CN103016105B - Diesel engine particulate matter catcher regenerative burner and oil-injecting combustion-supporting compound regenerative system - Google Patents
Diesel engine particulate matter catcher regenerative burner and oil-injecting combustion-supporting compound regenerative system Download PDFInfo
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- CN103016105B CN103016105B CN201210541046.5A CN201210541046A CN103016105B CN 103016105 B CN103016105 B CN 103016105B CN 201210541046 A CN201210541046 A CN 201210541046A CN 103016105 B CN103016105 B CN 103016105B
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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
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Abstract
The invention discloses a diesel engine particulate matter catcher regenerative burner and an oil-injecting combustion-supporting compound regenerative system, aiming at providing a burner which can reliably fire under the full working condition of a diesel engine and a regenerative system. The burner comprises an internal barrel, an external barrel, an air inlet system, electric heat plug seats, a first-stage oil supply system, a second-stage oil supply system and a third-stage oil supply system, wherein the internal barrel is concentrically fixed in the external barrel by a support, two ends of the external barrel are air outlets, one end of the internal barrel is sealed, the other end of the internal barrel is opened and is opposite to the air outlets of the external barrel, and an internal chamber of the internal barrel is taken as a combustor; the air inlet system comprises a main air inlet pipe and a subsidiary air inlet pipe, the main air inlet pipe penetrates through the sealed end of the internal barrel to enter into the combustor, the part of the main air inlet pipe in the combustor is provided with a plurality of rows of air inlet holes, and the electric heat plug seats arranged at the upper parts of the first row of air inlet holes are internally provided with electric heat plugs; and the lower ends of the electric heat plug seats are communicated with the combustor, the lower ends of the electric heat plugs are provided with first-stage oil distributing silk screens, and an air outlet of the subsidiary air inlet pipe leads to the lower parts of the first-stage oil distributing silk screens.
Description
Technical field
The present invention relates to Fractions of Diesel Engine Exhaust Particulates thing pollution control technology field, particularly relate to the combustion-supporting composite regenerated system of a kind of diesel particulate trap regeneration igniter and oil spout.
Background technique
Along with the increase day by day of China's auto output and recoverable amount, automobile exhaust is to the harm of human health and also day by day serious to the pollution of environment.More and more stricter automobile emission regulation has all been formulated in countries in the world for this reason, the pollutant that rules limit is at present mainly hydrocarbon (HC), carbon monoxide (CO), nitrogen oxide (NOx) and particulate matter (PM), and what wherein diesel-oil vehicle needed priority control is nitrogen oxide (NOx) and particulate matter (PM).
For the processing of diesel engine for automobile exhaust particulate, the method that mainly adopts diesel particulate catcher (DPF) to filter, but filter after a period of time, need to remove the PM in DPF on time, also needed the regeneration of DPF.The regeneration of DPF wants delivery temperature to reach more than 600 ℃ conventionally, the PM being trapped on DPF could be burnt, but diesel-oil vehicle is generally all difficult to make delivery temperature reach this temperature in the middle of actual moving process, therefore, need to rely on that oil spout is combustion-supporting improves the point of ignition (being regeneration temperature) that delivery temperature reaches PM.
The combustion-supporting method of fuel oil is, at DPF entrance, regeneration igniter is set at present.
Mainly there is following technical problem in present stage regeneration igniter:
1, igniter ability to work is limited by engine operating condition, needs idling or fixedly under working condition, regenerates.Under Under Different Work Condition of Engine, extraction flow, delivery temperature and the fluctuation of exhaust oxygen content are larger, and igniting reliability, the heating efficiency of igniter are had to considerable influence.
2, regenerative system heating-up temperature is difficult to accurate control.Conventionally, oxidation catalyst (DOC) catalytic oxidation operating temperature requires more than 300 ℃, and simultaneous temperature is too high can accelerate DOC ageing of performance again; In DPF, the initiation temperature of exhaust particulate is at 600 ℃, and combustion temperature is too high equally also can scaling loss DPF.Therefore regenerative system requires to control each stage operating temperature along pipeline accurate stable, controls difficulty large.
3, igniter igniting reliability is poor.Igniter igniting is main to be relied on glow plug heating evaporation and lights diesel oil.Near oily vapour glow plug during igniting, oxygen concentration are inhomogeneous, shakiness is decided to be reliable ignition and brings great difficulty.Simultaneously long, the too high damage that is easy to again cause glow plug of local temperature current"on"time.
Summary of the invention
The object of the invention is for the technological deficiency existing in prior art, provide a kind of can be under the full working condition of diesel engine, the accurate igniter of temperature control, reliable ignition.
Another object of the present invention is to provide a kind of igniter combustion heating and the combustion-supporting composite regenerated system of composite regenerated oil spout is heated in DOC catalysis.
