CN113236459A - Device and method for realizing flash-boiling spraying by heating oil rail - Google Patents
Device and method for realizing flash-boiling spraying by heating oil rail Download PDFInfo
- Publication number
- CN113236459A CN113236459A CN202110642697.2A CN202110642697A CN113236459A CN 113236459 A CN113236459 A CN 113236459A CN 202110642697 A CN202110642697 A CN 202110642697A CN 113236459 A CN113236459 A CN 113236459A
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- Prior art keywords
- oil
- oil rail
- rail
- heating
- sensor
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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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/24—Fuel-injection apparatus with sensors
- F02M2200/247—Pressure sensors
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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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/24—Fuel-injection apparatus with sensors
- F02M2200/248—Temperature sensors
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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
-
- 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
Abstract
The invention discloses a device and a method for realizing flash-boiling spraying by using oil rail heating, which relate to the field of engine fuel atomization and are characterized by comprising an oil rail, a heating device, an oil rail sensor and a control module, wherein the oil rail sensor is used for monitoring the temperature and the pressure of fuel in the oil rail in real time, and the control module is used for receiving temperature and pressure data sent by the oil rail sensor and controlling the power of the heating device. The invention utilizes the improvement of the existing oil rail to realize the heating of the fuel from the oil rail layer, and is matched with the temperature and pressure sensor to control the oil temperature in real time according to the working condition, thereby ensuring the proper temperature and the best flash boiling effect, having less influence on the assembly of the whole machine, lower cost, uniform heating of the oil rail, safe and reliable, low failure rate, uniform temperature distribution, no combustion difference of the multi-cylinder machine and easy control.
Description
Technical Field
The invention relates to the field of fuel atomization of engines, in particular to a device and a method for realizing flash-boiling spraying by heating an oil rail.
Background
In the design process of the core combustion system of the engine, fuel atomization is a core technology for realizing clean and efficient combustion, and the key for realizing efficient fuel atomization, so that fuel and air are better mixed into homogeneous gas, is the energy conservation and emission reduction of the combustion system. At present, the main technical means for fuel atomization is high-pressure injection, namely, the pressure of an oil rail is increased, and the fuel is crushed and atomized by utilizing the pressure difference between the fuel and back pressure. Researches show that the fuel temperature is properly increased, the fuel flashing spraying is realized, the fuel atomization and evaporation effects can be obviously improved under the condition of lower fuel injection pressure, and the aims of reducing the tail gas emission of the gasoline engine and improving the fuel economy are fulfilled.
After fuel oil is heated, the combustion effect can be greatly improved in extreme conditions such as cold start and cold environment, energy is saved, and emission is reduced. However, the thermal management measure of heating by using the water jacket can realize the flash spraying under partial extreme conditions, but the backpressure can be changed along with the change of working conditions, the flash boiling range is reduced until the flash boiling is gradually avoided, the whole flash spraying atomization form is restricted by the temperature of cooling water (the maximum temperature is 90-110 ℃), and the applicable operating working condition of the flash spraying is reduced. In addition, the fuel injector is used for heating the fuel, the fuel injector needs to be redesigned, the complexity of the fuel injector is increased, the cost of a fuel system is greatly increased, in addition, the multi-cylinder control cannot be simultaneously carried out, and the fault rate and the control strategy are more complicated.
Therefore, those skilled in the art are dedicated to develop a device and a method for realizing flash boiling spraying by using oil rail heating, so that the fuel can be heated from the oil rail layer by using the improvement of the existing oil rail, and the oil temperature can be controlled in real time according to the working condition by matching with a temperature and pressure sensor, thereby ensuring the proper temperature and the optimal flash boiling effect.
Disclosure of Invention
In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to warm the fuel of the fuel rail and control the temperature.
In order to achieve the purpose, the invention provides a device for realizing flash boiling spraying by using oil rail heating, which comprises an oil rail, a heating device, an oil rail sensor and a control module, wherein the heating device is connected with the oil rail, the oil rail sensor is used for monitoring the temperature and the pressure of fuel oil in the oil rail in real time, the control module is connected with the oil rail sensor and the heating device, and the control module is used for receiving temperature and pressure data sent by the oil rail sensor and controlling the power of the heating device.
Further, the heating device is installed in the oil rail, and a heat insulation layer is further arranged outside the oil rail.
Further, the oil rail is made of heat conducting metal, the heating device is wound outside the oil rail, and a heat insulation layer is further arranged outside the oil rail.
Further, the heating device is an electric heating wire, and the heat insulation layer is made of asbestos and tinfoil.
Furthermore, the oil rail further comprises an oil outlet and an oil inlet, the oil inlet is connected with the oil pump, the oil outlet is connected with the oil injector, an oil outlet heating device is wound outside the oil outlet, and the oil rail sensor is installed at the end of the oil rail and at a position close to the oil outlet.
Further, the engine control system further comprises an engine sensor, wherein the engine sensor is installed in the engine and used for monitoring the cylinder pressure of the engine in real time and transmitting the cylinder pressure to the control module.
