CN1929895B - Emission abatement assembly and method of operating the same - Google Patents

Emission abatement assembly and method of operating the same Download PDF

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Publication number
CN1929895B
CN1929895B CN200580007276.1A CN200580007276A CN1929895B CN 1929895 B CN1929895 B CN 1929895B CN 200580007276 A CN200580007276 A CN 200580007276A CN 1929895 B CN1929895 B CN 1929895B
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China
Prior art keywords
fuel
engine
air
fired burners
filter
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Expired - Fee Related
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CN200580007276.1A
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Chinese (zh)
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CN1929895A (en
Inventor
默特·E·贝尔克曼
爱德华·C·金奈尔德
约翰·布赖恩·阿贝尔
斯蒂芬·保罗·戈尔德施密特
小塞缪尔·N·克兰
纳温·哈迪娅
约·约瑟夫·赫卡比
威廉·泰勒三世
威尔伯·H·克劳利
兰达尔·J·约翰逊
尼古拉斯·比尔克比
大卫·皮尔逊
绍亚·法尔
孔优根
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Arvin Technologies Inc
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Arvin Technologies Inc
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Priority claimed from US10/931,092 external-priority patent/US7628011B2/en
Priority claimed from US10/931,027 external-priority patent/US7685811B2/en
Priority claimed from US10/931,088 external-priority patent/US20050150376A1/en
Priority claimed from US10/931,009 external-priority patent/US8641411B2/en
Priority claimed from US10/931,026 external-priority patent/US20050150218A1/en
Priority claimed from US10/931,010 external-priority patent/US7581389B2/en
Priority claimed from US10/931,025 external-priority patent/US7908847B2/en
Priority claimed from US10/931,017 external-priority patent/US20050150215A1/en
Application filed by Arvin Technologies Inc filed Critical Arvin Technologies Inc
Priority claimed from PCT/US2005/000939 external-priority patent/WO2005070175A2/en
Publication of CN1929895A publication Critical patent/CN1929895A/en
Application granted granted Critical
Publication of CN1929895B publication Critical patent/CN1929895B/en
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Abstract

The invention discloses an emission abatement assembly which removes soot from engine emissions, including a particulate filter, a first fuel-fired burner located on the upstream of the particulate filter, and a control unit configured to control the fuel-fired burner. The control unit includes (i) a processor and (ii) a memory device electrically coupled to the processor. The memory device stores a plurality of instructions. When executed by the processing unit, the instructions allow the processor: to determine whether the engine is operated under a predetermined operation condition or not, and if the engine is operated under the predetermined operation condition, to operate the fuel-fired burner to regenerate the particulate filter. A method of operating an emission abatement assembly is also disclosed.

Description

Emission abatement assembly and method of operating thereof
Technical field
Present invention relates in general to diesel emission and reduce device.
Background technology
Undressed engine exhaust thing (for example diesel emissions) for example comprises various waste water such as NOx, hydrocarbon, carbon monoxide etc.In addition, the undressed emission of the internal combustion engine of certain particular type---such as diesel engine---also comprises granular carbon based substances or " jet-black (soot) ".The federal government rule increasingly stringent that relates to the jet-black discharge standard has promoted thus to the device of removing jet-black from emissions from engines and/or the demand of method.
The amount of soot that engine system discharges can be reduced by using such as filter or gatherer emissions such as (trap) minimizing device.In order to remove jet-black wherein, such filter or gatherer need regular regeneration.This filter or gatherer can be regenerated by using burner or the electric heater jet-black that is collected in the filter that burns.
Summary of the invention
According to an aspect of the present invention, a kind of emission reduces assembly, comprises a pair of fuel-fired burners.These two fuel-fired burners all are under the control of single control module.This fuel-fired burners can optionally be operated and regenerate particulate filters by this control module.
According to a further aspect in the invention, a kind of during filter regeneration the monitoring fuel-fired burners method comprise: determine the temperature of the heat that burner produces and the fuel quantity that is supplied to this burner based on this adjusting.Can use predetermined temperature range, and if temperature outside this predetermined temperature range then regulate the fuel quantity that is supplied to burner.The electronic controller that is configured to control by this way fuel-fired burners is also disclosed.Can obtain measured temperature by the serviceability temperature sensor.
According to a further aspect in the invention, a kind of control module that is used to control the operation of fuel-fired burners is disclosed.This control module comprises housing, and this housing has the air intake of offering towards the internal chamber of this housing.One air pump is positioned in the internal chamber of this housing and has the air intake of offering towards the internal chamber of control module housing.This air pump produces the air pressure that reduces in internal chamber, thereby is drawn into air in the housing and enters the inlet of pump.This air flows cool electronic controller and places the interior miscellaneous part of housing.In an exemplary embodiment, air pump is supplied to the combustion chamber of fuel-fired burners from the internal chamber suction air of housing and with this air, thereby promotes the operation of burner.A kind of correlation technique of air being sent to fuel-fired burners is also disclosed.
According to a further aspect in the invention, a kind of method that emission reduces the fuel-fired burners of assembly of operating is disclosed.This method comprises the fuel that reduces to the fuel-fired burners supply in response to detecting of burner shutdown request.The fuel supply of such minimizing continues the preset time section, after this time period, no longer to the burner fuel supplying.In the described herein exemplary embodiment, with the generation of spark, the two the supply of combustion air and atomizing air continues a time period behind fuel cut-off.After a time period,, but continue the supply atomizing air and keep spark to produce no longer to burner supply combustion air.After a time period, cut off the supply of atomizing air and stop spark producing.In the illustrative embodiments described herein, the supply that purifies air is supplied to fuel-fired burners basically continuously to reduce or even to stop the obstruction of the fuel inlet nozzle of burner.A kind of electronic controller that emission reduces the parts of assembly that is configured to control is by this way also disclosed.
According to a further aspect in the invention, a kind of monitoring is as the method for the engine performance of the function of soot accumulation in the particulate filter, and it comprises: determine the soot accumulation characteristic in the described filter; Analyze this characteristic; And if this characteristic shows predetermined engine performance situation then produces a rub-out signal.In an exemplary embodiment, the soot accumulation speed in the described filter can be monitored.The increase of the soot accumulation speed in the described filter (surpassing predetermined threshold) can show such as excessive engine condition with oil or jam/leaked fuel injector etc.At this a kind of electronic controller of monitor soot accumulation by this way that is configured to is disclosed also.
According to a further aspect in the invention, use smoke detectors to detect the fuel particle in the internal chamber of control module and/or the appearance of flue dust.If detect the appearance of fuel particle and/or flue dust, then control module can be closed, avoid destruction thus potentially to control module.A kind of method of monitoring the output of such smoke detectors is also disclosed.
According to a further aspect in the invention, temperature sensor is used for monitoring the temperature of the inner chamber of control module.If this temperature then can be closed control module above predetermined last temperature limit, thereby avoid destruction potentially to control module.A kind of method of monitoring the output of such temperature sensor is also disclosed.
According to a further aspect in the invention, the use fuel pressure sensor is monitored the fuel pressure in the fuel return pipeline relevant with the petrolift of control module.If the fuel pressure in this return pipeline then can be closed control module above predetermined upper pressure limit, thereby avoid destruction potentially to control module.A kind of method of monitoring the output of such fuel pressure sensor is also disclosed.
According to a further aspect in the invention, the ash in a kind of monitor particles filter gathers the method for situation, comprising: determine the particle accumulation in the filter after filter regeneration; And surpass predetermined threshold value as fruit granule accumulation and then produce a rub-out signal.The particulate matter that is retained in after filter regeneration in the filter may be because the cause of ash.Equally, by the particle quality in (if not immediately) monitor filter relatively quickly after filter regeneration, can determine when filter need safeguard to remove dedust.A kind of electronic controller of monitor ash buildup by this way that is configured to is also disclosed.
According to a further aspect in the invention, the electronic controller of emission abatement assembly is electrically coupled to the control unit of engine of internal combustion engine.This electronic controller can be coupled to this control unit of engine via the communication interface such as controller local area network or " CAN " interface etc.In this way, information can be shared between the electronic controller of emission abatement assembly and control unit of engine.
According to a further aspect in the invention, a kind of method of operating fuel-fired burners comprises: the temperature in the exit of monitor particles filter in the filter regeneration cycle process; And if this filter outlet temperature surpasses described predetermined threshold then the operation of fuel metering burner.In one embodiment, if the filter outlet temperature surpasses described predetermined temperature limit, then fuel-fired burners is closed.Prior to the closing or replace closing of burner of burner,, then can reduce to be supplied to the fuel quantity of fuel-fired burners if the filter outlet temperature surpasses the predetermined temperature boundary.
According to a further aspect in the invention, a kind of method that begins the fuel-fired burners of emission abatement assembly comprises: promptly reduce the combustion rate of supply to burner in case detect igniting.This combustion rate remained on lower level when assembly preheated.In case preheat, fuel level is increased to predetermined operation fuel level.
According to a further aspect in the invention, the electrode of the fuel-fired burners predetermined amount of time of before fuel is introduced burner, switching on, thus remove jet-black or other residues that is deposited on the electrode.
According to a further aspect in the invention, the operating conditions of monitoring engine is so that airfree filter regeneration.In a specific embodiment, filter regeneration takes place when the power operation situation is in the preset range.
According to a further aspect in the invention, the waste gas stream that enters of the air inlet by fuel-fired burners is divided into the combustion flow of advancing by the combustion chamber and walks around streaming of combustion chamber.
According to a further aspect in the invention, the jet-black that is loaded in the particulate filter is monitored as the function of discharging mass flow.
According to a further aspect in the invention, provide a kind of method that emission abatement assembly is removed the jet-black in the waste gas of explosive motor of operating, said method comprising the steps of:
Determine whether engine is operated under predetermined operating conditions, and
If engine is operated under this predetermined operating conditions, then operate fuel-fired burners and come regenerate particulate filters.
According to a further aspect in the invention, provide a kind of emission abatement assembly that is used for removing from the waste gas of explosive motor jet-black, this assembly comprises:
Particulate filter,
Be positioned at the fuel-fired burners of this particulate filter upstream, and
Be configured to control the controller of this fuel-fired burners, this controller comprises (i) processor and the storage device that (ii) electrically is coupled to this processor, the a plurality of instructions of storage in this storage device, when carrying out by described processor, these instructions make described processor:
Determine whether engine is operated under predetermined operating conditions, and
If engine is operated under this predetermined operating conditions, then operate fuel-fired burners and come regenerate particulate filters.
Description of drawings
Fig. 1 is for having installed the rearview of the on-highway truck of emission abatement assembly on it;
Fig. 2 is one of them the stereogram that the jet-black of the emission abatement assembly of Fig. 1 reduces assembly;
Fig. 3 reduces the front view of the end of assembly from the jet-black that the direction of arrow of the line 3-3 of Fig. 2 is observed;
The jet-black of Fig. 2 that Fig. 4 is got for the line 4-4 along Fig. 3 that observes from the direction of arrow reduces the cutaway view of assembly;
Fig. 5 is the amplification view that the jet-black of Fig. 4 reduces the fuel-fired burners of assembly;
Fig. 6 is the stereogram of control module of the emission abatement assembly of Fig. 1, notes in order to clearly demonstrate lid being removed;
Fig. 7 is the side view of the control module of Fig. 6;
Fig. 8 is the diagram of the emission abatement assembly of Fig. 1;
Fig. 9 is the flow chart of the control program of the operation of the fuel-fired burners of monitoring emission abatement assembly in filter regeneration cycle;
Figure 10 is the exemplary temperature chart of mode of the control program of key diagram 9;
Figure 11 is the flow chart of the control program of monitor filter outlet temperature in filter regeneration cycle;
Figure 12 is the control program flow chart of monitoring as the engine performance of the function of the soot accumulation in the particulate filter of the emission abatement assembly of Fig. 1;
Figure 13 is the exemplary Δ P-time diagram of the mode of the control program of explanation Figure 12;
The flow chart of the control program that Figure 14 gathers for the ash in the particulate filter of emission abatement assembly of monitoring Fig. 1;
Figure 15 is the flow chart of control program of fuel-fired burners that is used to close the emission abatement assembly of Fig. 1;
Figure 16 is the exemplary fuel level-time diagram of the mode of the control program of explanation Figure 15;
Figure 17 is the flow chart of control program of fuel pressure that is used for monitoring the fuel return pipeline of control module;
Figure 18 is the flow chart that is used to monitor from the control program of the output of the smoke detectors of control module;
Figure 19 is the flow chart that is used to monitor from the control program of the output of the temperature sensor of control module;
Figure 20 is the diagram of another emission abatement assembly;
Figure 21 is the view that is similar to Figure 20, but the emission abatement assembly of the diesel oxidation catalyst that disposes the upstream that is positioned at filter base is shown;
Figure 22 and 23 the diagrams of fuel-fired burners for the assembly that illustrates in greater detail Figure 20 and 21;
Figure 24 is the stereogram of a part of combustion chamber that illustrates in greater detail the assembly of Figure 20 and Figure 21;
Figure 25 is the front view from the part of the combustion chamber that the direction of the arrow 25-25 of Figure 24 is observed;
Figure 26 is the front view of gas distributor;
Figure 27 is the view that is similar to Figure 22 and 23, but shows the different embodiments of combustion chamber;
Figure 28 is the front view of gas distributor;
Figure 29 is illustrated in the engine under the control of control unit of engine of engine and the diagram of emission abatement assembly;
Figure 30 is the flow chart of control program of fuel-fired burners that is used to begin the emission abatement assembly of Fig. 1;
Figure 31 is exemplary fuel level one time diagram of the mode of the control program of explanation Figure 30;
Figure 32 is the flow chart of control program that is used for the electrode of clean fuel combustion-type burner;
Figure 33 is used to regenerate the flow chart of control program of airfree fuel-fired burners;
Figure 34 is the flow chart that is used to trigger the control program of filter regeneration;
Figure 35 is the diagram of another emission abatement assembly;
Figure 36-43 is for to be similar to the view of Fig. 5, but shows the fuel-fired burners of revising to some extent;
Figure 44 is can be around the expanded view of the plate of combustion chamber location; And
Figure 45 is the part stereogram that the plate of the Figure 44 that locatees around the combustion chamber is shown.
The specific embodiment
As hereinafter in greater detail, the emission abatement assembly 10 that uses with internal combustion engine (such as the diesel engine of on-highway truck 12) comprises a pair of control jet-black minimizing assembly 14,16 down that is in control module 18.As shown in Figure 1, each has fuel-fired burners 20,22 and particulate filter 24,26 respectively in the jet-black minimizing assembly 14,16.Fuel-fired burners 20,22 is positioned at the upstream (with respect to engine efflux) of corresponding particulate filter 24,26.In engine operation process, waste gas flows through particulate filter 24,26 and jet-black is collected in this filter.The waste gas of handling is discharged into the atmosphere by flue gas leading 28,30.In engine operation process, control module 18 is optionally operated fuel-fired burners 20 often and is come regenerate particulate filters and fuel-fired burners 22 to come regenerate particulate filters 26.
Referring now to Fig. 2-5, illustrate in greater detail jet-black and reduce assembly 14.Should be appreciated that it is basic identical with jet-black minimizing assembly 16 that jet-black reduces assembly 14.Like this, also to reduce assembly 16 relevant with jet-black in the jet-black that relates to Fig. 2-5 discussion that reduces assembly 14.
As shown in Figure 5, the fuel-fired burners 20 that jet-black reduces assembly 14 comprises housing 32, and this housing 32 has the combustion chamber 34 that is positioned at wherein.Housing 32 comprises exhaust gas entrance 36.As shown in Figure 1, exhaust gas entrance 36 is fixed in T shape blast pipe 38, and this blast pipe 38 guides to jet-black with waste gas from the Diesel engine of truck 12 and reduces assembly 14,16.
