CN109538389A - A kind of dual fuel engine system and its control method based on mechanical oil pump feed - Google Patents
A kind of dual fuel engine system and its control method based on mechanical oil pump feed Download PDFInfo
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- CN109538389A CN109538389A CN201910032627.8A CN201910032627A CN109538389A CN 109538389 A CN109538389 A CN 109538389A CN 201910032627 A CN201910032627 A CN 201910032627A CN 109538389 A CN109538389 A CN 109538389A
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- 239000000446 fuel Substances 0.000 title claims abstract description 158
- 230000009977 dual effect Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 68
- 239000002283 diesel fuel Substances 0.000 claims abstract description 42
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003345 natural gas Substances 0.000 claims abstract description 18
- 239000003921 oil Substances 0.000 claims description 75
- 239000000295 fuel oil Substances 0.000 claims description 20
- 238000006467 substitution reaction Methods 0.000 claims description 19
- 239000002737 fuel gas Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 239000000567 combustion gas Substances 0.000 claims description 10
- 239000002828 fuel tank Substances 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 239000003949 liquefied natural gas Substances 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 abstract description 37
- 238000002347 injection Methods 0.000 abstract description 37
- 230000001052 transient effect Effects 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 230000004044 response Effects 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 230000008450 motivation Effects 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
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- 230000009514 concussion Effects 0.000 description 2
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- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
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- 231100000719 pollutant Toxicity 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
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- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
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- 238000012827 research and development Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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
- 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
-
- 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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- 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
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
-
- 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
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/04—Gas-air mixing apparatus
-
- 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
- F02M37/04—Feeding by means of driven pumps
- F02M37/06—Feeding by means of driven pumps mechanically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
-
- 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 kind of Diesel-CNG dual fuel engine systems and its control method based on mechanical oil pump feed, the system and original pure diesel systems are parallel system, can under pure diesel fuel mode and diesel gas double fuel operating mode free switching, the system and device includes multiple sensors, actuator, harness and passes through the input feedback signal of sensor and exports the Diesel-CNG dual fuel engine controller ECU of control actuator apparatus.The system controls air inlet amount by electronic air throttle body assembly, the injection of diesel oil amount is controlled by automatically controlled high speed and high pressure overflow valve, the jet amount of natural gas is controlled by air nozzle, the air-fuel ratio that control engine operation is adjusted by lambda sensor feedback signal, guarantees the reliable and stable operation of dual fuel engine.The present invention has strong applicability, and structure is simple, and transient control is accurate, the distinguishing features such as at low cost.
Description
Technical field
The present invention relates to diesel engine technologies field, in particular to a kind of double fuel based on mechanical oil pump feed starts
Machine system and its control method.
Background technique
With increasingly developed, the transportation and communication of China's economy, the ownership of engineering machinery and ship rapidly increases
Add, leads to that fuel oil is in short supply and environmental pollution is got worse, therefore a clean weight for becoming internal combustion engine research instead of fuel
Want direction.Natural gas just has the advantages that rich reserves, octane number is high, and pollution is small, technology maturation as substitute Fuel of Internal Combustion Engine,
The yield of natural gas is significantly increased in the especially application of the production technique of shale gas.The internal combustion of development and application gas fuel
Machine is to solve the fuel oil effective ways in short supply with environmental pollution.It is big in particular for fuel consumption, in seriously polluted diesel oil
Combustion engine mixes the internal-combustion engine system of burning using Natural Gas & Diesel Dual Fuel Engine, and fuel can be made diversified, fuel cost is reduced, subtract
Few exhaust emission, has important practical significance.
As country to the increasingly strict of internal combustion engine discharge standard and improves, to meet stringent emission regulation demands, mesh
The fuel control system of preceding road movable type diesel vehicle has been all made of high-pressure common-rail injection system and matched post-processing system
System.But since the exploitation of high pressure co-rail system matches at high cost, the originals such as system parts are at high cost, and after-treatment device is at high cost
Cause, the diesel engine that diesel engine mobile for non-rice habitats and inland navigation craft use still use mechanical pump fueller.
As the emission regulation of non-rice habitats locomotor device is also being continuously improved, at the same country for inland water transport ship to river
The pay attention to day by day of water environment pollution, especially country are protection Yangtze river basin ecological environment, propose the planning in " gasification the Changjiang river ",
It has broad prospects for developing the diesel engine natural gas double-fuel system based on mechanical oil pump feed.
Diesel gas or LNG (Liquefied Natural Gas, liquefied natural gas) double fuel co-combustion system mode
For that can work under original use diesel oil operating mode, and it can be switched by system and mix burning using natural gas and diesel oil
Mode under work.Therefore, control system is required to keep the operating mode of original diesel oil constant, while switching can be passed through
It is transformed into the mode that diesel gas double fuel mixes burning, both of which can not influence to start according to switching condition free switching
Machine stable operation.Diesel gas double fuel blending and burning technology mainly has high pressure direct injection and diesel oil ignited technology two schemes in cylinder.
