CN105114193B - A kind of Methanol/Diesel Dual Fuel diesel engine fuel oil supply method - Google Patents
A kind of Methanol/Diesel Dual Fuel diesel engine fuel oil supply method Download PDFInfo
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- CN105114193B CN105114193B CN201510461202.0A CN201510461202A CN105114193B CN 105114193 B CN105114193 B CN 105114193B CN 201510461202 A CN201510461202 A CN 201510461202A CN 105114193 B CN105114193 B CN 105114193B
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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
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Abstract
A kind of Methanol/Diesel Dual Fuel diesel fuel supply method is to pass through the electronic control unit ECU combustion mode that methanol premixed gas is diesel oil ignited by methanol fuel feed system and diesel fuel feed system, realizes dual-fuel diesel engine fuel delivery.The present invention can make full use of the property of different fuel by increasing the oil supply system of second set of in-cylinder direct-jet, injection strategy by changing two kinds of fuel realizes the control of the flow field characteristic of internal combustion oil of cylinder air Mixture, to reach the high-efficiency cleaning burning of engine real-time working condition.
Description
Technical field
The present invention relates to a kind of engine fuel feed systems, especially a kind of to use dual fuel engine fuel supply system
System.
Background technique
The fuel that conventional engines use is fossil fuel gasoline and diesel oil, but petroleum-based energy is increasingly in short supply, environmental pollution
It is on the rise, the exploitation and application of engine washing substitute fuel are extremely urgent.At present Aalcohols fuel, ethers fuel, natural gas,
The fuel such as F-T diesel oil and biodiesel have been acknowledged as the clean alternative fuel of engine.
About clean fuel replace petroleum-based energy it is many as the research of automotive fuel, achieve it is certain at
Effect.But there are certain problems when applying on the engine for a kind of simple substitute fuel, such as methanol and dimethyl ether
Low boiling point is easy evaporation in oil pipe or air intake duct and forms vapour lock, hinders the supply of fuel；Their gasification latent heat value is very high, hair
Motivation can further decrease air inlet and cylinder temperature in starting or light running, cause flame-out and operate unstable；Methanol is viscous
It spends low, lubricate oil transmitting pump of diesel engine and plunger cannot well, abrasion is very fast；In terms of discharge, due to engine operating condition
Complexity does not grasp the combustion characteristics of fuel combination well, causes the discharge of Part load to increase, combustion instability removes
The development that the essence of the property of clean fuel itself, gasoline engine and diesel combustion mode Bu Tong also affects alternative fuel becomes
Gesture.Gasoline engine is limited by detonation, and the compression ratio much smaller than diesel engine determines that gasoline engine pre-mixing combustion is spread than diesel engine
The thermal efficiency of burning is much lower, although application of the alternative fuel in gasoline engine is mature, the lower thermal efficiency is unable to get very
Good solution, causes the utilization rate of alternative fuel not high, there is a variety of difficulties are urgently to be resolved.
In order to promote the utilization of engine washing substitute fuel, the concept of dual fuel engine is suggested, and is had certain
Progress.At present the fuel of dual-fuel diesel engine be formed with clean alternative fuel auxiliary fuel and diesel oil fuel combination into
Enter cylinder combustion, or is burnt by intake port injection substitute fuel, the diesel oil ignited substitute fuel premixed gas of in-cylinder direct-jet.
Both combustion systems are not required to carry out engine structure big change, easily operated, but fuel hybrid mode is to engine
Performance improvement effect it is limited, and Aalcohols fuel and diesel oil and immiscible；And in premixed gas pilot combustion mode, it is difficult
The control to premixed gas flow field characteristic in cylinder is realized by the change according to engine operating condition, and then is reached under this operating condition most
Good efficiency of combustion and low emission.
Summary of the invention
The invention solves concrete technical problems be the flow field characteristic for how controlling cylinder fuel air Mixture, be allowed to
With a kind of matched Methanol/Diesel Dual Fuel diesel engine fuel oil supply method of engine operation condition.
The above-mentioned concrete technical problems of the present invention are solved by technical solution below.