For realizing the technological scheme that object of the present invention adopts, be:
A kind of diesel particulate trap regeneration igniter, it is characterized in that, comprise interior bucket, outer barrel, gas handling system, electric heating obturating plug, one-level oil supply system, secondary oil supply system, three grades of oil supply systems, described interior bucket is fixed in outer barrel with one heart by supporting, the two ends of described outer barrel are respectively gas outlet, described interior bucket one end sealing, and the other end is opening shape relative with the gas outlet of described outer barrel, the inner chamber of described interior bucket is as firing chamber, described outer barrel with interior barrel between as exocoel; Described gas handling system comprises main suction tude and auxiliary inlet manifold, described main suction tude enters described firing chamber through one end of described interior bucket sealing, the part of described main suction tude in firing chamber is provided with many row's inlet holes, in the electric heating obturating plug on first row inlet hole top, glow plug is installed; The lower end of described electric heating obturating plug is communicated with described firing chamber, and the lower end of described glow plug is provided with one-level cloth silk noil net, and described one-level cloth silk noil portion off the net is led in the air outlet of described auxiliary inlet manifold; Described one-level oil supply system comprises one-level oil inlet pipe, and the oil outlet of described one-level oil inlet pipe is positioned at the online portion of described one-level cloth silk noil, and relative with the air outlet of described auxiliary inlet manifold; Described secondary oil supply system comprises secondary oil-gas separation chamber, secondary fuel evaporation chamber, the longitudinal fuel supply line of secondary, the horizontal fuel supply line of secondary, described secondary oil-gas separation chamber and secondary fuel evaporation chamber are respectively the annular closed cavity that is positioned at described bucket outer wall middle part, in described secondary oil-gas separation chamber, be provided be communicated with described firing chamber and with described main suction tude on the relative secondary air outlet hole of many row's inlet holes, described secondary fuel evaporation chamber is communicated with described secondary oil-gas separation chamber; The longitudinal oil inlet pipe of described secondary upper end is through described inner barrel and outer barrel, the other end of the longitudinal oil inlet pipe of described secondary is connected with the horizontal oil inlet pipe of described secondary, the horizontal oil inlet pipe of described secondary is horizontally installed in described secondary fuel evaporation chamber, on the horizontal oil inlet pipe of described secondary, be provided with a plurality of secondary oil outlets, secondary cloth silk noil net is installed in described secondary fuel evaporation chamber; Described three grades of oil supply systems comprise three grades of oil-gas separation chambers, three grades of fuel evaporation chambeies, three grades of longitudinal fuel supply lines, three grades of horizontal fuel supply lines, described three grades of oil-gas separation chambers and three grades of fuel evaporation chambeies are respectively the annular closed cavity that is positioned at described bucket outer wall middle part, in described three grades of oil-gas separation chambers, be provided with three grades of air outlet holes that are communicated with described exocoel, described three grades of fuel evaporation chambeies are communicated with described three grades of oil-gas separation chambers; Described three grades of longitudinal oil inlet pipe upper ends are through described inner barrel and outer barrel, the other end of described three grades of longitudinal oil inlet pipes is connected with described three grades of horizontal oil inlet pipes, described three grades of horizontal oil inlet pipes are horizontally installed in described three grades of fuel evaporation chambeies, on described three grades of horizontal oil inlet pipes, be provided with a plurality of three grades of oil outlets, three grades of cloth silk noil nets are installed in described three grades of fuel evaporation chambeies; Described secondary fuel evaporation chamber is adjacent with three grades of fuel evaporation chambeies, and described secondary oil-gas separation chamber and three grades of oil-gas separation chambers lay respectively at the two ends in the middle part of interior bucket.
Described electric heating obturating plug is through inner barrel and outer barrel, and upper end is fixed in described outer barrel.
Described secondary fuel evaporation chamber is communicated with described secondary oil-gas separation chamber by outlet passageway.
Described three grades of fuel evaporation chambeies are greater than described secondary fuel evaporation chamber.
A kind of combustion-supporting composite regenerated system of diesel particulate catcher oil spout that contains described regeneration igniter, comprise control system, regeneration igniter, oxidation catalyst, particulate matter trap, it is characterized in that, described regeneration igniter adopt exhaust full stream mode be series at engine exhaust pipe stage casing, be connected successively with described oxidation catalyst, particulate matter trap after described regeneration igniter; Described regeneration igniter is combined and is warmed up to regeneration temperature with described DOC.
The rear end of described regeneration igniter is provided with the first temperature transducer of monitoring flame temperature, the outlet of described regeneration igniter and described oxidation catalyst inlet are provided with the second temperature transducer of monitoring regeneration igniter outlet temperature, the outlet of described oxidation catalyst and described particulate matter trap inlet are provided with the three-temperature sensor of the temperature before particulate matter trap after monitoring oxidation catalyst, described particulate matter trap rear end is provided with the 4th temperature transducer of temperature after monitoring particulate matter trap, described the first temperature transducer, the second temperature transducer, three-temperature sensor, the 4th temperature transducer is connected with described control system respectively.