A method for achieving flash-boil spraying by means of oil rail heating, the method comprising the steps of:
step 1, installing a heating device and an oil rail sensor at an oil rail and an oil outlet of the oil rail, installing an engine sensor in an engine, connecting the oil rail sensor, the heating device, the oil rail sensor and a control module, and arranging a heat insulation layer outside the oil rail;
and 3, calculating a difference value between the monitored temperature and the target temperature by the control module, controlling the heating device to heat the fuel oil in the oil rail by using different powers, and controlling the temperature of the fuel oil in the oil rail to be at the target temperature.
Further, the heating device is installed inside the oil rail and outside the oil outlet.
Further, the oil rail is made of heat conducting metal, and the heating device is wound outside the oil rail and outside the oil outlet.
Further, the heating device is an electric heating wire, and the heat insulation layer is made of asbestos and tinfoil.
In a preferred embodiment of the invention, the existing oil rail is modified, and a heating device is wrapped or installed on the oil rail of the fuel supply system, so that the oil rail is heated to control the fuel temperature in the oil rail, and the temperature and pressure sensor is matched to control the oil temperature in real time according to the working condition, thereby ensuring proper temperature and optimal flashing spraying effect and achieving the purpose of greatly improving the fuel combustion.
The invention is reformed according to the structure of the existing oil rail, has less influence on the assembly of the whole machine, lower cost, uniform heating of the oil rail, safe and reliable performance, low failure rate, uniform temperature distribution, no combustion difference of multi-cylinder machines and easy control. The oil temperature control and the heat insulation layer design close to the oil outlet can accurately control the heating temperature of each cylinder, the heating efficiency is improved, the heating power is flexibly adjusted according to the running characteristics of the engine, and the flashing spraying in different states can be realized.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a schematic view of an arrangement of external heating wires of an apparatus for flash-boiling spraying using oil rail heating according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of an arrangement of an in-line heating wire of a device for realizing flash-boiling spraying by heating an oil rail according to a preferred embodiment of the present invention;
the system comprises an oil rail 1, an oil rail 2, an oil rail heater strip 3, an oil rail sensor 4, a control module 5, an oil outlet 6, an oil inlet 7, an engine sensor 7, an oil outlet heater strip 8 and a heat insulation layer 9.
Detailed Description
The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.
In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.
As shown in fig. 1, the structure of the existing oil rail is modified, so that the heating function of the oil rail is realized, in the external heating wire type arrangement mode of the oil rail, the oil rail 1 is made of heat-conducting metal, the oil rail heating wire 2 is wound outside the oil rail 1, and the oil rail metal is used for conducting heat to heat fuel oil, so that the oil temperature is improved. An oil outlet heating wire 8 is additionally arranged at a position, close to an oil outlet 5, on the oil rail 1, an oil rail sensor 3 is installed at the end of the oil rail 1 and the position, close to the oil outlet 5, of the oil rail, the oil rail sensor 3 comprises a temperature sensor and a pressure sensor and can monitor the temperature and the pressure of fuel oil, a control module 4 is connected with the oil rail sensor 3 and an engine sensor 7, and the heating power of the oil rail heating wire 2 and the heating power of the oil outlet heating wire 8 are controlled by the control module 4. The outer surface of the oil rail 1 is provided with a heat insulation layer 9, so that the outward heat transfer loss of the oil rail 1 is reduced, the heating efficiency is improved, and the heat insulation layer 9 is made of asbestos and tinfoil. After fuel enters the oil rail 1 through the oil inlet 6, the oil rail sensor 3 can measure the temperature and the pressure of the fuel in the oil rail 1 and at the oil outlet 5 in real time and send the measured temperature and the pressure to the control module 4, meanwhile, the engine sensor 7 measures the cylinder pressure in real time and sends the measured pressure to the control module 4, the control module 4 calculates the difference between the monitored temperature and the target temperature, the oil rail is heated by selecting proper heating power according to the fuel flow, the oil rail heating wire 2 and the oil outlet heating wire 8, therefore, the fuel temperature in the oil rail is controlled to be close to the target temperature and the fuel temperature is adjusted under different cylinder pressures, different superheat degrees are achieved, and flashing spraying in different states is achieved. In the whole working process of the engine, the control module 4 calculates the corresponding superheat degree through parameters such as cylinder pressure, air inlet pressure, throttle opening, air inlet flow, air-fuel ratio and the like collected by the engine sensor 7 so as to realize the regulation and control of the fuel temperature through feedback, and meanwhile, the fuel temperature feedback is subjected to real-time heating control by using control modes such as PID (proportion integration differentiation), duty ratio and the like so as to realize stable fuel temperature control. The oil rail sensor 3 arranged near the oil outlet 5 can accurately measure the temperature of fuel entering an engine cylinder, and is matched with an oil outlet heating wire 8 wound outside the oil outlet 5, so that more accurate and real-time monitoring of the temperature and the pressure of the fuel is realized.