Be limited with a plurality of gases in the combustion chamber 34 and enter opening 40.Engine exhaust can enter opening 40 flow into combustor 34 through this.In this way, the ignition flame that prevents in the combustion chamber 34 inside meets with whole engine efflux, allows controlled engine exhaust amount to enter combustion chamber 34 to provide oxygen to promote to be supplied to the burning of the fuel of burner 20 simultaneously.The waste gas that does not enter combustion chamber 34 is guided out the outlet 46 of housing 32 by being limited to a plurality of openings 42 in the cover cap 44.
Fuel-fired burners 20 comprises the electrode assemblie with pair of electrodes 48,50.As hereinafter more going through, electrode 48,50 is electrically coupled to the igniter of control module 18.When giving electrode 48,50 energisings, produce spark in the gap 52 between electrode 48,50.Fuel enters nozzle 54 by fuel and enters fuel-fired burners 20 and advance by gap 52 between the electrode 48,50, thus the spark ignition fuel that is produced by electrode 48,50.Should be appreciated that, enter the form of the normally controlled air/fuel mixture of the fuel of nozzle 54.
Fuel-fired burners 20 also comprises combustion air inlet 56.As hereinafter discussed in detail, the air pump that is associated with control module 18 produces forced air stream, and this forced air is flowed through and is advanced to combustion air inlet 56 by air pipe line 58 (as Fig. 1).In the regenerative process of particulate filter 24, circulation of air is crossed combustion air inlet 56 and is incorporated into fuel-fired burners 20, with thinking that the sustained combustion of fuel provides oxygen (the oxygen that exists) in waste gas.
As Fig. 2 and shown in Figure 4, particulate filter 24 is positioned at outlet 46 downstreams (with respect to waste gas stream) of the housing 32 of fuel-fired burners 20.Particulate filter 24 comprises filter base 60.As shown in Figure 4, substrate 60 is positioned in the housing 62.Filter housings 62 is fixed in burner shell 32.Like this, the gas that leaves burner shell 32 is guided in the filter housing 62 and by substrate 60.Particulate filter 24 can be the commercially available particulate filter of any kind.For example, particulate filter 24 can be implemented as the exhaust gas particle filter such as " dark bed (deep bed) " or " wall-flow type " filter etc.Deep-bed filter can be implemented as metal mesh opening filter, metal or ceramic foam filter, ceramic fibre mesh filter etc.On the other hand, wall-flow filter can be cordierite or silicon carbide ceramics filter, and wherein this filter has the passage that replaces that is inserted in its front and rear, thereby forces gas to enter a passage by described wall, and comes out from another passage.In addition, filter base 60 can be injected with catalysis material, such as for example precious metal catalyst material.For example, catalysis material can be with platinum, rhodium, palladium, comprise that the similar catalysis material of its bond and any other realizes.Use catalysis material to reduce and light the required temperature of collected soot particles.
Filter housings 62 is fixed in the housing 64 of collector 66.Specifically, the import 68 of collector housing 64 is fixed in the outlet 88 of filter housings 62.Like this, the waste gas of treated (that is, process is filtered) disengaging filter base 60 (and breaking away from filter housings 62 thus) advances in the collector 66.Then, this treated waste gas advances in the blast pipe 28 and is discharged into atmosphere by gas vent 70 thus.Should be appreciated that if truck 12 is equipped with follow-up discharging to reduce device (not shown), then gas vent 70 can be coupled to the inlet pipeline of inlet (or be coupled to) of such device.
Referring now to Fig. 6-8, illustrate in greater detail control module 18.Control module 18 comprises housing 72, and this housing 72 defines internal chamber 112.A plurality of positioning parts that are associated with control module 18 are in the internal chamber 112 of housing 72.For convenience of explanation, thus lid 74 (see figure 1)s that will seal in Fig. 6 and Fig. 7 remove from housing exposes the parts the housing 72.Control module 18 comprises electronic control unit (ECU) or " electronic controller " 76.Electronic controller 76 is positioned in the internal chamber 112 of housing 72.In fact, electronic controller 76 is to be responsible for the signal of telecommunication and the responsible master computer that activates the electronics controlled part that is associated with emission abatement assembly 10 that decipher is sent by the sensor that is associated with emission abatement assembly 10 (being engine 80 in some cases).For example, wherein, electronic controller 76 can be used for determining when jet-black reduces that one of particulate filter 24,26 of assembly 14,16 needs to regenerate, calculates and the quantity that control air that will introduce fuel-fired burners 20,22 and fuel and ratio, determine each position in the jet-black minimizing assembly 14,16 temperature, operate a plurality of air and communicate by letter with fuel valve and with the control unit of engine 78 of the engine 80 that is associated with truck 12.
For this reason, electronic controller 76 comprises a plurality of electronic units, and these electronic units are usually relevant with used electronic unit in the control of Mechatronic Systems.For example, outside other parts in being usually included in such device, electronic controller 76 can comprise that also read-only memory device wherein able to programme comprises can wipe PROM (EPROM or EEPROM) such as the processor of microprocessor 82 and such as the storage device 84 of read-only memory device able to programme (" PROM ").Wherein, storage device 84 is used to store for example instruction of software program (or a plurality of program) form, and when being carried out by processor 82, it makes the operation of electronic controller 76 control emission abatement assemblies 10.
Electronic controller 76 also comprises analog interface circuit 86.Analog interface circuit 86 will convert the signal of the input that is suitable for being presented in little reason device 82 from the output signal of each sensor (for example temperature sensor) to.Specifically, analog interface circuit 86 becomes the used data signal of microprocessor 82 by utilizing analog to digital (A/D) converter (not shown) or analog with the analog signal conversion that sensor produced.Should be appreciated that A/D converter can be implemented as discrete device or multiple arrangement, perhaps can be integrated in the microprocessor 82.Should be appreciated that, if with emission abatement assembly 10 sensor associated in any one or a plurality of generation digital output signal, then can get around analog interface circuit 86.
Similarly, analog interface circuit 86 is converted to the output signal that is suitable for being presented in the electric controlled part (for example fuel injector, air valve, igniter, pump motor etc.) that is associated with emission abatement assembly 10 with the signal of microprocessor 82.Specifically, the data signal that microprocessor 82 produced by the device that utilizes digital-to-analog (D/A) converter (not shown) and so on of analog interface circuit 86 converts the used analog signal of electronics controlled part that is associated with emission abatement assembly 10 to.Should be appreciated that be similar to above-mentioned A/D converter, D/A converter can be implemented as discrete device or multiple arrangement, perhaps can be integrated in the microprocessor 82.Should be appreciated that, if with electric controlled part that emission abatement assembly 10 is associated in any one or a plurality of analog input signal is operated, then can get around analog interface circuit 86.
Therefore, can operate the operation that electronic controller 76 is controlled fuel-fired burners 20 and 22.Specifically, the program that electronic controller 76 is carried out comprising closed loop control mode, in this pattern, the output of electronic controller 76 monitoring and emission abatement assembly 10 sensor associated is in order to the input of control to electric controlled part associated therewith.For this reason, electronic controller 76 and the sensor communication that is associated with emission abatement assembly reduce the temperature of each position in the assembly 14,16 and the pressure drop that strides across filter base 60 in order to determine jet-black wherein.Be equipped with this data, electronic controller 76 per seconds carry out many calculating, comprise the value in the table that searches pre-programmed, so that execution algorithm realizes such as following function, that is, how long determine operating fuel injected device when or operating fuel injected device, control to the power level input of electrode 48 and 50, control by combustion air inlet 56 air that advance etc.
Control module 18 also comprises air pump 90.Air pump 90 is driven by motor 92, and this motor 90 is under the control of electronic controller 76.Motor 92 drive pulley 94, pulley 94 drives air pump 90 again.Signal line 96 electrically is coupled to electronic controller 76 with air pump 90.The outlet 98 of air pump 90 is coupled to the inlet 100 that is subjected to electronically controlled air valve 102 via air pipe line 104.One of them is coupled to the combustion air inlet 56 of fuel-fired burners 20 via air pipe line 58 in first outlet 106 of air valve 102, and second outlet 108 of air valve 102 is coupled to the combustion air inlet 56 of fuel-fired burners 22 via another air pipe line 58.
Air valve 102 electrically is coupled to electronic controller 76 via signal line 110.Like this, the position of electronic controller 76 controllable valve 102.Specifically, electronic controller 76 can be positioned at air valve 102 first valve position or second valve position, at first valve position, combustion air guiding fuel-fired burners 20 from air pump 90, at second valve position, from the combustion air guiding fuel-fired burners 22 of air pump 90.As hereinafter in greater detail, controller 76 operate air valve 102 and fuel-fired burners 20,22 that the combustion air guiding is associated with the particulate filter 24,26 of regenerating.
Shown in Fig. 6 and 7, the inlet 114 of air pump 90 opens wide towards the internal chamber 112 of control housing 72.Thus, air pump 90 is from internal chamber 112 suction airs of control housing 72.Described control housing 72 has air intake 116.Air intake 116 opens wide towards inner chamber 112.Air cleaner 118 is fixed in housing 72 and is positioned to filter by air intake 116 and is drawn into air in the internal chamber 112.When operation, air pump 90 produces the air pressure that reduces in internal chamber 112, thus via filter 118/ air intake 116 from the atmospheric environment suction air to internal chamber 112.Then, the air in the internal chamber 112 is drawn into pump intake 114 and pump to air valve 102.Housing 72 seal basically when on the throne (as Fig. 1) when lid 74 is fixing, thereby all are attracted by filter 118 (passing through air intake 116 thus) by the air that air pump 90 is drawn in the internal chamber 112 basically.
Because pump intake 114 and housing inlet 116 all open wide (being coupled opposite each other with for example conduit by air hose or other types) to internal chamber 112, when air produces air stream from housing inlet 116 internal chamber 112 when pump intake 114 advances.Because controller 76 is exposed in internal chamber 112 at least a portion air stream, such layout is convenient to the cooling of electronic controller 76.Specifically, electronic controller 76 produces heat in its operating process.Be passed in the air by internal chamber 112 from the heat of electronic controller 76, thereby cooled off electronic controller 76.Such layout be convenient to the placement of controller 76 in housing 72 (thereby with controller 76 is positioned at housing 72 outside be exposed in the atmospheric environment temperature opposite).In addition, in specific implementations, cool electronic controller 76 no longer needs fin or other heat abstractors by this way.
Electronic control unit 18 also comprises fuel transmission component 120, and this fuel transmission component 120 is configured to required air and the mixture of fuel (" volume of air/gas mixture ") are supplied to fuel-fired burners 20,22.Specifically, fuel-fired burners 20,22 burning or otherwise handle the fuel of air and fuel mixture form.As what this specification limited, term " air/fuel mixture " is defined as the mixture of expression any amount air and any amount fuel, comprises " mixture " that have only fuel.In addition, term " air and fuel ratio " is intended to represent constituent of air in such air/fuel mixture and the relation between the fuel element.
An illustrated embodiment of following more detailed description fuel transmission component 120.But, should be appreciated that such description is actually exemplary, this fuel transmission component 120 can be realized in various configuration.
In the illustrative herein embodiment, fuel transmission component 120 comprises petrolift 122, and this petrolift is via the fuel tank 124 suction diesel fuels of fuel conduit 126 from truck 12.Fuel filter 128 filters from the fuel of fuel tank 124 suctions.Shown in Fig. 6 and 7, the power shaft 130 of motor-driven pulley 94 driving fuel pumps 122.Thus, motor 92 drive air pumps 90 and petrolift 122 both.
Petrolift 122 is fed to a pair of electronically controlled fuel injector 132,134 that is subjected to the fuel stream of pressurization.As shown in Figure 8, signal line 136 electrically is coupled to electronic controller 76 with fuel injector 132, thereby, make controller 76 can control the operation of injector 132.Similarly, signal line 138 electrically is coupled to electronic controller 76 with fuel injector 134, thereby, make controller 76 can control the operation of injector 134.
Be subjected to electronically controlled fuel enable valve 140 to make fuel optionally be fed to fuel injector 132,134 from petrolift 122.Particularly, when being positioned at when opening valve position, fuel enable valve 140 makes fuel can advance to fuel injector 132,134.But when fuel enable valve 140 was positioned at closed valve position, fuel can not be fed to fuel injector 132,134.The fuel that is not supplied to injector 132,134 in the fuel by pump 122 suctions returns truck fuel tank 124 via fuel return pipeline 142.Fuel enable valve 140 is electrically coupled to electronic controller 76 via signal line 144.Electronic controller 76 generates the operation (for example location) of output signal in order to control fuel enable valve 140 on signal line 144.
Fuel injector 132,134 is optionally operated by electronic controller 76 and a large amount of fuel is ejected in the mixing chamber 146, fuel mixes with air at this and produces the air/fuel mixture with required air and fuel ratio, then, this air/fuel mixture is transported to the fuel inlet nozzle 54 of fuel-fired burners 20,22 by a pair of fuel conduit 148,150.Particularly, electronic controller 76 produces output signal on signal line 136, make fuel injector 132 that the fuel of specific aequum is ejected in the mixing chamber 146, fuel mixes and is transported to via fuel conduit 148 fuel inlet nozzle 54 of fuel-fired burners 20 at this with air.Similarly, electronic controller 76 produces output signal on signal line 136, make fuel injector 134 that the fuel of specific aequum is ejected in the mixing chamber 146, fuel mixes and is transported to via fuel conduit 150 fuel inlet nozzle 54 of fuel-fired burners 22 at this with air.
In the described herein exemplary embodiment, be transported to pressurized air source 150 supplies of air from being associated of mixing chamber 146 with truck 12.For example, this pressurized air source 150 aerobraking pump that can be truck.Forced air from air source 150 is supplied to control module 18 via air pipe line 152.A pair of electronically controlled air valve 154,156 controls are fed to the air capacity of mixing chamber 146.
Air valve 154 supply pure airs stream, as hereinafter in greater detail, in the operation process of the engine 80 of truck 12, this pure air circulation often is fed to mixing chamber 146 consistently.Such air stream has prevented the accumulation of residue (for example jet-black) in the fuel inlet nozzle 54 of fuel-fired burners 20,22.Such pure air stream can produce pulsation with elevated pressures in short time interval, in order to reduce jet-black or other residues obstruction to nozzle 54.For example, under software control, pure air stream can produce pulsation, makes air for example with 60psi supply 15 seconds, cut-out (or pressure reduces) supply 45 seconds then, generation pulsation once more then, by that analogy.Having been found that increasing sharply of such air pressure produced is beneficial to power or " vibrations " that remove jet-black.
As shown in Figure 8, air valve 156 is to put the location with 154 parallel the spreading of pure air valve.Air valve 156 supply air stream, this air stream gathers with air stream from pure air valve 154.The air stream of this associating is used for the fuel atomization of fuel-fired burners 20,22 operating process.Thus, in one of them regenerative process of particulate filter 24,26, the two all is positioned at its open position separately atomization air valve 156 and pure air valve 154, in order to supplying air to mixing chamber 146, thus the fuel that atomizing is sprayed in the mixing chamber 146 by fuel injector 132,134.
Pure air valve 154 electrically is coupled to electronic controller 76 via signal line 158.Electronic controller 76 produces output signal on signal line 158, in order to the operation (for example location) of control pure air valve 154.Similarly, atomization air valve 156 electrically is coupled to electronic controller 76 via signal line 160.Electronic controller 76 produces output signal on signal line 160, in order to the operation (for example location) of control atomization air valve 156.