Compared with prior art, the invention has the beneficial effects as follows:
1, igniter of the present invention can be worked under the full working condition of diesel engine: under different working conditions, diesel exhaust gas flow and delivery temperature fluctuation are larger, easily cause igniter flame instability, even flame-out.Igniter of the present invention has independently air supply system, and adopt the design of multi-level separate chamber, igniter igniting, combustion heating carry out at relatively independent interior cavity combustion chamber, not only the normal combustion when diesel engine condition changes can be guaranteed, and maximum heating ability can also be guaranteed all the time by increasing fuel delivery, air demand; The evaporating cavity of the fuel evaporation vaporization of igniter in interior exocoel interlayer carries out, and relies on burning interior flame to heat, and therefore, fuel evaporation vaporization is controlled by igniter internal-combustion completely.
2, DOC and the precise control of DPF inside temperature during regenerative system of the present invention regeneration: DOC initiation temperature is more than 300 ℃, but that excess Temperature can aggravate DOC is aging; In DPF, the initiation temperature of PM is generally more than 600 ℃, same, and too high temperature also can cause DPF damage, and DPF inside temperature should be controlled at below 1000 ℃ conventionally.In the regenerative process of regenerative system of the present invention, igniter secondary firing heating DOC, according to temperature sensor monitors before and after DOC, regulates secondary fuel delivery, can stablize DOC bed temperature at 300-350 ℃.The main fuel-steam catalytic oxidation in DOC that relies on three grades of carburation by evaporations of igniter of the inner intensification of DPF, temperature before monitoring DPF, regulates three grades of fuel deliveries, can accurately control the front temperature of DPF at 600-650 ℃; When PM starts after regeneration, DPF is inner to heat up rapidly, now, by temperature and rate temperature change after monitoring DPF, regulate three grades of fuel feeding, reduce heating efficiency, both can guarantee the holomorphosis of the inner PM of DPF, the highest regeneration temperature in DPF can be controlled again, thereby DOC and DPF inside temperature can be accurately controlled.
3, igniter of the present invention igniting reliability improves: one-level ignition system quits work after light a fire successfully, stops that one-level fuel feeding stops, glow plug is powered, the shortening of glow plug operating time.And the air that auxiliary inlet manifold is introduced has reduced near oily vapour concentration glow plug, can guarantee one-level smooth ignition on the one hand, can effectively prevent glow plug area carbon on the other hand, extended glow plug working life, improved igniting reliability.
Accompanying drawing explanation
Figure 1 shows that the cut-away view of diesel particulate trap regeneration igniter of the present invention;
Figure 2 shows that the combustion-supporting composite regenerated system schematic of diesel particulate catcher of the present invention oil spout;
Dpf regeneration temperature profile when Fig. 3 is engine idling condition;
Dpf regeneration temperature profile when Fig. 4 is engine speed 1600rpm, moment of torsion 60NM;
Fig. 5 is that the speed of a motor vehicle is at 30km/h left and right, dpf regeneration temperature profile during half cargo condition.
In figure: 1. one-level fuel supply line, 2. secondary oil-gas separation chamber, 3. secondary fuel evaporation chamber, 4. the horizontal fuel supply line of secondary, 5. the longitudinal fuel supply line of secondary, 6. three grades of longitudinal fuel supply lines, 7. three grades of horizontal fuel supply lines, 8. three grades of fuel evaporation chambeies, 9. three grades of oil-gas separation chambers, 10. three grades of air outlet holes, 11. auxiliary inlet manifolds, 12. main suction tude, 13. exocoels, 14. electric heating obturating plugs, 15. secondary air outlet holes, 16. inlet holes, 17. firing chambers, 18. secondary oil outlets, 19. 3 grades of oil outlets, 20. outer barrels, 21. interior buckets, 22. engine exhaust pipe, 23. regeneration igniters, 24. oxidation catalyst (DOC), 25. particulate matter traps (DPF).
