CN109915266A - A kind of dual-fuel engine combustion system peculiar to vessel and method - Google Patents
A kind of dual-fuel engine combustion system peculiar to vessel and method Download PDFInfo
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- CN109915266A CN109915266A CN201910347233.1A CN201910347233A CN109915266A CN 109915266 A CN109915266 A CN 109915266A CN 201910347233 A CN201910347233 A CN 201910347233A CN 109915266 A CN109915266 A CN 109915266A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention discloses a kind of dual-fuel engine combustion system peculiar to vessel and method, which includes: the fuel injector being arranged on cylinder assembly, Temperature of Working sensor and crank position and speed probe in cylinder；Electric-controlled co-rail diesel fuel supply device；Premixed natural gas feedway；BOG-EGR heat exchange subsystem and electronic control unit ECU；Temperature of Working sensor, crank position and speed probe, electric-controlled co-rail diesel fuel supply device, premixed natural gas feedway and BOG-EGR heat exchange subsystem are connected with the electronic control unit ECU respectively in the fuel injector, cylinder.Electronic control unit ECU can adjust oil injection time to efficiency optimum point, kindling in accurate cylinder may be implemented and control and then keep good combustion stability and engine power performance according to the temperature of working medium in cylinder and the location information of crank angle in the present invention；Replace original marine engine intercooler using heat exchanger, the efficient utilization of energy can be realized under the premise of not increasing economic cost.
Description
Technical field
The present invention relates to the technical fields of dual fuel engine peculiar to vessel, and in particular to controls oil spout based on Temperature of Working in cylinder
Dual-fuel engine combustion system peculiar to vessel and method.
Background technique
Increasingly strict and the energy with International Emissions regulation consumes excessively, using gaseous fuels such as natural gases as in
The main energy sources of combustion engine become social main trend.Compared with diesel engine, dual fuel engine peculiar to vessel has the soot close to zero
Discharge, NOXAlso it is greatly lowered, under reasonable Injection strategy, any power loss can not also be generated.
Low temperature combustion mode becomes the social hotspots of Recent study, and it is double fuel peculiar to vessel that chemical reactivity, which controls compression ignition,
The main low temperature combustion mode of engine, the call by pattern is beneficial to being precisely controlled diesel pilot time for spraying.It is domestic peculiar to vessel micro-
Spray ignition type dual fuel engine peculiar to vessel is in the engineering development stage, and control system still has very long for foreign countries
Road to do, but external electronic control injection technology can only also realize the automatic adjustment of distributive value according to the speed of crankshaft of engine,
Oil injection time still needs to people and carries out external amendment according to engineering experience.
The flash steam (Boil Off Gas, BOG) one of liquefied natural gas (liquefied Natural Gas, LNG) liquid tank
The problem of being all directly people's headache.Its presence and discharge not only generates biggish economic loss, but also the discharge of BOG to enterprise
Bring greenhouse effects ratio CO2Much bigger, BOG also will increase the pressure of storage container after being formed.When pressure reaches certain
When can also generate explosion dangerous situation.
Summary of the invention
The object of the present invention is to provide the dual-fuel engine combustion systems peculiar to vessel based on Temperature of Working control oil spout in cylinder
And method, fill up the blank of closed loop electronic control injection technology, by propose it is a kind of can be according to work in dual fuel engine cylinder peculiar to vessel
Matter state and crankshaft position information automatically adjust injection timing (SOI), and the closed loop electricity of distributive value is automatically adjusted according to speed of crankshaft
Control Injection strategy；For the waste of BOG cold energy and safety problem, the invention proposes a kind of BOG-EGR heat exchange subsystems, utilize
The gaseous mixture of the exhaust gas recirculatioon of BOG gas cooling (Exhaust Gas Recirculation, EGR) gas and air.