As shown in Figure 8, the air that leaves air valve 154,156 is supplied to mixing chamber 146 via air pipe line 162.Air pressure in the pressure converter 164 sensing air pipe lines 162.The output of converter 164 is sent to electronic controller 76 via signal line 166.The output of converter 164 can be utilized by electronic controller 76, just is being provided to mixing chamber 146 in order to checking required air stream.For example, in the described herein exemplary embodiment, be supplied to the air of air/fuel mixture of fuel-fired burners 20,22 and fuel ratio and under the air capacity that is supplied to mixing chamber 146 keeps constant situation substantially, change by changing the fuel quantity that sprays in the mixing chamber 146.Thus, the output of pressure converter 164 can be monitored by electronic controller 76, in order to determine that required substantially invariable air stream is provided to mixing chamber 146.
As mentioned above, the fuel of fuel-fired burners 20,22 is supplied with the fuel quantity that adds in the substantially invariable flow of atomization air by change and is regulated.For example, for have additional supply of to the fuel quantity of fuel-fired burners 20 (promptly, reduce the air and the fuel ratio of the air/fuel mixture that is supplied to burner 20), electronic controller 76 operating fuel injected devices 132, the air capacity in introducing mixing chamber 146 keep increasing under the substantially invariable situation fuel quantity that is ejected in the fuel mix chamber 146.Similarly, for have additional supply of to the fuel quantity of fuel-fired burners 22 (promptly, reduce the air and the fuel ratio of the air/fuel mixture that is supplied to burner 22), electronic controller 76 operating fuel injected devices 134, the air capacity in introducing mixing chamber 146 keep increasing under the substantially invariable situation fuel quantity that is ejected in the fuel mix chamber 146.
On the contrary, for reduce be supplied to fuel-fired burners 20 fuel quantity (promptly, have additional supply of to the air and the fuel ratio of the air/fuel mixture of burner 20), electronic controller 76 operating fuel injected devices 132, the air capacity in introducing mixing chamber 146 keep reducing under the substantially invariable situation fuel quantity that is ejected in the fuel mix chamber 146.For reduce be supplied to fuel-fired burners 22 fuel quantity (promptly, have additional supply of to the air and the fuel ratio of the air/fuel mixture of burner 22), electronic controller 76 operating fuel injected devices 134, the air capacity in introducing mixing chamber 146 keep reducing under the substantially invariable situation fuel quantity that is ejected in the fuel mix chamber 146.
As shown in Figure 8, the fluid pressure in the pressure regulator 168 adjusting mixing chamber 146.Particularly, pressure regulator 168 guarantees not exceed predetermined pressure in mixing chamber 146.For example, in many commercial systems, be 90psi from the air of truck pressurized air source 150.The air pressure that pressure regulator 168 will be transported to mixing chamber 146 is reduced to reduced levels, for example 40psi.
Control module 18 also comprises a pair of igniter or igniter 170,172.Igniter 170,172 electrically is coupled to electronic controller 76 via signal line 174,176 respectively.Thus, controller 76 can optionally produce the operation that control signal is come control point firearm 170,172 on signal line 174,176.Igniter 170 electrically is coupled to the electrode 48,50 of fuel-fired burners 20 via high voltage cable 178, and igniter 172 electrically is coupled to the electrode 48,50 of fuel-fired burners 22 via high voltage cable 180.The actuating of igniter 170 makes 52 in gap between the electrode 48,50 of fuel-fired burners 20 produce spark, thereby lights the air/fuel mixture that enters burner 20 by fuel inlet nozzle 54.Similarly, the actuating of igniter 172 makes and produces spark in the gap 52 between the electrode 48,50 of fuel-fired burners 22, thereby lights the air/fuel mixture that enters burner 22 by fuel inlet nozzle 54.
Igniter 170,172 can be implemented as being suitable at 52 devices that produce spark in the gap of electrode 48,50 of any type.For example, the U.S. Patent application 10/737 that is entitled as " PowerSupply and Transformer " that igniter 170,172 can be submitted on December 16th, 2003 with one or more Stephen P.Goldschmidt and Wilbur H.Crawley, disclosed device is realized in No. 333 (agent's document number 9501-73714, the document number 03MRA0454 of ArvinMeritor company).This patent application is hereby incorporated by in full.
As mentioned above, electronic controller 76 is monitored the output of a plurality of sensors that are associated with jet-black minimizing assembly 14,16.For example, jet-black reduces assembly 14,16 each all comprises flame temperature sensor 182, control temperature sensor 184 and outlet temperature sensor 186.Temperature sensor 182,184,186 electrically is coupled to electronic controller 76 via signal line 188,190,192 respectively.Shown in Fig. 2-5, temperature sensor 182,184,186 can be implemented as and extends through the thermocouple that jet-black reduces the housing of assembly 14,16, but also can adopt other forms of sensor.
The output of electronic controller 76 monitoring flame temperature sensors 182 is in order to detect or otherwise to determine the existence of lighting flame in the combustion chamber 34 of fuel-fired burners 20,22.Particularly, when the igniting of electronic controller 76 starting fluid combustion-type burners 20,22, controller 76 can be monitored the output of flame temperature sensor 182, in order to the spark ignition of the air/fuel mixture origin self- electrode 48,50 of guaranteeing to enter burner 20,22.If the output of flame temperature sensor 182 does not meet predetermined standard, then produce rub-out signal.
The output of electronic controller 76 monitoring control temperature sensors is supplied with in order to the fuel of fuel metering combustion-type burner 20,22, and the temperature that puts on the heat of particulate filter 24,26 with maintenance is in the predetermined scope.For example, temperature controlling range can be designed to allow to be enough to the heat of abundant regenerate particulate filters 24,26 and to prevent that simultaneously filter 24,26 is under the excessive temperature that may destroy filter 24,26.Should be appreciated that temperature controlling range can design at satisfying other purpose.
Be used for being shown in Fig. 9 and 10 at the exemplary temperature control program 200 of filter regeneration process control fuel-fired burners 20,22.Control program 200 is with step 202 beginning, and in the step 202, electronic controller 76 is determined the temperature of the heat that burner is produced.Specifically, electronic controller 76 scans or otherwise reads signal line 190, in order to the output of monitoring control temperature sensor 184.In case electronic controller 76 has been determined the temperature of fuel-fired burners 20,22 heat that produced, program advances to step 204.
In step 204, electronic controller 76 determines whether the temperature of fuel-fired burners 20,22 heat that produced is in the predetermined temperature controlling range.Specifically, as described herein, can set up predetermined temperature controlling range.In the described herein illustrative embodiments, can utilize target temperature (for example in conjunction with predetermined last control limit and lower control limit (as Figure 10), under the situation of particulate filter 24,26 not being carried out catalysis is 650 degrees centigrade, is 350 degrees centigrade under the situation of filter 24,26 being carried out catalysis).Thus, in step 204, the fuel-fired burners 20 that electronic controller 76 determines whether to sense, the temperature of 22 heat that produced are in the predetermined temperature controlling range (that is, less than last boundary greater than boundary) down.If the temperature of fuel-fired burners 20,22 heat that produced is in the predetermined temperature controlling range, then control program 200 loops back the output that step 202 continues to monitor control temperature sensor 184.But, if the temperature of fuel-fired burners 20,22 heat that produced is not in the predetermined temperature controlling range, if then produce control signal---the temperature of fuel-fired burners 20,22 heat that produced is higher than control limit then advances to step 206, if the temperature of fuel-fired burners 20,22 heat that produced is lower than lower control limit then advances to step 208.
In step 206, electronic controller 76 reduces the fuel that is supplied to fuel-fired burners 20,22.For this reason, electronic controller 76 sprays air and the fuel ratio that fuel quantity in the mixing chamber 146 has increased the air/fuel mixture that is supplied to burner 20,22 by reducing by fuel injector 132,134.For example, in order to reduce the fuel that is supplied to fuel-fired burners 20, electronic controller 76 produces to reduce by fuel injector 132 on signal line 136 and sprays the control signal of the fuel quantity in the mixing chamber 146, thereby has increased air and the fuel ratio that is supplied to the air/fuel mixture of burner 20 via fuel conduit 148.Similarly, in order to reduce the fuel that is supplied to fuel-fired burners 22, electronic controller 76 produces to reduce by fuel injector 134 on signal line 138 and sprays the control signal of the fuel quantity in the mixing chamber 146, thereby has increased air and the fuel ratio that is supplied to the air/fuel mixture of fuel-fired burners 22 via fuel conduit 150.In case reduced the fuel that is supplied to fuel-fired burners 20,22, control program advances to step 210.
In step 210, whether the super range condition in electronic controller 76 determining steps 206 repeats to take place.More specifically, controller 76 determines whether that the temperature reading of predetermined number has been positioned at outside the described control range.Specifically, the previous fuel adjusting result of electronic controller 76 monitoring determines whether fuel-fired burners 20,22 has got back to the operation in the predetermined temperature control range.If controller 76 determines that the temperature reading of predetermined number has been positioned at outside the described control range, then electronic controller 76 draws the conclusion that fuel-fired burners 20,22 can not be recovered to control, and produce rub-out signal, and then control program 200 advances to step 212.Otherwise control program 200 loops back the operation that step 202 continues the fuel-fired burners 20,22 in the monitor filter regenerative process.
In step 212, electronic controller 76 cuts out fuel-fired burners 20,22.Specifically, because electronic controller 76 draws the conclusion that fuel-fired burners 20,22 can not be recovered to control in step 210, so controller 76 stops to burner 20,22 fuel supplying that influenced, stop at 48,50 at electrode and produce spark, or otherwise stop the operation of the burner 20,22 that influenced.
Get back to step 204, if the temperature of fuel-fired burners 20,22 heat that produced is lower than lower control limit, then control program advances to step 208.In step 208, electronic controller 76 is had additional supply of to the fuel of fuel-fired burners 20,22.For this reason, electronic controller 76 sprays air and the fuel ratio that fuel quantity in the mixing chamber 146 has reduced the air/fuel mixture that is supplied to burner 20,22 by increasing by fuel injector 132,134.For example, in order to have additional supply of to the fuel of fuel-fired burners 20, electronic controller 76 produces to increase by fuel injector 132 on signal line 136 and sprays the control signal of the fuel quantity in the mixing chamber 146, thereby has reduced air and the fuel ratio that is supplied to the air/fuel mixture of burner 20 via fuel conduit 148.Similarly, in order to have additional supply of to the fuel of fuel-fired burners 22, electronic controller 76 produces to increase by fuel injector 134 on signal line 138 and sprays the control signal of the fuel quantity in the mixing chamber 146, thereby has reduced air and the fuel ratio that is supplied to the air/fuel mixture of burner 22 via fuel conduit 150.In case increased the fuel that is supplied to fuel-fired burners 20,22, control program advances to step 210, and determines whether that with aforementioned manner the control of fuel-fired burners recovers.
The output of output temperature sensor 186 also can be used to control the operation of the fuel-fired burners 20,22 in the regenerative process of particulate filter 24,26 by electronic controller 76.Specifically, as shown in figure 11, in the filter regeneration process, control program 250 can be carried out by electronic controller 76.Control program 250 is with step 252 beginning, and in the step 252, electronic controller 76 is determined the temperature in particulate filter 24,26 exits.Specifically, electronic controller 76 scans or otherwise reads signal line 192, in order to the output of monitoring outlet temperature sensor 186.In case electronic controller 76 has been determined the temperature in particulate filter 24,26 exits, program advances to step 254.
In step 254, electronic controller 76 determines whether the filter outlet temperature that is sensed is higher than predetermined last temperature limit.Go up temperature limit if the filter outlet temperature is lower than, then control program 250 loops back the output that step 25 continues to monitor outlet temperature sensor 186.But if the filter outlet temperature is higher than control limit, then control program 250 advances to step 256.
In step 256, electronic controller 76 cuts out fuel-fired burners 20,22.Specifically, because electronic controller 76 draws the conclusion that the filter outlet temperature is higher than control limit in step 254, so controller 76 stops to burner 20,22 fuel supplying that influenced, stop at 48,50 at electrode and produce spark, or otherwise stop the operation of the burner 20,22 that influenced.Then, control program 250 advances to step 258.
In step 258 and 260, whether electronic controller 76 definite filter outlet temperature have been cooled to and have been lower than the temperature that goes up control limit.Specifically, in step 258, electronic controller 76 scans or otherwise reads signal line 192, in order to the output of monitoring outlet temperature sensor 186, to determine the temperature in particulate filter 24,26 exits.In case electronic controller 76 has been determined the temperature in particulate filter 24,26 exits, program 250 advances to step 260.
In step 260, electronic controller 76 determines whether the filter outlet temperature that is sensed still is higher than predetermined last temperature limit.If the filter outlet temperature still is higher than control limit, then control program 250 loops back the output that step 258 continues to monitor outlet temperature sensor 186.But, if being lower than now, the filter outlet temperature goes up temperature limit, then control program 250 advances to step 262.
In step 262, electronic controller 76 is restarted fuel-fired burners 20,22.Specifically, since electronic controller 76 in step 260, draw the filter outlet temperature be lower than now on the conclusion of control limit, so controller 76 beginnings are to affected burner 20,22 fuel supplying, between electrode 48,50, produce spark, and the operation that otherwise restarts affected burner 20,22.Then, control program 250 loops back the operation that step 250 is monitored burner 20,22.
Electronic controller 76 is also monitored the output of a plurality of pressure sensors that are associated with jet-black minimizing assembly 14,16.For example, jet-black reduces assembly 14,16 each comprises filter inlet pressure sensor 264 and filter outlet pressure sensor 266 (as Fig. 8). Pressure sensor 264 and 266 electrically is coupled to electronic controller 76 via signal line 268 and 270 respectively.Pressure sensor 264,266 can be any type of pressure sensor device realize, such as obtainable pressure sensor on the market for example.
The output function that the regeneration of particulate filter 24,26 can be used as pressure sensor 264,266 begins.For example, can utilize pressure sensor 264,266 to come sensing to pass the pressure reduction (that is, passing " pressure drop " of filter) of particulate filter 24,26, need regeneration in order to determine when filter 24,26.Particularly, when passing one of them pressure drop of particulate filter 24,26 when being increased to predetermined value, to these filter 24,26 beginning filter regeneration processes.Should be appreciated that pressure sensor 264,266 can be implemented as single-sensor.Specifically, can use the single-sensor of measuring pressure reduction.Such sensor has two input ports, and one of them input port is measured the pressure of filter upstream, and another input port is measured the pressure in filter downstream.Pressure reduction between its port of in operation, such sensor measurement and generation are about the signal of this pressure reduction.In addition, be also to be understood that in specific embodiment, can on any of filter 24,26, use single filter.In such configuration, the output of monitoring this single pressure sensor determines when that pressure exceeds predetermined upper threshold value or is lower than predetermined lower threshold value (pressure drop of passing filter with monitoring is opposite).
Should be appreciated that the control model that is used to start filter regeneration can design by various different modes.For example, can utilize based on control model regularly, wherein the regeneration of particulate filter 24,26 begins as the function of time.For example, the fixed time interval that can be scheduled to of the regeneration of particulate filter 24,26 carries out.
The output of pressure sensor 264,266 also can be used in combination the regeneration that triggers particulate filter 24,26 with other information.For example, can use the regeneration that triggers filter as the pressure drop of passing filter 24,26 of the discharge mass flow function of engine 80.For this reason, at first produce the tables of data (for example mapping) of particulate filter 24,26 with experimental technique.In order to produce such mapping, the pressure drop of passing filter 24,26 is as the function of the discharge mass flow under variable grain (jet-black) loading condition and mapped.Particularly, filter 24,26 at first is injected into the jet-black of specified amount.The loading condition that the expectation load that this amount of soot can represent to make regeneration to necessitate is regenerated.For example, if regenerate when requiring particulate filter 24,26 loads in particular type for example to reach 5.0g/l, the filter that then is used for producing with experimental technique mapping is at first pre-installed the jet-black (being 5.0g/l) that is loaded with such amount.In case preloaded is good, then in a plurality of different pressure drops of passing filter with the experimental technique measurement under the mass flow situation of discharging.Can produce look-up table (for example mapping) then, it comprises a plurality of voltage drop values that draw with experimental technique, and each voltage drop value is corresponding to a plurality of different values of discharging in the mass flow value.Such mapping can be programmed in the controller 76.
