CN204299708U - The two gaseous fuel Spark ignition type burning of a kind of in-cylinder direct injection and control gear - Google Patents
The two gaseous fuel Spark ignition type burning of a kind of in-cylinder direct injection and control gear Download PDFInfo
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- CN204299708U CN204299708U CN201420659957.2U CN201420659957U CN204299708U CN 204299708 U CN204299708 U CN 204299708U CN 201420659957 U CN201420659957 U CN 201420659957U CN 204299708 U CN204299708 U CN 204299708U
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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
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model relates to the two gaseous fuel Spark ignition type burning of a kind of in-cylinder direct injection and control gear, double fuel storage tank in the utility model is connected with respective nozzle respectively through reduction valve, two kinds of fuel all adopt motor in-cylinder direct injection, so this model utility firing unit has all advantages of in-cylinder direct injection spark-ignition engine, described firing unit also eliminates the closure of conventional point combustion engine in addition, decrease the pumping loss in intake process, and be equipped with exhaust-gas turbocharger, charging efficiency can be improved, power per liter can be improved compared with the gaseous propellant engine sprayed with non-straight, in cylinder, a kind of fuel injector is near spark plug, coordinate with the special shape of piston, can near spark plug stroke localized rich district, ensure reliable ignition, another kind of fuel then forms rarer mixed gas with air, to realize the overall lean-burn of motor, reduce discharge, reduce consumption of petroleum, alleviate the pressure of oil shortage, alleviate environmental pollution.
Description
Technical field
The utility model relates to Vehicular internal combustion engine technical field, is specifically related to gas fuel engine and controls and inner cylinder direct injection motor.
Background technique
Along with the increase year by year of automobile pollution, the oil amount that automobile consumes also increases year by year.In addition verified world oil memory space constantly reduces, and the harmful gas pollution on the environment of discharging after automobile burning petroleum fuel is further serious and irreversible, so development of automobile is also more and more higher to energy-efficient requirement.Along with the aggravation of air pollution degree and the increasingly stringent of Abgasgesetz, for the engine replacing fuel of high-quality and imperative to the exploration of engine new combustion mode found by automobile.The Engine Alternative Fuel of high-quality can alleviate automobile to the petroleum resources pressure brought in short supply, alleviates energy crisis.The motor of new combustion pattern can reduce the consumption of motor fuel in theory, can reduce again the discharge of harmful matter, reaches the object reducing energy consumption and decreasing pollution simultaneously.Development of automobile must walk one with the Sustainable Development Road of energy environment harmonious coexistence.
In recent years, the gaseous propellant engine degree that receives publicity constantly increases, but traditional gaseous propellant engine has certain shortcoming, gaseous fuel enters in engine cylinder together with air, gaseous fuel accounts for a part for charge volume, and air inflow is reduced, and charging efficiency reduces; The net energy density of gaseous fuel is lower than petroleum fuel, and when making the power drop of motor cause lean-burn, power can not meet driving demand etc.Based on above-mentioned technical background and existing gaseous propellant engine Problems existing, the duel fuel engine that the utility model relates to overcomes the shortcoming of existing gaseous propellant engine, and multiple combustion mode can be realized, and by the conversion between different combustion mode, realize the burning of engine high-efficiency rate low emission.
In-cylinder direct injection technology, refer to and oil nozzle is placed between inlet and exhaust valve, high pressure fuel is directly noted people firing chamber is smooth-going burns efficiently, a kind of technology being issued to reduction fuel consumption rate in the situation of guarantee Power output is achieved by the mode of homogenous combustion and stratified mixture combustion, especially the fuel consume under Smaller load is made to reduce, make tendency to detonate also greatly decline, a kind of technology that power character is but greatly improved simultaneously.At present, the combustion manner of in-cylinder direct fuel-injection engine mainly contains two kinds, and a kind of is the mode of stratified mixture combustion, and another kind is the mode of homogeneous combustion.At home, the combustion manner of in-cylinder direct fuel-injection engine is homogeneous charge combustion mode, this is because the requirement of stratified combustion mode to oil quality is higher, domestic oil product can not make it the work of long-time stable, and be difficult to the quality improving oil product at short notice, so domestic in-cylinder direct fuel-injection engine is adopt homogeneous charge combustion mode always.But homogeneous charge combustion mode is difficult to the lean-burn realizing motor, and then the raising of limiting engine Economy.