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The schematic diagram of a kind of diesel particulate trap regeneration of the present invention igniter as shown in Figure 1, comprise interior bucket 21, outer barrel 20, gas handling system, electric heating obturating plug 14, one-level oil supply system, secondary oil supply system, three grades of oil supply systems, described interior bucket 21 is fixed in outer barrel 20 with one heart by supporting, the two ends of described outer barrel 20 are respectively gas outlet, described interior bucket 21 one end sealings, the other end is opening shape relative with the gas outlet of described outer barrel, the inner chamber of described interior bucket 21 is as firing chamber 17, and firing chamber is the chamber of oil inflame.Between described outer barrel 20 and interior bucket 21, as exocoel 13, exocoel is mainly used to water conservancy diversion exhaust.Described gas handling system comprises main suction tude 12 and auxiliary auxiliary inlet manifold 11, main suction tude 12 outer ends connect air compressor, described main suction tude 12 enters described firing chamber 17 through one end of described interior bucket 21 sealings, the part of described main suction tude 12 in firing chamber 17 is provided with many row's inlet holes 16, in the electric heating obturating plug on 16 tops of inlet hole described in first row, glow plug is installed.The mounting type of the obturating plug of electric heating described in the present embodiment 14 is: described electric heating obturating plug 14 is through interior bucket 21 and outer barrel 20, and upper end is fixed in described outer barrel 20.At the inner car of described electric heating obturating plug, have internal thread, glow plug is fixed by screw thread and is sealed.The lower end of described glow plug (being also the lower end of electric heating obturating plug internal thread) is provided with one-level cloth silk noil net.The lower end of described electric heating obturating plug 14 is communicated with described firing chamber 17, and described cloth silk noil portion off the net is led in the air outlet of described auxiliary inlet manifold 11.The Main Function of glow plug is that heating one-level cloth silk noil net is guaranteed fuel evaporation before the igniting of one-level fuel feeding, and lights fuel-steam.For guarantee point pyrogene merit, the air that auxiliary inlet manifold is introduced has reduced near oily vapour concentration glow plug, can guarantee one-level smooth ignition on the one hand, can effectively prevent glow plug area carbon on the other hand, increases the service life.
Described one-level oil supply system comprises one-level oil inlet pipe 1, and the oil outlet of described one-level oil inlet pipe 1 is positioned at the online portion of described one-level cloth silk noil, and relative with the air outlet of described auxiliary inlet manifold 11.The fuel delivery of one-level oil supply system is less, and one-level oil inlet pipe is through to electric heating obturating plug, and oil outlet is facing to the air outlet of auxiliary inlet manifold.Fuel oil from the oil outlet of one-level oil inlet pipe 1 out along one-level cloth silk noil net dispersion train, under the heating of glow plug, evaporate, the air that fuel-steam and auxiliary inlet manifold are introduced mixes to be lighted by glow plug, the heat of burning has further strengthened the ability of fuel evaporation, by the combustion heating of self, one-level oil supply system can form continual and steady burning in the firing chamber of regeneration igniter.But one-level oil supply system fuel evaporation is limited in one's ability, oil mass increases will cause burn deterioration, and oily vapour can not fully react, and soot is heavier, and heating efficiency is not enough.Therefore, the Main Function of one-level oil supply system is: complete igniter igniting, and be the initial evaporation of the secondary oil supply system preparatory condition that catches fire.
Described secondary oil supply system comprises secondary oil-gas separation chamber 2, secondary fuel evaporation chamber 3, the longitudinal fuel supply line 5 of secondary, the horizontal fuel supply line 4 of secondary, described secondary oil-gas separation chamber 2 and secondary fuel evaporation chamber 3 are respectively the annular closed cavity that is positioned at described bucket 21 outer wall middle parts, in described secondary oil-gas separation chamber 2, be provided with and be communicated with described firing chamber 17 and the secondary air outlet hole 15 relative with inlet hole 16 in described main suction tude 13, described secondary fuel evaporation chamber 3 is communicated with described secondary oil-gas separation chamber 2.The longitudinal oil inlet pipe of described secondary 5 upper ends are connected with the nozzle of oil pump through described inner barrel and outer barrel, the other end of the longitudinal oil inlet pipe 5 of described secondary is connected with the horizontal oil inlet pipe 4 of described secondary, the horizontal oil inlet pipe 4 of described secondary is horizontally installed in described secondary fuel evaporation chamber 3, on the horizontal oil inlet pipe 4 of described secondary, be provided with a plurality of secondary oil outlets 18, secondary cloth silk noil net is installed in described secondary fuel evaporation chamber.Secondary oil supply system is the internally fired main oil supply system of regeneration igniter.At interior bucket middle part, around interior bucket outer wall, be processed with two airtight ring-type interlayers that space is very little, narrower interlayer is called secondary oil-gas separation chamber 2, and longer interlayer is called secondary fuel evaporation chamber 3.Secondary fuel evaporation chamber 3 front ends have four outlet passageways and secondary oil-gas separation chamber 2 to communicate, and have a plurality of secondary air outlet holes 15 to communicate with firing chamber 17 through inner barrel wall, and face many rows inlet hole 16 of main suction tude in secondary oil-gas separation chamber 2.The longitudinal fuel supply line 5 of secondary enters into 3 tops, secondary fuel evaporation chamber through outer barrel, and fuel oil flows down from the secondary oil outlet 18 of the horizontal fuel supply line downside of secondary fuel evaporation chamber 3 interior secondary, is evenly distributed on the outside of inner barrel wall along secondary cloth silk noil net.One-level flame constantly heats inner barrel wall in firing chamber, fuel oil in secondary fuel evaporation chamber 3 is evaporation rapidly under the heating of inner barrel wall, fuel-steam enters secondary oil-gas separation chamber 2 through outlet passageway, from the secondary air outlet hole 15 of secondary oil-gas separation chamber 2, enter firing chamber, the air that oily vapour and main suction tude are introduced fully mixes and is lighted burning by one-level flame.Secondary flame combustion is violent, and heating efficiency is strong, after one-level fuel cut-off, not only can guarantee conducting self-heating evaporation sustained combustion, can also maintain the heating evaporation of three grades of oil supply systems.The air importing from air compressor or limited, when secondary fuel delivery increases, air quantity deficiency causes that combustion reaction is insufficient, flame lengthens, temperature reduces, soot is heavier etc., so the Main Function of secondary oil supply system is to maintain self burning, for three grades of fuel evaporations provide heat energy.