Then, the mapping of such voltage drop value that draws with experimental technique can be used for determining when and triggers regeneration.Specifically, in the operation process of engine 80, controller 76 can determine to pass the current pressure drop of filter 24,26 and the discharge mass flow of engine 80.As described herein, pressure drop can be determined by the output of monitor force sensor 264,266.As described in more detail below, controller 76 can determine to discharge mass flow, described mass flow sensor 892 such as heated filament (hot wire) mass flow sensor by the output of quality monitoring flow sensor 892 (as Fig. 8).Should be appreciated that, controller 76 can with mass flow sensor 892 direct communications, perhaps obtain the output of sensors 892 from control unit of engine 78 via CAN interface 314 (this CAN interface 314 will be discussed in more detail below).Selectively, discharging mass flow can be calculated by controller 76 in a usual manner by use such as engine speed (RPM), turbocharging and the engine operation parameters (with such as other known parameters such as engine displacement) that enters collector temperature etc.Should be appreciated that, but controller 76 calculated mass flows itself perhaps can obtain the mass flow calculated via CAN interface 314 from control unit of engine 78.
In case controller 76 has determined to pass the pressure drop of particulate filter 24,26 and the discharge mass flow of engine 80, the discharge mass flow of the engine 80 that the boundary value of controller 76 inquiry look-up tables (i.e. mapping) to obtain forming with experimental technique then, this boundary value arrive corresponding to institute's sensing (calculating).Then, controller 76 compares pressure drop of passing particulate filter 24,26 that is sensed and the boundary value that is obtained.If the pressure drop of passing particulate filter 24,26 that is sensed exceeds the boundary value that is obtained, then controller 76 determines that filter 24,26 needs regeneration and beginning regeneration cycle.
Figure 34 shows and is used for based on as the pressure drop of passing filter of the function of exhaust mass flow and trigger the example control program 860 of filter regeneration.Program 860 is with step 862 beginning, and in the step 862, electronic controller 76 determines to pass the pressure drop (Δ P) of filter 24,26.Particularly, the output of controller 76 monitor force sensors 264,266 and calculate the pressure drop (Δ P) pass filter thereafter.Then, control program 860 advances to step 864.
In step 864, controller 76 is determined the discharge mass flow of engine 80.As mentioned above, controller 76 can the output by quality monitoring flow sensor 892 determine to discharge mass flow, or determines this discharge mass flow by utilizing such as engine RPM, turbocharging and engine operation parameters (with such as other known parameters such as the engine displacement) calculating that enters collector temperature etc.In either case, in case controller has been determined the discharge mass flow, then control program advances to step 866.
In step 866, the boundary value of controller 76 inquiry look-up tables (being filter map) to obtain to form with experimental technique, this boundary value is corresponding to the discharge mass flow (determining in step 864) of institute's sensing (calculating).In case controller 76 obtains boundary value from look-up table, then control program 860 advances to step 868.
In step 868, pressure drop of passing filter 24,26 that controller 76 is relatively sensed (in step 862, determining) and the boundary value that is obtained.If the pressure drop of passing particulate filter 24,26 that is sensed exceeds the boundary value that is obtained, then controller 76 draws the conclusion that filter 24,26 needs regeneration, and control program 860 advances to step 870.If the pressure drop of passing particulate filter 24,26 that is sensed does not surpass the boundary value that is obtained, then control program 860 returns step 860 and continues accumulation in the monitor filter 24,26.
In step 870, the regeneration of controller 76 beginning filters.Particularly, electronic controller 76 operation fuel-fired burners 20,22 are with arbitrary mode regenerate particulate filters 24,26 in numerous modes described herein.In case finish filter regeneration, control program 870 finishes.
The output of pressure sensor 264,266 also can be used for the performance of monitoring engine 80.Specifically, the soot accumulation feature in the particulate filter 24,26 can be represented certain engine performance characteristics.For example, too much or other the abnormal soot accumulation in the particulate filter 24,26 may be represented engine 80 usefulness oil too much.Too much or other abnormal soot accumulation in the particulate filter 24,26 can be represented also may represent engine fuel injector jam or leakage.Electronic controller 76 can be configured to monitor and analyze the output of pressure sensor 264,266 to determine whether to exist any such engine condition.
Should be appreciated that, if given design utilizes method or the device beyond the pressure sensor to distinguish the soot accumulation of deciding in the particulate filter 24,26, can monitor or analyze the output that obtains by such method or device and determine whether to exist any such engine condition.Thus, be used for should be appreciated that also that based on the output monitoring of pressure sensor 264,266 example embodiment such description is not the system that is intended to only be limited to based on pressure sensor although will describe in more detail below as the control model of the engine performance of the function of the soot accumulation of filter 24,26.
Referring now to Figure 12, show the control program 300 that is used for monitoring as the engine performance of the function of the soot accumulation of filter 24,26.This program begins with step 302, in the step 302, and the soot accumulation speed that electronic controller 76 is determined in the filters 24,26.Specifically, in engine 80 operation process, the pressure drop (Δ P) of passing filter 24,26 is by controller 76 continuous monitorings.Particularly, read the output of pressure sensor 264,266, also subsequently it is stored in the table of storage device (for example RAM or other storage devices that is associated with electronic controller 82) thereby can calculate pressure drop (Δ P) with predetermined frequency.Can be along with following the trail of pressure drop (Δ P) time lapse.For example, one of them the diagrammatic representation of pressure drop (Δ P) of filter 24,26 of passing of following the trail of as the function of time is shown among Figure 13.In the described herein illustrated embodiment, can determine the speed of soot accumulation by following the trail of pressure drop (Δ P) in time, shown in the line in the diagrammatic representation of Figure 13 312.In case determined the soot accumulation speed in the soot particles filter 24,26, then program 300 advances to step 304.
In step 304, the soot accumulation speed in the electronic controller 76 analysing particulates filters 24,26.In the described herein exemplary embodiment, controller 76 comes soot accumulation speed in the analysing particulates filter 24,26 by analyzing by the slope of following the trail of the line 312 that pressure drop (Δ P) produced in time.For example, if the maintenance of the slope of line 312 is relatively constant (promptly, be in the predetermined threshold of the expression constant-slope of being thought), such as indicated with dotted line in Figure 13, then electronic controller 76 draws the conclusion that particulate filter 24,26 interior soot accumulation speed do not have change.But if the slope increase of line 312 exceeds predetermined threshold (shown in solid line among Figure 13), then electronic controller 76 draws the conclusion that the soot accumulation speed in the particulate filter 24,26 changes.Should be appreciated that can utilize additive method to come soot accumulation speed in the analysis and filter device 24,26, method only actually described herein is exemplary.In case electronic controller 76 by analysis the soot accumulation situation in the particulate filter 24,26, then control program 300 advances to step 306.
In step 306, electronic controller 76 determines whether the soot accumulation speed in the particulate filter 24,26 shows predetermined engine condition.Particularly, can inquire about the soot accumulation speed that the look-up table that is stored in the storage device 84 (or other storage devices that are associated with electronic controller 82) determines in step 304 to be analyzed and whether meet predetermined standard.For example, whether the analysis that is used for determining step 304 of the content of look-up table shows that soot accumulation speed does not have to change or change in predetermined tolerance limit.If so, controller 76 draws the conclusion that soot accumulation speed does not show engine condition, and this control program loops back step 302 and continues soot accumulation situation in the monitor filter 24,26.Whether the analysis that the content of look-up table also can be used for carrying out in the determining step 304 shows the change of the soot accumulation speed outside predetermined threshold.If so, controller 76 draws the conclusion that soot accumulation speed can show engine condition, and control program 300 advances to step 308.
In step 308, electronic controller 76 produces rub-out signal.For example, electronic controller 76 can produce an output signal, and operator (for example driver of truck 12) is presented in the alarm that this output signal causes producing vision, the sense of hearing or other types.This rub-out signal can only cause using information updating electronic diary or the analog relevant with the filter analysis of step 302-306.
As indicated in the step 310, rub-out signal can be communicated by letter with the control unit of engine that is associated with engine 80 (ECU) 78.The details that more detailed description is done so below.But, should be appreciated that, such description is not limited to the transmission of the rub-out signal that produced in the step 308 of control program 300, but any rub-out signal described herein (any other rub-out signals that produce with controller 76) all can send control unit of engine 78 to.In addition, as discussed in detail hereinafter, control unit of engine 78 can be conveyed to controller 76 with the information such as engine operation information etc.
In the mode of routine, engine system such as the engine 80 of truck 12 comprises control unit of engine, and this control unit of engine is to be responsible for the electronic signal that the decipher engine sensor transmitted and to activate being subjected to electronically controlled engine components to control the master computer of engine in essence.For example, control unit of engine can be operated the beginning and the end of each injection cycle that is used for definite each cylinder, or in response to sending out the parameter that is sensed and determine fuel measurement and injection timing such as engine crankshaft position and rotating speed (RPM), engine coolant and intake air temperature and absolute plenum pressure etc.
The rub-out signal that controller 76 is produced (or the follow-up signal that produces in response to this rub-out signal) can be conveyed to control unit of engine 78.Particularly, the electronic controller 76 of emission abatement assembly 10 can be configured to via interface 314 and communicates by letter with control unit of engine 78.Interface 314 can be the communication interface that can realize the electronic communication between electronic controller 76 and the control unit of engine 78 of any type.An interface type that is suitable for use as interface 314 is controller local area network or " CAN " interface.The CAN interface is the microcontroller universal serial bus net that connects device, sensor and the actuator be used for system that control in real time uses or subsystem.The CAN interface is at first developed in 1986 by Robert Bosch GmbH, the details of CAN interface is at the document record of ISO11898 (being used for the application of the highest 1 mbit/) and ISO11519 (being used for the application of the highest 125 kilobits/second), and these two documents in this combination as a reference.
Utilize CAN interface 314, can obtain and be that electronic controller 76 is used from control unit of engine 78 such as the information of engine speed and turbo boost pressure etc.In the process of carrying out specific control program, controller 76 can use such information.By using information, got rid of in order to determine this redundant sensor array that only is used for the information of electronic controller from control unit of engine 78.
In addition, CAN interface 314 permission rub-out signals (for example error flag) or analog are to the transmission of control unit of engine 78, so that control unit of engine 78 uses in its operating process.For example, the rub-out signal (as the description to control procedure 300) that shows engine problem can be communicated to control unit of engine 78.Be equipped with this information, control unit of engine 78 can be programmed to carry out other engine analysis, to be stored in the error log that can be visited by the maintenance personnel to truck operator generation rub-out signal (for example the indicator on the truck instrument board is lighted) or with error message.If desired, CAN interface 314 also allows the engine producer to take to a certain degree control in the operation of emission abatement assembly 10.
Thus, should be appreciated that, the operation of the controller of control module 18 76 monitoring fuel-fired burners 20,22 (or parts of other emission abatement assemblies 10), in order to determine whether to meet predetermined state described herein (or other situations) wherein any.Then, controller 76 can produce such as rub-out signal etc. and show the signal of such situation and this signal is communicated to control unit of engine 78 via CAN interface 314.In addition, CAN interface 314 can be used to the information such as information relevant with power operation etc. is communicated to controller 76 by control unit of engine 78.For example, relevant with engine speed or turbo boost pressure information is communicated to controller 76 via CAN interface 314.Except engine operation information, if like this configuration, start control module 78 also can produce to be used to control fuel-fired burners 20,22 operation control signal and it is communicated to controller 76.For example, can programme to control unit of engine 78 and start the regeneration cycle of particulate filter 24,26.Under these circumstances, control unit of engine 78 can produce control signal and this control signal is communicated to controller 76, thereby makes one of them the regeneration of controller 76 beginning particulate filters 24,26.
As shown in figure 29, the electronic controller 76 of control module 18 can be integrated with control unit of engine 78.Thus, except the operation of control engine 80, control unit of engine 78 is also controlled the operation of emission abatement assembly 10.In this way, control unit of engine 78 still is responsible for the signal of telecommunication and the responsible master computer that activates the electronics controlled part that is associated with emission abatement assembly 10 that decipher is sent by the sensor that is associated with emission abatement assembly 10 in essence.For example, control unit of engine 78 can be operated beginning and the end that is used for determining each regeneration period, determine to introduce the fuel and amount and the fuel and the air ratio of air of fuel-fired burners 20,22, and other functions of controller 76 realizations by emission abatement assembly 10 described herein.
Like this, control unit of engine 78 comprises a plurality of electronic units, these electronic unit associated together used electronic unit in the control of engine system.For example, electronic control unit 78 can wrap such as the processor of microprocessor 728 and such as the storage device 730 of read-only memory device able to programme (PROM), and read-only memory device wherein able to programme comprises can wipe PROM (EPROM or EEPROM).
Storage device 730 is provided for for example instruction of a software program (or a plurality of program) form of storage, and when being carried out by processor, it makes engine controller 78 can control the two operation of engine 80 and emission abatement assembly 10.Like this, as shown in figure 29, control unit of engine 78 electrically is coupled to engine 80 and emission abatement assembly 10 on both.Specifically, control unit of engine 78 electrically is coupled to engine 80 via signal line 718, and control unit of engine 78 electrically is coupled to emission abatement assembly 10 via signal line 720.Although each all is shown schematically as uniline signal line 718,720, but should be appreciated that the permission that signal line 718,720 can be configured to any type carries assembly at the signal of direction between control unit of engine 78 and engine 80 or the emission abatement assembly 10 or the electrical signal transfer on the both direction respectively.For example, any or both can be implemented as the wire harness with many signal lines in the signal line 718,720, and this wire harness transmits the signal of telecommunication respectively between control unit of engine 78 and engine 80 or emission abatement assembly 10.In such layout, a plurality of engine sensors 734 that are associated with emission abatement assembly 10 or 736 the signal that operation produced are delivered to control unit of engine 78 via corresponding wire harness, and the wire harness of the signal that is produced by control unit of engine 78 by correspondence is delivered to engine 80 or emission abatement assembly 10.Should be appreciated that, can use other wiring configurations of any amount.For example, for the design of any or both in the signal line 718,720, can use independent separately holding wire maybe can use the system that utilizes signal multiplexer.In addition, signal line 718,720 can be integrated into and use single wire harness or system that engine 80 and emission abatement assembly 10 electrically are coupled to control unit of engine 78.
Control unit of engine 78 also comprises analog interface circuit 732.Analog interface circuit 732 will convert the signal of the input that is suitable for being presented in microprocessor 728 from the output signal that each simulated engine sensor 734 and discharging reduce sensor 736 to.Specifically, analog interface circuit 732 becomes the used data signal of microprocessor 728 by utilizing analog to digital (A/D) converter (not shown) etc. with sensor 734,736 analog signal conversion that produced.Should be appreciated that A/D converter can be implemented as discrete device or multiple arrangement, perhaps can be integrated in the microprocessor 728.Any one in the sensor 734,736 or a plurality of generation digital output signal be also to be understood that if then can get around analog interface circuit 732.
Should be appreciated that it can be any sensor about emission abatement assembly 10 described herein that the discharging of communicating by letter with control unit of engine 78 reduces sensor 736.For example pressure sensor 264,266 and the temperature sensor 182,184,186 that is associated with jet-black minimizing assembly 14,16 can be coupled to control unit of engine 78.In addition, the sensor of control module 18 and detector 164,426,460,510 can be coupled to control unit of engine 78.