Summary of the invention
The utility model is the two gaseous fuel Spark ignition type firing unit of a kind of in-cylinder direct injection, and object is that the shortcoming that solution traditional gas engine fuel exists and domestic in-cylinder direct fuel-injection engine can not realize stratified mixture combustion and the unmanageable problem of products of combustion.The utility model can also make motor burn under larger air fuel ratio, works under higher compression ratio.By control system, make motor under different operating mode with different combustion mode work, make motor can corresponding optimum combustion mode under various operating mode, stable under optimization model, efficiently work.
Above-mentioned purpose of the present utility model is achieved through the following technical solutions, and makes by reference to the accompanying drawings and illustrating.
Consult shown in Fig. 1, the utility model is the two gaseous fuel layering burn device of a kind of in-cylinder direct injection, is made up of motor 1, exhaust-gas turbocharger 4, double fuel storage tank 2 and 3, three way catalytic converter 6, EGR valve 14, electric control device 5; Double fuel storage tank 2 is connected with 12 with respective nozzle 9 with 10 respectively through reduction valve 7 with 3, and two kinds of fuel all adopt the in-cylinder direct injection of motor, and exhaust-gas turbocharger 4 is connected with the exhaust manifold 13 of motor, carries out supercharging to the air inlet of motor; EGR valve 14 is connected with suction tude 15 with waste pipe 13, waste gas enters pressurized machine 4 with fresh air, electric control device 5 receives the various CRANK PULSES of motor, controls the device that on the oil sprayer 9 and 12 of duel fuel engine, spark plug 16, pressurized machine 4, EGR valve 14 and motor, other need be automatically controlled.
Motor is made up of gas handling system, vent systems, two gaskraftstoffzufuhranlage, cooling system, lubrication system, ignition system etc.Dual fuel supply system is made up of fuel reservoir tank 2 and 3, gas fuel pipe, gaseous fuel decompressor 7 and 10, high pressure air rail 17 and 18, gas fuel nozzle 9 and 12, gaseous fuel leakage warning device 20 and 21 etc., gaseous fuel storage tank 2,3 is connected with respective nozzle 9,12, and each nozzle is all direct to be sprayed into fuel in engine cylinder.Engine supercharger 4 is connected with waste pipe 15, carries out supercharging to the air inlet of motor.Egr system is connected with suction tude with waste pipe, makes tail gas enter pressurized machine with air.Electric control device 5 receives the various operating parameter signals of motor, specifically comprise: concentration signal, detonation signal, the double fuel temperature and pressure signal of oxygen in accelerator pedal position signal, engine rotational speed signal, crankshaft-position signal, camshaft-position signal, lubrication pressure force signal, lubricating oil temperature signal, cooling water temperature signal, intake temperature and pressure signal, waste gas, output terminal controls the device such as nozzle, spark plug, pressurized machine, EGR valve of duel fuel engine.Gaseous fuel in above-mentioned double fuel tank nonspecific two kinds of fuel, the velocity of propagation of flame of described gaseous fuel A (auxiliary fuel) is higher than fuel B (main fuel), ignition energy will lower than the ignition energy of fuel B, and the octane value of fuel A wants high simultaneously.Have the octane value of fuel B to want high to the major requirement of fuel B, and the net energy density of fuel B is relatively high.