Described three grades of oil supply systems comprise three grades of oil-gas separation chambers 9, three grades of fuel evaporation chambeies 8, three grades of longitudinal fuel supply lines 6, three grades of horizontal fuel supply lines 7, and described three grades of oil-gas separation chambers 9 and three grades of fuel evaporation chambeies 8 are respectively the annular closed cavity that is positioned at described bucket outer wall middle part.In described three grades of oil-gas separation chambers 9, be provided with three grades of air outlet holes 10 that are communicated with described exocoel 13, described three grades of fuel evaporation chambeies 8 are communicated with described three grades of oil-gas separation chambers 9.Described three grades of longitudinal oil inlet pipe 6 upper ends are through described inner barrel and outer barrel, the other end of described three grades of longitudinal oil inlet pipes 6 is connected with described three grades of horizontal oil inlet pipes 7, described three grades of horizontal oil inlet pipes 7 are horizontally installed in described three grades of fuel evaporation chambeies 8, on described three grades of horizontal oil inlet pipes 7, be provided with a plurality of three grades of oil outlets 19, three grades of cloth silk noil nets are installed in described three grades of fuel evaporation chambeies.Described secondary fuel evaporation chamber 3 is adjacent with three grades of fuel evaporation chambeies 8, and described secondary oil-gas separation chamber 2 and three grades of oil-gas separation chambers 9 lay respectively at the two ends in the middle part of interior bucket.The effect of three grades of oil supply systems is that heating DPF completes regeneration.In order to improve three grades of fuel evaporation abilities, three grades of fuel evaporation chambeies are longer than secondary fuel evaporation chamber, and heating evaporation surface area is larger.
Fuel oil flows down from three grades of oil outlets 19 of three grades of interior three grades of horizontal fuel supply line downsides in fuel evaporation chamber 8, is evenly distributed on the outside of inner barrel wall along three grades of cloth silk noil nets.Secondary flame constantly heats inner barrel wall in firing chamber, fuel oil in three grades of fuel evaporation chambeies 8 is evaporation rapidly under the heating of inner barrel wall, the three grade air outlet holes 10 of fuel-steam on three grades of oil-gas separation chambers enter igniter exocoel 13, and exhaust mixing, from the outlet of outer barrel, enter DOC.
The schematic diagram of the combustion-supporting composite regenerated system of diesel particulate catcher oil spout of the present invention as shown in Figure 2, comprises control system, regeneration igniter 23, oxidation catalyst (DOC) 24, particulate matter trap (DPF) 25.Shown in the regenerate structure of igniter 23 identical with the structure described in above-mentioned Fig. 1.Described regeneration igniter 23 adopt exhausts full stream mode be series at the stage casing of engine exhaust pipe 22, described regeneration igniter 23 is connected successively with described oxidation catalyst (DOC) 24, particulate matter trap (DPF) 25 below.Described regeneration igniter 23 is combined and is warmed up to regeneration temperature with described oxidation catalyst (DOC).Oxidation catalyst (DOC) 24 forms DOC+DPF packaging body with particulate matter trap (DPF) 25.
The front end of described regeneration igniter is provided with the first temperature transducer of monitoring flame temperature, described regeneration igniter outlet is provided with second temperature transducer of monitoring regeneration igniter outlet temperature with described oxidation catalyst (DOC) inlet, described DOC outlet and described DPF inlet are provided with the three-temperature sensor of the temperature before DPF after monitoring DOC, described DPF rear end is provided with the 4th temperature transducer of temperature after monitoring DPF, described the first temperature transducer, the second temperature transducer, three-temperature sensor, the 4th temperature transducer is connected with described control system respectively, detect respectively four temperature spotss.
Dpf regeneration process control divides two steps: 1. regeneration is prepared, and 2. regeneration temperature is controlled.
1. regeneration is prepared
When system judgement, DPF need to burn after regeneration, first according to engine operating condition, completes every regeneration preparatory work, comprises one-level igniting, heating secondary fuel evaporation chamber; Secondary catches fire, smooth combustion, three grades of fuel evaporation chambeies of heating; And the preparation of DOC catalytic condition etc.
