CN108869078A - Aero-engine high-pressure common-rail fuel system - Google Patents
Aero-engine high-pressure common-rail fuel system Download PDFInfo
- Publication number
- CN108869078A CN108869078A CN201810673007.8A CN201810673007A CN108869078A CN 108869078 A CN108869078 A CN 108869078A CN 201810673007 A CN201810673007 A CN 201810673007A CN 108869078 A CN108869078 A CN 108869078A
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- Prior art keywords
- rail
- fuel
- pressure
- oil
- aero
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/023—Means for varying pressure in common rails
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/0275—Arrangement of common rails
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention discloses a kind of aero-engine high-pressure common-rail fuel systems, including fuel metering unit, high-pressure oil pump, fuel rail and are set to the rail pressure control valve on the fuel rail and for controlling fuel rail recirculating oil quantity.Aero-engine high-pressure common-rail fuel system of the invention, by the way that rail pressure control valve is arranged, directly controlling and adjusting to oily rail pressure power is realized by way of controlling fuel rail recirculating oil quantity, improve reliability, safety and the navigability of fuel system, and system response time greatly improved, improve the performance of engine.
Description
Technical field
The invention belongs to aero-engine technology fields, specifically, the present invention relates to a kind of aero-engine high pressures
Common rail fuel combustion system.
Background technique
For engine, fuel system is important composition system, and effect mainly provides one at regular time and quantity
The fuel oil of quality is determined for burning, and fuel combustion converts thermal energy for chemical energy and does work to piston, and piston drives bent by connecting rod
Axis rotation is to external output mechanical energy.
Currently, diesel piston engine fuel system mostly uses high-pressure common rail form, mainly by fuel metering unit, high pressure
Oil pump, oil pipe, high pressure oil rail, fuel injector, fuel pressure transmitter, fuel temperature sensor, the composition such as rail pressure sensor.
Atomizing effect when fuel oil injection can be improved using the fuel system of high-pressure common rail form, to improve burning effect
Rate reduces exhaust emission.The effect of high-pressure common-rail fuel system mesohigh oil pump is to establish fuel oil goal pressure, high pressure oil rail
It functions as pressure accumulater and maintains goal pressure, the effect of fuel injector is injection high pressure fuel and distributive value depends on fuel injector
The unlatching pulsewidth of solenoid valve and current oily rail pressure power.Primary structure is a proportion magnetic valve inside fuel metering unit, is made
With the ratio for being control high-pressure oil pump pressurization oil mass and oil return oil mass.
The fuel oil road of high-pressure common-rail fuel system is divided into fuel feeding and oil return, and fuel feeding is from high-pressure oil pump to high pressure oil rail again to spray
Oily device, oil return mainly include high-pressure oil pump oil return, oil return of oil injector.The main function of high-pressure oil pump oil return is to utilize low pressure oil return
High-pressure oil pump is lubricated and is cooled down, oil return of oil injector also utilizes other than playing the role of lubricating fuel injector and being cooling
The extra fuel oil not sprayed is transmitted back to fuel tank by oil return, and most of oil rail has physical protection valve (to reach capacity on a small quantity without oil return
Pressure release when safe pressure), the oily rail of state-of-the-art technology has the function of that " limp-home " (enters malfunction, system rail pressure is set in
A steady state value that is lower, guaranteeing a small amount of performance of engine).
The high-pressure common-rail fuel system of existing aero-engine does not carry out closed-loop control directly to high pressure oil rail pressure
Component or to have only be more than the mechanical pressure release valve that certain value is opened in oily rail pressure power, oily rail pressure power can only pass through the fuel oil on oil pump
Metering units control, directly can not be controlled and be adjusted to oily rail pressure power.
Because in high pressure co-rail system, the fuel feeding of each fuel injector both is from oily rail.If cannot be carried out to rail pressure quick, quasi-
Really, it reliably adjusts, the work of each cylinder of engine can all be affected.And belong between each cylinder total because of/common mode failure, tradition
The normal work of high pressure co-rail system all rely on control of the fuel metering unit to rail pressure, in certain high reliability demands
Occasion (crash rate is not higher than 10-7) is in application, the reliability of single electronic element is unsatisfactory for requiring.
