CN112177814A - Biodiesel oil injection preheating high-pressure common rail injection system - Google Patents
Biodiesel oil injection preheating high-pressure common rail injection system Download PDFInfo
- Publication number
- CN112177814A CN112177814A CN202011034806.4A CN202011034806A CN112177814A CN 112177814 A CN112177814 A CN 112177814A CN 202011034806 A CN202011034806 A CN 202011034806A CN 112177814 A CN112177814 A CN 112177814A
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- Prior art keywords
- oil
- biodiesel
- common rail
- preheating
- preheating device
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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
- 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
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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
- 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
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
Abstract
The invention relates to a biodiesel oil injection preheating high-pressure common rail injection system, which comprises an oil tank filled with biodiesel, a filter, a preheating device, a high-pressure oil pump, a common rail pipe, an oil injector and a preheating device control module; the oil tank, the filter, the preheating device, the high-pressure oil pump, the common rail pipe and the oil injector are sequentially connected, and the preheating device control module is connected with the preheating device; the biodiesel is output from the oil tank, passes through the filter and then is input into the preheating device, the preheating device heats the biodiesel to be within a set threshold value, and then the biodiesel is output from the preheating device to the high-pressure oil pump, is heated, flows through the common rail pipe and is sprayed through the oil sprayer. Compared with the prior art, the invention has the advantages of improving the spray combustion quality of the biodiesel, reducing the generation of particulate matters and carbon deposition, having good compatibility and the like.
Description
Technical Field
The invention relates to the technical field of biodiesel injection of engines, in particular to a biodiesel injection preheating high-pressure common rail injection system.
Background
The biodiesel has the characteristics of high viscosity and high oxygen content compared with diesel oil, so that carbon deposition and NO exist in the actual combustion processxAnd the emission of pollutants is improved. The source of this problem is caused by the coanda oil film that is generated on the cylinder wall and the piston wall in the portion of poor atomization of biodiesel during in-cylinder combustion.
In the actual working process of the diesel engine, the temperature after the compression is ended can reach above 700-800K, and the temperature of the injection outlet of the biodiesel passing through a high-pressure common rail system (under the condition of about 100 MPa) is generally 40-60 ℃. The biodiesel spraying at the temperature is not beneficial to evaporation and mixing in a high-temperature environment due to the high speed generated by high oil injection pressure, so that the penetration distance and the volume of the injected liquid are larger, and liquid phase collision is extremely easy to occur in a compact combustion chamber, thereby generating a wall-attached oil film.
The heating device is integrated into the high-pressure common rail system, the biodiesel is heated to 70 ℃ by resistance wire heating, and the further pressurization and temperature rise of the high-pressure common rail system can reach at least 100 ℃ of high-temperature injection fuel (above 380K). The fuel oil with the temperature of more than 380K can be quickly evaporated and mixed after being injected by a high-pressure common rail system, the penetration length of the oil mist liquid phase is greatly reduced, the possibility that the biodiesel liquid drops collide the wall to form a wall attachment oil film is reduced, the generation of carbon deposition is reduced, and NO is reducedxAnd the emission is favorable for clean combustion and engine maintenance.
The heating system described in patent CN110529304 is to send fuel oil into an engine by heating, so as to improve the thermal efficiency and make the engine heat be recycled, and the purpose of the heating system is to reduce the oil consumption. The heating device described in patent CN109973268 is integrated with an oil injector, and the fuel oil spraying quality is improved by heating the inside of the oil injector and controlling the temperature. The heating system described in patent CN109435637 aims at preventing the fuel from cryocondensing and not at improving the spray combustion quality.
The existing patents are different from the conventional high-pressure common rail system of the diesel engine, the existing patents have incompatible performances, and aiming at the characteristic that the biodiesel replaces fuel, the poor emission conditions such as carbon smoke, carbon deposit and the like after combustion cannot be directly changed through the heating mode, and the spray combustion quality cannot be improved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the biodiesel oil injection preheating high-pressure common rail injection system which improves the biodiesel spray combustion quality, reduces the generation of particulate matters and carbon deposition and has good compatibility.
The purpose of the invention can be realized by the following technical scheme:
a biodiesel oil injection preheating high-pressure common rail injection system is characterized by comprising an oil tank filled with biodiesel, a filter, a preheating device, a high-pressure oil pump, a common rail pipe, an oil injector and a preheating device control module;
the oil tank, the filter, the preheating device, the high-pressure oil pump, the common rail pipe and the oil injector are sequentially connected; the preheating device control module is connected with the preheating device;
the biodiesel is output from the oil tank, passes through the filter and then is input into the preheating device, the preheating device heats the biodiesel to be within a set threshold value, and then the biodiesel is output from the preheating device to the high-pressure oil pump, is heated, flows through the common rail pipe and is sprayed through the oil sprayer.