A kind of Methanol/Diesel Dual Fuel diesel engine fuel oil supply method, the method are by methanol fuel feed system
It is realized double with diesel fuel feed system by the electronic control unit ECU combustion mode that methanol premixed gas is diesel oil ignited
Fuel diesel engine fuel delivery；
The methanol fuel feed system is that methanol fuel is pumped the methanol fuel oil of methanol fuel tank by methanol fuel
Filter and pressure regulator are pumped into methanol fuel oil rail, and the rear methanol fuel injector by methanol fuel oil rail sprays into cylinder body and carries out
Work by combustion；
The diesel fuel feed system is that diesel fuel is pumped the diesel fuel oil of diesel tank by diesel fuel
Filter and pressure regulator are pumped into diesel fuel oil rail, and the rear diesel injector by diesel fuel oil rail sprays into cylinder body and carries out
Work by combustion；
The diesel oil ignited combustion mode of methanol premixed gas is that electronic control unit ECU is received from crank angle position
The signal that sensor, engine speed sensor and intake flow sensor are sent, and the matching analysis is carried out to its signal,
Provide methanol fuel the amount of injection, after send control signals to methanol fuel injector and diesel injector；At suction stroke initial stage, electricity
Sub-control unit ECU issues order control methanol fuel injector and carries out the cylinder injection of methanol, and forms the premixing of methanol in cylinder
Gas, in piston approaches top dead center, electronic control unit ECU to diesel injector issue order control diesel oil time for spraying and
Injection pulse width, subsequent diesel oil are compression-ignited in a combustion chamber and cause the multiple spot kindling of methanol premixed gas therein, i.e. realization first
The diesel oil ignited combustion mode of alcohol premixed gas；
The diesel oil ignited combustion mode is electronic control unit ECU close in piston by programming Control diesel injector
Start to spray diesel oil when top dead centre, then fuel injector starts to spray methanol, i.e., continues during diesel oil is compression-ignited into cylinder
Methanol is sprayed into, methanol evaporates mixing side in cylinder inner edge and is ignited；
In the above-mentioned technical solutions, the methanol fuel is antiknock gasoline, including alcohols, ethers, natural gas or
Gasoline；The diesel fuel is high-cetane fuel, including F-T diesel oil, biodiesel or diesel oil；The electronic control is single
First ECU sends fuel Injection Control signal to the fuel oil injector；The methanol fuel feed system and diesel fuel supply
Resistant material is independent from each other to system to constitute；The pressure regulator of the methanol fuel feed system is in control oil circuit
Fuel pressure, realize main fuel injection rate change.
A kind of Methanol/Diesel Dual Fuel diesel engine fuel oil supply method provided by the present invention is above-mentioned, with prior art phase
The beneficial effect of ratio is fuel oil supply system of this method by second set of in-cylinder direct-jet of increase, takes full advantage of different fuel
Property realizes the control of the flow field characteristic to internal combustion oil of cylinder air Mixture by changing injection strategy, starts to reach
The high-efficiency cleaning of machine real-time working condition burns.
Detailed description of the invention
Fig. 1 is fuel fuel oil supply system structural schematic diagram of the present invention.
Fig. 2 is methanol fuel fuel oil supply system structural schematic diagram of the present invention.
Fig. 3 is diesel fuel fuel oil supply system structural schematic diagram of the present invention.
In figure: 1: methanol fuel tank；2: methanol fuel pump；3: methanol fuel filter；4: cylinder body；5: methanol fuel injector；
6: inlet valve；7: diesel injector；8: diesel fuel pump；9: diesel fuel filter；10: diesel tank；11: flywheel；12:
Connecting rod；13: crankshaft；14: piston；15: pressure regulator；16: methanol fuel oil rail；17: low pressure pipe；18: diesel fuel is defeated
Oil pump；19: governor；20: draw rod positions sensor；21: diesel fuel injection pump；22: pressure limiting valve；23: high-pressure oil pipe；24:
Oil return pipe.
Specific embodiment
Specific embodiment of the invention is made further instructions below.
