CN105863907A - Fuel pressure-changing electric injection system and engine with same - Google Patents
Fuel pressure-changing electric injection system and engine with same Download PDFInfo
- Publication number
- CN105863907A CN105863907A CN201610206094.7A CN201610206094A CN105863907A CN 105863907 A CN105863907 A CN 105863907A CN 201610206094 A CN201610206094 A CN 201610206094A CN 105863907 A CN105863907 A CN 105863907A
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- China
- Prior art keywords
- fuel
- pressure
- oil
- injection system
- electric injection
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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
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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
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
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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
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
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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
- 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
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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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
- 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
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a fuel pressure-changing electric injection system and an engine with the same. The fuel pressure-changing electric injection system comprises a fuel injector, a fuel pressure adjusting assembly and a monitoring unit. The monitoring unit is used for monitoring the operation state of the engine and controlling the fuel injector to inject fuel and controlling the fuel pressure adjusting assembly to adjust the fuel supply pressure of the fuel injector according to a monitoring signal. The fuel pressure adjusting assembly is controlled through the monitoring unit according to the monitoring signal, so that the effect that the fuel injector can meet the demand of small fuel amount of a gasoline engine and meet the requirement of fuel-injection amount accuracy under low flow which low fuel pressure corresponds to is guaranteed; under the large-load high-rotation-speed working condition, the fuel inlet pressure of the fuel injector is increased, so that the injection flow meets the requirement of the gasoline engine for large fuel demand amount, and the engine operates normally and efficiently; the effect that the electric injection system can excellently meet the requirement of the engine for the fuel amount under different working conditions is guaranteed, and control over the flow of the fuel injector is accurate; and the structure is simple, and the cost is low.
Description
Technical field
The present invention relates to a kind of BBG field, be specifically related to a kind of become fuel pressure electric injection system and
Electromotor.
Background technology
Electric control fuel oil jet system is the most extensively applied, and this system utilizes the table that various sensor detects
Levy the parameter signal of engine operation condition, by ECU (be called for short ECU) through calculating, analyzing, right
Ratio, needs to control distributive value according to the various operating modes of electromotor, it is ensured that electromotor have good dynamic property,
Economy and emission performance；And typically use single constant fuel pressure at existing intake port injection electric injection system
The fuel injection amount of guarantee fuel injector is the linearity curve being directly proportional to injecting time, high at the big load of electromotor
When there is distributive value Datong District of demand during speed conditions can the short situation of injecting time, at this moment require oil spout
Utensil has sufficiently large injection flow.Fuel injector has a characteristic of minimum controlled fuel injection pulsewidth simultaneously, therefore requirement
When electromotor minimum load and minimum speed, required fuel oil injection pulse width is as far as possible greatly to ensure more than spray
The controlled fuel injection pulsewidth of minimum of oil device, this requires that essence is that requirement fuel injector injection flow is sufficiently small, therefore by
In two kinds of limiting conditions of gasoline engine, different requirement of fuel injector flow is caused there will be the fuel injector of constant flow rate
It is difficult to meet some extreme parameters gasoline engine demands to amount of fuel, such as single cylinder huge discharge rev-happy engine.
Summary of the invention
In view of this, it is an object of the invention to overcome defect of the prior art, it is provided that become fuel pressure EFI
System and electromotor thereof, it is possible to accurately control fuel injector flow, meet Different Work Condition of Engine to combustion
The demand of oil mass, and simple in construction, with low cost.
The change fuel pressure electric injection system of the present invention, including fuel injector, oil pressure adjusting part and monitoring unit,
Described control unit is used for monitoring engine operating state and controlling fuel injector oil spout and control according to monitoring signal
The charge oil pressure of fuel injector is adjusted by oil pressure adjusting part；Described engine operating state is primarily referred to as greatly
Speed conditions at the bottom of load height speed conditions and Smaller load；By the setting of oil pressure adjusting part, change fuel injector
Charge oil pressure and ensure that fuel injector disclosure satisfy that demand and the oil spout of the less amount of fuel of gasoline engine under low discharge
Accuracy of measurement, and by strengthening the input pressure of fuel injector so that injection flow is full under big load height speed conditions
The foot big requirement of gasoline engine fuel demand, it is ensured that electromotor is normally, run efficiently.