For reaching DOC catalysis operating temperature, should guarantee that DOC bed temperature is over 300 ℃.By detecting the second temperature transducer of DOC front and back and the temperature of three-temperature sensor, can judge DOC bed temperature, as 300 ℃ of temperature less thaies, by two-stage stabilising, be heated; As temperature has reached DOC catalysis operating temperature, directly enter reproducer.
2. regeneration temperature control mode
After regeneration set-up procedure, secondary oil supply system continues for oil firing, and DOC is heated and reaches catalysis operating temperature, and system enters into the dpf regeneration stage.Three grades of oil supply systems start after fuel feeding, and fuel oil is through three grades of fuel evaporation chamber heating evaporations, and fuel-steam, through three grades of oil-gas separation chambers, enters exocoel from three grades of air outlet holes of interior bucket rear end, and exhaust mixing, and the outlet in outer barrel enters into DOC+DPF packaging body.Fuel-steam combustion heating DPF, makes DPF reach regeneration temperature.
1) regeneration target temperature
Regeneration temperature is to be determined by the initiation temperature of soot in DPF, and the soot initiation temperature that the fuel oil of different qualities generates is different.The soot initiation temperature that the common fuel oil that does not contain additive produces is at 630 ℃-650 ℃, and the soot initiation temperature that the fuel oil that contains additive produces is at 530-550 ℃.The target temperature of regeneration will be higher than the initiation temperature of soot, but can not be too high, in order to avoid DOC and DPF damage.
2) regeneration temperature control mode
During different operating mode, engine exhaust temperature and flow difference are very large, cause three grades of fuel-steam combustion reaction positions different, by three grades of different combustion manners of fuel-steam, regenerated way can be divided into three kinds.The distribution of engine exhaust flow, delivery temperature during according to different operating mode, is roughly divided into three regions by engine operating condition, and different regeneration mode of heatings is taked in different regions, and regeneration temperature control mode is also different.Respectively:
When 1. idling or low speed are unloaded, by igniter combustion heating, regenerated.
2. during the little load of low speed, composite regenerated by igniter combustion heating and DOC catalysis heating.
3. same except above-mentioned very little and condition range, under the most of operating mode of motor, by three grades of oil supply systems, through DOC catalytic reaction, complete regeneration.
3. regeneration temperature control procedure
The groundwork of regeneration temperature control procedure has three parts:
1) regeneration target temperature heating
According to engine operating condition, at three grades, start after fuel feeding, strengthen three grades of fuel feeding to default volume read-out, wait for and heating up.For evaporative type regeneration igniter, be subject to the impact of fuel evaporation time, response timely can not be made to the variation of fuel oil supply in temperature field, and change of temperature field lags behind the change of fuel delivery, shows larger inertia.Therefore when controlling regeneration temperature, the monitoring except to Temperature numerical, also will judge temperature changing trend (temperature curve variance ratio) in time.
Regeneration temperature calibration: for the different operating modes of motor, according to calculation and test, three grades of fuel deliveries have been preset, but default fuel delivery might not guarantee DPF to be heated to regeneration target temperature, therefore after DOC, temperature rises while approaching target temperature (Δ T<50 ℃), starts regeneration temperature calibration.According to the big or small direction of temperature curve variance ratio, increase and decrease in time fuel delivery, make DOC after temperature approach gently target temperature.
2) regeneration temperature keeps
Regeneration temperature keeps: reach after regeneration target temperature, when engine operating condition changes, dpf temperature also will change thereupon, according to the timely increase and decrease of the direction size fuel delivery of rate of temperature change, keeps the stable of regeneration temperature equally, prevents from significantly fluctuating.
When temperature surpasses regeneration target temperature fast, should reduce and even cut off three grades of fuel feeding, prevent DOC and the damage of DPF high temperature.
3) regeneration ending
For preventing that fuel oil from remaining in the secondary fuel evaporation chamber and three grades of fuel evaporation chambeies of regeneration igniter, after having regenerated, should stop successively three grades, secondary fuel feeding by the time, stop fuel pump, air compressor work.Record regenerating process data.
4, dpf regeneration test and interpretation of result
Adopt above-mentioned regenerative system and control mode, on test-bed and real vehicle, carried out respectively dpf regeneration test.The heating efficiency of checking regeneration igniter is also surveyed DPF inside temperature field.
(1) stand test
Test-bed motor is Beijing Automobile Workshop's Feitian BJ493ZQ3 diesel engine, and this motor is mainly equipped BeiQi FuTian Car Co., Ltd's Europe Marko's light truck.For the distribution situation of monitoring DPF inside temperature field, at DPF middle part, five temperature transducers are set, on radial cross section, press middle position Central Symmetry up and down and arrange.Dpf regeneration temperature curve when Fig. 3 is engine idling condition, dpf regeneration temperature curve when Fig. 4 is engine speed 1600rpm, moment of torsion 60NM.