In cylinder high pressure direct injection technology be can be simultaneously to inner cylinder direct injection diesel oil and natural by integrated fuel injection device
Gas.But since the direct-injection nozzle of high-pressure diesel in cylinder and natural gas manufactures complexity, service life is short, expensive, not
To the popularization and application of large area.At present using the commonplace of diesel oil ignited technical solution.Diesel oil ignited technology is by the greatest extent may be used
The diesel oil compression ignition in engine that is ejected into that can be few is worked with lighting natural gas in suction cylinder, and being burnt with gas fuel, it is former to replace
Diesel fuel in need.For diesel oil ignited natural gas engine, under the premise of guaranteeing engine performance, realize
Higher substitution ratio of NG is the main target of dual fuel engine research and development, due to engine operation condition complexity, in difference
Substitution ratio of NG under operating condition is also different, therefore reasonably optimizing improves the important exploitation mesh that substitution rate is dual fuel engine
Mark, it is therefore desirable to the diesel injection and natural gas injection of dual fuel engine are accurately controlled, it could be effective and reasonable
Raising substitution rate.
Diesel pump is one of the important component of diesel engine supply and jet control system, can be according to different diesel oil
The requirement of engine uses different types of diesel pump, leads diesel pump to be applied at present and is divided into mechanical inline pump, electric control linearly arranged
Pump, dispensing pump, electronic control dispensing pump, electronically controlled unit pump and high voltage common rail pump.Mechanical inline pump, electric control linearly arranged pump, dispensing pump,
Electronic control dispensing pump, electronically controlled unit pump are all to spray work of burning in diesel oil to engine by hydraulic injection device, belong to mechanical pump
Scope diesel pump.High voltage common rail pump is to spray work of burning in diesel oil to engine by electric-controlled fuel injector, belongs to electronic control
Diesel pump.Diesel oil Injection Control for the dual fuel engine using different type diesel pump is diesel gas double fuel
The antecedent basis of engine.
Such as patent (patent name: the control system and its control method of the oil gas dual-fuel engine of mechanical oil pump feed；
Patent publication No.: CN104033256A) propose a kind of control system and control method for double-fuel diesel pump, but should
Problem of the existing technology is: 1) to the bad adaptability of different types of mechanical pump.The system can only pump full diesel tool
The control in System describe is carried out, electric control linearly arranged pump and electronic control dispensing pump are such as used, which can not carry out diesel injection amount
Control, or the control exploitation and matching and calibration that need to work to electric control linearly arranged pump and electronic control dispensing pump in diesel fuel mode, are caused out
It is huge to send out cost.
2) this control system can not carry out diesel gas double fuel operation under the full working scope of engine.According to machine
The mechanical design structure of tool pump, start and idling operation under diesel oil supply can not pass through the accelerator rod tune of oil pump
Whole, causing diesel gas double fuel minimum diesel injection amount is that under idling conditions therefore diesel oil distributive value is caused in idling
It is with the substitution rate of diesel gas double fuel under running on the lower load not high, strong influence system it is economical.
3) it is unable to improve and solves injection pump cavitation pitting that mechanical pump structure designs itself and injection tubing pressure oscillations cause
After end of injection secondary injection, cause fuel consumption high, pollutant emission is high.
4) mechanical structure adjusts oil mass, and structure is complicated, and mechanical engagement and abrasion cause distributive value deviation big, while transient state is rung
Should be slow, it is unable to satisfy engine operating demands.The mechanical pump indicated from figure one can be seen that system and replace original by E-Gas
The guy structure for having the mechanical pedal of mechanical pump and connecting with mechanical pump is drawn using automatically controlled throttle actuator by control throttle
The position of bar adjusts distributive value, this to pass through that system structure is complicated, bindiny mechanism's control of actuator and mechanical accelerator rod
System adjustment distributive value, which can generate mechanical structure, can generate cooperation deviation and abrasion, can not only mix natural gas mechanical pump under burning mode
Fuel delivery generates deviation, also causes a deviation to mechanical pump fuel delivery under original diesel fuel mode, causes to start under original diesel fuel mode
The problem of machine is run.
5) system transients low-response is unable to satisfy engine stabilizer service requirement.Engine is right in the state of operating
Transient response is needed in oil injection time and distributive value, can just engine stabilizer be made to operate.Due to the dynamic response of mechanical structure
Slowly, the transient response of distributive value is caused not to be able to satisfy the requirement of engine, under the unstable and performance that will cause engine operating
Drop.
6) system structure complexity needs to install additional CMPS Camshaft Position Sensor 13 and crankshaft position sensor 14, while mating
It needs to install cam signal disk additional on camshaft, installs crankshaft signal disk additional on crankshaft, make system structure and control more multiple
It is miscellaneous.Because system control needs the job order signal of each cylinder of engine and each cylinder working status signal therefore need to install additional convex
Wheel shaft position sensor and cam signal disk install crankshaft position sensor and crankshaft signal disk additional for calculating hair for sentencing cylinder
The corresponding position of motivation revolving speed and engine tope center.The program causes system structure and control complicated.
7) system cost is high, and due to system structure complexity, causing system to install additional, component is more, and system cost is high.