In order to achieve the above objectives, the present invention provides a kind of double fuel peculiar to vessel hairs based on Temperature of Working control oil spout in cylinder
Motivation combustion system comprising: it is the fuel injector that is arranged on the cylinder assembly of dual fuel engine peculiar to vessel, peculiar to vessel double for detecting
Temperature of Working sensor and crank position and revolution speed sensing in the cylinder of the cylinder assembly inner combustion chamber Temperature of Working of engine fuel
Device；The electric-controlled co-rail diesel fuel supply device being connect with fuel injector；Premixed natural gas feedway；BOG-EGR exchange heat subsystem and
Electronic control unit ECU；Temperature of Working sensor, crank position and speed probe, electric-controlled co-rail diesel oil supply in the fuel injector, cylinder
It is connected respectively with the electronic control unit ECU to device, premixed natural gas feedway and BOG-EGR heat exchange subsystem；It is described
Electronic control unit ECU controls electric-controlled co-rail diesel fuel supply device to the bavin that ignites of dual fuel engine peculiar to vessel supply certain pressure temperature
Oil, and control the premix that premixed natural gas feedway is supplied to dual fuel engine peculiar to vessel under certain natural gas/air ratio
Natural gas, and control BOG-EGR heat exchange subsystem and pass through the EGR gas after BOG gas cooling to dual fuel engine peculiar to vessel supply
The gaseous mixture of body and air, and according to the detection signal of Temperature of Working sensor in the cylinder and crank position and speed probe
Control the time for spraying of diesel pilot.
The above-mentioned dual-fuel engine combustion system peculiar to vessel based on Temperature of Working control oil spout in cylinder, wherein the electricity
Controlling co-rail diesel feedway includes sequentially connected diesel oil tank, the diesel pump with pressure-regulating device and diesel oil rail；It is described
Diesel oil rail is connect with the fuel injector, and is equipped with diesel oil rail pressure sensor；The diesel pump and diesel oil with pressure-regulating device
Rail pressure sensor is connected with the electronic control unit ECU respectively.
The above-mentioned dual-fuel engine combustion system peculiar to vessel based on Temperature of Working control oil spout in cylinder, wherein the bavin
Diesel fuel filter and diesel oil fuel consumption meter are successively arranged between oil tank and the diesel pump with pressure-regulating device.
The above-mentioned dual-fuel engine combustion system peculiar to vessel based on Temperature of Working control oil spout in cylinder, wherein described pre-
Mix natural air feed system include sequentially connected compressed natural gas (Compressed Natural Gas, CNG) storage tank, it is natural
Gas pressure-reduced and-regulated device, natural gas rail and natural gas injection module；The natural gas injection module and setting are in double fuel peculiar to vessel
Electronic throttle connection on engine charge pipeline, and be connected with the electronic control unit ECU；The natural gas rail is equipped with
The natural gas rail pressure sensor being connected with the electronic control unit ECU.
The above-mentioned dual-fuel engine combustion system peculiar to vessel based on Temperature of Working control oil spout in cylinder, wherein the CNG
Storage tank is equipped with the pressure sensor being connected with the electronic control unit ECU；The natural gas depressurization stable-pressure device and natural gas
Natural gas flowmeter is equipped between rail.
The above-mentioned dual-fuel engine combustion system peculiar to vessel based on Temperature of Working control oil spout in cylinder, wherein described
BOG-EGR heat exchange subsystem includes: LNG storage tank, the BOG storage tank that connect with LNG storage tank, heat exchanger, turbo charging installation and gives up
Gas by-passing valve；The cold side inlet of the heat exchanger is connect with BOG storage tank, and cold side outlet is connect with premixed natural gas feedway,
The connection of the air outlet slit of hot side inlet and turbo charging installation, hot end outlet and the electricity on dual fuel engine admission line peculiar to vessel
Sub- air throttle connection；The exhaust gas inlet of turbo charging installation is connect with dual fuel engine exhaust pipe peculiar to vessel；The by-passing valve
Be arranged between dual fuel engine exhaust pipe peculiar to vessel and the hot side inlet of the heat exchanger, and with the electronic control unit ECU
It is connected.
The above-mentioned dual-fuel engine combustion system peculiar to vessel based on Temperature of Working control oil spout in cylinder, wherein the LNG
Storage tank top is equipped with gas analyzer；BOG relief valve is equipped between the LNG storage tank and BOG storage tank；It the BOG storage tank and changes
BOG flow control valve is equipped between hot device；The gas analyzer, BOG relief valve and BOG flow control valve respectively with the electricity
Control unit ECU is connected.
The above-mentioned dual-fuel engine combustion system peculiar to vessel based on Temperature of Working control oil spout in cylinder, wherein the ship
The air inlet temperature/pressure sensor being connected with the electronic control unit ECU is equipped with dual fuel engine admission line.
The above-mentioned dual-fuel engine combustion system peculiar to vessel based on Temperature of Working control oil spout in cylinder, wherein the ship
The exhaust gas oxygen sensor being connected with the electronic control unit ECU is equipped with dual fuel engine exhaust pipe.
