylinder block 17, the T-shaped piston 20 cannot continuously pressurize the fatty acid methyl ester or ethyl ester in the first chamber 24, and the in-cylinder direct injection injector 53 still injects the fatty acid methyl ester or ethyl ester into the engine cylinder, and the pressure in the second regulated pressure chamber 50 starts to drop. When the electromagnetic valve controller 10 receives that the feedback pressure of the pressure sensor 49 is less than or equal to (P-3) MPa through the signal transmission line 11, the two-position four-way electromagnetic valve 9 is controlled to be reversed, so that the pipeline A13 is communicated with the second diesel pipeline 8, and the pipeline B12 is communicated with the first diesel pipeline 7.
4. At this time, diesel oil flows out from the diesel tank 1 under the action of the high-pressure diesel pump 3, passes through the first fuel filter 2, the high-pressure diesel pump 3, the first pressure stabilizing chamber 4 and the two-position four-way electromagnetic valve 9 in the first diesel pipeline 7, and enters the third chamber 26 of the double-acting hydraulic cylinder 16 from the B pipeline 12. And the pressure regulating valve 5 mounted on the first pressure regulating chamber 4 always keeps the diesel pressure in the first pressure regulating chamber 4 at the set target pressure P MPa. Movement of the piston 23 to the right under the influence of the high pressure diesel fuel in the third chamber 26 pressurizes the fatty acid methyl or ethyl ester in the fourth chamber 27. The pressurized fatty acid methyl ester or ethyl ester enters the second pressure stabilizing cavity 50 through the fourth check valve 48 in the fourth pipeline 47, is stabilized in pressure (target pressure P MPa) in the second pressure stabilizing cavity 50, and is injected into the engine cylinder through the in-cylinder direct injection injector 53. At the same time, the piston 23 drives the T-shaped piston 20 to move rightwards, so that the volume of the first chamber 24 is increased, negative pressure is generated, and liquid fatty acid methyl ester or ethyl ester is sucked into the first chamber 24 from the fatty acid methyl ester or ethyl ester tank 36 through the first pipeline 32, so that the first chamber 24 is kept full of fatty acid methyl ester or ethyl ester all the time. In addition, the piston 23 drives the T-shaped piston 20 to move rightwards, so that the volume of the second chamber 25 is reduced, and diesel oil in the second chamber 25 flows back to the diesel oil tank 1 through the B pipeline 12, the two-position four-way electromagnetic valve 9 and the second diesel oil pipeline 8. When piston 23 moves to the right to engage the stepped surface of end cap 18, piston 23 will not continue to pressurize the fatty acid methyl or ethyl ester in fourth chamber 27, while in-cylinder direct injection injector 53 still injects the fatty acid methyl or ethyl ester into the engine cylinder and the pressure in second regulated chamber 50 will begin to drop. When the electromagnetic valve controller 10 receives that the feedback pressure of the pressure sensor 49 is less than or equal to (P-3) MPa through the signal transmission line 11, the two-position four-way electromagnetic valve 9 is controlled to be reversed, so that the two-position four-way electromagnetic valve 9 returns to the initial position, namely, the pipeline A13 is communicated with the first diesel pipeline 7, and the pipeline B12 is communicated with the second diesel pipeline 8.