For another example patent publication No. is that the patent of invention of CN1570366A proposes a kind of electric controlled in-line combined pump/valve-pipe-nozzle
Spraying system is complete automatically controlledization to inline pump, is a kind of electric control pump of brand-new design, poor with the structure of original mechanical pump
Different huge, it is applied to have the disadvantage that in the control for the engine that diesel dual-fuel mixes burning mode: 1) control is complicated,
The system that diesel dual-fuel based on mechanical oil pump feed mixes the engine of burning mode mainly considers it is in existing machinery oil pump feed
The amount of injection for reducing diesel oil how is controlled in system, the natural gas acting of injection is lighted, to keep the defeated of original diesel engine
Power and torque out.Normal operation of original diesel engine under pure diesel fuel mode is also kept simultaneously.Therefore it needs to original
It is controlled on the basis of diesel engine, reduces change corresponding construction and component to the greatest extent, to reach in original diesel fuel mode and mix burning mould
The normal operation of formula and the free switching of both of which are a kind of electric control pump of brand-new design, are measured by electronic fuel injection
For the mechanical oil supply structure of original mechanical pump, the control of system is required complicated.
2) cost can not be estimated, since it is sent out for a kind of electric control pump of brand-new design for running under original diesel fuel mode
Motivation needs again matching and calibration exploitation and test, and development cost is huge, is not suitable for diesel dual-fuel and mixes starting for burning mode
The control of machine.
Therefore the present invention is proposed using the Electrocontrolled high-pressure high speed electromagnetic valve gear with pressure sensor feedback for controlling
Diesel dual-fuel mixes the Engine Injection Mass of burning mode, and suitable for the control of diesel pumps all in addition to high-pressure common-rail oil pump, this is
System is parallel organization with original pure diesel systems, keeps original mechanical pump fuel system structure completely under pure diesel fuel mode, is protected
The runnability for having demonstrate,proved original diesel fuel mode engine, in the case where diesel gas double fuel mixes burning mode by being passed with pressure
The control of the Electrocontrolled high-pressure high speed electromagnetic valve gear of sensor feedback adjusts engine transient state under different operating conditions and adjusts bavin
Oily distributive value reaches the accurate control of engine diesel oil distributive value under different operating conditions, can also flexibly control distributive value
Reduction, avoid the limitation of mechanical pump minimum fuel, realize and ignited natural gas based on the micro diesel injection of all mechanical pumps
Function, improve diesel gas double fuel mix burn natural gas substitution rate.Spray is controlled using automatically controlled high speed and high pressure solenoid valve
Oil terminates, and fuel oil injection can be cut off by quick overflow, avoids the ideal oil spout figure for generating oil spout cavitation pitting, this system tool
There is strong applicability, structure is simple, and transient control is accurate, the distinguishing features such as at low cost.
Summary of the invention
In view of the above-mentioned problems, it is an object of the invention to propose a kind of dual fuel engine system based on mechanical oil pump feed
System and its control method have strong applicability, and structure is simple, and transient control is accurate, the distinguishing features such as at low cost.
The technical proposal adopted by the invention to solve the above technical problems is that: a kind of diesel oil day based on mechanical oil pump feed
Right gas dual fuel engine system characterized by comprising engine, gas burning system, fuel system, battery and control system
System, wherein
The fuel system includes: fuel tank, mechanical diesel pump, high-pressure oil pipe, overflow oil pipe, Electrocontrolled high-pressure high speed electricity
Magnet valve, fuel pressure transmitter, atomizer, accelerator rod position sensor, the fuel tank pass through described in high-pressure oil pipe connection
The oil outlet of the oil inlet of mechanical diesel pump, the machinery diesel pump connects the fuel pressure transmitter by high-pressure oil pipe
One end, the other end of the fuel pressure transmitter connects the oil inlet of the Electrocontrolled high-pressure high-speed electromagnetic valve, described automatically controlled
The oil outlet of high-voltage high-speed solenoid valve connects the atomizer by high-pressure oil pipe, and the Electrocontrolled high-pressure high-speed electromagnetic valve overflows
It flows hydraulic fluid port and connects the fuel tank；
The gas burning system includes: storage cylinder, bottle valve, gas filter, pressure reducer, jet common rail assembly, jet temperature
Pressure sensor, air nozzle, mixer, air filter, turbocharger, electronic air throttle body assembly, intake air temperature pressure is spent to pass
Sensor, throttle position sensor, fuel gas conduit, inlet manifold, exhaust pipe, exhaust gas temperature sensor, lambda sensor, the gas
Cylinder valve is mounted on the bottleneck of the storage cylinder, and the storage cylinder connects the gas filter, the combustion gas by fuel gas conduit
Filter connects the pressure reducer by fuel gas conduit, and the pressure reducer connects the jet common rail assembly, institute by fuel gas conduit
Stating jet common rail assembly includes inlet manifold and outlet general pipeline, and it is total that multiple air nozzle parallel side-by-sides are mounted on the air inlet
Between pipe and outlet general pipeline, the outlet general pipeline is connected to mixer by fuel gas conduit, and the air filter connects the turbine and increases
Depressor, the turbocharger connect the electronic air throttle body assembly, the electronic throttle assembly by flange with it is described
Mixer connection, the mixer are connected to the air inlet of engine by inlet manifold, wherein the electronic air throttle body
Throttle position sensor is installed on assembly, is provided on the pipeline between the electronic air throttle body assembly and mixer
Air inlet temperature/pressure sensor, the exhaust outlet of the engine connect the exhaust pipe, and the lambda sensor and delivery temperature pass
Sensor is mounted on the exhaust pipe at air exit；
The control system includes: ECU controller, change-over switch, antenna, mobile terminal, PC terminal, Cloud Server, institute
The input/output terminal for stating ECU controller connects the change-over switch, and the change-over switch is separately connected described by CAN bus
Fuel pressure transmitter, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position sensor, bottle valve, jet temperature pressure sensing
Device, air nozzle, air inlet temperature/pressure sensor, throttle position sensor, exhaust gas temperature sensor, lambda sensor are to realize
Data receiver and signal execute, and the ECU controller is connected to the mobile terminal and PC terminal by antenna wireless, described
Communication connection is carried out by Cloud Server between mobile terminal and PC terminal；
The battery is respectively the fuel pressure transmitter, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position biography
Sensor, bottle valve, jet temperature pressure sensor, air nozzle, air inlet temperature/pressure sensor, throttle position sensor, row
Gas temperature sensor, lambda sensor, ECU controller, change-over switch provide operating voltage.