The utility model, the two gas fuel combustion of a kind of in-cylinder direct injection and control gear, the motor in this device is spark-ignition engine.The purpose of this utility model is the stratified mixture combustion and the motor smooth combustion under larger air fuel ratio that realize motor, after achieving lean combustion in engine, the tendency to detonate of motor reduces, and can be further enhanced to make the Economy of motor by the appropriate compression ratio improving motor.The compression ratio of motor is designed to 12 by us, higher than the compression ratio of conventional gasoline machine, and the thermal efficiency of motor can be made to improve; Be worth mentioning in addition a bit, the utility model eliminates the closure of conventional point combustion engine, decreases the pumping loss of motor during sub load, improves charging efficiency.Domestic in-cylinder direct injection gasoline engine only has WOT under heavy load, and middle Smaller load closure does not have standard-sized sheet, therefore, there is restriction loss at middle Smaller load in motor, there is not restriction loss in the utility model, intake efficiency is greatly improved under all operating modes of motor.Engine dual-fuel all adopts in-cylinder direct injection, has all advantages of direct fuel-injection engine.Two direct-injection systems of motor are also through special design, and object makes a kind of oil sprayer of fuel near spark plug, and the special shape of fitting piston can form localized rich district near spark plug, to realize reliable igniting; Another kind of fuel can form rarer mixed gas with air, realizes the overall lean-burn of motor, and can realize the conversion of multiple combustion mode.Wherein the position of the nozzle of fuel A and spark plug coordinates and the nozzle location of fuel A and piston-shaped cooperation, air-flow guiding and wall is utilized to guide the mixed gas that fuel A and air are formed can form the mixed gas being easy to light near spark plug, namely near spark plug, form the localized rich mixed gas of fuel A and air, make it to be easy to light, and then light the mixed gas formed by fuel B and air, make motor smooth working.The control that special designing requirement is special, in the utility model, the inner cylinder direct injection of two kinds of fuel, also will coordinate the igniting of spark, so just occurred two time for spraying and a time of ignition, the control in these three moment is particularly important to the utility model.In order to control these three boundary conditionss well, a large amount of emulation that the utility model carries out for these three boundary conditionss, object is the cooperation finding out three moment the bests under different operating mode, under different operating modes, implement optimal control.And under each combustion mode, all do same emulation experiment, find out optimal control parameter, to realize the control to motor.In the utility model motor double fuel supply and dual-fuel in-cylinder direct injection motor can be made to realize the combustion mode of the corresponding optimum of operating mode therewith in different operating mode:
1, start and warming-up operating mode (A type combustion mode): traditional motor needs to the denseer mixed gas of motor when start operating performance, to start with making engine reliable, but the incomplete combustion of start operating performance mixed gas, motor fuel consumption and emission performance when start operating performance is made all to become deterioration, the utility model has the combustion mode corresponding with start operating performance and A type combustion mode when starting compared with conventional engines, concrete methods of realizing is: motor is used alone fuel A, start in intake stroke to supply fuel A in cylinder, make in cylinder, to form fuel A and the comparatively uniform mixed gas of air, in compression stroke latter stage again to in-cylinder injection fuel A, make it near spark plug, form the denseer mixed gas in local.Because the ignition energy of fuel A is low, flame propagation speed, combustion duration is short, motor can be made at short notice to realize starting, and complete the warming-up process of motor fast.When engine cooling water temperature reaches engine work temperature, add fuel B gradually, reduce the supply of fuel A simultaneously, ensure that total thermal discharge of fuel remains unchanged.The quality of the calorific value * fuel B of the quality+fuel B of the calorific value * fuel A of the total thermal discharge=fuel A of fuel.Increase the excess air coefficient of fuel according to the controling parameters simulated gradually, make motor idle running under larger air fuel ratio.