Preferably, the preheating device comprises a shell, a heating resistance wire and an oil conveying inner pipe; the oil conveying inner pipe penetrates through the shell, one end of the oil conveying inner pipe is connected with the filter, and the other end of the oil conveying inner pipe is connected with the high-pressure oil pump; the heating resistance wire is arranged in the shell and wound on the oil conveying inner pipe.
More preferably, the housing is a metal housing.
More preferably, the oil conveying inner pipe is a stainless steel pipeline.
More preferably, the preheating device is in a range of [3cm,5cm ] along the length of the oil conveying inner pipe.
More preferably, the heating resistance wires are heated in a multi-stage parallel mode.
More preferably, the preheating device control module comprises an ECU, a temperature sensor, a power supply module and an electric control switch; the temperature sensor is connected with the ECU; the input end of the electric control switch is connected with the power module, the output end of the electric control switch is connected with the heating resistance wire, and the control end of the electric control switch is connected with the ECU; the temperature sensor is arranged at the output port of the preheating device.
More preferably, the power module is a storage battery.
More preferably, the electric control switch is a relay.
Preferably, after the preheating device heats the biodiesel, the temperature threshold of the biodiesel is (70 ℃,80 ℃).
Compared with the prior art, the invention has the following advantages:
firstly, improving the spray combustion quality of the biodiesel: according to the biodiesel oil injection preheating high-pressure common rail injection system, the preheating device is arranged, the oil temperature of the biodiesel is heated to 70 ℃ and 80 ℃ in advance, the high-pressure oil pump further heats the oil temperature to be higher than 100 ℃ to obtain high-temperature injection fuel oil, the high-temperature fuel oil with the temperature of higher than 100 ℃ can be quickly evaporated and mixed after being injected by the oil injector, and the biodiesel spray combustion quality is greatly improved.
Secondly, reducing the generation of particles and carbon deposition: the oil temperature of the oil sprayer of the biodiesel oil spraying preheating high-pressure common rail injection system can reach 100 ℃, and high-temperature fuel oil with the temperature of more than 100 ℃ can be quickly evaporated and mixed after being sprayed by the oil sprayer, so that the penetration length of the liquid phase of the oil mist is greatly reduced, the possibility of forming a wall-attached oil film by the collision of biodiesel liquid drops on the wall is reduced, the generation of particles and carbon deposition is reduced, and the NO is reducedxAnd the emission is favorable for clean combustion and maintenance of the transmitter.
Thirdly, the compatibility is good: the biodiesel oil injection preheating high-pressure common rail injection system is additionally provided with the preheating device on the basis of the original high-pressure common rail injection system, the existing injection system components are not required to be improved, only the preheating device needs to be additionally arranged to the existing system, and the compatibility is good.
Drawings
FIG. 1 is a schematic structural diagram of a biodiesel injection preheating high-pressure common rail injection system according to the present invention;
FIG. 2 is a schematic diagram of a preheating apparatus according to the present invention.
The reference numbers in the figures indicate:
1. the fuel tank, 2, a filter, 3, a preheating device, 4, a high-pressure oil pump, 5, a common rail pipe, 6, an oil injector, 7, a preheating device control module, 301, a shell, 302, a heating resistance wire, 303, an oil conveying inner pipe, 701, an ECU, 702, a temperature sensor, 703, a power supply module, 704 and a relay.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
A biodiesel oil injection preheating high-pressure common rail injection system is structurally shown in figure 1 and comprises: the device comprises an oil tank 1 filled with biodiesel, a filter 2, a preheating device 3, a high-pressure oil pump 4, a common rail pipe 5, an oil sprayer 6 and a preheating device control module 7; the oil tank 1, the filter 2, the preheating device 3, the high-pressure oil pump 4, the common rail pipe 5 and the oil injector 6 are sequentially connected; the preheating device control module 7 is connected with the preheating device 3; biodiesel is output from an oil tank 1, passes through a filter 2 and then is input into a preheating device 3, the biodiesel is heated to a set threshold value by the preheating device 3, is output from the preheating device 3 to a high-pressure oil pump 4 and then is heated, flows through a common rail pipe 5 and is sprayed by an oil sprayer 6.