Started the present invention also provides a kind of based on the above-mentioned double fuel peculiar to vessel based on Temperature of Working control oil spout in cylinder
The injection timing automatic optimal control method of machine combustion system comprising following steps:
Step 1: dual fuel engine peculiar to vessel operation before, electronic control unit ECU according to the engine operating condition to be run into
Row system initialization；
Step 2.1: setting the fuel injector operating temperature under the operating condition；
Step 2.2: setting natural gas supply parameter, fuel feed pressure and electronic throttle aperture；
Step 2.3: setting exhaust gas bypass valve opening；
Step 2.4: after dual fuel engine starting peculiar to vessel, electronic control unit ECU is obtained by crank position and speed probe
The work information of operating point is taken, distributive value amendment is carried out；
Step 2.5: when cylinder assembly inner combustion chamber, Temperature of Working reaches fuel injector operating temperature, electronic control unit ECU control
Fuel injector processed responds movement, sprays the high pressure fuel of certain mass；
Step 2.6: if performance evaluation being carried out to the indices of dual fuel engine peculiar to vessel and is sprayed be unsatisfactory for requiring
Oily device operating temperature increases Δ T, and executes step 2.5；If meeting the requirements, 2.7 are thened follow the steps；
Step 2.7: setting the fuel injector operating temperature as the Best Injection Timing under the operating condition；
Step 2.8: recording the work information and stored.
Compared with the existing technology, the invention has the following advantages:
The invention proposes a kind of LNG ship double fuels based on Temperature of Working control oil spout in cylinder suitable for LNG ship
The fortune of dual fuel engine peculiar to vessel is greatly improved using the fuel feed system of double common rail structures in combustion system of engine
Row stability.
Dual-fuel engine combustion system peculiar to vessel provided by the present invention can operating condition according to engine and burning
Indoor working medium status information adjusts oil injection time to efficiency optimum point, realizes automatic optimal.For in cylinder kindling control and
Combustion stability has good regulating and controlling effect.
The present invention contains a set of BOG-EGR heat exchange subsystem simultaneously, and it is indoor which can monitor automatically the cabin LNG
Methane gas content, and it is equipped with BOG gas storage tank, the BOG gas stored is used to cool down the mixed of exhaust gas and fresh air
Gas is closed, and BOG flow can be automatically adjusted according to the flow of EGR, heat exchange efficiency can be increased substantially.BOG after heated simultaneously
Gas is pipelined to CNG storage tank and is used with total natural gas rail, and effective recycling of BOG gas is realized.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the dual-fuel engine combustion system peculiar to vessel of oil spout is controlled based on Temperature of Working in cylinder；
Fig. 2 is that the injection timing for the dual-fuel engine combustion system peculiar to vessel for controlling oil spout based on Temperature of Working in cylinder is automatic
Optimal-search control flow chart.
Specific embodiment
Below in conjunction with attached drawing, by specific embodiment, the invention will be further described, these embodiments are merely to illustrate
The present invention is not limiting the scope of the invention.
As shown in Figure 1, the present invention provides a kind of dual fuel engines peculiar to vessel based on Temperature of Working control oil spout in cylinder
Combustion system comprising: the electromagnetic valve type fuel injector 124 that is arranged on the cylinder assembly 127 of dual fuel engine peculiar to vessel is used for
Detect Temperature of Working sensor 125 and song in the cylinder of 127 inner combustion chamber's Temperature of Working of cylinder assembly of dual fuel engine peculiar to vessel
Shaft position and speed probe 126；The electric-controlled co-rail diesel fuel supply device being connect with electromagnetic valve type fuel injector 124；Premix is natural
Air feed system；BOG-EGR heat exchange subsystem and electronic control unit ECU129；Working medium temperature in the electromagnetic valve type fuel injector 124, cylinder
Spend sensor 125, crank position and speed probe 126, electric-controlled co-rail diesel fuel supply device, premixed natural gas feedway and
BOG-EGR heat exchange subsystem is connected with the electronic control unit ECU129 respectively；The electronic control unit ECU129 control is automatically controlled total
Rail diesel fuel supply device supplies the diesel pilot of certain pressure temperature to dual fuel engine peculiar to vessel, and controls premixed natural gas confession
The premixed natural gas under certain natural gas/air ratio is supplied to dual fuel engine peculiar to vessel to device, and controls BOG-EGR and changes
Thermal sub-system to dual fuel engine peculiar to vessel supply by the gaseous mixture of EGR gas and air after BOG gas cooling, and according to
The spray of the detection signal control diesel pilot of Temperature of Working sensor 125 and crank position and speed probe 126 in the cylinder
Penetrate the moment.