Further, water temperature sensor is also equipped on the engine, the water temperature sensor passes through the change-over switch
The ECU controller is connected, the battery is water temperature sensor power supply.
Further, storage has natural gas or liquefied natural gas in the storage cylinder.
Further, the diesel oil mechanical pump is mechanical inline pump, electric control linearly arranged pump, dispensing pump, and electronic control dispensing pump is automatically controlled
One of monoblock pump.
A kind of control method of the Diesel-CNG dual fuel engine system based on mechanical oil pump feed, which is characterized in that
Include the following steps:
Step S1: whether Diesel-CNG dual fuel engine system of the detection based on mechanical oil pump feed be working properly；
Step S2: by the work of change-over switch detection system in which kind of operating mode, pure fuel oil service mode or fuel oil/
Combustion gas double fuel operating mode；
Step S3: under pure fuel oil service mode, distributive value is controlled by mechanical pump and fuel injector；
Step S4: under oil and gas double fuel operating mode, ECU controller is special using the fuel feeding of mechanical diesel pump
Property MAP, pilot fuel amount and gas quantity is calculated in conjunction with the fuel oil substitution rate MAP of setting, after obtaining pilot fuel amount, lead to
The feedback signal for crossing fuel pressure transmitter controls Electrocontrolled high-pressure high-speed electromagnetic valve, sprays by fuel injector, to obtain reality
Pilot fuel amount, wherein gas quantity is controlled by combustion gas mouth, and air capacity is opened by the air throttle of electronic air throttle body assembly
Degree is controlled and is realized, to obtain ideal air-fuel ratio.
Further, fuel oil substitution rate formula Qdiesel=(1-r) × Q and Qgas=r × Q, calculates separately and draws
Fire diesel oil amount Qdiesel and gaseous fuel quantity Qgas.
Further, the size of the throttle opening is determined by air capacity, and air capacity is according to known gas quantity, then leads to
Air-fuel ratio is crossed to be calculated.
Further, the measurement of the air capacity passes through the air inflow model of air inlet temperature/pressure sensor combination engine
It is calculated, forms closed-loop control between the air inlet temperature/pressure sensor, electronic air throttle body assembly and ECU controller
System.
Further, the air-fuel ratio is calculated with following formula: Ga=ρ Vc η v
In formula: Ga-air quality；
ρ --- the atmospheric density (kg/m3) in air inlet pipe；
Vc --- volume of cylinder (m3)；
η v --- volumetric efficiency.
Perfect gas equation ρ=P*M/ (R*T) substitution above formula is obtained:
C=Vc/R in formula is constant for specific model；
M --- be air molecule amount (kg/mol)；
R --- gas constant, R=8.314J/mol*K；
P --- air inlet pipe air absolute pressure (kPa)；
T --- air inlet pipe air absolute temperature (K).
The present invention has the advantages that 1) present invention be completely independent system, do not influence original diesel engine air inlet,
Fuel feeding, burning and exhaust system guarantee original diesel fuel mode engine operation.
2) present system can be adapted for all diesel pumps in addition to high-pressure common rail jet pump, to different types of machine
Tool pumps adaptable, and present system is automatically controlled by the high pressure oil pipeline installation between mechanical diesel pump and fuel injector
High-voltage high-speed solenoid valve controls the amount of injection of diesel oil, does not carry out any change to original diesel oil mechanical pump, still maintains former
There is the characteristic of diesel pump, therefore to any diesel pump for controlling diesel injection amount using fuel-injection pressure, present system
It is applicable.
3) present invention can carry out diesel gas double fuel operation under the full working scope of engine, improve substitution rate.Root
It, can be under any operating condition to bavin by the control of Electrocontrolled high-pressure high-speed electromagnetic valve according to the feedback signal of fuel pressure transmitter
Control is adjusted in oily natural gas double-fuel diesel injection amount, improves the comprehensive substitution rate of full working scope of diesel gas double fuel.