2, small load condition (the few Type B combustion mode of many A): the fuel stratification in the present invention has two kinds, the layering between the mixed gas that fuel A-air is formed and the mixed gas that fuel B-air is formed and the layering of fuel B and air.Emphasize that layering mentioned in literary composition does not have specified otherwise all to refer to the layering that fuel B and air are formed here.During Smaller load, motor is worked under layering lean mode, the nozzle of fuel B starts to spray in compression stroke and implements multi-injection, and multi-injection coordinates gas flow to form stratified mixtures, when close to compression top center, the nozzle of fuel A is opened, start burner oil A, form fuel A and the relatively dense mixed gas of air at spark plug place, spark plug sparking makes it to light, and then the weak mixture of fire fuel B and air formation, make normal working of engine.Due to the stratified mixture combustion of motor, again because the air layer near Engine Cylinder Wall reduces the heat transfer loss of motor, improve the thermal efficiency of motor.
3, high load working condition (few A many Type Bs combustion mode): during large load, according to the signal of engine throttle pedal, accelerator pedal signal increases last stable gradually, and motor needs larger torque to export.Along with the continuous increase of engine torque demand, fuel supply system progressively increases the large fuel B of net energy density, reduces the supply of fuel A simultaneously, meets the demand of engine torque with this.Specific implementation method is when meeting engine torque demand, fuel B just starts when air inlet starts to spray, increase injection pulse width and jet pressure make it to form evenly denseer mixed gas with air, and reduce the supply of fuel A gradually, to ensure that the air fuel ratio of mixed gas remains unchanged in the process.
4, anxious accelerating mode (many A many Type Bs combustion modes): when motor needs anxious acceleration, not only need large torque also to need high rotating speed.According to engine throttle pedal signal, the instantaneous increase of engine throttle pedal signal, now will meet the demand that motor increases sharply to torque and rotational speed, the mixed gas that supply engine burning cycle is short, i.e. power mixed gas.Specific implementation method is, the fuel A that the fuel B that engine fuel supply system supply engine net energy density is large also needs supply engine velocity of combustion fast, that implementation methods is the same at the intake stroke burner oil B of motor with large load, fuel injection pulsewidth is increased while realizing high-pressure injection, unlike compression close to spraying more fuel A during top dead center, make the burning cycle of mixed gas the shortest, the Driving Torque of motor and rotating speed are increased sharply, the urgency realizing motor is accelerated.
Accompanying drawing explanation
Fig. 1 is the two gas fuel combustion of in-cylinder direct injection and control gear integrated machine composition.
Fig. 2 is the two gas fuel combustion of in-cylinder direct injection and the cross-sectional figure of control gear cylinder cap.
Fig. 3 is the signal that the two gas fuel combustion of in-cylinder direct injection and control gear electronic control power supply receive and the instruction sent.
Fig. 4 is that the two gas fuel combustion of in-cylinder direct injection and control gear fuel spray schematic diagram.
Fig. 5 is the two gas fuel combustion of in-cylinder direct injection and control gear control flow chart.
In figure: 1 engine body, 2 fuel A holding vessels, 3 fuel B holding vessels, 4 exhaust-gas turbochargers, 5 electronic control units, 6 triple effect catalytic converters, 7 reduction valve, 8 pressure gauges, the nozzle of 9 fuel A, 10 reduction valve, 11 pressure gauges, the nozzle of 12 fuel B, 13 exhaust manifolds, 14EGR valve, 15 suction tude, 16 spark plugs, 17 fuel B high pressure air rails, 18 fuel A high pressure air rails, 19 storage batteries, 20 fuel A leakage warning devices, 21 fuel B leakage warning devices
Embodiment
Embodiment of the present utility model is further illustrated below in conjunction with accompanying drawing illustrated embodiment.