Analog interface circuit 732 also will be converted to the output signal that is suitable for being presented in electric controlled part 744 that is associated with engine 80 and the electronics controlled part 746 that is associated with emission abatement assembly 10 from the signal of microprocessor 728.Specifically, analog interface circuit 732 converts the data signal that microprocessor 728 produced to by utilizing digital-to-analog (D/A) converter (not shown) or analog: by the used analog signal of the electric controlled part that is associated with engine such as fuel injector assembly, ignitor assembly, fan component etc. 744, and by the used analog signal of the electronics controlled part that is associated with emission abatement assembly 10 such as pump motor 92, air valve 102, fuel injector 132,134, valve 140,154,156 and igniter 170,172 etc. 746.Should be appreciated that be similar to above-mentioned A/D converter, D/A converter can be implemented as discrete device or multiple arrangement, perhaps can be integrated in the microprocessor 728.Should be appreciated that, if the electronics controlled part 744 that is associated with engine 80 and with electronics controlled part 746 that emission abatement assembly 10 is associated in any one or a plurality of analog input signal is operated, then can get around analog interface circuit 732.
Therefore, can operate control unit of engine 78 and control the two operation of engine 80 and emission abatement assembly 10.Specifically, control unit of engine 78 is operated with closed loop control mode, in this configuration, and the output of control unit of engine 78 monitoring sensors 734,736, in order to the input of control to controlled part 744,746, thus the operation of management engine 80 and emission abatement assembly 10.Specifically, control unit of engine 78 is communicated by letter with sensor 734, in order to determine engine coolant temperature, Manifold Air Pressure, the position of bent axle/flywheel and the amount of oxygen in speed and the waste gas wherein.Be equipped with these data, control unit of engine 78 per seconds carry out many calculating, comprise the value in the table that searches pre-programmed, so that performing a programme is achieved as follows function, that is, change ignition timing or determine how long fuel injector stays open in specific cylinder.
With the control of such engine 80 simultaneously, control unit of engine 78 is also carried out the program of the operation that is used to control emission abatement assembly 10.Specifically, control unit of engine 78 is communicated by letter with sensor 736, in order to the soot accumulation level in definite particulate filter wherein and each temperature and pressure reading etc.Be equipped with these data, control unit of engine 78 per seconds carry out many calculating, comprise the value in the table that searches pre-programmed, so that execution algorithm is achieved as follows function, that is, to fuel-fired burners 20,22 fuel supplying and air, make electrode 48,50 energising etc.
Thus, the two operation of control unit of engine 78 control engines 80 and emission abatement assembly 10.Specifically, in the operating process of engine 80, control unit of engine 78 is carried out the fuel injector control program, and this program produces the injection signal of many injection pulse forms, and these injection signals are communicated to each injector of engine fuel injector assembly.Fuel injector is opened the preset time section in response to the reception of injection pulse, thereby injects fuel in the corresponding cylinder of engine 80.When carrying out the fuel injection program, control unit of engine 78 is carried out the burner control program, this program produces many control signals, these control signals are communicated to each electronics controlled part 746 that is associated with emission abatement assembly 10, thus the operation of control fuel-fired burners 20,22.For example, produce and also to pass on signal, be used to change the fuel quantity that is supplied to fuel-fired burners 20,22, give electrode 48,50 energisings etc.
In addition, control unit of engine 78 is also monitored the input from each sensor 736 that is associated with emission abatement assembly 10, so that utilize this input in the closed-loop control of assembly 10.For example, utilize the signal be communicated to control unit of engine 78 come monitor soot reduce the specific region in the assembly 14,16 temperature, pass the pressure drop of particulate filter 24,26 and many other functions described herein.
Should be appreciated that such program (that is, fuel injector control program and fuel reformer control program) can be implemented as software program separately maybe can be combined into a single software program.
Referring now to Figure 14, the control program 350 that the ash that is used for monitor particles filter 24,26 gathers situation is shown.When a plurality of filter regenerations took place, along with time lapse, ash was accumulated in the particulate filter 24,26.By the pressure drop of passing particulate filter 24,26 (Δ P) of monitoring (for example measuring and the record data daily record) after each filter regeneration process, can determine when to need to remove the ash of filter.Particularly, as herein in greater detail, in each filter regeneration cycle soon, obtain to pass the pressure drop (Δ P) of particulate filter 24,26 and it is stored in the memory.Exceed predetermined last boundary in case pass the pressure drop of particulate filter 24,26, produce then that show need be by coming the rub-out signal of maintenance filter from the filter ash disposal.
Control program 350 is with step 352 beginning, in the step 352, electronic controller 76 regenerate particulate filters 24,26 one of them.Specifically, so the place in greater detail, electronic controller 76 operation fuel-fired burners 20,22 produce the heat in order to regenerate particulate filters 24,26.In case finish regeneration cycle, then control program 350 advances to step 354.
In the step 354, the pressure drop (Δ P) that electronic controller 76 is measured the particulate filter 24,26 that passes nearest regeneration.Particularly, read the output of pressure sensor 264,266 of the filter of nearest regeneration, thereby can calculate pressure drop (Δ P).
After this, control program advances to step 356, in step 356, pressure drop (Δ P) value of passing the particulate filter 24,26 of nearest regeneration is stored in the table of storage device (for example RAM or other storage devices that is associated with electronic controller 82).Then, control program 350 advances to step 358.
In step 358, whether the pressure drop (Δ P) that electronic controller 76 determines to pass the particulate filter 24,26 of nearest regeneration is higher than predetermined last boundary.Be lower than boundary on this if pass the pressure drop (Δ P) of the particulate filter 24,26 of nearest regeneration, then control program 350 finishes, up to being restarted after next filter regeneration cycle is finished.But, be higher than control limit on this if pass the pressure drop (Δ P) of the particulate filter 24,26 of nearest regeneration, then control program 350 advances to step 360.
In step 360, electronic controller 76 produces rub-out signal.For example, electronic controller 76 can produce an output signal, and operator (for example driver of truck 12) is presented in the alarm that this output signal causes producing vision, the sense of hearing or other types.Selectively, this rub-out signal can only cause using information updating electronic diary or the analog relevant with the filter analysis of step 352-358.Should be appreciated that the rub-out signal that produces in the step 360 can be configured to the warning of any type or error tracking device and uses the demand that designs with the system that meets appointment.
As indication in step 362, if electronic controller 76 so is equipped with, then the rub-out signal follow-up signal of rub-out signal generation (or in response to) can be communicated to control unit of engine 78 via CAN interface 314.Be equipped with this information, control unit of engine 78 can be programmed with carry out other filter analysis, to truck operator produce that the affected filter 24,26 of indication needs to safeguard the rub-out signal (for example the indicator on the truck instrument board is lighted) of (that is, dust removes) or error message is stored in can error log by maintenance personnel's visit in.The finishing control program 350 then.
As mentioned above, electronic controller 76 can use a plurality of different control models to determine when particulate filter 24,26 one of them needs regeneration.For example, can utilize sensor-based pattern or based on regularly pattern.In either case, when controller 76 determined particulate filter 24,26 one of them need regenerate the time, the beginning regeneration cycle, wherein electronic controller 76 is operated fuel-fired burners 14,16 respectively and is come regeneration filter 24,26.For this reason, operation air pump 90 and air valve 102 are to suitable burner 20,22 supply combustion airs.Side by side, via fuel transmission component 120 to suitable burner 20,22 fuel supplying.Specifically, for to right material combustion-type burner 20 fuel supplying, operating fuel injected device 132 sprays into mixing chamber 146 with fuel, and wherein fuel atomizes in the flow of atomization air that is supplied to mixing chamber 146 by air valve 154,156.The air/fuel mixture that is produced is directed at the fuel inlet nozzle 54 of fuel-fired burners 20 via fuel conduit 148.On the other hand, for to right material combustion-type burner 22 fuel supplying, operating fuel injected device 134 sprays into mixing chamber 146 with fuel, and wherein fuel atomizes in the flow of atomization air that is supplied to mixing chamber 146 by air valve 154,156.The air/fuel mixture that is produced is directed at the fuel inlet nozzle 54 of fuel-fired burners 22 via fuel conduit 150.
The air/fuel mixture that enters burner 20,22 via fuel inlet nozzle 54 is lighted by electrode 48,50.Under the situation of operation fuel-fired burners 20, activate igniter 170 and 52 in gap between the electrode 48,50 of fuel-fired burners 20 produces spark, thereby light the air/fuel mixture that leaves fuel inlet nozzle 54.Under the situation of operation fuel-fired burners 22, activate igniter 172 and 52 in gap between the electrode 48,50 of fuel-fired burners 22 produces spark, thereby light the air/fuel mixture that leaves fuel inlet nozzle 54.
As mentioned above, the output of electronic controller 76 monitoring flame temperature sensors 182 is in order to the appearance of lighting flame in the combustion chamber 34 of the fuel-fired burners 20,22 that detects or otherwise determine to be activated.Particularly, when the igniting of electronic controller 76 starting fluid combustion-type burners 20,22, the output of controller 76 monitoring flame temperature sensors 182 is in order to the spark ignition of the air/fuel mixture origin self- electrode 48,50 of guaranteeing to enter burner 20,22.If the output of flame temperature sensor does not meet predetermined standard, then produce rub-out signal.
In case fuel-fired burners 20,22 activates, then it begins to produce heat.Such thermal conductance (flows with respect to waste gas) downstream and contacts with the upstream face of particulate filter 24,26.This focus combustion and burning are collected in the soot particles in the filter base 60, thus regenerate particulate filters 24,26.Illustration ground, the heat of 600-650 degree centigrade of scope can be enough to the uncatalyzed filter of regenerating, and the heat of 300-350 degree centigrade of scope can be enough to regenerate filter through catalysis.
In illustrated embodiment, the regeneration of particulate filter 24,26 may a few minutes only consuming time.In addition, should be appreciated that, in case by respectively from the thermal starting of fuel-fired burners 24,26, the regeneration of particulate filter 24,26 just can be kept certainly.Particularly, in case filter 24,26 is heated to and is collected in the temperature that soot particles wherein begins to light, the lighting of initial part that is collected in soot particles wherein can make all the other soot particles light---its mode mode with the smoulder that passes through with cigar to a great extent is identical.In essence, when soot particles " burning ", discharge certain heat in " combustion zone ".Partly, soot layer (in the combustion zone) now than the next-door neighbour center on portion's heat many.Thus, heat is delivered to the soot layer in downstream, also unlit combustion zone.Institute's energy delivered can be enough to start the oxidation reaction that makes unlit jet-black reach the temperature on its ignition temperature.Like this, may only need be used to begin the regenerative process (that is, beginning to be collected in the ignition process of jet-black wherein) of filter 24 from the heat of fuel-fired burners 20,22.
In regeneration cycle, fuel-fired burners 20,22 can be controlled about the mode of Fig. 9-11 description herein.Particularly, can utilize control procedure 200 and 250 to come monitor soot to reduce temperature in the assembly 14,16 in mode described herein.
Referring now to Figure 30 and 31, show the control program 750 that is used for starting fluid combustion-type burner 20,22 when regeneration cycle begins.This program is with step 752 beginning, and in the step 752, this program determines whether to carry out the request (being burner startup request) of starting fluid combustion-type burner 20,22.Should be appreciated that burner startup request can take a number of different forms, for example comprise by indication producing the startup request by software control procedure in response to the regeneration of one of institute's sensing, regularly or otherwise definite particulate filter 24,26 needs.For example, can utilize sensor-based pattern, produce based on the pattern of mapping or based on regularly pattern and to start request.Thus, in step 752,, then produce control signal and program 750 advances to step 754 if control program 750 detects burner startup request.If control program 750 does not detect burner startup request, then program 750 loops back step 752 and continues as such request and monitor.
In step 754, electronic controller 76 is lighted flame so that help to the higher relatively fuel quantity of fuel-fired burners 20,22 supplies in combustion chamber 34.Particularly, air/fuel mixture is supplied to burner 20,22, at this place, under the situation of the combustion air that exists control module 18 to be supplied, this mixture is by the spark ignition between the electrode 48,50.This initial fuel level of supply illustrates with the arrow 764 of Figure 31.Then, control program 750 advances to step 756.
In step 756, controller 76 determines whether to light a fire.Controller 76 different modes is arbitrarily done like this.For example, electronic controller 76 can be monitored the output of flame temperature sensor 182, in order to detect or otherwise to determine the appearance of lighting flame in the combustion chamber 34 of fuel-fired burners 20,22.Particularly, when the igniting of electronic controller 76 starting fluid combustion-type burners 20,22, controller 76 can be monitored the output of flame temperature sensor 182, in order to the spark ignition of the air/fuel mixture origin self- electrode 48,50 of guaranteeing to enter burner 20,22.Light in case detected, then control program 750 advances to step 758.Igniting detects point 766 places that are shown among Figure 31.
In step 758, electronic controller 76 reduces the fuel that is supplied to fuel-fired burners 20,22.Like this, electronic controller 76 sprays air and the fuel ratio that fuel quantity in the mixing chamber 146 has increased the air/fuel mixture that is supplied to burner 20,22 by reducing by fuel injector 132,134.For example, in order to reduce the fuel that is supplied to fuel-fired burners 20, electronic controller 76 produces control signal on signal line 136, be used for reducing by fuel injector 132 and spray the fuel quantity of mixing chamber 146, thereby increase air and the fuel ratio that is supplied to the air/fuel mixture of fuel-fired burners 20 via fuel conduit 148.Similarly, in order to reduce the fuel that is supplied to fuel-fired burners 22, electronic controller 76 produces control signal on signal line 138, be used for reducing by fuel injector 134 and spray the fuel quantity of mixing chamber 146, thereby increase air and the fuel ratio that is supplied to the air/fuel mixture of fuel-fired burners 22 via fuel conduit 150.
Electronic controller 76 reduces the parts of assembly 14,16 with these fuel level that reduces operation 20,22 1 time periods of fuel-fired burners in order to the preheating jet-black.Can be between such warming up period based on time (that is, continue a predetermined amount of time) or can be based on sensor (that is, continue wherein one or more sense predetermined temperature until temperature sensor 182,184,186).Arrow 768 with Figure 31 between this warming up period illustrates.In case this time period is gone over (that is, in case system's preheating), then control program 750 advances to step 760.
In step 760, electronic controller 76 makes the fuel ramp type that is supplied to fuel-fired burners 20,22 increase or otherwise increase.For this reason, electronic controller 76 sprays air and the fuel ratio that fuel quantity in the mixing chamber 146 has reduced the air/fuel mixture that is supplied to burner 20,22 by increasing by fuel injector 132,134.For example, in order to have additional supply of to the fuel of fuel-fired burners 20, electronic controller 76 produces control signal on signal line 136, be used for increasing by fuel injector 132 and spray the fuel quantity of mixing chamber 146, thereby reduce air and the fuel ratio that is supplied to the air/fuel mixture of burner 20 via fuel conduit 148.Similarly, in order to have additional supply of to the fuel of fuel-fired burners 22, electronic controller 76 produces control signal on signal line 138, be used for increasing by fuel injector 134 and spray the fuel quantity of mixing chamber 146, thereby reduce air and the fuel ratio that is supplied to the air/fuel mixture of burner 22 via fuel conduit 150.
In step 760, being supplied to the slope that the fuel of fuel-fired burners 20,22 can be scheduled to increases.For example, shown in arrow 770 diagrams of Figure 31, the slope that fuel level can be scheduled to is increased to specific intended fuel level gradually, shown in the point 772 of Figure 31.Such intended fuel level can be corresponding with desired regeneration temperature.In case fuel level ramp type rises, then control program 750 advances to step 762.
In step 762, controller 76 is regulated and is supplied to the fuel level of fuel-fired burners 20,22 so that filter regeneration.Particularly, about Fig. 9 and 10 described, in the filter regeneration cycle process, the fuel of burner 20,22 is supplied with and is regulated by closed-loop control as above-mentioned.The closed-loop adjustment that the fuel of such burner 20,22 is supplied with is shown in the indicated zone of the arrow 418 of Figure 31 substantially.In case be under the closed-loop control, then start-up control program 750 finishes.