4) present system can solve the injection pump cavitation pitting and injection tubing pressure that mechanical diesel oil pump configuration designs itself
The secondary injection of after end of injection caused by concussion reduces fuel consumption and pollutant emission.Present system passes through control electricity
The unlatching for controlling high-voltage high-speed solenoid valve, quickly makes fuel overflow, quickly reduces fuel pressure, avoid high pressure fuel to oil spout
The cavitation pitting of pump and injection tubing generate pressure oscillations improve the use of diesel pump to avoid the cavitation pitting to diesel pump
Service life, while after end of injection is avoided, the secondary injection as caused by the concussion of oily overpressure reduces the consumption of fuel oil,
It has been correspondingly improved the substitution rate of gas fuel.
5) present system uses the control of Electrocontrolled high-pressure high-speed electromagnetic valve, has accurate to the transient state of fuel injection amount
Control.Present system controls distributive value using Electrocontrolled high-pressure high-speed electromagnetic valve, avoids answering for mechanical structure adjustment distributive value
Miscellaneous structure and since mechanical engagement and abrasion cause that distributive value deviation is big and transient response is slow and each cylinder distributive value is uneven
The problem of, ensure the uniformity, stability and consistency of Diesel-CNG dual fuel engine runnability.
6) present system is used to sentence cylinder using fuel pressure transmitter, while detecting tubing pressure, and with the pressure of every cylinder
Power detects signal as fiducial time, calculates the revolving speed of engine.Present system is installed respectively using fuel pressure transmitter
On mechanical diesel pump to the oil pipe between fuel injector, when fuel pressure transmitter detect signal generate, that is, indicate this cylinder will
It does work state, while the revolving speed of present engine can be calculated according to the signal interval of every cylinder fuel pressure transmitter,
Without installing CMPS Camshaft Position Sensor and crankshaft position sensor and mating installation cam signal disk and crankshaft letter additional
Dialer etc..
7) present system is at low cost.Due to system structure exquisiteness, complicated installation component is avoided, system can be reduced
Components cost and use process in maintenance cost.
8) present system has long range positioning, calibration and diagnostic function, provides cloud service.This system is internally integrated GPS
And gsm module, vehicle can be positioned, long-range calibration can be realized with system ECU controller telecommunication by gsm module
Maintenance service is provided to client with system diagnostics function and by the cloud platform at the end PC.
Detailed description of the invention
It, below will be to tool in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Body embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing be some embodiments of the present invention, for those of ordinary skill in the art, what is do not made the creative labor
Under the premise of, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is Diesel-CNG dual fuel engine system schematic of the invention.
Wherein: 1, storage cylinder；2, bottle valve；3, gas filter；4, pressure reducer；5, jet common rail assembly；6, jet temperature
Spend pressure sensor；7, air nozzle；8, mixer；9, connecting flange 10, air inlet temperature/pressure sensor；11, throttle position
Sensor；12, electronic air throttle body assembly；13, turbocharger；14, air filter；15, Electrocontrolled high-pressure high-speed electromagnetic valve；16,
Overflow oil pipe；17, fuel pressure transmitter；18, mechanical diesel pump；19, draw rod positions sensor；20, exhaust pipe；21, it sprays
Oil nozzle；22, fuel tank；23, water temperature sensor；24, lambda sensor；25, exhaust gas temperature sensor；26, change-over switch；27,
ECU controller；28, antenna；29 mobile terminals；30, diagnosis terminal；31 Cloud Servers；32, engine；33, battery；34,
Inlet manifold；35 fuel gas conduits；36, high-pressure oil pipe；37, CAN bus.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described reality
Applying example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to what the present invention protected
Range.
In the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, be only for
Convenient for the description present invention and simplify description, rather than the device or element of indication or suggestion meaning there must be specific side
Position is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " the
Two ", " third " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
As shown in Figure 1, one embodiment of the present of invention provides a kind of diesel gas double fuel based on mechanical oil pump feed
Engine system characterized by comprising engine, gas burning system, fuel system, battery and control system, wherein
The fuel system includes: fuel tank, mechanical diesel pump, high-pressure oil pipe, overflow oil pipe, Electrocontrolled high-pressure high speed electricity
Magnet valve, fuel pressure transmitter, atomizer, accelerator rod position sensor, the fuel tank pass through described in high-pressure oil pipe connection
The oil outlet of the oil inlet of mechanical diesel pump, the machinery diesel pump connects the fuel pressure transmitter by high-pressure oil pipe
One end, the other end of the fuel pressure transmitter connects the oil inlet of the Electrocontrolled high-pressure high-speed electromagnetic valve, described automatically controlled