Fig. 1 is the two gaseous fuel Spark ignition type burning of a kind of in-cylinder direct injection and control gear, is made up of the nozzle 12, exhaust manifold 13, EGR valve 14, suction tude 15, spark plug 16, fuel B high pressure air rail 17, fuel A high pressure air rail 18, storage battery 19, fuel A leakage warning device 20, fuel B leakage warning device 21 etc. of the nozzle 9 of engine body 1, fuel A holding vessel 2, fuel B holding vessel 3, exhaust-gas turbocharger 4, electronic control unit 5, triple effect catalytic converter 6, reduction valve 7, pressure gauge 8, fuel A, reduction valve 10, pressure gauge 11, fuel B.Gaseous fuel A is connected with the high pressure air rail 9 of fuel A through reduction valve 7, pressure gauge 8, high pressure air rail connects the nozzle of fuel A, fuel B is connected with the high pressure air rail 17 of fuel B through reduction valve 10, pressure gauge 11, and the high pressure air rail 17 of fuel B is connected with the nozzle 12 of fuel B.Two nozzles are all direct to be sprayed in engine cylinder by fuel, forms the fuel supply system of this invention.Fuel supply system also comprises the alarm 20,21 for fuel leakage.The exhaust manifold 13 of motor is connected with pressurized machine 4, carries out supercharging, and form the pressurization system of this device to the air inlet of motor.The outlet pipe 13 of EGR valve 14 connecting engine and suction tude 15, form the egr system of this device.Triple effect catalytic converter 6 is connected with engine exhaust manifold 13, is arranged on the rear of pressurized machine 4, processes motor exhaust, the after-treatment system of composition repacking.
Fig. 2 is the two gas fuel combustion of in-cylinder direct injection and the cross-sectional figure of control gear cylinder cap, can find out the position projection in the horizontal plane of the nozzle 9 of fuel A, the nozzle 12 of fuel B and spark plug 16, coordinate Fig. 4 can determine the spatial relation of three parts from figure.Can judge whether the mechanical strength of engine cylinder cover meets the demands accordingly by finite element analysis and theory calculate.
Fig. 3 is the electronic control unit signal transacting situation of motor, and receiving terminal receives engine operation condition signal: concentration signal, detonation signal, the double fuel temperature and pressure signal of oxygen in accelerator pedal position signal, engine rotational speed signal, corner signal, top dead center position signal, lubrication pressure force signal, lubricating oil temperature signal, cooling water temperature signal, intake temperature and pressure signal, waste gas.Output terminal is connected with fuel A nozzle 9, fuel B nozzle 12 and spark plug 16, sends instruction to final controlling element, realizes the arcing of dual-fuel injection and spark plug.
Fig. 4 is the two gas fuel combustion of in-cylinder direct injection and control gear, double fuel is made all to realize the inner cylinder direct injection of motor, to the oil sprayer of fuel A, B and spark plug position design, the nozzle 9 of fuel A becomes 35 degree of angles with cylinder-bore axis, the nozzle 12 of fuel B becomes 50 degree of angles with cylinder-bore axis, spark plug 16 becomes 25 degree of angles with cylinder-bore axis, and piston head has the pit of fit with nozzle, make fuel A can form the mixed gas that can light near spark plug, make fuel B can form stratified mixtures at Part load.This model utility is a kind of gas double fuel layering burn device, so eliminate the closure of conventional gasoline machine, compared with traditional layering lean-combustion engine, the restriction loss of motor is not only reduced when large load, the restriction loss of motor can be reduced at the full working scope of motor operation, increase air inflow, reduce motor heat transfer loss, the fuel economy of motor is further improved.Under can being operated in larger compression ratio after achieving lean combustion in engine, so the compression ratio of this motor is designed to 12, improve further again to make the thermal efficiency of motor.
If Fig. 5 is the two gas fuel combustion of in-cylinder direct injection and control gear control flow chart, the operating parameters (mainly accelerator pedal position signal) that first engine running will receive according to Engine ECU judges the operation mode of motor, different operation modes according to motor carry out different control to motor, select the combustion mode of motor, ensure that motor obtains real-time control.Ensure that engine torque output value meets torque-demand, and then make motor realize real-time relative optimal control, make the Economy of motor, power character, emission performance all reach relatively excellent.The corresponding arteries and veins spectrum emulated accordingly of each Operation Conditions of motor, finds and the immediate controling parameters of motor current operating state, and then controls motor from arteries and veins spectrum.Concrete implementation route: the operating parameters of motor judges the Operation Conditions of motor---combustion mode corresponding with operating mode---is to the relative optimal control of this combustion mode.