Further, described fuel injector is connected with fuel tank by fuel pump, and described oil pressure adjusting part is arranged at spray
The charge oil pressure that can be switched by control is formed not between oil device and fuel pump and between fuel injector and fuel pump
At least two same oil feeding lines；Described two oil feeding lines include suitable low pressure oil supply oil circuit and high-pressure oil feed oil
Road, realizes ejector charge oil pressure by the switching of two oil circuits and regulates, and simple in construction regulates timely and smart
Really.
Further, described oil pressure adjusting part includes the reversal valve for switching oil feeding line and at least two combustion
Oil pressure actuator, described oil feeding line is by by arranging corresponding fuel pressure regulator shape on oil supply pipe
Becoming, monitoring unit controls reversal valve and realizes the switching of oil feeding line；Directly produced by fuel pressure regulator
Difference goes out the oil feeding line of oil pressure, and the fuel oil that same fuel pump exports can be divided into two confessions of different pressures
Oil oil circuit, simple in construction, with low cost.
Further, described reversal valve is four way solenoid valve, and described four way solenoid valve includes valve body and electromagnetic valve core
Assembly, described valve body arranges oil-in, oil-out and two pressure regulation access ports, the described pressure regulation being interconnected
Access port is respectively arranged with fuel pressure regulator for adjusting hydraulic fluid port pressure, and electromagnetic valve core assembly is in monitoring
It is used under the control of unit closing one of them pressure regulation access port and opening another pressure regulation access port；Ensure to supply
Oil-piping simple in construction, oil pressure adjusting part compact conformation, easy for installation, and oil feeding line switching is in time.
Further, said two pressure regulation access port is symmetrical arranged, the electromagnetic valve core of electromagnetic valve core assembly by with
Single-degree-of-freedom reciprocating manner is arranged between two pressure regulation access ports；Improve cutting of oil feeding line further
Throw-over degree and precision, it is ensured that the accuracy of spray of fuel injector.
Further, described electromagnetic valve core is clava and consolidates to be placed on one along self axial sliding movement mode
Surely be arranged at valve inner excitation set in, described electromagnetic valve core is provided with for electromagnetic valve core reset pre-
Clamp force；Stability Analysis of Structures, excitation set also has guide effect, it is ensured that the good stability of electromagnetic valve core motion.
Further, electromagnetic valve core two ends are arc and can partly stretch into realization sealing in pressure regulation access port respectively；
Seal stable and tight.
Further, the helical spring of a described pretightning force of offer, described spiral it are arranged with outside described electromagnetic valve core
Spring is fixed on electromagnetic valve core by one end, and the other end is fixed on the inwall of valve body；Helical spring is conducive to electricity
The stability of magnet valve core axially-movable, it is ensured that four-way electromagnetic Vavle switching is smooth and easy.
Further, described fuel pressure regulator is pressure regulator valve, and the pressure modulating opening of pressure regulator valve accesses with corresponding pressure regulation
Mouth connection, the refluxing opening of pressure regulator valve is connected with fuel tank by an oil return pipe；Ensure the pressure in different oil feeding line
Power is stable, improves the stability of oil spout fuel injector.
The invention also discloses a kind of electromotor, described electromotor is provided with above-mentioned change fuel pressure electric injection system；
Described engine operability is strong, it is ensured that can run well under the conditions of extreme parameters.
The invention has the beneficial effects as follows: a kind of change fuel pressure electric injection system disclosed by the invention and electromotor thereof,
Oil pressure adjusting part is controlled according to monitoring signal, it is ensured that fuel injector is corresponding at low fuel pressure by monitoring unit
Low discharge under disclosure satisfy that demand and the distributive value precision of the less amount of fuel of gasoline engine, and turn at big load height
Under speed operating mode by strengthen fuel injector input pressure so that injection flow to meet gasoline engine fuel demand big
Requirement, electromotor is normally, run efficiently；Ensure that electric injection system can be good at meeting electromotor difference work
The condition demand to amount of fuel, fuel injector flow controls accurately, and simple in construction, with low cost.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings:
Fig. 1 is the structural representation of the present invention；
Fig. 2 is enlarged drawing at the A of Fig. 1.