Implement a kind of Methanol/Diesel Dual Fuel diesel engine fuel oil supply method, is to solve how to control cylinder fuel sky
The flow field characteristic of gas gaseous mixture is allowed to and the matched concrete technical problems of engine operation condition.It solves proposed by the invention
The measure that particular problem is taken is that setting Methanol/Diesel Dual Fuel Fuel Feeding System for Diesel Engine first is united, and then passes through electronics
Control unit ECU control, realizes Methanol/Diesel Dual Fuel diesel engine fuel oil supply method, and specific technical solution is as follows.
A kind of Methanol/Diesel Dual Fuel diesel engine fuel oil supply method, this method are by methanol fuel feed system and bavin
Oil fuel feed system realizes double fuel by the electronic control unit ECU combustion mode that methanol premixed gas is diesel oil ignited
Diesel engine fuel oil supply.
Implementing methanol fuel feed system is that methanol fuel pump 2 fires the methanol fuel oil of methanol fuel tank 1 by methanol
Material filter 3 and pressure regulator 15 are pumped into methanol fuel oil rail 16, and the rear methanol fuel injector 5 by methanol fuel oil rail 16 sprays
Enter cylinder body 4 and carries out work by combustion.
Implementing diesel fuel feed system is that diesel fuel pump 8 fires the diesel fuel oil of diesel tank 10 by diesel oil
Material filter 9 and pressure regulator 15 are pumped into diesel fuel oil rail 16, and the rear diesel injector 7 by diesel fuel oil rail 16 sprays
Enter cylinder body 4 and carries out work by combustion.
Implementing the diesel oil ignited combustion mode of methanol premixed gas is that electronic control unit ECU is received from crank angle position
The signal that sensor, engine speed sensor and intake flow sensor are sent, and the matching analysis is carried out to its signal,
Provide methanol fuel the amount of injection, after send control signals to methanol fuel injector 5 and diesel injector 7；At suction stroke initial stage,
Electronic control unit ECU issues order control methanol fuel injector 5 and carries out the cylinder injection of methanol, and forms the premix of methanol in cylinder
Gas is closed, in piston approaches top dead center, electronic control unit ECU issues the injection of order control diesel oil to diesel injector [7]
Moment and injection pulse width, subsequent diesel oil are compression-ignited in a combustion chamber and cause the multiple spot kindling of methanol premixed gas therein, i.e.,
Realize the diesel oil ignited combustion mode of methanol premixed gas；
Implementing diesel oil ignited combustion mode is that electronic control unit ECU is connect by programming Control diesel injector 7 in piston
Start to spray diesel oil when nearly top dead centre, then fuel injector 5 starts to spray methanol, i.e., continues during diesel oil is compression-ignited to cylinder
Interior penetrating methanol, methanol evaporate mixing side in cylinder inner edge and are ignited；
In the above-described embodiment, used methanol fuel is antiknock gasoline, also includes alcohols, ethers, natural
Gas etc. or gasoline；Used diesel fuel is high-cetane fuel, also includes F-T diesel oil, biodiesel or diesel oil；
Used electronic control unit ECU is to send fuel Injection Control signal to the fuel oil injector；Used methanol
Fuel feed system and diesel fuel feed system are independent from each other resistant material composition；Used methanol fuel supply
The pressure regulator of system is to realize the change of main fuel injection rate by the fuel pressure in control oil circuit.
Specific embodiment of the invention is made further instructions with reference to the accompanying drawing.
It is to implement the present invention first as shown in Figure 1, implementing a kind of Methanol/Diesel Dual Fuel diesel engine fuel oil supply method
Methanol/Diesel Dual Fuel Fuel Feeding System for Diesel Engine system, which includes oil circuit, methanol fuel tank 1, methanol fuel oil
Pump 2, methanol fuel filter 3, methanol fuel injector 5, diesel fuel fuel tank 10, diesel fuel filter 9, diesel fuel oil pump 8,
Diesel injector 7 and electronic control unit ECU.
As shown in Fig. 2, methanol fuel feed system of the invention includes oil circuit, methanol fuel tank 1, methanol fuel oil
Pump 2, methanol fuel filter 3, methanol fuel injector 5, methanol fuel oil rail 16 and methanol fuel pressure regulator 15.
