CN111927668A - High-pressure fuel oil common rail system and application thereof in plateau environment simulation - Google Patents
High-pressure fuel oil common rail system and application thereof in plateau environment simulation Download PDFInfo
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- CN111927668A CN111927668A CN202010937629.4A CN202010937629A CN111927668A CN 111927668 A CN111927668 A CN 111927668A CN 202010937629 A CN202010937629 A CN 202010937629A CN 111927668 A CN111927668 A CN 111927668A
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- Prior art keywords
- oil tank
- vacuum
- valve
- tank
- common rail
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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
- 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
- F02M55/025—Common rails
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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
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
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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
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/003—Measuring variation of fuel pressure in high pressure line
Abstract
A high-pressure fuel oil common rail system and application thereof in simulating plateau environment, wherein an air pressure adjusting system is connected with a closed oil tank system through a vacuum degree stabilizing system; the PC control module is connected with the three systems; the air pressure regulating system is characterized in that a vacuum generator is connected with an electric control pressure regulating valve, an oil mist filter and a silencer respectively, and the oil mist filter is connected with a vacuum tank of a vacuum degree stabilizing system; the vacuum degree stabilizing system consists of a throttle valve and a vacuum tank drain valve, the throttle valve and the drain valve are connected to the vacuum tank, and the vacuum tank is connected with a closed oil tank of the closed oil tank system; the closed oil tank system consists of a closed oil tank and an auxiliary oil tank, and the closed oil tank is provided with an oil tank cover, an electronic vacuum gauge, a floater liquid level meter and a liquid discharge valve; the closed oil tank and the auxiliary oil tank are connected through a liquid supplementing valve; a drain valve and a liquid supplementing valve are arranged on the auxiliary oil tank; and the PC control module is respectively connected with the electric control pressure regulating valve, the floater liquid level meter, the electronic vacuum gauge and the oil supplementing valve.
Description
Technical Field
The invention relates to the technical field of high-pressure common-rail fuel systems of diesel engines. In particular to the field of development and verification of a high-pressure common rail fuel system under a simulated plateau environment.
Background
In the face of increasingly stringent emission regulations and severe energy problems, the use of high pressure common rail fuel injection systems on diesel engines has become one of the major trends in diesel engine technology in the world today. Three-high tests (high temperature, plateau, high cold) are usually required in the process of the high-pressure common rail fuel injection system.
At present, for plateau tests, related hydraulic tests are usually carried out in high-altitude areas along with the whole vehicle, so that time and labor are wasted, and dangerousness exists.
Disclosure of Invention
The purpose of the invention is as follows: and simulating the air pressure environment of 0-5000 m plateau areas in plain areas to perform various performance tests of the high-pressure common rail system.
The technical scheme is as follows: a high-pressure fuel oil common rail system is characterized in that an air pressure adjusting system is connected with a closed oil tank system through a vacuum degree stabilizing system; the PC control module is connected with the three systems;
the air pressure regulating system is characterized in that a vacuum generator is connected with an electric control pressure regulating valve, an oil mist filter and a silencer respectively, and the oil mist filter is connected with a vacuum tank of a vacuum degree stabilizing system;
the vacuum degree stabilizing system consists of a throttle valve and a vacuum tank drain valve, the throttle valve and the drain valve are connected to the vacuum tank, and the vacuum tank is connected with a closed oil tank of the closed oil tank system;
the closed oil tank system consists of a closed oil tank and an auxiliary oil tank, and the closed oil tank is provided with an oil tank cover, an electronic vacuum gauge, a floater liquid level meter and a liquid discharge valve; the closed oil tank and the auxiliary oil tank are connected through a liquid supplementing valve; a drain valve and a liquid supplementing valve are arranged on the auxiliary oil tank;
and the PC control module is respectively connected with the electric control pressure regulating valve, the floater liquid level meter, the electronic vacuum gauge and the oil supplementing valve.
Further, it is characterized in that the tank cap is a seal.
The system of the system is applied to simulating the plateau environment.
Has the advantages that: a simulated plateau environment oil tank system is added in the high-pressure common rail rack, so that oil inlet of the high-pressure common rail system is realized, and the pressure value of an oil outlet is stabilized at a set pressure (vacuum degree). The problem of high-pressure common rail system in the plateau experiment is quickly and accurately exposed and simulated, and a basis is provided for the performance and emission research of diesel engines in plateau areas.
Description of the drawings:
FIG. 1 is a schematic diagram of the high pressure common rail gantry integrity test system of the present invention.
FIG. 2 is a schematic diagram of a plateau environment pressure simulation regulation system arranged in a high-pressure common rail rack.
FIG. 3 is a schematic diagram of a vacuum stabilization system in a high pressure common rail skid according to the present invention.