Detailed description of the invention
Fig. 1 is the structural representation of the present invention, and Fig. 2 is enlarged drawing at the A of Fig. 1, as it can be seen, the present embodiment
In change fuel pressure electric injection system, including fuel injector 1, oil pressure adjusting part and monitoring unit, described control
Unit is used for monitoring engine operating state and controlling fuel injector 1 oil spout according to monitoring signal and control oil pressure tune
The charge oil pressure of fuel injector 1 is adjusted by joint assembly；Described engine operating state includes the big load of electromotor
Speed conditions at the bottom of high speed conditions, Smaller load and other all load conditions relevant with fuel injection amount；
Monitoring unit at least includes that electronic control unit ECU4 and sensor, described sensor include for detecting solar term
The first sensor 2a of door position, for detecting the second sensor 2b of admission pressure and for detecting electromotor
3rd sensor 3 of rotating speed, ECU4 controls oil pressure adjusting part by the detection signal of sensor and controls oil spout
Device 1 sprays optimal fuel injection amount；Owing to the square root of fuel injector 1 flow to supply fuel pressure is directly proportional,
By being equipped with of oil pressure adjusting part and fuel injector 1, it is ensured that fuel injector 1 disclosure satisfy that vapour under low discharge
The demand of the less amount of fuel of oil machine and distributive value precision, and by strengthening oil spout under big load height speed conditions
The input pressure of device 1 is so that injection flow meets the requirement that gasoline engine fuel demand is big, it is ensured that electromotor is just
Often, run efficiently.
In the present embodiment, described fuel injector 1 is connected with fuel tank by fuel pump, and described oil pressure adjusting part is arranged
The fuel feeding that can be switched by control is formed between fuel injector 1 and fuel pump and between fuel injector 1 and fuel pump
At least two oil feeding lines that pressure is different；Described two oil feeding lines include suitable low pressure oil supply oil circuit and high pressure
Oil feeding line, being operated alone by two fuel pumps that high and low pressure oil feeding line can be independent is formed, it is possible to by one
Individual fuel pump simultaneously drives formation, and the present embodiment uses a fuel pump to drive and shape in an oil supply gallery
Become high and low pressure oil feeding line；Realize ejector charge oil pressure by the switching of two oil circuits to regulate, structure letter
Single, regulation is timely and accurate, and certainly, the switching of its high and low fuel pressure is by ECU control, in handoff procedure
Fuel flow write ECU accurately to control this process by the mode testing the data obtained fitting
Fuel injection amount.
In the present embodiment, described oil pressure adjusting part includes the reversal valve and at least two for switching oil feeding line
Individual fuel pressure regulator (includes fuel pressure regulator 6 and fuel pressure regulator 7), described fuel feeding oil
Being routed through arranging corresponding fuel pressure regulator on oil supply pipe to be formed, it is real that monitoring unit controls reversal valve
The switching of existing oil feeding line；The oil feeding line of different pressures is directly produced by fuel pressure regulator, can be by
The fuel oil of same fuel pump output is divided into two oil feeding lines of different pressures, and simple in construction is with low cost.
In the present embodiment, described reversal valve is four way solenoid valve 8, and described four way solenoid valve 8 includes valve body and electricity
Magnet valve core assembly 9, described valve body arranges oil-in 8a, the oil-out 8b and two pressure regulation access ports being interconnected
(including pressure regulation access port 8c and pressure regulation access port 8d), described pressure regulation access port is respectively arranged with fuel pressure
Actuator is used for adjusting hydraulic fluid port pressure, and electromagnetic valve core assembly is used for closing wherein under the control of monitoring unit
One pressure regulation access port and open another pressure regulation access port；Ensureing oil supply pipe simple in construction, oil pressure regulates
Modular construction is compact, easy for installation, and oil feeding line switching is in time.