When because of Aero-Engine Start the target rail pressure of demand compared to rated point it is lower (such as rated point rail pressure 1600bar, rise
300bar is only needed when dynamic), once the control of fuel metering unit is inaccurate, rail pressure can be more than target value (and be far below rail
Upper safety limit is pressed, mechanical pressure release valve cannot work at this time).For the generation for avoiding this phenomenon, when starting, only a small amount of fuel oil passed through
Enter oily rail after high-pressure oil pump compression, oil rail pressure power settling time is long when causing to start.Similarly, when there is excess revolutions in aero-engine
(in general, ECU data has been cured, and fuel injection pulsewidth is determining value under current working, therefore rail pressure overrate causes to surpass
Turn) oily rail pressure power cannot be controlled in time that (fuel oil comes into oily rail, and can not be discharged) is adjusted to engine performance, currently
The mode of oil-break is mostly used, and responds relatively slow (fuel oil into oily rail is only capable of reducing rail pressure by fuel injector consumption).Meanwhile
The normal work of entire fuel system all relies on the matching relationship of fuel metering unit Yu oil pump feed ability, once it fires
Oil measurement element failure (factors such as proportion magnetic valve damages, plug connector virtual connection loosens, electromagnetic interference), or because of the machinery of high-pressure pump
Failure causes Amount of actual oil supply and theoretical fuel delivery deviation (duty ratio of fuel metering unit and target rail pressure and hair at this time occur
Motivation performance arteries and veins spectrogram deviates), the performance of entire engine, which will receive, to be seriously affected.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, the present invention provides a kind of boat
Empty engine high-pressure common-rail fuel system, it is therefore an objective to realize the adjusting to oily rail pressure power, improve engine performance.
To achieve the goals above, the technical scheme adopted by the invention is as follows：Aero-engine high-pressure common-rail fuel system,
Including fuel metering unit, high-pressure oil pump, fuel rail and it is set on the fuel rail and for controlling fuel rail recirculating oil quantity
Rail pressure control valve.
The high-pressure oil pump is connect with the fuel rail by oil pipe, and fuel rail is connect with fuel injector by oil pipe, high pressure
The inlet of oil pump is equipped with fuel pressure transmitter and temperature sensor.
The fuel rail be equipped with rail pressure sensor for detecting rail pressure, rail pressure sensor and the rail pressure control valve with
ECU is electrical connection.
The current rail pressure for the fuel rail that the rail pressure sensor will test is supplied to ECU, and ECU is by current rail pressure and target
Rail pressure is compared；If the current rail pressure of fuel rail is more than target rail pressure, ECU controls the high-pressure oil pump reduction and is pumped into fuel rail
Amount of fuel reduce the rail pressure of fuel rail while by the oil extraction of rail pressure control valve.
The current rail pressure for the fuel rail that the rail pressure sensor will test is supplied to ECU, and ECU is by current rail pressure and target
Rail pressure is compared；If the current rail pressure of fuel rail is lower than target rail pressure, ECU controls the high-pressure oil pump increase and is pumped into fuel rail
Amount of fuel, improve the rail pressure of fuel rail.
In Aero-Engine Start, the fuel metering unit is shown in a fully open operation.
The fuel metering unit is proportion magnetic valve.
Aero-engine high-pressure common-rail fuel system of the invention, by the way that rail pressure control valve is arranged, to control fuel rail
The mode of recirculating oil quantity realize directly controlling and adjusting to oily rail pressure power, rail pressure can be directly controlled, improve fuel oil
Reliability, safety and the navigability of system, and system response time is largely improved, engine can be improved
Performance.
Detailed description of the invention
This specification includes the following drawings, and shown content is respectively：
Fig. 1 is the schematic illustration of aero-engine high-pressure common-rail fuel system of the present invention；
Fig. 2 is the structural schematic diagram of aero-engine high-pressure common-rail fuel system of the present invention；
In figure label for：
1, oil transfer pump；2, fuel pressure transmitter；3, temperature sensor；4, fuel metering unit；5, high-pressure oil pump；6, it fires
Oily rail；7, fuel injector；8,ECU；9, rail pressure sensor；10, rail pressure control valve.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Explanation, it is therefore an objective to those skilled in the art be helped to have more complete, accurate and deep reason to design of the invention, technical solution
Solution, and facilitate its implementation.