The preheating device 3 needs to heat the biodiesel to the temperature range of (70 ℃,80 ℃).
The structure of the preheating device 3 in this embodiment is as shown in fig. 2, and includes a casing 301, a heating resistance wire 302, and an oil conveying inner tube 303, where the oil conveying inner tube 303 passes through the casing 301, one end of the oil conveying inner tube is connected to the filter 2, and the other end of the oil conveying inner tube is connected to the high-pressure oil pump 4, and the heating resistance wire 302 is installed in the casing 301 and wound on the oil conveying inner tube 303.
The outer shell 301 is a metal outer shell, the oil conveying inner pipe 303 is a stainless steel pipeline, and the length range of the preheating device 3 along the oil conveying inner pipe 303 is [3cm,5cm ].
The heating resistance wires 302 adopt a multi-stage parallel heating mode, and the heating power of 130-300W can be realized.
The preheating device control module 7 in this embodiment includes an ECU701, a temperature sensor 702, a power module 703 and an electronic control switch 704, the temperature sensor 702 is connected to the ECU701, an input end of the electronic control switch 704 is connected to the power module 703, an output end of the electronic control switch 704 is connected to the heating resistance wire 302, a control end is connected to the ECU701, and the temperature sensor 702 is installed at an output port of the preheating device.
The power module 703 adopts 10-20V, 13-15A DC storage battery, and the electric control switch 704 adopts a relay.
The working process of the preheating high-pressure common rail injection system in the embodiment specifically comprises the following steps:
biodiesel flows out of the oil tank 1, flows through the filter 2 and then enters the preheating device 3, at the moment, the high-pressure oil pump 4 stops working, the biodiesel is heated in the preheating device 3, the ECU701 acquires data information of the temperature sensor 702 when the biodiesel is heated to a temperature threshold value of (70 ℃ and 80 ℃), then the relay 704 is controlled to be turned off, the power module 703 stops supplying power to the heating resistance wire 302, the preheating device 3 stops heating the biodiesel, then the high-pressure automobile ECU controls the high-pressure oil pump 4 to be turned on, the biodiesel is heated to a high temperature of more than 100 ℃ in the high-pressure oil pump 4, and then the biodiesel flows through the common rail pipe 5 and is sprayed by the oil sprayer 6.
In the biodiesel conveying process, the ECU701 monitors the outlet temperature of the preheating device 3 in real time, namely the acquisition signal of the temperature sensor 702, if the outlet temperature is less than 70 ℃, the ECU701 controls the high-pressure oil pump 4 to stop working, then the relay 704 is controlled to be started, the power module 703 starts to supply power to the heating resistance wire 302, and the biodiesel in the preheating device 3 is heated.
It should be noted that the high-pressure oil pump 4 and the oil nozzle 6 in this embodiment also need to be electrically controlled by the vehicle ECU, but the connection relationship between the high-pressure oil pump 4 and the oil nozzle 6 and the vehicle ECU is not the technical core of the present invention, and therefore, the details are not described again.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The biodiesel oil injection preheating high-pressure common rail injection system is characterized by comprising an oil tank (1) filled with biodiesel, a filter (2), a preheating device (3), a high-pressure oil pump (4), a common rail pipe (5), an oil injector (6) and a preheating device control module (7);
the oil tank (1), the filter (2), the preheating device (3), the high-pressure oil pump (4), the common rail pipe (5) and the oil injector (6) are sequentially connected; the preheating device control module (7) is connected with the preheating device (3);
the biodiesel is output from the oil tank (1), passes through the filter (2) and then is input into the pre-heating device (3), the pre-heating device (3) heats the biodiesel to be within a set threshold value, and then the biodiesel is output from the pre-heating device (3) to the high-pressure oil pump (4) to be heated and then flows through the common rail pipe (5) to be sprayed through the oil sprayer (6).
2. The biodiesel oil injection preheating high-pressure common rail injection system as claimed in claim 1, wherein the preheating device (3) comprises an outer shell (301), a heating resistance wire (302) and an oil conveying inner pipe (303); the oil conveying inner pipe (303) penetrates through the outer shell (301), one end of the oil conveying inner pipe is connected with the filter (2), and the other end of the oil conveying inner pipe is connected with the high-pressure oil pump (4); the heating resistance wire (302) is arranged in the outer shell (301) and wound on the oil conveying inner pipe (303).