Referring now to Figure 32, another start-up control program 780 that is used for starting fluid combustion-type burner 20,22 when regeneration cycle begins is shown.This program is with step 782 beginning, and in the step 782, this program 780 determines whether to carry out the request (being burner startup request) of starting fluid combustion-type burner 20,22.Should be appreciated that burner startup request can take a number of different forms, for example comprise that the indication in response to the regeneration of one of institute's sensing, regularly or otherwise definite particulate filter 24,26 needs produces the startup request by software control procedure.For example, can utilize sensor-based pattern, produce based on the pattern of mapping or based on regularly pattern and to start request.Thus, in step 782,, then produce control signal and program 780 advances to step 784 if control program 780 detects burner startup request.If control program 780 does not detect burner startup request, then program 780 loops back the monitoring that step 782 continues on for such request.
In step 784, controller 76 was given the electrode assemblie energising of the fuel-fired burners 20,22 that will regenerate before fuel is supplied to burner.Particularly, in the start-up course of fuel-fired burners 20, before fuel was supplied to burner 20,170 beginnings of controller 76 operating point firearms produced spark between the electrode 48,50 of burner 20.Under the situation of starting fluid combustion-type burner 22, before fuel was supplied to burner 22,172 beginnings of electronic controller 76 operating point firearms produced spark between the electrode 48,50 of burner 22.
Controller 76 was continuously the electrode assemblie energising preset time section of fuel-fired burners 20,22 before fuel is introduced burner.The duration of such time period can be configured to the needs of the system's design that meets appointment.Specifically, had been found that before fuel is introduced and cleaned dirt surface on the electrode 48,50 (that is, having removed jet-black or other materials of accumulating thereon) for electrode assemblie energising preset time section.Thus, can be before introducing fuel remove any material (for example jet-black, diesel fuel, water, wet goods) that is accumulated on the electrode 48,50, thereby strengthened the operation of fuel-fired burners 20,22 from electrode.In case over and done with this preset time section, then control program 780 advances to step 786.
In step 786, electronic controller 76 is to fuel-fired burners 20,22 fuel supplying and air, in order to regenerate particulate filters 24,26 in the above described manner.Particularly, air/fuel mixture is supplied to fuel-fired burners 20,22, at this place, under the situation of the combustion air that exists control module 18 to be supplied, this mixture is by the spark ignition between the electrode 48,50.The hot regenerate particulate filters 24,26 that fuel combustion produced.
Should be appreciated that if desired, control program 750,780 can combine.For example, electrode assemblie can be used to light (described in the step 754 of control program 750) switch on before a time period (described in step 784 of control program 780) introducing fuel.
Referring now to Figure 15 and 16, the control program 400 that is used for closing in regeneration cycle process fuel-fired burners 20,22 is shown.Control program is with step 402 beginning, and in the step 402, electronic controller 76 is supplied to fuel-fired burners 20,22 with fuel and air, in order to regenerate particulate filters 24,26 in the above described manner.Particularly, air/fuel mixture is supplied to fuel-fired burners 20,22, at this place, under the situation of the combustion air that exists control module 18 to be supplied, this mixture is by the spark ignition between the electrode 48,50.As about Fig. 9 and 10 described, in such filter regeneration cycle process, the fuel of burner 20,22 is supplied with and is regulated by closed-loop control.The closed-loop adjustment that the fuel of such burner 20,22 is supplied with is shown in the indicated zone of the arrow 418 of Figure 16 substantially.
In the filter regeneration cycle process, control program 400 determines whether to carry out the request (that is burner shutdown request) of closing fuel-fired burners 20,22 in step 404.Should be appreciated that, burner shutdown request can take a number of different forms, for example comprise in response to particulate filter 20,22 institute's sensing, regularly or that otherwise determine and having regenerated or filter regeneration just produces turn-off request keeping (as mentioned above) certainly by software control procedure, the automatic turn-off request that produces by software control procedure or analog, regularly turn-off request or arbitrarily other manually, the turn-off request of software or hardware driving.In specific embodiment, burner shutdown request can be transferred to the closed position from the enable possition and produce in response to the ignition switch (ignition key) of the engine 80 that is associated with truck 12.Thus, in step 404,, then produce control signal and program 400 advances to step 406 if control program 400 detects burner shutdown request.Turn-off request detect point 420 places that are illustrated in Figure 16.If control program 400 does not detect burner shutdown request, then program 400 loops back step 402 and continues filter regeneration cycle.
In step 406, electronic controller 76 reduces the fuel that is supplied to fuel-fired burners 20,22.For this reason, electronic controller 76 sprays air and the fuel ratio that fuel quantity in the mixing chamber 146 has increased the air/fuel mixture that is supplied to burner 20,22 by reducing by fuel injector 132,134.For example, in order to reduce the fuel that is supplied to fuel-fired burners 20, electronic controller 76 produces control signal on signal line 136, be used for reducing by fuel injector 132 and spray the fuel quantity of mixing chamber 146, thereby increase air and the fuel ratio that is supplied to the air/fuel mixture of burner 20 via fuel conduit 148.Similarly, in order to reduce the fuel that is supplied to fuel-fired burners 22, electronic controller 76 produces control signal on signal line 138, be used for reducing by fuel injector 134 and spray the fuel quantity of mixing chamber 146, thereby increase air and the fuel ratio that is supplied to the air/fuel mixture of fuel-fired burners 22 via fuel conduit 150.
Electronic controller 76 is with these fuel level that reduces operation fuel-fired burners 20,22 1 predetermined amount of time.The arrow 422 of such time period with Figure 16 illustrates.In case this predetermined amount of time is gone over, then control program advances to step 408.
In step 408, cut off fuel supply to burner 20,22.Particularly, electronic controller 76 fuel transmission components 120 of stopping using, thus stop fuel supply to burner 20,22.In order to cut off the fuel supply to fuel-fired burners 20, electronic controller 76 cuts out fuel enable valve 140 and stops on the signal line 136 and produces control signal, thereby makes fuel injector 132 stop burner oil in mixing chamber 146.In case the fuel that remains in the fuel conduit 148 is consumed by burner 20, does not just have extra fuel to enter the fuel inlet nozzle 54 of burner 20.Similarly, in order to cut off the fuel supply to fuel-fired burners 22, electronic controller 76 cuts out fuel enable valve 140 and stops on the signal line 138 and produces control signal, thereby makes fuel injector 134 stop burner oil in mixing chamber 146.In case the fuel that remains in the fuel conduit 150 is consumed by burner 22, does not just have extra fuel to enter the fuel inlet nozzle 54 of burner 22.
In step 408, electronic controller 76 keeps to burner 20,22 supply combustion air and atomizing airs, the also operation of holding point firearm 170,172.Particularly, under the situation that fuel-fired burners 20 is closed, even no longer to burner 20 fuel supplying, electronic controller 76 still continues to continue the supply atomizing air to burner 20 supply combustion airs and via fuel conduit 148 via air pipe line 58.Controller 76 continues operating point firearm 170 and continues to produce spark in the combustion chamber 34 of burner 20.Under the situation that fuel-fired burners 22 is closed, even no longer to burner 22 fuel supplying, electronic controller 76 still continues to continue the supply atomizing air to burner 22 supply combustion airs and via fuel conduit 150 via air pipe line 58.Controller 76 continues operating point firearm 172 and continues to produce spark in the combustion chamber 34 of burner 22.Continuous air supply like this and spark produce has guaranteed the residual fuel in the system by burner 20,22 burnings, thereby reduces the discharging of---if not elimination---unburned hydrocarbon.
Electronic controller 76 continues supply combustion airs and atomizing air and operating point firearm preset time section as mentioned above.Such time period illustrates with the arrow among Figure 16 424.In case crossed this preset time section, then control program advances to step 410.
In step 410, the combustion-supporting air flow that electronic controller 76 cuts off to fuel-fired burners 20,22.Particularly, electronic controller 76 stops the operation of motor 92, thereby stops the operation of air pump 90.After closing air pump 90, electronic controller 76 continues the supply atomizing air and continues operating point firearm one preset time section as mentioned above.In case crossed this preset time section, then control program advances to step 412.
In step 412, the flow of atomization air that electronic controller 76 cuts off to fuel-fired burners 20,22.Particularly, electronic controller 76 cuts out atomization air valve 156, thereby has reduced to flow to the air stream of mixing chamber 146 and burner 20,22.It is pointed out that pure air valve 154 stays open, thus, the pure air stream that has reduced continues in the mixing chamber 146 and is supplied to fuel-fired burners 20,22 thus.As mentioned above, pure air stream from pure air valve 154 is supplied to mixing chamber 146 usually consistently in the operating process of the engine 80 of truck 12, in order to prevent the accumulation of residue (for example black smoke) in the fuel inlet nozzle 54 of fuel-fired burners 20,22.
In step 412, electronic controller 76 stops the generation of the spark in the combustion chamber 34 of fuel-fired burners 20,22.Particularly, the operation of electronic controller 76 halt firearms 170 (under the situation of burner 20) and igniter 172 (under the situation of burner 172), thus 52 of electrode gaps that stop at the electrode 48,50 of fuel-fired burners 20,22 produce spark.Then, control program 400 finishes.
As mentioned above, in the implementation of closing control program 400 (also together with other times), electronic controller 76 is arranged to one of fuel-fired burners 20,22 supply combustion air but not to the situation of its either party's fuel supplying.Similarly, as described above, motor 92 driving fuel pumps 122 and air pump 90 the two.Therefore, when motor 92 drove air pump 90 supply combustion airs, petrolift 122 also was driven.To fuel-fired burners 20,22 supply combustion airs but not during the situation of its either party's fuel supplying, return truck fuel tank 124 through fuel return pipeline 142 at electronic controller 76 by the fuel of petrolift 122 pumpings.As shown in Figure 8, the fuel pressure in the fuel pressure sensor 426 sensing fuel return pipelines 142.The output of fuel pressure sensor 426 is communicated to electronic controller 76 via signal line 428.Make fuel can not flow back to fuel tank 124 easily if fuel return pipeline 142 is confined to, then the pressure on the seal of petrolift 122 may increase, thereby may need pump 122 needed for repair and replacement.
As shown in figure 17, electronic controller 76 execution control procedures 450 are monitored and are returned fuel conduit 142.Control program 450 begins with step 452, in the step 452, and the fuel pressure that electronic controller 76 is determined in the fuel return pipelines 142.Particularly, electronic controller 76 scans or reads signal line 428 to obtain the output from fuel pressure sensor 426.Then, control program 450 advances to step 454.
In step 454, electronic controller 76 determines whether the fuel pressure of institute's sensing is higher than predetermined upper pressure limit.If fuel pressure is lower than upper pressure limit, control program 450 loops back step 452 and the output of continuation monitoring fuel pressure sensor 426.But if fuel pressure is higher than control limit, then control program 450 advances to step 456.
In step 456, electronic controller 76 cuts out the parts that are associated with control module 18.Specifically, because electronic controller 76 draws the conclusion that fuel pressure in the fuel return pipeline 142 is higher than control limit in step 454,, thereby stop the operation of petrolift 122 so controller 76 stops the operation of drive motors 92.Then, control program 450 advances to step 458.
In step 458, electronic controller 76 produces rub-out signal.For example, electronic controller 76 can produce an output signal, and operator (for example driver of truck 12) is presented in the alarm that this output signal causes producing vision, the sense of hearing or other types.Selectively, this rub-out signal can only cause using information updating electronic diary or the analog relevant with the fuel pressure analysis of step 452-456.Should be appreciated that the rub-out signal that produces in the step 458 can be configured to the warning of any type or error tracking device and uses the demand that designs with the system that meets appointment.In addition, as so being equipped with at electronic controller 76, then rub-out signal (or the follow-up signal that generates in response to rub-out signal) can be communicated to control unit of engine 78 via CAN interface 314.Be equipped with this information, control unit of engine 78 can be programmed carry out other analysis, to truck operator produce rub-out signal (for example the indicator on the truck instrument board is lighted) that indication control module 18 closed or error message is stored in can error log by maintenance personnel's visit in.The finishing control program 450 then.
Refer again to Fig. 8, control module 18 can be equipped with the sensor that is occurred by one or more specific environment situations that are used for detecting the internal chamber 112 of control housing 72.For example, control module 18 can be configured to and comprises smoke detectors 460.The output of smoke detectors 460 is communicated to electronic controller 76 via signal line 462.So the place in greater detail, smoke detectors 460 can be used for detecting the fuel particle in the internal chamber 112 of control housing 72 or the appearance of flue dust.There are fuel particle or flue dust if detect, but shutdown system and produce rub-out signal.Smoke detectors 460 can be implemented as the smoke detectors of any type.In the illustrative embodiments of described herein control module 18, smoke detectors 460 is to realize such as commercially available unionized type smoke detectors such as IR detector.
As shown in figure 18, electronic controller 76 executive control programs 500 monitor control housing 72 internal chamber 112 in fuel particle or the appearance of flue dust.Control program 500 is with step 502 beginning, and in the step 502, electronic controller 76 scans or read signal line 462 to obtain output from smoke detectors 460.In case controller 76 obtains output from smoke detectors 460, then control program 500 advances to step 504.
In step 504, whether the output of electronic controller 76 definite smoke detectors 460 shows in the internal chamber 112 of controlling housing 72 exists fuel particle or flue dust.Fuel particle or flue dust do not occur if the output of smoke detectors 460 shows in the internal chamber 112 of controlling housing 72, then control program 500 loops back the output that step 502 continues monitoring detector 460.But, fuel particle or flue dust appear if the output of smoke detectors 460 shows in the internal chamber 112 of controlling housing 72, then produce control signal and control program 500 advances to step 506.
In step 506, electronic controller 76 cuts out the parts that are associated with control module 18.Specifically; because drawing the output of smoke detectors 460 in step 454, electronic controller 76 shows the conclusion that occurs fuel particle or flue dust in the internal chamber 112 of controlling housing 72; so controller 76 stops the operation of drive motors 92, thereby stop the operation of petrolift 122 and air pump 90.Then, control program 500 advances to step 508.
In step 508, electronic controller 76 produces rub-out signal.For example, electronic controller 76 can produce an output signal, and operator (for example driver of truck 12) is presented in the alarm that this output signal causes producing vision, the sense of hearing or other types.Selectively, this rub-out signal can only cause using information updating electronic diary or the analog relevant with the analysis of step 502 and 504.Should be appreciated that the rub-out signal that produces in the step 508 can be configured to the warning of any type or error tracking device and uses the demand that designs with the system that meets appointment.In addition, as so being equipped with at electronic controller 76, then rub-out signal (or the follow-up signal that generates in response to rub-out signal) can be communicated to control unit of engine 78 via CAN interface 314.Be equipped with this information, control unit of engine 78 can be programmed carry out other analysis, to truck operator produce rub-out signal (for example the indicator on the truck instrument board is lighted) that indication control module 18 closed or error message is stored in can error log by maintenance personnel's visit in.The finishing control program 500 then.
As shown in Figure 8, control module 18 can be equipped with the sensor that is occurred by one or more specific environment situations that are used for detecting the internal chamber 112 of control housing 72.For example, control module can be configured to and comprises temperature sensor 510.The output of temperature sensor 510 is communicated to electronic controller 76 via signal line 512.As institute hereinafter in greater detail, temperature sensor 510 can be used for detecting the temperature in the internal chamber 112 of control housing 72.If the temperature in the internal chamber 112 of control housing 72 surpasses predetermined last temperature limit (for example 125 degrees centigrade), but shutdown system and produce rub-out signal.Temperature sensor 510 can be implemented as the electronic temperature transmitter of any type.In the illustrative embodiments of described herein control module 18, temperature sensor 510 is to realize such as commercially available thermocouple.