As depicted in figs. 1 and 2, the present invention provides a kind of aero-engine high-pressure common-rail fuel system, including fuel tank,
It oil transfer pump, secondary fuel oil filter, fuel injector, fuel metering unit, high-pressure oil pump, fuel rail and is set on fuel rail and for controlling
The rail pressure control valve of the recirculating oil quantity of fuel rail processed.
Specifically, as depicted in figs. 1 and 2, fuel injector setting is multiple, fuel injector is used to spray into fuel oil in combustion chamber,
High-pressure oil pump is connect with fuel rail by oil pipe, and fuel rail is connect with fuel injector by oil pipe, and fuel rail is for guiding fuel oil
To in each fuel injector.Oil transfer pump is set in fuel tank, and fuel tank passes through oil pipe and secondary fuel oil filter for storing fuel oil, oil transfer pump
Connection, secondary fuel oil filter are connect by oil pipe with high-pressure oil pump.
As depicted in figs. 1 and 2, the inlet of high-pressure oil pump is equipped with fuel pressure transmitter and temperature sensor, fuel oil pressure
Force snesor is used to detect the oil pressure of the inlet of high-pressure oil pump, and temperature sensor is used to detect the oil of the inlet of high-pressure oil pump
Temperature, fuel pressure transmitter and temperature sensor are to be electrically connected with ECU (ECU is engine electronic control unit).Oil transfer pump is logical
The oil inlet for crossing oil pipe and secondary fuel oil filter connects, and the oil outlet of secondary fuel oil filter is connected by the entrance of oil pipe and high-pressure oil pump
It connects, the oil return opening of high-pressure oil pump is connect by oil pipe with fuel tank, and the oil outlet of high-pressure oil pump is connect by oil pipe with fuel rail.Combustion
Oil measurement unit is for measuring amount of fuel, and high-pressure oil pump is for pressurizeing to fuel oil, and fuel metering unit is integrated in height
On pressure oil pump, the fuel oil in fuel tank is transported to after secondary fuel oil filter filters by oil pipe under the pumping effect of oil transfer pump
The entrance of high-pressure oil pump, then fuel oil flows through the oil outlet that fuel metering unit reaches high-pressure oil pump, the oil outlet of high-pressure oil pump
The fuel oil at place is transported in fuel rail by oil pipe, and last fuel oil is assigned to fuel injector from fuel rail and is injected into cylinder
In.
Fuel metering unit is to be electrically connected with ECU, and control of the fuel metering unit by ECU, ECU controls fuel metering list
Member adjusts the opening size of oil outlet.Preferably, fuel metering unit is proportion magnetic valve, and to power off ratio open in usual
Solenoid valve.
As depicted in figs. 1 and 2, fuel rail is equipped with the rail pressure sensor for detecting rail pressure, rail pressure sensor and rail pressure
Control valve is to be electrically connected with ECU, control of the rail pressure control valve by ECU.Target track is arranged according to engine performance needs in ECU
The injection pulse width of pressure and fuel injector guarantees distributive value.Rail pressure control valve is set at the oil return opening of fuel rail, rail pressure control valve
Oil inlet is connected to the oil return opening of fuel rail, and the oil outlet of rail pressure control valve is connect by oil pipe with fuel tank, and rail pressure sensor is set
It is placed at the oil return opening of fuel rail.It preferably, rail pressure control valve is proportion magnetic valve, and is power-off normally closed type ratio electromagnetism
Valve.
In aero-engine operation, the current rail pressure for the fuel rail that rail pressure sensor will test is supplied to ECU, ECU
Current rail pressure is compared with target track pressure, fuel metering unit of the ECU on high-pressure oil pump sends instruction.If fuel rail
Current rail pressure is more than target rail pressure, and ECU control high-pressure oil pump reduces the amount of fuel for being pumped into fuel rail, while passing through rail pressure control valve
Oil extraction enables the rail pressure of fuel rail to be rapidly reached target rail pressure to reduce rapidly the rail pressure of fuel rail；If fuel rail is current
Rail pressure is lower than target rail pressure, and ECU control high-pressure oil pump increase is pumped into the amount of fuel of fuel rail, improves the rail pressure of fuel rail.