5. The working procedure of step 3 is repeated.
Claims (1)
1. The high-melting-point fatty acid methyl ester or ethyl ester oil supply system is characterized by comprising a double-acting hydraulic cylinder, a high-pressure diesel oil supply unit, a low-pressure fatty acid methyl ester or ethyl ester supply unit and a fatty acid methyl ester or ethyl ester in-cylinder direct injection unit;
the double-acting hydraulic cylinder (16) comprises a hydraulic cylinder body (17), an end cover (18), a T-shaped piston (20), a separation block (21) and a piston (23); the end cover (18) is fixed on the hydraulic cylinder body (17) through an end cover bolt (29); the T-shaped piston (20) passes through a round hole of the separation block (21) and forms a whole with the piston (23) through a piston pin (22), and the separation block (21) is fixed on the hydraulic cylinder body (17) through a separation block bolt (28); the T-shaped piston (20), the separation block (21) and the piston (23) divide the double-acting hydraulic cylinder (16) into 4 airtight chambers, namely a first chamber (24), a second chamber (25), a third chamber (26) and a fourth chamber (27), wherein the second chamber (25) is communicated with the pipeline A (13), and the third chamber (26) is communicated with the pipeline B (12); a first exhaust device (30) and a second exhaust device (31) are arranged on the hydraulic cylinder body (17);
the high-pressure diesel supply unit comprises a diesel tank (1), a first fuel filter (2), a high-pressure diesel pump (3), a first pressure stabilizing cavity (4), a pressure regulating valve (5), a two-position four-way electromagnetic valve (9), a first fuel pump (14) and a second fuel pump (15); the two-position four-way electromagnetic valve (9) is controlled by an electromagnetic valve controller (10), and the two-position four-way electromagnetic valve (9) is respectively connected with a first diesel pipeline (7), a second diesel pipeline (8), an A pipeline (13) and a B pipeline (12); a first fuel filter (2), a high-pressure diesel pump (3) and a first pressure stabilizing cavity (4) are arranged on the first diesel pipeline (7); a pressure regulating valve (5) is arranged on the first pressure stabilizing cavity (4), and the pressure regulating valve (5) is communicated with the diesel tank (1) through an oil return pipeline (6); the first diesel oil pipeline (7) and the second diesel oil pipeline (8) are respectively communicated with the diesel oil tank (1); a first oil delivery pump (14) and a second oil delivery pump (15) are respectively arranged on the pipeline A (13) and the pipeline B (12);
the low pressure fatty acid methyl or ethyl ester supply unit includes a fatty acid methyl or ethyl ester tank (36); the upper layer of the fatty acid methyl ester or ethyl ester box (36) is provided with a second thermocouple heating rod (39), the middle is provided with a filter layer (38), and the lower layer is provided with a first thermocouple heating rod (37); one end outlet of the fatty acid methyl ester or ethyl ester box (36) is communicated with the first cavity (24) through a first pipeline (32), a first one-way valve (33), a second fuel filter (34) and a third fuel pump (35) are arranged on the first pipeline (32), the other end outlet is communicated with the fourth cavity (27) through a second pipeline (43), and a second one-way valve (44), a third fuel filter (45) and a fourth fuel pump (46) are arranged on the second pipeline (43);
the direct injection unit in the fatty acid methyl ester or ethyl ester cylinder comprises a second pressure stabilizing cavity (50) and an in-cylinder direct injection oil sprayer (53); the second pressure stabilizing cavity (50) is communicated with the first cavity (24) and the fourth cavity (27) through a third pipeline (41) and a fourth pipeline (47) respectively; a third one-way valve (42) is arranged on the third pipeline (41), and a fourth one-way valve (48) is arranged on the fourth pipeline (47);
the second pressure stabilizing cavity (50) is connected with a direct injection fuel injector (53) in the cylinder through a high-pressure fuel pipe (52); a pressure sensor (49) is arranged on the second pressure stabilizing cavity (50), and the pressure sensor (49) is connected with the electromagnetic valve controller (10) through a signal transmission line (11) to feed back signals to the electromagnetic valve controller (10); a third exhaust device (51) is also arranged on the second pressure stabilizing cavity (50);
the double-acting hydraulic cylinder (16) has the following structural size requirements: when the T-shaped piston (20) is positioned at any position in the hydraulic cylinder body (17), the distance a from the left end surface of the T-shaped piston (20) to the left step surface of the hydraulic cylinder body (17) is equal to the distance c from the left end surface of the piston (23) to the right side surface of the B pipeline (12), namely a=c; the distance b from the right end surface of the T-shaped piston (20) to the left side surface of the pipeline A (13) is equal to the distance d from the right end surface of the piston (23) to the left step surface of the end cover (18), namely b=d;
a gasket layer (19) is arranged at the contact part of the hydraulic cylinder body (17) and the end cover (18).
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