In the present embodiment, said two pressure regulation access port is symmetrical arranged, the electromagnetic valve core 9a of electromagnetic valve core assembly
By being arranged between two pressure regulation access ports with single-degree-of-freedom reciprocating manner；As it can be seen, described four
Three-way electromagnetic valve 8, in " ten " structure, improves switch speed and the precision of oil feeding line in the present embodiment, it is ensured that spray
The accuracy of spray of oil device 1；Described electromagnetic valve core assembly 9 uses and can realize the object of the invention assembly in prior art,
Do not repeat them here；
In the present embodiment, described electromagnetic valve core 91 is clava and with along self axial sliding movement mode inner sleeve
In an excitation set 92 being fixedly installed within valve body 8, described electromagnetic valve core 91 is provided with for electromagnetic valve
The pretightning force that core 91 resets；Described excitation set 92 can be the outer set connecting control signal that spiral conducting line is wound
Body, excitation set 92 also has guide effect, it is ensured that the good stability of electromagnetic valve core 91 motion.
In the present embodiment, described electromagnetic valve core 91 two ends are arc and can partly stretch into respectively in pressure regulation access port
Realize sealing；Arcuate structure is beneficial to reduce end face resistance, can be self-align, it is ensured that seal stable and tight.
In the present embodiment, outside described electromagnetic valve core 91, it is arranged with the helical spring 93 of a described pretightning force of offer,
Described helical spring 93 is fixed on electromagnetic valve core 91 by one end, and the other end is fixed on the inwall of valve body 8；Described
Electromagnetic valve core 91 fixed jacket one, for fixing the mounting ring 94 of helical spring 93, is placed on excitation in mounting ring 94
In set 92 and can reduce frictional resistance, steady along self axially-movable of helical spring 93 beneficially electromagnetic valve core 91
Qualitative, it is ensured that four-way electromagnetic Vavle switching is smooth and easy.
In the present embodiment, described fuel pressure regulator is pressure regulator valve, the pressure modulating opening of pressure regulator valve and corresponding pressure regulation
Access port connects, and the refluxing opening of pressure regulator valve is connected with fuel tank 11 by an oil return pipe 10；Ensure different fuel feeding oil
Pressure stability in road, improves the stability of oil spout fuel injector 1, and described pressure regulator valve can use existing energy to realize
The existing pressure regulator valve structure of the object of the invention, does not repeats them here.
In the present embodiment, it is provided with between oil-out 8b and the oil-in of fuel injector 1 of described four way solenoid valve 8
Fuel filter 12；Fuel oil is filtered by fuel filter 12, it is to avoid fuel injector 1 blocks, it is ensured that oil spout is suitable
Smooth and accurate.
In the present embodiment, described fuel injector 1 is arranged in the air intake duct 13 of cylinder, the injection direction of fuel injector 1
Just to the air intake valve 14 being arranged at air intake duct end；The combustion gas making fuel injector 1 spray enters with from air throttle 15
Air be mixed to form air mixture and enter cylinder combustion.
The invention also discloses a kind of electromotor 16, described electromotor is provided with above-mentioned change fuel pressure EFI system
System；Described electromotor is practical, it is ensured that can run well under the conditions of extreme parameters.
Finally illustrate, above example only in order to technical scheme to be described and unrestricted, although
With reference to preferred embodiment, the present invention is described in detail, it will be understood by those within the art that,
Technical scheme can be modified or equivalent, without deviating from technical solution of the present invention
Objective and scope, it all should be contained in the middle of scope of the presently claimed invention.
Claims (10)
1. one kind becomes fuel pressure electric injection system, it is characterised in that: include fuel injector, oil pressure adjusting part and prison
Control unit, described control unit is used for monitoring engine operating state and controlling fuel injector spray according to monitoring signal
The charge oil pressure of fuel injector is adjusted by oil and control oil pressure adjusting part.
Change fuel pressure electric injection system the most according to claim 1, it is characterised in that: described fuel injector
Connected with fuel tank by fuel pump, described oil pressure adjusting part be arranged between fuel injector and fuel pump and
At least two oil feeding lines that the charge oil pressure that can be switched by control is different are formed between fuel injector from fuel pump.
Change fuel pressure electric injection system the most according to claim 2, it is characterised in that: described oil pressure is adjusted
Joint assembly includes the reversal valve for switching oil feeding line and at least two fuel pressure regulator, described fuel feeding
Oil is routed through arranging corresponding fuel pressure regulator on oil supply pipe and is formed, and monitoring unit controls reversal valve
Realize the switching of oil feeding line.