When above-mentioned two situations cannot be completed to adjust (according to the demand of engine) within the set time, then high-pressure common rail fires
Oil system enters malfunction, the power-off of fuel metering unit, and fuel metering unit is shown in a fully open operation, and only passes through rail pressure control at this time
The rail pressure of fuel rail is adjusted in valve processed.When the temperature of the inlet for the high-pressure oil pump that temperature sensor is read is lower than setting value
When (according to the demand of engine), there are the temperature difference between the Current Temperatures and setting value of the inlet of high-pressure oil pump, then increase height
The pump oil amount of pressure oil pump is acted on improving high-pressure oil pump to the heating of fuel oil, has heating fuel oil, at this time rail pressure control valve
Will fuel rail rail pressure control in target rail pressure, the extra fuel feeding of high-pressure oil pump is discharged.
Preferably, fuel oil temperature is lower in Aero-Engine Start, fuel metering unit is shown in a fully open operation,
High-pressure oil pump can improve the starting performance of aero-engine with maximum capacity fuel feeding.
Aero-engine high-pressure common-rail fuel system of the invention, the recirculating oil quantity that rail pressure control valve passes through control fuel rail
It realizes adjusting to oily rail pressure power, enables system fuel metering unit standard-sized sheet and the maximum capacity with high-pressure oil pump at the start
Target oil pressure is established rapidly, improves the starting performance of aero-engine；When aero-engine excess revolutions, fuel rail is let out
Pressure improves rapidly engine performance in the case where not oil-break, shortens the response time, improves engine reliability, in certain journey
The excess revolutions of engine is prevented on degree；When fuel metering unit and high-pressure oil pump break down or fail, pass through rail pressure control
Valve the rail pressure of fuel rail is adjusted (can be powered off by control strategy at this time, make the fuel metering unit standard-sized sheet on oil pump,
Oil pump is with maximum capacity fuel feeding) so that the rail pressure of fuel rail and the injection pressure of fuel injector maintain target value, rail pressure control valve
Being mutually backups with fuel metering unit, (Redundancy Design, the possibility that two components fail simultaneously are not higher than 10-9), improve Fuel System
The safety of system；When the fuel oil temperature that fuel tank is transported to high-pressure oil pump is too low, fuel metering unit standard-sized sheet, high-pressure oil pump is with most
(foundation of high-pressure oil pump oil pressure, with the generation of heat, high-pressure oil pump carries out fuel oil with maximum power big ability fuel feeding at this time
Heating), rail pressure control valve is adjusted rail pressure by fuel metering cell failure state at this time, guarantees engine performance, prevents
Liquid level of fuel oil in fuel tank solidification or because of poor fluidity caused by low temperature.
The present invention is exemplarily described in conjunction with attached drawing above.Obviously, present invention specific implementation is not by above-mentioned side
The limitation of formula.As long as using the improvement for the various unsubstantialities that the inventive concept and technical scheme of the present invention carry out；Or not
It is improved, above-mentioned conception and technical scheme of the invention are directly applied into other occasions, in protection scope of the present invention
Within.
Claims (7)
1. aero-engine high-pressure common-rail fuel system, including fuel metering unit, high-pressure oil pump and fuel rail, feature exist
In：It further include the rail pressure control valve for being set on the fuel rail and being used to control fuel rail recirculating oil quantity.
2. aero-engine high-pressure common-rail fuel system according to claim 1, it is characterised in that：The high-pressure oil pump
It is connect with the fuel rail by oil pipe, fuel rail is connect with fuel injector by oil pipe, and the inlet of high-pressure oil pump is equipped with fuel oil
Pressure sensor and temperature sensor.
3. aero-engine high-pressure common-rail fuel system according to claim 1 or 2, it is characterised in that：The fuel oil
It is to be electrically connected that rail, which is equipped with the rail pressure sensor for detecting rail pressure, rail pressure sensor and the rail pressure control valve with ECU,.
4. aero-engine high-pressure common-rail fuel system according to claim 3, it is characterised in that：The rail pressure sensing
The current rail pressure for the fuel rail that device will test is supplied to ECU, and current rail pressure is compared ECU with target track pressure；If fuel oil
The current rail pressure of rail is more than target rail pressure, and ECU controls the high-pressure oil pump and reduces the amount of fuel for being pumped into fuel rail, while passing through rail
Pressure control valve oil extraction reduces the rail pressure of fuel rail.