In order to realize that the closed-loop control of electronic control injection is sensed by covering Temperature of Working in one cylinder of installation in engine cylinder
Device 125 acts synergistically with crank position and speed probe 126, and the two uses "AND" logical construction, and one is all electronic control unit
ECU129 provides engine crankshaft position and rotary speed information and the indoor working medium status information of burning, when piston is in compressed line
Journey, when Temperature of Working reaches a certain set temperature in cylinder, electronic control unit ECU129 output action signal controls electromagnetic type oil spout
Device 124 makes action response.
Temperature of Working sensor 125 passes through built in cylinder head bore in a combustion chamber, to detect double fuel peculiar to vessel in cylinder of the present invention
Temperature in the cylinder assembly 127 of engine.Temperature of Working sensor 125 is used to monitor the temperature information of working medium in cylinder in cylinder, with
Discriminate whether that reaching diesel oil self-ignition point facilitates fuel-oil atmozation.It is related to be based on temperature scaling factor oil injection time, Ke Yizhi
It obtains and takes working medium physical and chemical state in cylinder, and carry out accurately Injection Control (Temperature of Working-oil spout in cylinder).
The electric-controlled co-rail diesel fuel supply device includes sequentially connected diesel oil (DIESEL) storage tank 123, band pressure adjusting
The diesel pump 119 and diesel oil rail 118 of device；The diesel oil rail 118 is connect with the electromagnetic valve type fuel injector 124, and is equipped with bavin
Oily rail pressure sensor 117；The diesel pump 119 with pressure-regulating device and diesel oil rail pressure sensor 117 respectively with the electricity
Control unit ECU129 is connected.It is successively arranged between the diesel oil tank 123 and the diesel pump 119 with pressure-regulating device
Diesel fuel filter 122 and diesel oil fuel consumption meter 121.
The premixed natural gas feedway includes sequentially connected compressed natural gas (Compressed Natural
Gas, CNG) storage tank 106, natural gas depressurization stable-pressure device 108, natural gas rail 111 and natural gas injection module 112；It is described natural
Gas jet module 112 is connect with the electronic throttle 113 being arranged on dual fuel engine admission line peculiar to vessel, and with the electricity
Control unit ECU129 is connected；Electronic throttle 113 is used to supply under the certain natural gas/air ratio of dual fuel engine peculiar to vessel
Premixed natural gas.The natural gas rail 111 is equipped with the natural gas rail pressure sensing being connected with the electronic control unit ECU129
Device 110.The CNG storage tank 106 is equipped with the pressure sensor 105 being connected with the electronic control unit ECU129；It is described natural
Natural gas flowmeter 109 is equipped between gas pressure-reduced and-regulated device 108 and natural gas rail 111.
The BOG-EGR heat exchange subsystem is dedicated to solving the cold energy use and its recycling and reusing of BOG, the BOG-EGR
BOG storage tank 104, the heat exchanger 114, turbo charging installation that heat exchange subsystem includes: LNG storage tank 101, connect with LNG storage tank 101
115 and exhaust gas by-pass valve 116；The cold side inlet of the heat exchanger 114 is connect with BOG storage tank 104, and cold side outlet and premix are natural
The CNG storage tank 106 of air feed system connects, and hot side inlet connect with the air outlet slit of turbo charging installation 115, hot end export and
Electronic throttle 113 on dual fuel engine admission line peculiar to vessel connects；The exhaust gas inlet of turbo charging installation 115 with it is peculiar to vessel
The connection of dual fuel engine exhaust pipe；The by-passing valve is arranged in dual fuel engine exhaust pipe peculiar to vessel and the heat exchanger
Between 114 hot side inlet, and it is connected with the electronic control unit ECU129.Heat exchanger 114 in BOG-EGR heat exchange subsystem
It is in order to replace original engine of boat and ship intercooler, for reducing intake air temperature (control intake air temperature).
BOG relief valve 103 is equipped between the LNG storage tank 101 and BOG storage tank 104；101 top of LNG storage tank is equipped with
Gas analyzer 102, when 101 top methane gas content of LNG storage tank is more than certain limit, electronic control unit ECU129 issues dynamic
It instructs, opens BOG relief valve 103, BOG flows into BOG storage tank 104 by pipeline；The BOG storage tank 104 and heat exchanger 114 it
Between be equipped with BOG flow control valve 107；The gas analyzer 102, BOG relief valve 103 and BOG flow control valve 107 respectively with
The electronic control unit ECU129 is connected.