As shown in figure 3, diesel fuel feed system of the invention, comprising: diesel fuel fuel tank 10, diesel fuel filter
9, diesel injector 7, draw rod positions sensor 20, high-pressure oil pipe 23, low pressure pipe 17, oil return pipe 24, pressure limiting valve 22, diesel oil combustion
Expect oil transfer pump 18, diesel fuel injection pump 21 and governor 19.
Wherein: the oil circuit in methanol fuel feed system includes that oily rail 16 and fuel injector 5, one end of oily rail 16 and fuel oil are defeated
The other end of outlet connection, oily rail 16 is connect by fuel injector 5 with engine.
By taking Methanol/Diesel Dual Fuel Engine as an example but it is not limited only to this, the course of work of the invention is illustrated.With
Methanol is supplied as main fuel by main fuel oil supply system, and diesel oil is supplied as secondary fuel by secondary fuel oil supply system, can
To realize the diesel oil ignited similar combustion mode such as with diesel oil ignited methanol diffusion combustion of methanol premixed gas using the present invention.
In the diesel oil ignited combustion mode of methanol premixed gas, the course of work of this method is that electronic control unit ECU is received
The letter sent from sensors such as crank angle position sensor, engine speed sensor and intake flow sensors
Number, and the injection strategies such as the matching analysis, the amount of injection for making main fuel, time for spraying are carried out to it, associated control signal is sent out
It is sent on fuel injector 5 and 7, the injection of two kinds of fuel is accurately controlled；At suction stroke initial stage, electronic control unit ECU
The cylinder injection that order control main fuel fuel injector 5 carries out methanol is issued, is formed in cylinder using the hot environment in engine cylinder
The premixed gas of methanol, in piston approaches top dead center, electronic control unit ECU issues order control to secondary fuel oil sprayer 7
The time for spraying and injection pulse width of diesel oil, subsequent diesel oil are compression-ignited in a combustion chamber and cause the more of methanol premixed gas therein
Point kindling, that is, realize the diesel oil ignited combustion mode of methanol premixed gas.Such premix pilot combustion mode realized in cylinder
Compared with direct injection diesel in intake port injection methanol cylinder mode can preferably realize methanol mixed airflow field characteristic control, can be achieved
The higher thermal efficiency reduces NOXAnd soot emissions, but HC and CO discharge rising is more.
In diesel oil ignited methanol diffusion combustion mode, the course of work of this method is that electronic control unit ECU passes through programming
Control diesel injector 7 starts to spray diesel oil in piston approaches top dead center, and followed by, fuel injector 5 starts to spray methanol, i.e.,
Continue to spray into methanol into cylinder during diesel oil is compression-ignited, methanol evaporates mixing side in cylinder inner edge and is ignited.This burning mould
The relatively upper combustion mode of the thermal efficiency of formula it is low, but HC and CO discharge increasing degree it is smaller.
Aforementioned present invention year a kind of Methanol/Diesel Dual Fuel diesel engine fuel oil supply method for providing in, it is used double
The duel fuel injector fuel oil supply system of fuel can use in automobile engine, can also be in the large-scale diesel engine of engineering machinery
It uses.The oil pipe in methanol fuel feed system used in the method is made of resistant material, therefore first in this method
Alcohol fuel can be using fuel such as coal base alcohols, ethers；And diesel fuel be in addition to that can use conventional petrifaction diesel, it can be with
Using F-T diesel oil, the biodiesel made of andvegetable fats or waste grease etc. etc. for thering is DCL/Direct coal liquefaction to synthesize；Use this
The high-efficiency cleaning utilization that the dual fuel engine of method effectively can promote coal base substitute fuel etc., and reduce conventional engine
Discharge is of great importance to the energy-saving and emission-reduction for realizing internal combustion engine industry
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from this method design, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (1)
1. a kind of Methanol/Diesel Dual Fuel diesel engine fuel oil supply method, the method be by methanol fuel feed system with