Fig. 4 is a schematic diagram of a closed oil tank system in the high-pressure common rail rack.
FIG. 5 is a schematic diagram of a PC control module in the high pressure common rail gantry of the present invention.
Reference numbers in the figures: 1. sealing the oil tank; 2. a fuel tank cap; 3. a float level gauge; 4. an electronic vacuum gauge; 5. a vacuum tank; 6. a throttle valve; 7. a drain valve; 8. a fluid replenishing valve; 9. a secondary fuel tank; 10. an oil mist filter; 11. an electrically controlled pressure regulating valve; 12. a vacuum generator; 13. a muffler; 14. a PC control module; 15. coarse filtration; 16. a high pressure common rail pump; 17. fine filtering; 18. an ECU; 19. a rail pressure sensor; 20. a common rail pipe; 21. and a fuel injector.
The specific implementation mode is as follows:
before the system works, oil is filled into the main oil tank 1 and the auxiliary oil tank 9, and the liquid level is ensured to be 2/3 of the full liquid level. The system is powered on and the PC control module 14 is turned on. And setting a target vacuum degree, and automatically adjusting the control voltage of the electric control pressure regulating valve 11 by the PC control module 14 to enable the interior of the main oil tank 1 to reach the set target vacuum degree. If the vacuum degree does not reach the target value, the opening degree of the throttle valve 6 needs to be manually reduced. And after the vacuum degree of the main oil tank 1 is stable, starting the system and starting the test. The plateau actual working condition of the diesel engine can be simulated on the bench by the main oil tank 1, the rough filter 15, the high-pressure common rail pump 16, the fine filter 17, the ECU18, the rail pressure sensor 19, the common rail pipe 20 and the injector 21. . The working principle is as follows: diesel oil in the main oil tank 1 sequentially passes through a rough filter 15, a high-pressure common rail pump 16, a fine filter 17 and the high-pressure common rail pump 16, enters a common rail pipe 20, and is atomized and sprayed out through an oil injector 21. The rail pressure sensor 19 may monitor the pressure within the common rail 20 and convert the pressure signal to an electrical signal that is transmitted to the ECU 18. The ECU18 calculates the control current of the high-pressure common rail pump 16 through the obtained rail pressure sensor 19 value, the power-on current of the injector 21 and other signals of the diesel engine, and then controls the output of the high-pressure common rail pump 16 to stabilize the internal pressure of the common rail pipe 20. The surplus diesel oil flows back to the main oil tank 1 through the high-pressure common rail pump 16 and the oil drainage circuit of the oil injector 21.
In the test process, if the liquid level of the main oil tank is reduced to the lower limit value, the PC control module 14 automatically opens the liquid supplementing valve 8 to supplement oil liquid for the main oil tank; when the liquid level of the main oil tank rises to an upper limit value, the PC control module 14 automatically closes the liquid supplementing valve 8. When the liquid level of the auxiliary oil tank is too low, oil needs to be supplemented manually.
The system is shown in fig. 1. The concrete components and the connection mode are as follows:
a simulated plateau ambient pressure regulation system 001 is provided in the high pressure common rail skid, as shown in fig. 2. The function of the system is to provide controllable vacuum degree for the main oil tank, and the subsystems comprise an oil mist filter 10, a vacuum generator 12, an electrically controlled pressure regulating valve 11 and a silencer 13. The subsystem needs to provide 7bar compressed air, the interface A generates vacuum, and the vacuum degree of the interface A depends on the current of the electric control pressure regulating valve and the air quantity passing through the interface A.
A vacuum stabilizing system 002 is provided in the high pressure common rail skid as shown in fig. 3. The function is to stabilize the vacuum value of the main oil tank. The subsystem comprises a throttle valve 6, a vacuum tank 5 and a drain valve 7. Interface B inserts plateau environmental pressure governing system 001A mouth, and interface C inserts main tank gas port D.
A closed tank system 003 is provided in the high-pressure common rail stage. As shown in fig. 4, its function is to provide vacuum for the oil intake and oil return. The subsystem comprises a closed oil tank 1, an oil tank cover 2 (which can be sealed), a float liquid level meter 3, an electronic vacuum meter 4, a main oil tank drain valve 7, an auxiliary oil tank 9, an auxiliary oil tank drain valve 7 and an auxiliary oil tank liquid supplementing valve 8. The interface D is connected to a C port of a vacuum pressure tank (002).