Claims (4)
1. the two gaseous fuel Spark ignition type burning of in-cylinder direct injection and control gear, it is characterized in that, it is made up of motor (1), exhaust-gas turbocharger (4), double fuel storage tank (2,3) three way catalytic converter (6), EGR valve (14), electric control device (5); Double fuel storage tank (2,3) is connected with respective nozzle (9,12) respectively through reduction valve (7,10), two kinds of fuel all adopt the in-cylinder direct injection of motor, exhaust-gas turbocharger (4) is connected with the exhaust manifold (13) of motor, carries out supercharging to the air inlet of motor; EGR valve (14) is connected with suction tude (15) with waste pipe (13), waste gas enters pressurized machine (4) with fresh air, electric control device (5) receives the various CRANK PULSES of motor, control the device that on the oil sprayer (9,12) of duel fuel engine, spark plug (16), pressurized machine (4), EGR valve (14) and motor, other need be automatically controlled, this motor also eliminates the closure of conventional point combustion engine.
2. the two gaseous fuel Spark ignition type burning of a kind of in-cylinder direct injection according to claim 1 and control gear, it is characterized in that, two kinds of fuel all adopts the direct injection in cylinder, and by the adjustment of controling parameters to realize time for spraying, the time for spraying of fuel B, the time of ignition these three of fuel A time be engraved in cooperation under Under Different Work Condition of Engine.
3. the two gaseous fuel Spark ignition type burning of a kind of in-cylinder direct injection according to claim 1 and control gear, it is characterized in that, a kind of oil sprayer of fuel near spark plug, the special shape of fitting piston, localized rich district can be formed, to realize reliable igniting near spark plug; Another kind of fuel can form rarer mixed gas with air, realizes the overall lean-burn of motor, and can realize the conversion of multiple combustion mode.
4. the two gaseous fuel Spark ignition type burning of a kind of in-cylinder direct injection according to claim 1 and control gear, it is characterized in that, this motor is gas lean-combustion engine, and compression ratio is designed to 12, slightly higher than the compression ratio of conventional gasoline machine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420659957.2U CN204299708U (en) | 2014-11-04 | 2014-11-04 | The two gaseous fuel Spark ignition type burning of a kind of in-cylinder direct injection and control gear |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420659957.2U CN204299708U (en) | 2014-11-04 | 2014-11-04 | The two gaseous fuel Spark ignition type burning of a kind of in-cylinder direct injection and control gear |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454190A (en) * | 2014-11-04 | 2015-03-25 | 吉林大学 | Intra-cylinder direct injection double gas fuel ignition type combustion and control device |
| CN104989539A (en) * | 2015-07-13 | 2015-10-21 | 吉林大学 | Internal combustion engine for direct injection of double-gas fuel in cylinder under EGR condition and control method |
| CN111535922A (en) * | 2019-02-06 | 2020-08-14 | 曼恩能源方案有限公司 | Method for operating an engine in a gaseous fuel operating mode and engine |
-
2014
- 2014-11-04 CN CN201420659957.2U patent/CN204299708U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454190A (en) * | 2014-11-04 | 2015-03-25 | 吉林大学 | Intra-cylinder direct injection double gas fuel ignition type combustion and control device |
| CN104989539A (en) * | 2015-07-13 | 2015-10-21 | 吉林大学 | Internal combustion engine for direct injection of double-gas fuel in cylinder under EGR condition and control method |
| CN111535922A (en) * | 2019-02-06 | 2020-08-14 | 曼恩能源方案有限公司 | Method for operating an engine in a gaseous fuel operating mode and engine |
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Granted publication date: 20150429 Termination date: 20181104 |
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