As shown in figure 19, electronic controller 76 executive control programs 550 are monitored the temperature in the internal chamber 112 of controlling housing 72.Control program 550 is with step 552 beginning, and in the step 552, electronic controller 76 scans or read signal line 512 to obtain output from temperature sensor 510.In case controller 76 obtains output from temperature sensor 510, then control program 550 advances to step 554.
In step 554, whether the temperature in the internal chamber 112 of electronic controller 76 definite control housings 72 that sensed is higher than predetermined last temperature limit (for example 125 degrees centigrade).Go up temperature limit if the temperature in the internal chamber 112 of control housing 72 is lower than, then control program 550 loops back the output that step 552 continues monitoring temperature sensor 510.But,, then produce control signal and control program 550 advances to step 556 if the temperature in the internal chamber 112 of control housing 72 is higher than control limit.
In step 556, electronic controller 76 cuts out the parts that are associated with control module 18.Specifically, because the temperature that electronic controller 76 draws in step 554 in the internal chamber 112 of control housing 72 is higher than the conclusion of control limit, so controller 76 stops the operation of drive motors 92, thereby stop the operation of petrolift 122 and air pump 90.Then, control program 550 advances to step 558.
In step 558, electronic controller 76 produces rub-out signal.For example, electronic controller 76 can produce an output signal, and operator (for example driver of truck 12) is presented in the alarm that this output signal causes producing vision, the sense of hearing or other types.Selectively, this rub-out signal can only cause using information updating electronic diary or the analog relevant with the temperature analysis of step 552 and 554.Should be appreciated that the rub-out signal that produces in the step 558 can be configured to the warning of any type or error tracking device and uses the demand that designs with the system that meets appointment.In addition, if electronic controller 76 so is equipped with, then rub-out signal (or the follow-up signal that generates in response to rub-out signal) can be communicated to control unit of engine 78 via CAN interface 314.Be equipped with this information, control unit of engine 78 can be programmed carry out other analysis, to truck operator produce rub-out signal (for example the indicator on the truck instrument board is lighted) that indication control module 18 closed or error message is stored in can error log by maintenance personnel's visit in.The finishing control program 550 then.
Referring now to Figure 20, emission abatement assembly 600 is shown.Emission abatement assembly 600 comprises the parts that a plurality of and emission abatement assembly 10 are general.Utilize common reference number to indicate the universal component of two inter-modules.
Emission abatement assembly 600 comprises controller 76, be in fuel supply unit and fuel-fired burners 606 such as petrolift 122 under the control of controller 76.This assembly 600 can be flatly, be installed in the truck 12 vertically or vertically with being inverted.Diesel oxidation catalyst 608 can be positioned at the upstream of filter base 60 alternatively, as shown in figure 20.Diesel oxidation catalyst 608 (or oxidation catalyst of any other form) can be used for any unburned hydrocarbon of oxidation or carbon monoxide (CO), thereby produces the extra heat in the downstream that is passed to filter base 60.Selectively, as shown in figure 21, emission abatement assembly 600 can not dispose diesel oxidation catalyst 608.
As mentioned above, filter base 60 can be injected with catalysis material, such as for example precious metal catalyst material.For example, catalysis material can be with platinum, rhodium, palladium, comprise that the similar catalysis material of its bond and any other realizes.Use catalysis material to reduce and light the required temperature of collected soot particles.
Different with assembly 10, herein in the described illustrative embodiments, emission abatement assembly 600 does not utilize from the additional air such as the air pump pumping of air pump 90.Thus, combustion process is by the oxygen support in the waste gas.
Fuel-fired burners 606 is shown in further detail in Figure 22 and 23.Hot waste gas enters housing 610 by exhaust gas entrance 612.Should be mentioned that enter differently by the inlet 36 perpendicular to the flow direction by its housing with waste gas in the assembly 10, exhaust gas entrance 612 is basic coaxial with flowing to of housing 610.Thus, the gas access 612 of housing 610 and gas vent 614 are provided with (as Figure 20 and 21) along the same general axis.
The waste gas that enters housing 610 is divided into two streams.Inner stream 616 enters chamber 618, flows into combustion chamber 620 through a plurality of holes 622,624 then.Arrange and be shown in Figure 24 and 25 in the hole in hole 622,624.This hole arrange be configured so that to flow through hole 622 waste gas in the combustion chamber 620 inside vortex, be beneficial to fuel, waste gas and the mixing of combustion gases of being sprayed thus.Can utilize a row or multi-row hole 622 to produce desirable flow/swirl.Shown in Figure 24 and 25, also can limit a plurality of holes 626 in the upstream wall 628 of combustion chamber 620, so that part waste gas stream can enter chamber 620 under the situation of at first not advancing by chamber 618.
The end of electrode 48,50 is positioned over the downstream of nozzle 54, in order to there to be fire fuel under the situation of waste gas.Waste gas comprises the oxygen of 4%-20%, and oxygen is beneficial to the burning of fuel.Waste gas by hole 624 mixes with the hot combustion gas that may comprise unburned fuel, hydrocarbon, CO and other fuel gas.Exist in waste gas under the situation of oxygen, these gases further burn.Waste gas stream flows through many holes 630, thereby walks around fuel-fired burners 606.This waste gas stream the outer oxygen of amount supplied, be used to leave the burning of the burning gases of internal combustion chamber 620.
Flame stand 632 is placed on the downstream, combustion zone, (or does not have filter base 60 in the configuration of diesel oxidation catalyst, as shown in figure 21) in order to stop flame to arrive diesel oxidation catalyst 608.Gas distributor 634 can be positioned on the downstream of combustion zone, so that help heat of mixing burning gases and waste gas is walked around fuel-fired burners 606, strengthens the Temperature Distribution of the inlet that strides across diesel oxidation catalyst 608 and/or filter base 60 thus.Distributor 634 can be around the combustion chamber 620 part wall location, as shown in figure 22.The exemplary design of the gas distributor 634 that can locate in this way is shown among Figure 26.Selectively, as shown in figure 27, gas distributor 634 can be positioned on the downstream of the outlet of combustion chamber 620.The exemplary design of the gas distributor 634 that can locate in this way is shown among Figure 28.
Referring now to Figure 27, illustrate in greater detail another exemplary design of fuel-fired burners.In this embodiment, arrange and are similar to hole shown in Figure 24 and arrange in some waste gas hole 622 of flowing through, the hole in this hole 622, thereby form the gas swirl in the internal combustion chamber.The thermal-flame that comprises unburned fuel, hydrocarbon, CO and other fuel gas in the assembly of Figure 27 with respect to the further downstream part burning of the assembly of Figure 22.
As shown in figure 27, other flame stand 636 can be positioned between flame stand 632 and the fuel-fired burners 606.Flame stand 636 can be designed to recessed configuration or the convex configuration that is designed to shown in dotted line shown in solid line.
Also can expect other variants of the exemplary design of emission abatement assembly described herein.For example, as mentioned above, air pump 90 can be implemented as any type air pump that comprises high relatively flowing/high efficiency air pump.Also can use the variable air flow pump that under high engine load conditions, increases output.Selectively, also can use the variable air flow pump of only under high engine load conditions, operating.Pump 90 can be realized with centrifugal compressor or Roots blower.
The size that also can change combustion chamber 34,620 is to satisfy the needs of appointing system design.For example, can use relatively big (16 " diameter) thus combustion chamber 34,620 come slow exhaust gas velocity to strengthen the efficiency of combustion of fuel-fired burners.Also can use relatively mild/effectively air flow configurations---" axially " shown in Figure 20 and 21 disposes the flow behavior that strengthens given design.
If desired, also can change fuel and spray the into mode of fuel-fired burners 20,22,606.For example, the mode that can use segmentation fuel to spray, wherein first fuel quantity sprays into burner, to form initial flame.Then, use initial flame to light second fuel quantity that is sprayed.
Also can utilize the surface area that increases fuel spray through the fuel type of flow of adjustment.For example, can use the fuel average of shake, the wherein fuel quantity that is sprayed shake around desirable average fuel amount.For example, the burner oil rate can be shaken between 25% and 75%, to produce 50% average fuel rate.
Also can control engine 80 with and the operation of associated components, be beneficial to the operation of emission abatement assembly described herein.For example, under the operational circumstances of the emission abatement assembly that utilize not to replenish air (for example Figure 20 and 21 assembly), the position of the EGR valve of engine 80 can be consistent with the regeneration of particulate filter.For example, for temperature and the oxygen content that increases waste gas, the EGR valve of engine can of short durationly cut out.Can suspect, filter regeneration may need about ten minutes.In this short time period, can close the EGR valve.In the case, the regeneration of filter can be consistent with race of engine situation.
In another embodiment, can control engine 80 and make that in fact the EGR level is increased in the filter regeneration process.In the case, the flame that can utilize fuel or fuel additive such as hydrogen etc. to come steady fuel combustion-type burner.Hydrogen can be by air accumulator or the supply of airborne fuel reburner.
Along similar pipeline, but the operation of monitoring engine 80 and the parts that are associated is beneficial to the operation of emission abatement assembly described herein.For example, at the emission abatement assembly that does not utilize additional air (promptly, under the situation of the operation no air burner of Figure 20 and 21 assembly for example), but the operation of monitoring engine makes that for example the regeneration of filter takes place under desired, predetermined power operation situation.For example, under the situation of the emission abatement assembly that utilize not to replenish air (for example Figure 20 and 21 assembly), wish under existence contains the situation of waste gas of high relatively oxygen concentration, to carry out the regeneration of filter.Usually, this is that engine 80 is in the situation when hanging down load situation, such as when engine 80 is operated down in the idle running situation or near idle running situation (for example 600-1000RPM depends on engine).
As described in more detail below, there is multiple mode to determine when and has desired, predetermined engine condition for the filter regeneration that does not utilize the emission abatement assembly that replenishes air.For example, can utilize predetermined engine speed range, in this case, the regeneration of filter is only carried out when engine is operated in predetermined engine speed range.In the case, but engine speed is determined in the output of controller 76 monitoring engine velocity sensors 890 (as Fig. 8) or similar device.Should be appreciated that controller can directly be communicated by letter with engine speed sensor 890, or can obtain the output of sensor 890 from control unit of engine 78 via CAN interface 314.
In addition, can utilize predetermined engine load range to determine when and have desired, predetermined engine condition for the filter regeneration that does not utilize the emission abatement assembly that replenishes air.Carry out when in this case, the regeneration of filter is only operated in engine is in predetermined engine load range.For this reason, controller 76 is sensing or otherwise determine certain engine parameters (for example RPM, turbocharging etc.) at first, then inquiry or otherwise obtain the engine load map of pre-programmed and determine load on the engine.Should be appreciated that controller 76 can carry out pre-programmed with such engine load map, or can obtain engine load via the engine load map of CAN interface 314 from be programmed in control unit of engine 78.
In addition, can use the discharge mass flow of engine to determine when and have desired, predetermined engine condition for the filter regeneration that does not utilize the emission abatement assembly that replenishes air.For example, can utilize predetermined discharge mass flow scope, in this case, carry out when the regeneration of filter is only operated in engine is in predetermined discharge mass flow scope.In the case, controller 76 can be monitored such as the output of the mass flow sensor 892 (as Fig. 8) of heated filament mass flow sensor etc. and determine to discharge mass flow.Should be appreciated that controller 76 can directly be communicated by letter with discharging mass flow sensor 892, or can obtain the output of sensor 892 from control unit of engine 78 via CAN interface 314.Selectively, discharging mass flow can utilize such as engine RPM, turbo boost pressure and enter collector temperature (together with other known parameters such as engine displacement etc.) and calculated by controller 76 in a usual manner.Should be appreciated that, but controller 76 calculated mass flows itself, or it can obtain the mass flow calculated via CAN interface 314 from control unit of engine 78.
Referring now to Figure 33, the control program 850 of the regeneration that is used to control the emission abatement assembly (that is no air emission abatement assembly) that does not utilize additional air is shown.Program 850 is with step 852 beginning, and in the step 852, this program determines whether to carry out the request (being burner startup request) that starts no air fuel combustion-type burner 20,22.Should be appreciated that, burner startup request can take a number of different forms, and for example comprises by producing the startup request in response to the indication of one of institute's sensing, regularly or otherwise definite particulate filter 24,26 needs regeneration by software control procedure.For example, can utilize sensor-based pattern, produce based on the pattern of mapping or based on regularly pattern and to start request.Thus, in step 852,, then produce control signal and program 850 advances to step 854 if control program 850 detects burner startup request.If control program 850 does not detect burner startup request, then program 850 loops back the monitoring that step 852 continues on for such request.
In step 854, controller 76 determines whether engine 80 is operated in predetermined engine condition.For example, if utilize predetermined engine speed range, wherein, when only operating in engine is in predetermined engine speed range, the regeneration of filter carries out, then the output of controller 76 monitoring engine velocity sensors 890 or otherwise definite engine speed.After this, controller 76 determines that these engine speeds are whether in predetermined velocity interval.Selectively, if utilize predetermined engine load range, carry out when the regeneration of filter is only operated in engine is in predetermined engine load range in the case, controller 76 sensings or otherwise determine certain engine parameters (for example RPM, turbocharging etc.) then, inquiry or otherwise obtain the engine load map of pre-programmed and determine load on the engine then.After this, controller 76 determines whether this engine load is in the predetermined engine load range.In addition, if utilize predetermined discharge mass flow scope, the regeneration of filter is in this case only carried out during operation in predetermined discharge mass flow scope at engine, then controller 76 sensings, calculating or otherwise determine the discharge mass flow of engine.After this, controller 76 determines whether this discharge mass flow is in the predetermined discharge mass flow scope.Thereby, in step 854,, in predetermined engine condition, operates by controller 76 if having determined engine 80, and then control program 850 advances to step 856.But, if having determined engine 80, in predetermined engine condition, do not operate by controller 76, then control program 850 loops back step 854, determines when that to continue monitoring engine it operates in this situation.
In step 856, the regeneration of controller 76 beginning filters.Particularly, electronic controller 76 operation fuel-fired burners 20,22 and with any regenerate particulate filters 24,26 in a plurality of modes described herein.But, should be appreciated that, be not have (that is under, not utilizing) operation fuel-fired burners 20,22 under the auxiliary situation of combustion air such as the situation of supplying from the additional air of air pump 90.Thus, be present in the burning that oxygen in the engine exhaust is kept the fuel that is delivered to fuel-fired burners 20,22.The hot regenerate particulate filters 24,26 that fuel combustion produced.In case finish filter regeneration, then control program 850 finishes.
Should be appreciated that, if desired, also can use control program 850 to come regeneration filter by auxiliary additional air.Be also to be understood that can with the regeneration of filter in addition lack the mode that takes place under the situation that starts request control program 850 made amendment.For example, controller 76 can be configured to regenerate particulate filters 24,26 one or both of when engine 80 is operated under predetermined operating conditions, and does not consider whether filter 24,26 is loaded into predetermined threshold.In this way, controller 76 can utilize the oxygen enrichment situation of any time that exists in combustion gas.
Referring now to Figure 35, another illustrative embodiments of emission abatement assembly 800 is shown.Assembly 800 comprises nozzle 802, and this nozzle extends to discharges in the conduit, in order to inject fuel in the waste gas stream.Electrode 48,50 is roughly vertically to arrange location (being observed by the accompanying drawing direction).
Can multiple position comparative electrode 48,50 location flame stands 636.For example, as shown in figure 35, flame stand 636 can be positioned on the downstream of nozzle 802 but is positioned at the upstream of electrode 48,50.Selectively, flame stand 636 can be positioned on the downstream of nozzle 802 and electrode 48,50.In addition, flame stand 632 can be designed to recessed configuration (as shown in figure 35) or protrude configuration (not shown).