When required EGR amount increases, electronic control unit ECU129 controls 116 aperture of exhaust gas by-pass valve and increases, at this time gaseous mixture
It is more than a certain setting value that temperature, which increases, and electronic control unit ECU129 is responded, and increases 107 aperture of BOG flow control valve, more
BOG accelerates the cooling to residual gas and fresh air gaseous mixture by heat-insulating pipeline inflow heat exchanger 114, after heating
BOG pass through pipeline flow into CNG storage tank 106.
The dual fuel engine admission line peculiar to vessel is equipped with the air inlet temperature being connected with the electronic control unit ECU129
Spend pressure sensor 128；The dual fuel engine exhaust pipe peculiar to vessel is equipped with to be connected with the electronic control unit ECU129
Exhaust gas oxygen sensor 120.
Embodiment according to the present invention, the fuel feed system of LNG ship dual fuel engine include electric-controlled co-rail bavin
Fluid supply apparatus and premixed natural gas feedway.Electric-controlled co-rail diesel fuel supply device, when engine is when given operating condition operates,
Diesel oil is delivered to diesel fuel filter 122 by diesel oil tank 123, and filtered diesel oil is through the diesel pump with pressure-regulating device
Enter diesel oil rail 118 after 119 pressurizations, electronic control unit ECU129 is sensed according to crank position and speed probe 126, diesel oil rail pressure
The signal that device 117, air inlet temperature/pressure sensor 128 are fed back controls the diesel pump 119 with pressure-regulating device and adjusts diesel oil rail
118 supply pressure, and then injection pressure and distributive value are controlled, the time for spraying of diesel pilot is by crank position and revolution speed sensing
125 Collaborative Control of Temperature of Working sensor in the cylinder that device 126 and engine cylinder cover, when engine is in compression stroke, temperature
When reaching optimum fuel evaporation and being atomized the temperature to form stratified mixtures, electronic control unit ECU129 output action signal control electricity
124 oil spout of magnetic valve type fuel injector, the temperature can be calculated by numerical value and be acquired, also can star automatic optimal and control to obtain.In advance
Natural air feed system is mixed, compressed natural gas flows out after buffering stable-pressure device pressure-reduced and-regulated from CNG storage tank 106, flows into natural
Gas rail 111 is equipped with natural gas flowmeter 109, natural gas rail 111 and natural gas between pressure-reduced and-regulated device and natural gas rail 111
Jet module 112 is connected, and electronic control unit ECU129 is according to engine speed and charge flow rate under different operating conditions to gas discharge
Calculating amendment is carried out, and natural gas is sprayed by air inlet pipe by natural gas injection module 112 and is mixed with the EGR/ air after cooling
It closes gas mixing and flows into cylinder through electronic throttle 113.
Embodiment according to the present invention, LNG ship dual-fuel engine combustion system include a set of BOG-EGR heat exchange
System.When gas analyzer 102 detects the methane gas too high levels in LNG storage tank 101, electronic control unit ECU129 is notified
BOG relief valve 103 is opened, BOG gas flows into BOG storage tank 104 by heat-insulating pipeline, and BOG storage tank 104 is used as terminal.Exhaust gas
By-passing valve 116 open when, air inlet temperature/pressure sensor 128 gives the temperature feedback of gaseous mixture to electronic control unit ECU129, when into
When temperature degree exceeds limit value, electronic control unit ECU129 controls BOG flow control valve 107 and opens, the BOG gas with certain cooling capacity
Body passes through heat-insulating pipeline inflow heat exchanger 114, and BOG flow control valve 107 can be adjusted automatically according to the aperture of exhaust gas by-pass valve 116
Valve opening is saved, to achieve the purpose that rapid cooling, the BOG gas after the heating of heat exchanger 114 flows into CNG storage tank by pipeline
106, for the use of natural gas rail 111.
As shown in Fig. 2, controlling the peculiar to vessel of oil spout based on Temperature of Working in cylinder based on above-mentioned the present invention also provides a kind of
The injection timing automatic optimal control method of dual-fuel engine combustion system comprising following steps:
Step 1, before dual fuel engine peculiar to vessel operation, the electronic control unit ECU129 operating condition to be run according to engine
Carry out system initialization
Step 2.1,124 operating temperature of fuel injector corresponding to automatic oil spout under the operating condition is set, when engine is transported
Row when Temperature of Working reaches 124 operating temperature of fuel injector in compression stroke cylinder, make by electronic control unit ECU129 control solenoid valve
Response action.
Step 2.2, natural gas supply parameter and 113 aperture of electronic throttle under different substitution ratio of NG are set, is led to
It crosses electronic control unit ECU129 and controls the fuel oil that the diesel pump 119 with pressure-regulating device conveys certain pressure to diesel oil rail 118.