The oil outlet of high-voltage high-speed solenoid valve connects the atomizer by high-pressure oil pipe, and the Electrocontrolled high-pressure high-speed electromagnetic valve overflows
It flows hydraulic fluid port and connects the fuel tank；Distributive value is controlled using Electrocontrolled high-pressure high-speed electromagnetic valve, avoids mechanical structure adjustment spray
The labyrinth of oil mass and since mechanical engagement and abrasion cause distributive value deviation greatly and the slow problem of transient response, guarantee
The stability and consistency of Diesel-CNG dual fuel engine runnability, the atomizer are set to the engine
Jet, the fuel pressure transmitter using fuel pressure transmitter for sentencing cylinder, while detecting oil pipe for sentencing cylinder
Pressure, and using the pressure detecting signal of every cylinder as fiducial time, calculate the revolving speed of engine.Present system uses fuel oil
Pressure sensor is separately mounted on mechanical diesel pump to the oil pipe between fuel injector, when fuel pressure transmitter detects letter
It number generates, that is, indicates that this cylinder will do work state, while can be according to the signal interval meter of every cylinder fuel pressure transmitter
The revolving speed for calculating present engine, without installing CMPS Camshaft Position Sensor and crankshaft position sensor and mating installation additional
Cam signal disk and crankshaft signal disk etc.；
The gas burning system includes: storage cylinder, bottle valve, gas filter, pressure reducer, jet common rail assembly, jet temperature
Pressure sensor, air nozzle, mixer, air filter, turbocharger, electronic air throttle body assembly, intake air temperature pressure is spent to pass
Sensor, throttle position sensor, fuel gas conduit, inlet manifold, exhaust pipe, exhaust gas temperature sensor, lambda sensor, the gas
Cylinder valve is mounted on the bottleneck of the storage cylinder, and the storage cylinder connects the gas filter, the combustion gas by fuel gas conduit
Filter connects the pressure reducer by fuel gas conduit, and the pressure reducer connects the jet common rail assembly, institute by fuel gas conduit
Stating jet common rail assembly includes inlet manifold and outlet general pipeline, and it is total that multiple air nozzle parallel side-by-sides are mounted on the air inlet
Between pipe and outlet general pipeline, the outlet general pipeline is connected to mixer by fuel gas conduit, and the air filter connects the turbine and increases
Depressor, the turbocharger connect the electronic air throttle body assembly, the electronic throttle assembly by flange with it is described
Mixer connection, the mixer are connected to the air inlet of engine by inlet manifold, wherein the electronic air throttle body
Throttle position sensor is installed on assembly, is provided on the pipeline between the electronic air throttle body assembly and mixer
Air inlet temperature/pressure sensor, the exhaust outlet of the engine connect the exhaust pipe, and the lambda sensor and delivery temperature pass
Sensor is mounted on the exhaust pipe at air exit, and lambda sensor is for measuring engine operation air-fuel ratio, exhaust temperature
Degree sensor is for measuring engine exhaust temperature, and arrange warm protection, the purpose for arranging temperature protection is to reduce engine operation
When delivery temperature, after detection row's temperature, by reducing diesel oil substitution rate r, reducing total fuel injection quantity or be switched to pure bavin
Oily mode realizes row's temperature protection control, such as needs to carry out more than 580 DEG C in the subsequent row's temperature of turbocharger (whirlpool heel row temperature)
Row's temperature protection.
The control system includes: ECU controller, change-over switch, antenna, mobile terminal, PC terminal, Cloud Server, institute
The input/output terminal for stating ECU controller connects the change-over switch, and the change-over switch is separately connected described by CAN bus
Fuel pressure transmitter, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position sensor, bottle valve, jet temperature pressure sensing
Device, air nozzle, air inlet temperature/pressure sensor, throttle position sensor, exhaust gas temperature sensor, lambda sensor are to realize
Data receiver and signal execute, and the ECU controller is connected to the mobile terminal and PC terminal by antenna wireless, described
Communication connection is carried out by Cloud Server between mobile terminal and PC terminal；GPS and GSM mould is also integrated in the control system
Block can position vehicle, can realize long-range calibration and system with system ECU controller telecommunication by gsm module
Diagnostic function simultaneously provides maintenance service to client by the cloud platform at the end PC.
The battery is respectively the fuel pressure transmitter, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position biography
Sensor, bottle valve, jet temperature pressure sensor, air nozzle, air inlet temperature/pressure sensor, throttle position sensor, row
Gas temperature sensor, lambda sensor, ECU controller, change-over switch provide operating voltage.
Further, water temperature sensor is also equipped on the engine, the water temperature sensor passes through the change-over switch
The ECU controller is connected, the battery is water temperature sensor power supply.
Further, storage has natural gas or liquefied natural gas in the storage cylinder.
Further, the diesel oil mechanical pump is mechanical inline pump, electric control linearly arranged pump, dispensing pump, and electronic control dispensing pump is automatically controlled
One of monoblock pump.