3. The biodiesel injection preheating high-pressure common rail injection system according to claim 2, wherein the housing (301) is a metal housing.
4. The biodiesel oil injection preheating high-pressure common rail injection system as claimed in claim 2, wherein the oil delivery inner pipe (303) is a stainless steel pipe.
5. The biodiesel oil injection preheating high-pressure common rail injection system according to claim 2, wherein the length of the preheating device (3) along the oil conveying inner pipe (303) ranges from [3cm,5cm ].
6. The biodiesel oil injection preheating high-pressure common rail injection system as claimed in claim 2, wherein the heating resistance wire (302) is heated in a multi-stage parallel manner.
7. The biodiesel injection preheating high-pressure common rail injection system according to claim 2, wherein the preheating device control module (7) comprises an ECU (701), a temperature sensor (702), a power supply module (703) and an electronic control switch (704); the temperature sensor (702) is connected with the ECU (701); the input end of the electric control switch (704) is connected with the power module (703), the output end of the electric control switch is connected with the heating resistance wire (302), and the control end of the electric control switch is connected with the ECU (701); the temperature sensor (702) is arranged at the output port of the preheating device.
8. The biodiesel injection preheating high-pressure common rail injection system according to claim 7, wherein the power module (703) is a battery.
9. The biodiesel injection preheating high-pressure common rail injection system according to claim 7, wherein the electronic control switch (704) is a relay.
10. The biodiesel oil injection preheating high-pressure common rail injection system according to claim 1, wherein the temperature threshold of the biodiesel oil after the biodiesel oil is heated by the preheating device (3) is (70 ℃,80 ℃).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011034806.4A CN112177814A (en) | 2020-09-27 | 2020-09-27 | Biodiesel oil injection preheating high-pressure common rail injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011034806.4A CN112177814A (en) | 2020-09-27 | 2020-09-27 | Biodiesel oil injection preheating high-pressure common rail injection system |
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| Publication Number | Publication Date |
|---|---|
| CN112177814A true CN112177814A (en) | 2021-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011034806.4A Pending CN112177814A (en) | 2020-09-27 | 2020-09-27 | Biodiesel oil injection preheating high-pressure common rail injection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047985A (en) * | 2021-04-20 | 2021-06-29 | 上海交通大学 | Avoid fuel direct contact's fuel heating common rail system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090235896A1 (en) * | 2006-06-27 | 2009-09-24 | Georg Gruber | Diesel Cycle Internal Combustion Engine |
| CN103437929A (en) * | 2013-07-16 | 2013-12-11 | 江苏大学 | Fuel oil system and control method capable of accurately controlling oil injection temperature of diesel engine |
| US20150292430A1 (en) * | 2012-10-15 | 2015-10-15 | Continental Automotive Gmbh | Method for Operating a Fuel Injection System with a Fuel Filter Heating Process and Fuel Injection System |
| CN205714426U (en) * | 2016-05-06 | 2016-11-23 | 昆明理工大学 | A kind of squelch type biodiesel generating set |
| CN107806386A (en) * | 2017-12-05 | 2018-03-16 | 北京理工大学 | A kind of overcritical fuel injection system |
| CN111322185A (en) * | 2018-12-16 | 2020-06-23 | 贵阳学院 | Double-common-rail injection oil supply system of engine |
-
2020
- 2020-09-27 CN CN202011034806.4A patent/CN112177814A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090235896A1 (en) * | 2006-06-27 | 2009-09-24 | Georg Gruber | Diesel Cycle Internal Combustion Engine |
| US20150292430A1 (en) * | 2012-10-15 | 2015-10-15 | Continental Automotive Gmbh | Method for Operating a Fuel Injection System with a Fuel Filter Heating Process and Fuel Injection System |
| CN103437929A (en) * | 2013-07-16 | 2013-12-11 | 江苏大学 | Fuel oil system and control method capable of accurately controlling oil injection temperature of diesel engine |
| CN205714426U (en) * | 2016-05-06 | 2016-11-23 | 昆明理工大学 | A kind of squelch type biodiesel generating set |
| CN107806386A (en) * | 2017-12-05 | 2018-03-16 | 北京理工大学 | A kind of overcritical fuel injection system |
| CN111322185A (en) * | 2018-12-16 | 2020-06-23 | 贵阳学院 | Double-common-rail injection oil supply system of engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113047985A (en) * | 2021-04-20 | 2021-06-29 | 上海交通大学 | Avoid fuel direct contact's fuel heating common rail system |
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Application publication date: 20210105 |