As shown in fig. 2, in the embedded heater strip type arrangement mode of the oil rail, the oil rail heater strip 2 is directly plugged into the oil rail 1 to directly heat the oil, an oil outlet heater strip 8 is additionally arranged at a position, close to an oil outlet 5, on the oil rail 1, an oil rail sensor 3 is also arranged at the end of the oil rail 1 and the position, close to the oil outlet 5, of the oil rail, an engine sensor 7 is arranged at the engine, the temperature and the pressure of the oil and the cylinder pressure of the engine are monitored, and the power of the oil rail heater strip 2 and the oil outlet heater strip 8 is controlled by feeding back to a control module 4, a heat insulation layer 9 is additionally arranged on the outer surface of the oil rail 1, and the heat transfer loss caused by heating of the heater strips is reduced.
The invention can also calculate the superheat degree of the fuel rail through the parameters such as the opening degree of a throttle valve, the air inlet pressure and the like in the running process of the engine so as to realize the regulation and control of the fuel temperature through feedback. The invention is suitable for the fuel supply system of the modern gasoline direct injection engine, but is not limited to the gasoline and direct injection modes, and the method provided by the invention can be adopted by air passage injection and diesel engines.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The utility model provides an utilize oil rail heating to realize device of spraying that flashes, a serial communication port, including oil rail, heating device, oil rail sensor and control module, wherein, heating device with the oil rail links to each other, the oil rail sensor is used for real-time supervision the temperature and the pressure of fuel in the oil rail, control module with the oil rail sensor with heating device links to each other, control module is used for receiving temperature and pressure data and control that the oil rail sensor sent heating device's power.
2. The device for realizing flash-boiling spraying by using the oil rail as claimed in claim 1, wherein the heating device is installed inside the oil rail, and the outside of the oil rail is further provided with a heat insulation layer.
3. The device for realizing flash boiling spraying by using the oil rail for heating as claimed in claim 1, wherein the oil rail is made of heat conducting metal, the heating device is wound on the outer part of the oil rail, and the outer part of the oil rail is further provided with a heat insulation layer.
4. The device for realizing flash-boiling spraying by using the oil rail heating as claimed in claim 2 or 3, wherein the heating device is an electric heating wire, and the material of the heat-insulating layer is asbestos and tinfoil.
5. The device for realizing boiling flash spraying by using the oil rail for heating as claimed in claim 1, wherein the oil rail further comprises an oil outlet and an oil inlet, the oil inlet is connected with an oil pump, the oil outlet is connected with an oil injector, an oil outlet heating device is wound outside the oil outlet, and the oil rail sensors are installed at the end of the oil rail and at a position close to the oil outlet.
6. The apparatus of claim 1, further comprising an engine sensor mounted in the engine, wherein the engine sensor is configured to monitor cylinder pressure of the engine in real time and transmit the monitored cylinder pressure to the control module.
7. A method for achieving flash-boil spraying by means of oil rail heating, the method comprising the steps of:
step 1, installing a heating device and an oil rail sensor at an oil rail and an oil outlet of the oil rail, installing an engine sensor in an engine, connecting the oil rail sensor, the heating device, the oil rail sensor and a control module, and arranging a heat insulation layer outside the oil rail;
step 2, when the engine is started, the oil rail sensor module monitors the temperature and the pressure of fuel oil at the oil rail and an oil rail oil outlet in real time and transmits the temperature and the pressure to the control module, and the engine sensor monitors the cylinder pressure of the engine in real time and transmits the cylinder pressure to the control module;
and 3, calculating a difference value between the monitored temperature and the target temperature by the control module, controlling the heating device to heat the fuel oil in the oil rail by using different powers, and controlling the temperature of the fuel oil in the oil rail to be at the target temperature.
8. A method of effecting a flash spray using fuel rail heating as claimed in claim 7 wherein said heating means is mounted inside said fuel rail and outside said fuel outlet.
9. The method for achieving splash spray through oil rail heating of claim 7, wherein the oil rail is made of heat conducting metal, and the heating device is wound on the outer portion of the oil rail and the outer portion of the oil outlet.
10. The method for realizing flash-boiling spraying by using oil rail heating as claimed in claim 8 or 9, wherein the heating device is an electric heating wire, and the material of the heat-insulating layer is asbestos and tinfoil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110642697.2A CN113236459B (en) | 2021-06-09 | 2021-06-09 | Device and method for realizing flash-boiling spraying by heating oil rail |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110642697.2A CN113236459B (en) | 2021-06-09 | 2021-06-09 | Device and method for realizing flash-boiling spraying by heating oil rail |
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| CN113236459A true CN113236459A (en) | 2021-08-10 |
| CN113236459B CN113236459B (en) | 2022-08-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718786A (en) * | 2022-04-25 | 2022-07-08 | 广西玉柴机器股份有限公司 | Heating device and method for common rail system of diesel engine |
| CN114876688A (en) * | 2022-05-05 | 2022-08-09 | 浙江吉利控股集团有限公司 | Oil rail assembly and preheating method of oil rail body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114876688A (en) * | 2022-05-05 | 2022-08-09 | 浙江吉利控股集团有限公司 | Oil rail assembly and preheating method of oil rail body |
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| CN113236459B (en) | 2022-08-26 |
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