Step 2.3, according to EGR amount needed for running under dual fuel engine declared working condition peculiar to vessel, pass through electronic control unit
ECU129 controls 116 aperture of exhaust gas by-pass valve.
Step 2.4, after dual fuel engine starting peculiar to vessel, electronic control unit ECU129 passes through crank position and speed probe
126 obtain the work information of operating point, carry out distributive value amendment.
Step 2.5, when dual fuel engine crankshaft peculiar to vessel is rotated to compression stroke, electronic control unit ECU129 passes through installation
Temperature of Working sensor 125 obtains working medium status information in the cylinder under compression stroke different moments in cylinder on cylinder cap, works as cylinder
When interior Temperature of Working reaches 124 operating temperature of fuel injector corresponding to default injection timing, electronic control unit ECU129 is received instead
Feedback, control electromagnetic valve type fuel injector 124 respond movement, spray the high pressure fuel of certain mass.
Step 2.6, according to the feedback information of each sensor and measured diesel consumption rate, gas consumption rate and each
Item discharge value (NOXDischarge, CO discharge, HC discharge) etc. parameters to the dynamic property, the feature of environmental protection, economy of dual fuel engine peculiar to vessel
And replacement of fuel rate carries out comprehensive analysis, the evaluation criterion of comprehensive analysis is that dynamic property is strong, specific fuel consumption is low, emission performance
Meet corresponding national standard, that is, meets emission regulation.When required standard is not achieved in the indices under the injection timing
When, electronic control unit ECU129 automatically adjusts 124 operating temperature of fuel injector corresponding to injection timing and increases Δ T, the injection timing
Under obtained indices continue comprehensive analysis, until indices are met the requirements.
Step 2.7, when indices of the dual fuel engine peculiar to vessel under a certain injection timing are met the requirements, setting should
Temperature of Working is next oil injection time default temperature in cylinder corresponding to injection timing.
Step 2.8, it records the work information and is stored.
In conclusion the present invention can be achieved: electronic control unit ECU can be according to the temperature of working medium in cylinder and the position of crank angle
Confidence breath adjusts oil injection time to efficiency optimum point, controls compression ignition for chemical reactivity developed in recent years
(RCCI) low temperature combustion mode has good booster action, and kindling in accurate cylinder may be implemented and control and then keep good combustion
Burn stability and engine power performance.The BOG-EGR heat exchange subsystem that the system is included, replaces original ship using heat exchanger
With engine intercooler, the efficient utilization of energy can be realized under the premise of not increasing economic cost.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of dual-fuel engine combustion system peculiar to vessel characterized by comprising the gas of dual fuel engine peculiar to vessel is arranged in
Fuel injector on cylinder component, the cylinder assembly inner combustion chamber Temperature of Working for detecting dual fuel engine peculiar to vessel cylinder in working medium
Temperature sensor and crank position and speed probe；The electric-controlled co-rail diesel fuel supply device being connect with fuel injector；Premix is natural
Air feed system；BOG-EGR heat exchange subsystem and electronic control unit ECU；Temperature of Working sensor, crankshaft in the fuel injector, cylinder
Position and speed probe, electric-controlled co-rail diesel fuel supply device, premixed natural gas feedway and BOG-EGR heat exchange subsystem point
It is not connected with the electronic control unit ECU；The electronic control unit ECU controls electric-controlled co-rail diesel fuel supply device to double fuel peculiar to vessel
Engine supplies the diesel pilot of certain pressure temperature, and controls premixed natural gas feedway and supply to dual fuel engine peculiar to vessel
The premixed natural gas under certain natural gas/air ratio is answered, and controls BOG-EGR heat exchange subsystem to dual fuel engine peculiar to vessel
The gaseous mixture by EGR gas and air after BOG gas cooling is supplied, and according to Temperature of Working sensor and song in the cylinder
The time for spraying of the detection signal control diesel pilot of shaft position and speed probe.
2. dual-fuel engine combustion system peculiar to vessel as described in claim 1, which is characterized in that the electric-controlled co-rail diesel oil supplies
It include sequentially connected diesel oil tank, the diesel pump with pressure-regulating device and diesel oil rail to device；The diesel oil rail with it is described
Fuel injector connection, and it is equipped with diesel oil rail pressure sensor；The diesel pump with pressure-regulating device and diesel oil rail pressure sensor point
It is not connected with the electronic control unit ECU.