Known through testing, complete regenerative process is greatly about 3 to 5 minutes, and the setup time of wherein regenerating needs 1 to 2 minute, from regeneration, is ready to complete and reaches regeneration target temperature and only need 1 minutes.Uniform distribution of temperature field in DPF in regenerative process, in DPF, radially section temperature difference is no more than 80 ℃; Regeneration temperature is controlled and is kept stable, there is no larger temperature fluctuation.
2, real train test
Test vehicle is BeiQi FuTian Car Co., Ltd's Europe Marko's light truck.Regeneration igniter and DOC+DPF packaging body are installed in vehicle exhaust pipeline to each Sensor monitoring temperature in record regenerating process.Fig. 5 is that the speed of a motor vehicle is at 30km/h left and right, dpf regeneration temperature curve during half cargo condition.
Through vehicle road test, DPF can reach regeneration temperature at short notice, and temperature is controlled steadily, under speed of a motor vehicle surging condition, still can guarantee that regeneration temperature is basicly stable.
3, conclusion
Through engine rig test and vehicle road test, can be as drawn a conclusion:
1) designed regeneration igniter, under the cooperation of DOC, can, in the larger operating range of motor, complete dpf regeneration well.
2) regeneration igniter heating efficiency is strong, and heating-up temperature is more even, DPF quick heating, uniform distribution of temperature field.
3) motor, after improving rotating speed increase load, is regenerated when regeneration igniter heating effect is better than idling; During real train test, in vehicle operating process, the heating time of regenerating, temperature are controlled and are all better than the idle regeneration that stops.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a diesel particulate trap regeneration igniter, it is characterized in that, comprise interior bucket, outer barrel, gas handling system, electric heating obturating plug, one-level oil supply system, secondary oil supply system, three grades of oil supply systems, described interior bucket is fixed in outer barrel with one heart by supporting, the two ends of described outer barrel are respectively gas outlet, described interior bucket one end sealing, and the other end is opening shape relative with the gas outlet of described outer barrel, the inner chamber of described interior bucket is as firing chamber, described outer barrel with interior barrel between as exocoel; Described gas handling system comprises main suction tude and auxiliary inlet manifold, described main suction tude enters described firing chamber through one end of described interior bucket sealing, the part of described main suction tude in firing chamber is provided with many row's inlet holes, in the electric heating obturating plug on first row inlet hole top, glow plug is installed; The lower end of described electric heating obturating plug is communicated with described firing chamber, and the lower end of described glow plug is provided with one-level cloth silk noil net, and described one-level cloth silk noil portion off the net is led in the air outlet of described auxiliary inlet manifold; Described one-level oil supply system comprises one-level oil inlet pipe, and the oil outlet of described one-level oil inlet pipe is positioned at the online portion of described one-level cloth silk noil, and relative with the air outlet of described auxiliary inlet manifold; Described secondary oil supply system comprises secondary oil-gas separation chamber, secondary fuel evaporation chamber, the longitudinal fuel supply line of secondary, the horizontal fuel supply line of secondary, described secondary oil-gas separation chamber and secondary fuel evaporation chamber are respectively the annular closed cavity that is positioned at described bucket outer wall middle part, in described secondary oil-gas separation chamber, be provided be communicated with described firing chamber and with described main suction tude on the relative secondary air outlet hole of many row's inlet holes, described secondary fuel evaporation chamber is communicated with described secondary oil-gas separation chamber; The longitudinal fuel supply line of described secondary upper end is through described inner barrel and outer barrel, the other end of the longitudinal fuel supply line of described secondary is connected with the horizontal fuel supply line of described secondary, the horizontal fuel supply line of described secondary is horizontally installed in described secondary fuel evaporation chamber, on the horizontal fuel supply line of described secondary, be provided with a plurality of secondary oil outlets, secondary cloth silk noil net is installed in described secondary fuel evaporation chamber; Described three grades of oil supply systems comprise three grades of oil-gas separation chambers, three grades of fuel evaporation chambeies, three grades of longitudinal fuel supply lines, three grades of horizontal fuel supply lines, described three grades of oil-gas separation chambers and three grades of fuel evaporation chambeies are respectively the annular closed cavity that is positioned at described bucket outer wall middle part, in described three grades of oil-gas separation chambers, be provided with three grades of air outlet holes that are communicated with described exocoel, described three grades of fuel evaporation chambeies are communicated with described three grades of oil-gas separation chambers; Described three grades of longitudinal fuel supply line upper ends are through described inner barrel and outer barrel, the other end of described three grades of longitudinal fuel supply lines is connected with described three grades of horizontal fuel supply lines, described three grades of horizontal fuel supply lines are horizontally installed in described three grades of fuel evaporation chambeies, on described three grades of horizontal fuel supply lines, be provided with a plurality of three grades of oil outlets, three grades of cloth silk noil nets are installed in described three grades of fuel evaporation chambeies; Described secondary fuel evaporation chamber is adjacent with three grades of fuel evaporation chambeies, and described secondary oil-gas separation chamber and three grades of oil-gas separation chambers lay respectively at the two ends in the middle part of interior bucket.