A kind of another embodiment of the invention: Diesel-CNG dual fuel engine system based on mechanical oil pump feed
Control method, which comprises the steps of:
Step S1: whether Diesel-CNG dual fuel engine system of the detection based on mechanical oil pump feed be working properly；
Step S2: by the work of change-over switch detection system in which kind of operating mode, pure fuel oil service mode or fuel oil/
Combustion gas double fuel operating mode；
Step S3: under pure fuel oil service mode, distributive value is controlled by mechanical pump and fuel injector；
Step S4: under oil and gas double fuel operating mode, ECU controller is special using the fuel feeding of mechanical diesel pump
Property MAP, pilot fuel amount and gas quantity is calculated in conjunction with the fuel oil substitution rate MAP of setting, after obtaining pilot fuel amount, lead to
The feedback signal for crossing fuel pressure transmitter controls Electrocontrolled high-pressure high-speed electromagnetic valve, sprays by fuel injector, to obtain reality
Pilot fuel amount, wherein gas quantity is controlled by combustion gas mouth, and air capacity is opened by the air throttle of electronic air throttle body assembly
Degree is controlled and is realized, to obtain ideal air-fuel ratio.Wherein diesel oil/combustion gas double fuel operating mode condition mainly has: (1)
The water temperature of diesel engine is in OK range, is greater than setting low temperature (such as 60 DEG C) and is less than the overtemperature of setting (such as simultaneously
93 DEG C), temperature is excessively high or relatively low engine should not all work in dual fuel mode, and (2) engine speed meets switching item
Part, such as larger than 1000r/min, the signal of (3) jet temperature pressure sensor show that the amount of storage of the combustion gas of storage cylinder meets hair
Motivation enters diesel oil/combustion gas double fuel operating mode operation, and the voltage of (4) battery meets normal running (operation) conditions, and battery does not lose
Electricity, (5) engine control system is with the presence or absence of failure etc..
Further, fuel oil substitution rate formula Qdiesel=(1-r) × Q and Qgas=r × Q, calculates separately and draws
Fire diesel oil amount Qdiesel and gaseous fuel quantity Qgas.
Further, the size of the throttle opening is determined by air capacity, and air capacity is according to known gas quantity, then leads to
Air-fuel ratio is crossed to be calculated.
Further, the measurement of the air capacity passes through the air inflow model of air inlet temperature/pressure sensor combination engine
It is calculated, forms closed-loop control between the air inlet temperature/pressure sensor, electronic air throttle body assembly and ECU controller
System.
Further, the air-fuel ratio is calculated with following formula: Ga=ρ Vc η v
In formula: Ga-air quality；
ρ --- the atmospheric density (kg/m3) in air inlet pipe；
Vc --- volume of cylinder (m3)；
η v --- volumetric efficiency.
Perfect gas equation ρ=P*M/ (R*T) substitution above formula is obtained:
C=Vc/R in formula is constant for specific model；
M --- be air molecule amount (kg/mol)；
R --- gas constant, R=8.314J/mol*K；
P --- air inlet pipe air absolute pressure (kPa)；
T --- air inlet pipe air absolute temperature (K).
It can be seen that ECU controller can be according to cylinder target inlet air quality Ga, air inlet temperature after as long as volumetric efficiency determines
It spends T and calculates target inlet air manifold absolute pressure P.Volumetric efficiency is determined by engine calibrating test.According to setting (calibration)
Target air-fuel ratio carries out the closed loop feedback amendment of pilot fuel amount and gaseous fuel quantity, by adjusting right amount of fuel and gas is drawn
Fuel quantity keeps the actual air-fuel ratio of engine operation consistent with target air-fuel ratio, and obtains final pilot fuel amount and gas
Fuel quantity.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；
Although present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its
It is still possible to modify the technical solutions described in the foregoing embodiments, or special to some or all of technologies
Sign is equivalently replaced；And these are modified or replaceed, various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
The range of technical solution.
Claims (9)
1. a kind of dual fuel engine system based on mechanical oil pump feed characterized by comprising engine, gas burning system, combustion
Oil system, battery and control system, wherein
The fuel system include: fuel tank, mechanical diesel pump, high-pressure oil pipe, overflow oil pipe, Electrocontrolled high-pressure high-speed electromagnetic valve,
Fuel pressure transmitter, atomizer, accelerator rod position sensor, the fuel tank connect the mechanical bavin by high-pressure oil pipe
The oil outlet of the oil inlet of oil pump, the machinery diesel pump connects one end of the fuel pressure transmitter by high-pressure oil pipe,
The other end of the fuel pressure transmitter connects the oil inlet of the Electrocontrolled high-pressure high-speed electromagnetic valve, the Electrocontrolled high-pressure high speed
The oil outlet of solenoid valve connects the atomizer, the overflow hydraulic fluid port connection of the Electrocontrolled high-pressure high-speed electromagnetic valve by high-pressure oil pipe
The fuel tank；
The gas burning system includes: storage cylinder, bottle valve, gas filter, pressure reducer, jet common rail assembly, jet temperature pressure
Force snesor, air nozzle, mixer, air filter, turbocharger, electronic air throttle body assembly, air inlet temperature/pressure sensor,
Throttle position sensor, fuel gas conduit, inlet manifold, exhaust pipe, exhaust gas temperature sensor, lambda sensor, the bottle valve peace
On the bottleneck of the storage cylinder, the storage cylinder connects the gas filter, the gas filter by fuel gas conduit
The pressure reducer is connected by fuel gas conduit, the pressure reducer connects the jet common rail assembly by fuel gas conduit, and the jet is total
Rail assembly includes inlet manifold and outlet general pipeline, and multiple air nozzle parallel side-by-sides are mounted on the inlet manifold and outlet is total
Between pipe, the outlet general pipeline is connected to mixer by fuel gas conduit, and the air filter connects the turbocharger, the whirlpool
It takes turns booster and connects the electronic air throttle body assembly, the electronic throttle assembly is connect by flange with the mixer,
The mixer is connected to the air inlet of engine by inlet manifold, wherein is equipped on the electronic air throttle body assembly
Throttle position sensor is provided with intake air temperature pressure biography on the pipeline between the electronic air throttle body assembly and mixer
Sensor, the exhaust outlet of the engine connect the exhaust pipe, and the lambda sensor and exhaust gas temperature sensor are mounted on described
On exhaust pipe at air exit；
The control system includes: ECU controller, change-over switch, antenna, mobile terminal, PC terminal, Cloud Server, the ECU
The input/output terminal of controller connects the change-over switch, and the change-over switch is separately connected the fuel oil pressure by CAN bus
Force snesor, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position sensor, bottle valve, jet temperature pressure sensor, jet
Mouth, air inlet temperature/pressure sensor, throttle position sensor, exhaust gas temperature sensor, lambda sensor are to realize data receiver
Executed with signal, the ECU controller is connected to the mobile terminal and PC terminal by antenna wireless, the mobile terminal with
Communication connection is carried out by Cloud Server between PC terminal；
The battery be respectively the fuel pressure transmitter, Electrocontrolled high-pressure high-speed electromagnetic valve, accelerator rod position sensor,
Bottle valve, jet temperature pressure sensor, air nozzle, air inlet temperature/pressure sensor, throttle position sensor, delivery temperature
Sensor, lambda sensor, ECU controller, change-over switch provide operating voltage.