Change fuel pressure electric injection system the most according to claim 3, it is characterised in that: described reversal valve
For four way solenoid valve, described four way solenoid valve includes valve body and electromagnetic valve core assembly, and described valve body is arranged mutually
Oil-in, oil-out and two pressure regulation access ports of connection, described pressure regulation access port is respectively arranged with fuel oil pressure
Draught control mechanism is used for adjusting hydraulic fluid port pressure, and electromagnetic valve core assembly is used for closing it under the control of monitoring unit
In a pressure regulation access port and open another pressure regulation access port.
Change fuel pressure electric injection system the most according to claim 4, it is characterised in that: said two is adjusted
Crimping entrance is symmetrical arranged, and the electromagnetic valve core of electromagnetic valve core assembly is by setting with single-degree-of-freedom reciprocating manner
It is placed between two pressure regulation access ports.
Change fuel pressure electric injection system the most according to claim 5, it is characterised in that: described electromagnetic valve
Core is clava and to be placed on an excitation being fixedly installed on valve inner along self axial sliding movement mode
In set, described electromagnetic valve core is provided with the pretightning force resetted for electromagnetic valve core.
Change fuel pressure electric injection system the most according to claim 6, it is characterised in that: described electromagnetic valve
Core two ends are arc and can partly stretch into realization sealing in pressure regulation access port respectively.
Change fuel pressure electric injection system the most according to claim 7, it is characterised in that: described electromagnetic valve
Being arranged with the helical spring of a described pretightning force of offer outside core, described helical spring is fixed on electromagnetism by one end
Spool, the other end is fixed on the inwall of valve body.
Change fuel pressure electric injection system the most according to claim 1, it is characterised in that: described fuel oil pressure
Draught control mechanism is pressure regulator valve, and the pressure modulating opening of pressure regulator valve connects with corresponding pressure regulation access port, the refluxing opening of pressure regulator valve
Connected with fuel tank by an oil return pipe.
10. sending out of the change fuel pressure electric injection system that a kind is provided with described in claim 1-9 any claim
Motivation, it is characterised in that: described electromotor is provided with described change fuel pressure electric injection system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206094.7A CN105863907B (en) | 2016-04-05 | 2016-04-05 | Become fuel pressure electric injection system and its engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206094.7A CN105863907B (en) | 2016-04-05 | 2016-04-05 | Become fuel pressure electric injection system and its engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105863907A true CN105863907A (en) | 2016-08-17 |
| CN105863907B CN105863907B (en) | 2018-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610206094.7A Active CN105863907B (en) | 2016-04-05 | 2016-04-05 | Become fuel pressure electric injection system and its engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN105863907B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6526944B1 (en) * | 1999-11-10 | 2003-03-04 | Robert Bosch Gmbh | Energy accumulator-supported control of the injection quantities in large diesel engines |
| US20030041842A1 (en) * | 2001-09-05 | 2003-03-06 | Unisia Jecs Corporation | Fuel-injection system |
| WO2008015690A1 (en) * | 2006-07-31 | 2008-02-07 | Radhakrishnan Nair Kambyan Val | Fuel economizer |
| CN103061928A (en) * | 2011-10-22 | 2013-04-24 | 成都市翻鑫家科技有限公司 | Two-way oil-pressure adjusting device |
| CN104314696A (en) * | 2014-08-26 | 2015-01-28 | 北京动力机械研究所 | Fuel metering valve control system and fuel regulator |
-
2016
- 2016-04-05 CN CN201610206094.7A patent/CN105863907B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6526944B1 (en) * | 1999-11-10 | 2003-03-04 | Robert Bosch Gmbh | Energy accumulator-supported control of the injection quantities in large diesel engines |
| US20030041842A1 (en) * | 2001-09-05 | 2003-03-06 | Unisia Jecs Corporation | Fuel-injection system |
| WO2008015690A1 (en) * | 2006-07-31 | 2008-02-07 | Radhakrishnan Nair Kambyan Val | Fuel economizer |
| CN103061928A (en) * | 2011-10-22 | 2013-04-24 | 成都市翻鑫家科技有限公司 | Two-way oil-pressure adjusting device |
| CN104314696A (en) * | 2014-08-26 | 2015-01-28 | 北京动力机械研究所 | Fuel metering valve control system and fuel regulator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105863907B (en) | 2018-11-16 |
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