5. aero-engine high-pressure common-rail fuel system according to claim 3, it is characterised in that：The rail pressure sensing
The current rail pressure for the fuel rail that device will test is supplied to ECU, and current rail pressure is compared ECU with target track pressure；If fuel oil
The current rail pressure of rail is lower than target rail pressure, and ECU controls the amount of fuel that the high-pressure oil pump increase is pumped into fuel rail, improves fuel rail
Rail pressure.
6. aero-engine high-pressure common-rail fuel system according to any one of claims 1 to 5, it is characterised in that：It is navigating
When empty engine start, the fuel metering unit is shown in a fully open operation.
7. aero-engine high-pressure common-rail fuel system according to any one of claims 1 to 6, it is characterised in that：It is described
Fuel metering unit is proportion magnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810673007.8A CN108869078A (en) | 2018-06-26 | 2018-06-26 | Aero-engine high-pressure common-rail fuel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810673007.8A CN108869078A (en) | 2018-06-26 | 2018-06-26 | Aero-engine high-pressure common-rail fuel system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108869078A true CN108869078A (en) | 2018-11-23 |
Family
ID=64295987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810673007.8A Pending CN108869078A (en) | 2018-06-26 | 2018-06-26 | Aero-engine high-pressure common-rail fuel system |
Country Status (1)
| Country | Link |
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| CN (1) | CN108869078A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242461A (en) * | 2019-07-11 | 2019-09-17 | 无锡格迪斯机械制造有限公司 | A kind of high-pressure common-rail oil supplier |
| CN111878245A (en) * | 2020-06-22 | 2020-11-03 | 潍柴动力股份有限公司 | Control device and control method of fuel system |
| CN112729850A (en) * | 2020-11-16 | 2021-04-30 | 苏州好易修信息科技有限公司 | High-pressure common rail intelligent test tool |
| CN114017222A (en) * | 2021-10-14 | 2022-02-08 | 思达耐精密机电（常熟）有限公司 | Diesel engine high-pressure common rail self-adaptive oil supply system and rail pressure control method |
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| EP1319821A2 (en) * | 2001-12-11 | 2003-06-18 | Denso Corporation | Fuel injection system having fuel recirculating structure |
| CN101910612A (en) * | 2007-12-28 | 2010-12-08 | 博世株式会社 | Fuel supply device for internal combustion engine and control device for fuel supply device |
| CN107100744A (en) * | 2017-05-31 | 2017-08-29 | 大连理工大学 | A kind of aero-engine fuel metering system improvement strategy and its controller design method |
| CN108019301A (en) * | 2016-11-01 | 2018-05-11 | 通用汽车环球科技运作有限责任公司 | diesel oil low pressure/high pressure flow control system |
-
2018
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1319821A2 (en) * | 2001-12-11 | 2003-06-18 | Denso Corporation | Fuel injection system having fuel recirculating structure |
| CN101910612A (en) * | 2007-12-28 | 2010-12-08 | 博世株式会社 | Fuel supply device for internal combustion engine and control device for fuel supply device |
| CN108019301A (en) * | 2016-11-01 | 2018-05-11 | 通用汽车环球科技运作有限责任公司 | diesel oil low pressure/high pressure flow control system |
| CN107100744A (en) * | 2017-05-31 | 2017-08-29 | 大连理工大学 | A kind of aero-engine fuel metering system improvement strategy and its controller design method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242461A (en) * | 2019-07-11 | 2019-09-17 | 无锡格迪斯机械制造有限公司 | A kind of high-pressure common-rail oil supplier |
| CN110242461B (en) * | 2019-07-11 | 2024-01-23 | 无锡格迪斯机械制造有限公司 | High-pressure common rail oil supply device |
| CN111878245A (en) * | 2020-06-22 | 2020-11-03 | 潍柴动力股份有限公司 | Control device and control method of fuel system |
| CN112729850A (en) * | 2020-11-16 | 2021-04-30 | 苏州好易修信息科技有限公司 | High-pressure common rail intelligent test tool |
| CN112729850B (en) * | 2020-11-16 | 2023-01-13 | 苏州好易修信息科技有限公司 | High-pressure common rail intelligent test tool |
| CN114017222A (en) * | 2021-10-14 | 2022-02-08 | 思达耐精密机电（常熟）有限公司 | Diesel engine high-pressure common rail self-adaptive oil supply system and rail pressure control method |
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Application publication date: 20181123 |
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