2. a kind of dual fuel engine system based on mechanical oil pump feed according to claim 1, which is characterized in that described
Water temperature sensor is also equipped on engine, the water temperature sensor connects the ECU controller, institute by the change-over switch
Battery is stated as water temperature sensor power supply.
3. a kind of dual fuel engine system based on mechanical oil pump feed according to claim 1, which is characterized in that described
Storage has natural gas or liquefied natural gas in storage cylinder.
4. a kind of dual fuel engine system based on mechanical oil pump feed according to claim 1, which is characterized in that described
Diesel oil mechanical pump is mechanical inline pump, electric control linearly arranged pump, dispensing pump, electronic control dispensing pump, one of electronically controlled unit pump.
5. a kind of a kind of controlling party of dual fuel engine system based on mechanical oil pump feed as described in claim 1-4 is any
Method, which comprises the steps of:
Step S1: whether Diesel-CNG dual fuel engine system of the detection based on mechanical oil pump feed be working properly；
Step S2: by the work of change-over switch detection system in which kind of operating mode, pure fuel oil service mode or oil and gas are double
Fuel work mode；
Step S3: under pure fuel oil service mode, distributive value is controlled by mechanical pump and fuel injector；
Step S4: under oil and gas double fuel operating mode, ECU controller utilizes the characteristic of fuel delivery of mechanical diesel pump
MAP is calculated pilot fuel amount and gas quantity in conjunction with the fuel oil substitution rate MAP of setting, after obtaining pilot fuel amount, passes through combustion
The feedback signal of oil pressure force snesor controls Electrocontrolled high-pressure high-speed electromagnetic valve, sprays by fuel injector, to obtain actual draw
Fire amount of fuel, wherein gas quantity is controlled by combustion gas mouth, and air capacity is controlled by the throttle opening of electronic air throttle body assembly
And it realizes.
6. a kind of control method of dual fuel engine system based on mechanical oil pump feed according to claim 5, special
Sign is that fuel oil substitution rate formula Qdiesel=(1-r) × Q and Qgas=r × Q calculates separately Pilot diesel quantity
Qdiesel and gaseous fuel quantity Qgas.
7. a kind of Diesel-CNG dual fuel engine system based on mechanical oil pump feed according to claim 6, special
Sign is that the size of the throttle opening is determined by air capacity, and air capacity is according to known gas quantity, then passes through air-fuel ratio meter
It obtains.
8. a kind of control method of dual fuel engine system based on mechanical oil pump feed according to claim 7, special
Sign is that the measurement of the air capacity is calculated by the air inflow model of air inlet temperature/pressure sensor combination engine,
Closed-loop control system is formed between the air inlet temperature/pressure sensor, electronic air throttle body assembly and ECU controller.
9. a kind of control method of dual fuel engine system based on mechanical oil pump feed according to claim 8, special
Sign is that the air-fuel ratio is calculated with following formula: Ga=ρ Vc η v
In formula: Ga-air quality；
ρ --- the atmospheric density (kg/m 3) in air inlet pipe；
Vc --- volume of cylinder (m 3)；
η v --- volumetric efficiency.
Perfect gas equation ρ=P*M/ (R*T) substitution above formula is obtained:
C=Vc/R in formula is constant for specific model；
M --- be air molecule amount (kg/mol)；
R --- gas constant, R=8.314J/mol*K；
P --- air inlet pipe air absolute pressure (kPa)；
T --- air inlet pipe air absolute temperature (K).
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| CN110173363A (en) * | 2019-05-28 | 2019-08-27 | 李洪金 | Double fuel numerical control device control system |
| CN113294266A (en) * | 2020-02-21 | 2021-08-24 | 中国石油天然气股份有限公司 | Air-fuel ratio regulating and controlling device and method for compressor |
| CN114221432B (en) * | 2021-12-16 | 2024-01-23 | 上海振华重工(集团)股份有限公司 | Crane multi-energy power supply system and control method thereof |
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