A PC control module 004 is provided in the high pressure common rail gantry. As shown in figure 5, the functions of the device are 1, regulating the current of the electric control pressure regulating valve, 2, collecting the level value of the main oil tank, 3, collecting the vacuum degree of the main oil tank and 4, controlling the switch of the auxiliary oil tank liquid supplementing valve. The liquid level of the main oil tank is stabilized, and the vacuum degree of the main oil tank is adjusted. The interfaces are respectively connected with an electric control pressure regulating valve 11, a main oil tank liquid level meter 3, a main oil tank vacuum gauge 4 and an auxiliary oil tank oil supplementing valve 8.
Claims (3)
1. A high-pressure fuel oil common rail system is characterized in that an air pressure adjusting system is connected with a closed oil tank system through a vacuum degree stabilizing system; the PC control module is connected with the three systems;
the air pressure regulating system is characterized in that a vacuum generator (12) is connected with an electric control pressure regulating valve (11), an oil mist filter (10) and a silencer (13) respectively, and the oil mist filter (10) is connected with a vacuum tank (5) of a vacuum degree stabilizing system;
the vacuum degree stabilizing system consists of a throttle valve (6) and a drain valve (7) of a vacuum tank (5), the throttle valve (6) and the drain valve (7) are connected to the vacuum tank (5), and the vacuum tank (5) is connected with a sealed oil tank (1) of the sealed oil tank system;
the closed oil tank system consists of a closed oil tank (1) and an auxiliary oil tank (9), wherein the closed oil tank (1) is provided with an oil tank cover (2), an electronic vacuum gauge (4), a floater liquid level meter (3) and a liquid discharge valve (7); the closed oil tank (1) is connected with the auxiliary oil tank (9) through a liquid replenishing valve (8); a drain valve (7) and a liquid supplementing valve (8) are arranged on the auxiliary oil tank (9);
the PC control module is respectively connected with an electric control pressure regulating valve (11), a floater liquid level meter (3), an electronic vacuum meter (4) and a liquid supplementing valve (8).
2. A high pressure fuel common rail system according to claim 1, characterized in that the tank cap (2) is a seal.
3. A high pressure fuel common rail system application of claims 1 and 2, in a simulated plateau environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010937629.4A CN111927668A (en) | 2020-09-07 | 2020-09-07 | High-pressure fuel oil common rail system and application thereof in plateau environment simulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010937629.4A CN111927668A (en) | 2020-09-07 | 2020-09-07 | High-pressure fuel oil common rail system and application thereof in plateau environment simulation |
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| Publication Number | Publication Date |
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| CN111927668A true CN111927668A (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010937629.4A Pending CN111927668A (en) | 2020-09-07 | 2020-09-07 | High-pressure fuel oil common rail system and application thereof in plateau environment simulation |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201488877U (en) * | 2009-09-04 | 2010-05-26 | 博世汽车柴油系统股份有限公司 | Altitude simulator |
| CN104863768A (en) * | 2015-04-09 | 2015-08-26 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Device and method for fuel oil temperature control |
| US20150275925A1 (en) * | 2009-03-10 | 2015-10-01 | Deere & Company | Hydraulic circuit supply system |
| CN205003470U (en) * | 2015-09-18 | 2016-01-27 | 中航商用航空发动机有限责任公司 | Analogue means and half physical test ware are supplied with to fuel |
| CN205086674U (en) * | 2015-09-11 | 2016-03-16 | 广西柳工机械股份有限公司 | Engineering machinery fuel tank |
| CN106837896A (en) * | 2017-04-07 | 2017-06-13 | 北京机械设备研究所 | A kind of hydraulic oil container of simulated high altitude hypobaric |
| CN212296681U (en) * | 2020-09-07 | 2021-01-05 | 思达耐精密机电（常熟）有限公司 | High-pressure fuel oil common rail system |
-
2020
- 2020-09-07 CN CN202010937629.4A patent/CN111927668A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150275925A1 (en) * | 2009-03-10 | 2015-10-01 | Deere & Company | Hydraulic circuit supply system |
| CN201488877U (en) * | 2009-09-04 | 2010-05-26 | 博世汽车柴油系统股份有限公司 | Altitude simulator |
| CN104863768A (en) * | 2015-04-09 | 2015-08-26 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Device and method for fuel oil temperature control |
| CN205086674U (en) * | 2015-09-11 | 2016-03-16 | 广西柳工机械股份有限公司 | Engineering machinery fuel tank |
| CN205003470U (en) * | 2015-09-18 | 2016-01-27 | 中航商用航空发动机有限责任公司 | Analogue means and half physical test ware are supplied with to fuel |
| CN106837896A (en) * | 2017-04-07 | 2017-06-13 | 北京机械设备研究所 | A kind of hydraulic oil container of simulated high altitude hypobaric |
| CN212296681U (en) * | 2020-09-07 | 2021-01-05 | 思达耐精密机电（常熟）有限公司 | High-pressure fuel oil common rail system |
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