2. diesel particulate trap regeneration igniter according to claim 1, is characterized in that, described electric heating obturating plug is through inner barrel and outer barrel, and upper end is fixed in described outer barrel.
3. diesel particulate trap regeneration igniter according to claim 1, is characterized in that, described secondary fuel evaporation chamber is communicated with described secondary oil-gas separation chamber by outlet passageway.
4. diesel particulate trap regeneration igniter according to claim 1, is characterized in that, described three grades of fuel evaporation chambeies are greater than described secondary fuel evaporation chamber.
5. the combustion-supporting composite regenerated system of diesel particulate catcher oil spout that contains the igniter of regenerating described in claim 1, comprise control system, regeneration igniter, oxidation catalyst, particulate matter trap, it is characterized in that, described regeneration igniter adopt exhaust full stream mode be series at engine exhaust pipe stage casing, be connected successively with described oxidation catalyst, particulate matter trap after described regeneration igniter; Described regeneration igniter is combined and is warmed up to regeneration temperature with described DOC.
6. the combustion-supporting composite regenerated system of diesel particulate catcher according to claim 5 oil spout, it is characterized in that, the rear end of described regeneration igniter is provided with the first temperature transducer of monitoring flame temperature, the outlet of described regeneration igniter and described oxidation catalyst inlet are provided with the second temperature transducer of monitoring regeneration igniter outlet temperature, the outlet of described oxidation catalyst and described particulate matter trap inlet are provided with the three-temperature sensor of the temperature before particulate matter trap after monitoring oxidation catalyst, described particulate matter trap rear end is provided with the 4th temperature transducer of temperature after monitoring particulate matter trap, described the first temperature transducer, the second temperature transducer, three-temperature sensor, the 4th temperature transducer is connected with described control system respectively.
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| CN201210541046.5A CN103016105B (en) | 2012-12-12 | 2012-12-12 | Diesel engine particulate matter catcher regenerative burner and oil-injecting combustion-supporting compound regenerative system |
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| CN201210541046.5A CN103016105B (en) | 2012-12-12 | 2012-12-12 | Diesel engine particulate matter catcher regenerative burner and oil-injecting combustion-supporting compound regenerative system |
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| CN103016105B true CN103016105B (en) | 2014-11-19 |
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| CN107064408A (en) * | 2016-12-23 | 2017-08-18 | 北京航空航天大学 | Combustion test equipment |
| TWI688706B (en) * | 2017-12-07 | 2020-03-21 | 國家中山科學研究院 | Combustion device structure |
| CN109958503A (en) * | 2019-04-06 | 2019-07-02 | 黄育新 | A kind of burner for dpf regeneration |
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| US20060283181A1 (en) * | 2005-06-15 | 2006-12-21 | Arvin Technologies, Inc. | Swirl-stabilized burner for thermal management of exhaust system and associated method |
| US8789363B2 (en) * | 2007-06-13 | 2014-07-29 | Faurecia Emissions Control Technologies, Usa, Llc | Emission abatement assembly having a mixing baffle and associated method |
| CN201250689Y (en) * | 2008-06-10 | 2009-06-03 | 黄峰 | Vent-pipe of secondary burning mixer of built-in chamber |
| WO2010022747A1 (en) * | 2008-08-26 | 2010-03-04 | Fev Motorentechnik Gmbh | Producing ageing gas for exhaust-gas aftertreatment systems |
| WO2010082308A1 (en) * | 2009-01-13 | 2010-07-22 | トヨタ自動車株式会社 | Internal combustion engine exhaust cleaning device |
| KR100929611B1 (en) * | 2009-06-19 | 2009-12-03 | (주)템스 | A burner for diesel particulate filter regeneration |
| US8209971B2 (en) * | 2010-02-18 | 2012-07-03 | Nett Technologies Inc. | Burner for heating a stream of gas |
| KR101292338B1 (en) * | 2010-10-14 | 2013-08-07 | (주) 세라컴 | Combustion Method of Burner Apparatus For Purifying Exhaust Emissions of Diesel Engine using Liquefied Fuel and Burner Apparatus using the Method |
| CN102080587B (en) * | 2011-01-20 | 2013-01-30 | 中国人民解放军军事交通学院 | Regenerating unit and method of diesel particle trap |
| CN202031685U (en) * | 2011-01-20 | 2011-11-09 | 中国人民解放军军事交通学院 | Combustor of regenerating device of diesel engine particle trap |
| CN203081540U (en) * | 2012-12-12 | 2013-07-24 | 中国人民解放军军事交通学院 | Diesel engine particulate matter collector regeneration burner and oil injection combustion-supporting combined regeneration system |
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