3. dual-fuel engine combustion system peculiar to vessel as claimed in claim 2, which is characterized in that the diesel oil tank and described
Diesel fuel filter and diesel oil fuel consumption meter are successively arranged between diesel pump with pressure-regulating device.
4. dual-fuel engine combustion system peculiar to vessel as described in claim 1, which is characterized in that the premixed natural gas supply
Device includes sequentially connected CNG storage tank, natural gas depressurization stable-pressure device, natural gas rail and natural gas injection module；The day
Right gas jet module is connect with the electronic throttle being arranged on dual fuel engine admission line peculiar to vessel, and with the automatically controlled list
First ECU is connected；The natural gas rail is equipped with the natural gas rail pressure sensor being connected with the electronic control unit ECU.
5. dual-fuel engine combustion system peculiar to vessel as claimed in claim 4, which is characterized in that the CNG storage tank is equipped with
The pressure sensor being connected with the electronic control unit ECU；It is equipped between the natural gas depressurization stable-pressure device and natural gas rail
Natural gas flowmeter.
6. dual-fuel engine combustion system peculiar to vessel as described in claim 1, which is characterized in that BOG-EGR heat exchange
System includes: LNG storage tank, the BOG storage tank, heat exchanger, turbo charging installation and the exhaust gas by-pass valve that connect with LNG storage tank；It is described
The cold side inlet of heat exchanger is connect with BOG storage tank, and cold side outlet is connect with premixed natural gas feedway, hot side inlet and turbine
The air outlet slit of supercharging device connects, and hot end outlet is connect with the electronic throttle on dual fuel engine admission line peculiar to vessel；
The exhaust gas inlet of turbo charging installation is connect with dual fuel engine exhaust pipe peculiar to vessel；The by-passing valve setting is in double combustions peculiar to vessel
Expect between engine exhaust conduit and the hot side inlet of the heat exchanger, and is connected with the electronic control unit ECU.
7. dual-fuel engine combustion system peculiar to vessel as claimed in claim 6, which is characterized in that the LNG storage tank top is set
There is gas analyzer；BOG relief valve is equipped between the LNG storage tank and BOG storage tank；It is set between the BOG storage tank and heat exchanger
There is BOG flow control valve；The gas analyzer, BOG relief valve and BOG flow control valve respectively with the electronic control unit ECU
It is connected.
8. dual-fuel engine combustion system peculiar to vessel as described in claim 1, which is characterized in that the double fuel peculiar to vessel starts
Machine admission line is equipped with the air inlet temperature/pressure sensor being connected with the electronic control unit ECU.
9. dual-fuel engine combustion system peculiar to vessel as described in claim 1, which is characterized in that the double fuel peculiar to vessel starts
Machine exhaust pipe is equipped with the exhaust gas oxygen sensor being connected with the electronic control unit ECU.
10. a kind of injection timing automatic optimal control based on dual-fuel engine combustion system peculiar to vessel as claimed in claim 6
Method processed, which comprises the following steps:
Step 1: before dual fuel engine peculiar to vessel operation, electronic control unit ECU is according to the operating condition that engine to be run
System initialization；
Step 2.1: setting the fuel injector operating temperature under the operating condition；
Step 2.2: setting natural gas supply parameter, fuel feed pressure and electronic throttle aperture；
Step 2.3: setting exhaust gas bypass valve opening；
Step 2.4: after dual fuel engine starting peculiar to vessel, electronic control unit ECU obtains fortune by crank position and speed probe
The work information of row point, carries out distributive value amendment；
Step 2.5: when cylinder assembly inner combustion chamber, Temperature of Working reaches fuel injector operating temperature, electronic control unit ECU control spray
Oily device responds movement, sprays the high pressure fuel of certain mass；
Step 2.6: performance evaluation, if be unsatisfactory for requiring, fuel injector are carried out to the indices of dual fuel engine peculiar to vessel