Diesel fuel feed system realizes double combustions by the electronic control unit ECU combustion mode that methanol premixed gas is diesel oil ignited
Expect diesel engine fuel oil supply；
The methanol fuel feed system is that methanol fuel pump (2) fires the methanol fuel oil of methanol fuel tank (1) by methanol
Material filter (3) and pressure regulator (15) are pumped into methanol fuel oil rail (16), the rear methanol for passing through methanol fuel oil rail (16)
Fuel injector (5) sprays into cylinder body (4) and carries out work by combustion；
The diesel fuel feed system is that diesel fuel pump (8) fires the diesel fuel oil of diesel tank (10) by diesel oil
Material filter (9) and pressure regulator (15) are pumped into diesel fuel oil rail (16), the rear diesel oil for passing through diesel fuel oil rail (16)
Fuel injector (7) sprays into cylinder body (4) and carries out work by combustion；
The diesel oil ignited combustion mode of methanol premixed gas is that electronic control unit ECU is received from crank angle position sensing
The signal that device, engine speed sensor and intake flow sensor are sent, and the matching analysis is carried out to its signal, it provides
Methanol fuel the amount of injection, after send control signals to methanol fuel injector (5) and diesel injector (7)；At suction stroke initial stage,
Electronic control unit ECU issues order control methanol fuel injector (5) and carries out the cylinder injection of methanol, and forms the pre- of methanol in cylinder
Gaseous mixture, in piston approaches top dead center, electronic control unit ECU issues the spray of order control diesel oil to diesel injector (7)
It penetrates moment and injection pulse width, subsequent diesel oil is compression-ignited in a combustion chamber and causes the multiple spot kindling of methanol premixed gas therein,
Realize the diesel oil ignited combustion mode of methanol premixed gas；
The diesel oil ignited combustion mode is electronic control unit ECU close in piston by programming Control diesel injector (7)
Start to spray diesel oil when top dead centre, then fuel injector (5) starts to spray methanol, i.e., continues during diesel oil is compression-ignited to cylinder
Interior penetrating methanol, methanol evaporate mixing side in cylinder inner edge and are ignited；
The electronic control unit ECU sends fuel Injection Control signal to the fuel oil injector；
The pressure regulator of the methanol fuel feed system is the fuel pressure controlled in oil circuit, realizes methanol fuel injection speed
The change of rate；
The methanol fuel is natural gas；
The diesel fuel is biodiesel；
The methanol fuel feed system and diesel fuel feed system are independent from each other resistant material composition.
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| CN106968809A (en) * | 2017-04-27 | 2017-07-21 | 武汉科技大学 | A kind of method for controlling combustion of the double direct-injection internal combustion engines of double fuel |
| CN107677481A (en) * | 2017-10-17 | 2018-02-09 | 天津大学 | The device and method of soot development law in tactful cylinder is sprayed after test six-cylinder diesel engine |
| CN108035813A (en) * | 2017-11-28 | 2018-05-15 | 天津大学 | A kind of integrated injection system for accurately controlling the instantaneous mixing proportion of double fuel |
| CN110454289A (en) * | 2019-08-09 | 2019-11-15 | 天津大学 | A kind of diesel locomotive engine diesel oil methanol bifuel system and method |
| CN110529310B (en) * | 2019-09-24 | 2024-04-02 | 西华大学 | High-melting-point fatty acid methyl ester or ethyl ester oil supply system |
| CN112895919A (en) * | 2020-06-12 | 2021-06-04 | 太原理工大学 | Methanol range extender applied to electric automobile |
| CN112112729B (en) * | 2020-08-28 | 2021-10-12 | 江苏大学 | Variable air inlet tumble flow device of direct injection engine in dual-fuel cylinder |
| CN112459911A (en) * | 2020-11-26 | 2021-03-09 | 中船动力研究院有限公司 | Combustion method of double fuel machines |
| CN112796894A (en) * | 2020-12-21 | 2021-05-14 | 中国船舶重工集团公司第七一一研究所 | Dual-fuel system and method |
| CN113374575B (en) * | 2021-07-01 | 2024-02-02 | 太原理工大学 | Dual-fuel intelligent combustion system and control method thereof |
| CN114198214B (en) * | 2021-12-15 | 2024-05-10 | 北油电控燃油喷射系统(天津)有限公司 | Control method for injection system of interactive combustion-supporting dual-fuel internal combustion engine |
| US11773792B1 (en) | 2022-12-01 | 2023-10-03 | Caterpillar Inc. | Multi-fuel injection system and injector |
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