Operating temperature increases Δ T, and executes step 2.5；If meeting the requirements, 2.7 are thened follow the steps；
Step 2.7: setting the fuel injector operating temperature as the Best Injection Timing under the operating condition；
Step 2.8: recording the work information and stored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910347233.1A CN109915266A (en) | 2019-04-26 | 2019-04-26 | A kind of dual-fuel engine combustion system peculiar to vessel and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910347233.1A CN109915266A (en) | 2019-04-26 | 2019-04-26 | A kind of dual-fuel engine combustion system peculiar to vessel and method |
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| CN109915266A true CN109915266A (en) | 2019-06-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502877A (en) * | 2020-11-23 | 2021-03-16 | 沪东重机有限公司 | Integrated pilot oil supply system for dual-fuel diesel engine and working method thereof |
| CN113623079A (en) * | 2021-06-16 | 2021-11-09 | 上海中船三井造船柴油机有限公司 | Control method for air-fuel ratio of low-pressure dual-fuel host for ship |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422972A (en) * | 2012-05-16 | 2013-12-04 | 气体技术发动机和设备有限公司 | Cooling system used for gas fuel engine |
| CN104121102A (en) * | 2014-07-23 | 2014-10-29 | 山东大学 | Fuel feeding system of micro diesel oil ignition direct-injection natural gas engine and control method thereof |
| CN104747285A (en) * | 2015-03-16 | 2015-07-01 | 济南大学 | Control system and method for cold starting and warm-up emission of direct injection natural gas engine |
| CN105114194A (en) * | 2015-08-17 | 2015-12-02 | 沈阳航空航天大学 | General airplane dual-fuel engine combustion system and method |
| US20160040583A1 (en) * | 2014-08-07 | 2016-02-11 | General Electric Company | Method and systems for adjusting flow resistance in an engine cooling system |
| JP2017002867A (en) * | 2015-06-12 | 2017-01-05 | いすゞ自動車株式会社 | Exhaust gas recirculation device for lng engine |
| JP2017002767A (en) * | 2015-06-08 | 2017-01-05 | トヨタ自動車株式会社 | EGR device |
| CN106979103A (en) * | 2017-06-02 | 2017-07-25 | 广西玉柴机器股份有限公司 | The gas handling system of LNG natural gas engines |
| FR3071014A3 (en) * | 2017-09-13 | 2019-03-15 | Fpt Industrial S.P.A. | VEHICLE SUPPLIED WITH LIQUEFIED NATURAL GAS |
| CN210217928U (en) * | 2019-04-26 | 2020-03-31 | 上海海事大学 | Marine dual-fuel engine combustion system |
-
2019
- 2019-04-26 CN CN201910347233.1A patent/CN109915266A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103422972A (en) * | 2012-05-16 | 2013-12-04 | 气体技术发动机和设备有限公司 | Cooling system used for gas fuel engine |
| CN104121102A (en) * | 2014-07-23 | 2014-10-29 | 山东大学 | Fuel feeding system of micro diesel oil ignition direct-injection natural gas engine and control method thereof |
| US20160040583A1 (en) * | 2014-08-07 | 2016-02-11 | General Electric Company | Method and systems for adjusting flow resistance in an engine cooling system |
| CN104747285A (en) * | 2015-03-16 | 2015-07-01 | 济南大学 | Control system and method for cold starting and warm-up emission of direct injection natural gas engine |
| JP2017002767A (en) * | 2015-06-08 | 2017-01-05 | トヨタ自動車株式会社 | EGR device |
| JP2017002867A (en) * | 2015-06-12 | 2017-01-05 | いすゞ自動車株式会社 | Exhaust gas recirculation device for lng engine |
| CN105114194A (en) * | 2015-08-17 | 2015-12-02 | 沈阳航空航天大学 | General airplane dual-fuel engine combustion system and method |
| CN106979103A (en) * | 2017-06-02 | 2017-07-25 | 广西玉柴机器股份有限公司 | The gas handling system of LNG natural gas engines |
| FR3071014A3 (en) * | 2017-09-13 | 2019-03-15 | Fpt Industrial S.P.A. | VEHICLE SUPPLIED WITH LIQUEFIED NATURAL GAS |
| CN210217928U (en) * | 2019-04-26 | 2020-03-31 | 上海海事大学 | Marine dual-fuel engine combustion system |
Non-Patent Citations (3)
| Title |
|---|
| 尹成彬;欧大生;张晓怀;周加东;: "船用共轨柴油机燃油喷射系统控制策略研究", 柴油机, no. 05, pages 21 - 26 * |
| 邓健星;: "WinGD船用低速发动机的技术发展", 广东造船, no. 02, pages 41 - 44 * |
| 默宁;李品友;高雅汉;: "船用双燃料发动机工作原理及排放控制", 黑龙江科技信息, no. 25, pages 148 - 149 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112502877A (en) * | 2020-11-23 | 2021-03-16 | 沪东重机有限公司 | Integrated pilot oil supply system for dual-fuel diesel engine and working method thereof |
| CN113623079A (en) * | 2021-06-16 | 2021-11-09 | 上海中船三井造船柴油机有限公司 | Control method for air-fuel ratio of low-pressure dual-fuel host for ship |
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