Fluidic distributor 644 can be positioned on the upstream of diesel oxidation catalyst 608 and/or filter base 60, so that mix hot combustion gas and all the other waste gas, strengthen the Temperature Distribution of the inlet of striding diesel oxidation catalyst 608 and/or filter base 60 thus near the combustion zone of nozzle 802.Fluidic distributor 644 can be implemented as the fluidic distributor of any type.In exemplary embodiment, fluidic distributor 644 can be realized by arbitrary above-mentioned fluidic distributor 634.
Referring now to Figure 36, another illustrative embodiments of fuel-fired burners 20,22 is shown.The embodiment and the aforementioned embodiments that are shown in Figure 36 are similar, and make and be denoted by like references like.Fuel-fired burners 20,22 is revised, to reduce waste gas stream by combustion chamber 34.Have been found that such modification (perhaps significantly) has reduced escaping of hydrocarbon and carbon monoxide, also reduced other dischargings simultaneously.
In essence, the waste gas stream that enters by exhaust gas entrance 36 is divided into two streams, and one of them advances by combustion chamber 34 (that is, combustion flow), and another walks around combustion chamber 34 (that is, streaming).Thus, the waste gas of the combustion chamber 34 of the fuel-fired burners 20,22 by Figure 36 stream relatively for example the burner of Fig. 5 reduced.Like this, walk around and increase to some extent the design of the relative Fig. 5 of percentage of waste gas stream of combustion chamber 34 (that is, advancing) by the opening 42 of cover cap 44.
As will be described in more detail below, the design of fuel combustion chamber 34 can change the waste gas that comes flowing through wherein and controls (that is, control is by the speed and the direction of the waste gas stream of combustion chamber).In addition, also can use such as the parts of flow distribution plate (diverter plate) etc. and control waste gas stream in this way.
An illustrative embodiments controlling the waste gas stream by fuel-fired burners 20,22 in this way is shown among Figure 36.In the case, combustion chamber 34 comprises the outer wall 902 of big circular ring type, and this outer wall has two half parts 904,906.The first half part 904 is exhaust gas entrance 36 dorsad, and the second half part 906 is towards exhaust gas entrance 36.As shown in figure 36, be limited with a plurality of gas accesses opening 40 in the first half part 904.The collective surface areas of the gas access opening 40 of the first half part 904 limits first dummy section, and the collective surface areas of the gas access opening of the second half part 906 limits second dummy section.Second dummy section of second half part is littler than first dummy section of first half part.Thus, with respect to the design of the fuel-fired burners of for example Fig. 5, the waste gas that exhaust gas entrance 36 enters fuel-fired burners 20,22 that passes through of minimizing partly flows into combustion chamber 34.Like this, the design of Fig. 5 relatively, the amount of combustion flow (that is, entering the waste gas stream of combustion chamber 34) reduces to some extent.Should be appreciated that such configuration has not only reduced the exhausted air quantity that enters combustion chamber 34, also reduced the speed (for example with respect to Fig. 5 design) of the waste gas that enters combustion chamber 34.In addition, such configuration has also reduced the waste gas stream that exhaust gas entrance 36 enters fuel-fired burners 20,22 that passes through that flows directly into combustion chamber 34 (that is, by half part 906) and impinge upon wherein thus on the flame that is produced.
Referring now to Figure 37, another embodiment of fuel-fired burners 20,22 is shown, wherein, the second half part 906 of combustion chamber 34 does not have gas access opening 40 substantially.For example, the collective surface areas of the gas access opening of the second half part 906 is defined to be zero dummy section.Like this, enter the direct flow into combustor 34 of waste gas of fuel-fired burners 20,22 by exhaust gas entrance 36, so do not impinge upon on the flame that produces in the combustion chamber.But the combustion flow of waste gas enters combustion chamber 34 by the gas access opening 40 in the first half part 904 (that is, not facing the surface of exhaust gas entrance 36) that is formed on combustion chamber 34.Surplus (balance) entering the waste gas stream of exhaust gas entrance 36 walks around combustion chamber 34.
Should be appreciated that the size of the gas access opening 40 on half part 904,906 either party and position can be configured to and produce any required flow behavior (for example speed and direction) in combustion chamber 34.
Although the ratio of the stream of being divided (that is, combustion flow and stream) is formed in the function of the gas access opening 40 in the outer wall 902 of combustion chamber 34 as mentioned above, the waste gas stream that enters exhaust gas entrance 36 can otherwise be divided.For example, plate or " small pieces " can be fixed to combustion chamber 34, in order to the gas access opening 40 in the combustion chamber 34 of may being present in of block any number.The example of such plate 912 is shown in Figure 44.Plate 912 can be around outer wall 902 location of the combustion chamber 34 of for example burner design shown in Figure 5.Formed seam 918 was in the face of exhaust gas entrance 36 when two ends 914 of plate 912 were fixed together.As shown in figure 45, when plate 912 was installed in this way, the flow of exhaust gases impinges that enters exhaust gas entrance 36 did not have on the zone (illustrating with shadow region 916 generally) in hole at plate 912, thereby stoped waste gas to flow on the flame that directly strikes in the combustion chamber 34.
By the waste gas stream of control by combustion chamber 34, the stability of fuel-fired burners 20,22 flames that produced can be strengthened.In fact, have been found that, keep stable flame easilier when the speed of flame during greater than the speed of the waste gas that moves through combustion chamber 34.On the contrary, when the speed of the waste gas that moves through combustion chamber 34 during, can cause the unstability of flame greater than flame speed.
As noted above, but size, quantity and the position of predetermined gas inlet opening 40, to produce desirable stream by the combustion chamber.In an exemplary embodiment, fuel-fired burners 20,22 is configured so that about 70% 36 waste gas that enter that enter the mouth of passing through advance by combustion chamber 34 (the surplus portion of waste gas walks around combustion chamber 34).In another illustrative embodiments, fuel-fired burners 20,22 is configured so that 36 waste gas that enter that enter the mouth of passing through of about 50%-70% advance by combustion chamber 34 (the surplus portion of waste gas walks around combustion chamber 34).In another illustrative embodiments, fuel-fired burners 20,22 is configured so that to be lower than 50% 36 waste gas that enter that enter the mouth of passing through and advances by combustion chamber 34 (the surplus portion of waste gas walks around combustion chamber 34).Can expect that these exemplary spreading spreading outside putting put.
As noted above, instead or additionally, remove the gas access opening 40 on the outer wall 902 of fuel chambers 34, enter the waste gas stream of gas access 36 and can various different modes be divided into desirable combustion flow and stream.For example, can use a plurality of flow distribution plates that fuel chambers 34 is passed through in the waste gas stream guiding of desired amount, guide the surplus portion of this stream to walk around this fuel chambers simultaneously.The example of such plate 910 but also can be expected other configurations shown in Figure 38-43.Should be appreciated that this plate 910 can be configured to combustion chamber 34 is passed through in the guiding of desirable stream part, prevents that simultaneously the back pressure in the discharge system from increasing.
The size, shape and/or the position that are limited to the opening 42 in the bypass shroud 44 also can change, to produce desirable properties of flow.For example, the size of opening 42, shape and/or position can be configured to " focus " or " cold spot " on the upstream face that adapts to filter base 60.In fact, can on filter base 60, carry out heat analysis, to determine where such focus or cold spot is present in.Then, can change size, shape and/or the position that is limited to the opening 42 in the bypass shroud 44 based on such analysis.
For example, the big I reduction of the opening 42 of cold spot upstream (with respect to waste gas stream).The exhausted air quantity that flows through cold spot by minimizing has increased the temperature on the cold spot in the filter regeneration process like this.
On the contrary, the big I of the opening 42 of focus upstream (with respect to waste gas stream) increases.The exhausted air quantity that flows through focus by increase has reduced the temperature on the focus in the filter regeneration process like this.
Thus, can contemplate structure and comprise the surface temperature of the bypass shroud 44 of the opening 42 that a plurality of differences are big or small with the variation on the upstream face that adapts to filter base 60.
Although show concrete illustrative embodiments by example in the accompanying drawing and detailed description herein, above-mentioned exposure is easy to carry out various modifications and variations.But, should be appreciated that, be not to be intended to above-mentioned exposure is defined in disclosed particular form, but opposite, contained all modifications that falls in principle of the present invention and the scope, be equal to and changed.
Each feature of described from here device, system and method can produce a plurality of advantages of the present invention.It is to be noted that the selectable embodiment of device of the present invention, system and method can not comprise described all features, but still has to the advantage of these features of small part.Those of ordinary skills can easily release its oneself conception in conjunction with the one or more features of the present invention and fall into device, the system and method for principle of the present invention and scope.
For example, should be appreciated that the order of many steps of control program described herein can change.In addition, many steps of control program can be carried out each other side by side.

Claims (19)

1. operate the method that emission abatement assembly is removed the jet-black in the waste gas of explosive motor for one kind, said method comprising the steps of:
Determine whether engine is operated under predetermined operating conditions, and
If engine is operated under this predetermined operating conditions, then operate fuel-fired burners and come regenerate particulate filters.
2. the method for claim 1, wherein:
Described determining step comprises the engine speed of determining engine whether in predetermined scope, and
Described operating procedure comprises: if the engine speed of engine is then operated fuel-fired burners and come regenerate particulate filters in this predetermined scope.
3. method as claimed in claim 2 wherein, determines whether the engine speed of engine is in the output that the interior step of predetermined scope comprises the monitoring engine velocity sensor.
4. the method for claim 1, wherein:
Described determining step comprises the engine load of determining engine whether in predetermined scope, and
Described operating procedure comprises: if the engine load of engine is then operated fuel-fired burners and come regenerate particulate filters in this predetermined scope.
5. method as claimed in claim 4, wherein, the step whether engine load of determining engine is in the predetermined scope comprises the inquiry engine load map.
6. the method for claim 1, wherein:
Described determining step comprises the discharge mass flow of determining engine whether in predetermined scope, and
Described operating procedure comprises: if the discharge mass flow of engine is in this predetermined scope, then operates fuel-fired burners and come regenerate particulate filters.
7. method as claimed in claim 6 wherein, determines whether the discharge mass flow of engine is in the output that the interior step of predetermined scope comprises the quality monitoring flow sensor.
8. method as claimed in claim 6, wherein, whether the discharge mass flow of determining engine is in step in the predetermined scope comprises from the engine operation parameters of institute's sensing and estimates to discharge mass flow.
9. the method for claim 1, wherein: described operating procedure is included in to replenish under the auxiliary situation of air supply operates fuel-fired burners.
10. the method for claim 1, wherein described emission abatement assembly comprises the no air emission abatement assembly with no air burner operation.
11. an emission abatement assembly that is used for removing from the waste gas of explosive motor jet-black, this assembly comprises:
Particulate filter,
Be positioned at the fuel-fired burners of this particulate filter upstream, and
Be configured to control the controller of this fuel-fired burners, this controller comprises (i) processor and the storage device that (ii) electrically is coupled to this processor, the a plurality of instructions of storage in this storage device, when carrying out by described processor, these instructions make described processor:
Determine whether engine is operated under predetermined operating conditions, and
If engine is operated under this predetermined operating conditions, then operate fuel-fired burners and come regenerate particulate filters.
12. emission abatement assembly as claimed in claim 11, wherein, when carrying out by described processor, described a plurality of instructions further make described processor:
The engine speed of determining engine whether in predetermined scope, and
If the engine speed of engine is then operated fuel-fired burners and is come regenerate particulate filters in this predetermined scope.
13. emission abatement assembly as claimed in claim 12, it further comprises engine speed sensor, wherein, when carrying out by described processor, described a plurality of instructions further make described processor monitoring engine velocity sensor output and determine whether the engine speed of engine is in the predetermined scope.
14. emission abatement assembly as claimed in claim 11, wherein, when carrying out by described processor, described a plurality of instructions further make described processor:
The engine load of determining engine whether in predetermined scope, and
If the engine load of engine is then operated fuel-fired burners and is come regenerate particulate filters in this predetermined scope.
15. emission abatement assembly as claimed in claim 11, wherein, when carrying out by described processor, described a plurality of instructions further make described processor inquiry engine load map and determine whether the engine load of engine is in the predetermined scope.
16. emission abatement assembly as claimed in claim 11, wherein, when carrying out by described processor, described a plurality of instructions further make described processor:
The discharge mass flow of determining engine whether in predetermined scope, and
If the discharge mass flow of engine is then operated fuel-fired burners and is come regenerate particulate filters in this predetermined scope.
17. emission abatement assembly as claimed in claim 16, it further comprises mass flow sensor, wherein, when carrying out by described processor, described a plurality of instructions further make described processor monitor the output of described mass flow sensor and determine whether the discharge mass flow of engine is in the predetermined scope.
18. emission abatement assembly as claimed in claim 16, wherein, when carrying out by described processor, described a plurality of instructions further make described processor estimate to discharge mass flow from the engine operation parameters of institute's sensing.
19. emission abatement assembly as claimed in claim 11, wherein, described emission abatement assembly comprises the no air emission abatement assembly with no air burner operation.
CN200580007276.1A 2004-01-13 2005-01-12 Emission abatement assembly and method of operating the same Expired - Fee Related CN1929895B (en)

Applications Claiming Priority (26)

Application Number Priority Date Filing Date Title
US53632704P 2004-01-13 2004-01-13
US60/536,327 2004-01-13
US54613904P 2004-02-20 2004-02-20
US60/546,139 2004-02-20
US10/931,027 2004-08-31
US10/931,026 US20050150218A1 (en) 2004-01-13 2004-08-31 Method and apparatus for determining accumulation in a particulate filter of an emission abatement assembly
US10/931,017 2004-08-31
US10/931,010 US7581389B2 (en) 2004-01-13 2004-08-31 Method and apparatus for monitoring ash accumulation in a particulate filter of an emission abatement assembly
US10/931,025 US7908847B2 (en) 2004-01-13 2004-08-31 Method and apparatus for starting up a fuel-fired burner of an emission abatement assembly
US10/931,017 US20050150215A1 (en) 2004-01-13 2004-08-31 Method and apparatus for operating an airless fuel-fired burner of an emission abatement assembly
US10/931,008 2004-08-31
US10/931,028 2004-08-31
US10/931,010 2004-08-31
US10/931,027 US7685811B2 (en) 2004-01-13 2004-08-31 Method and apparatus for controlling a fuel-fired burner of an emission abatement assembly
US10/931,025 2004-08-31
US10/931,009 2004-08-31
US10/931,092 US7628011B2 (en) 2004-01-13 2004-08-31 Emission abatement assembly and method of operating the same
US10/931,088 2004-08-31
US10/931,091 2004-08-31
US10/931,092 2004-08-31
US10/931,009 US8641411B2 (en) 2004-01-13 2004-08-31 Method and apparatus for directing exhaust gas through a fuel-fired burner of an emission abatement assembly
US10/931,020 2004-08-31
US10/931,090 2004-08-31
US10/931,026 2004-08-31
US10/931,088 US20050150376A1 (en) 2004-01-13 2004-08-31 Method and apparatus for monitoring the components of a control unit of an emission abatement assembly
PCT/US2005/000939 WO2005070175A2 (en) 2004-01-13 2005-01-12 Emission abatement assembly and method of operating the same

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DE102008033096A1 (en) * 2008-07-15 2010-02-11 Uhde Gmbh Method and device for igniting and operating burners in the gasification of carbonaceous fuels
US8549842B2 (en) * 2009-12-01 2013-10-08 GM Global Technology Operations LLC Air assisted injector, and injection system and exhaust treatment system incorporating the same
CN103363532B (en) * 2012-04-01 2016-05-11 林光湧 Waste gas purification burner
GB2506660B (en) * 2012-10-05 2019-06-19 Ford Global Tech Llc Method of regenerating a filter in an exhaust
CN105378245B (en) * 2013-04-11 2018-07-20 珀金斯发动机有限公司 Mixer and emission cleaning module
CN104594991B (en) * 2013-10-30 2017-05-03 乔英电机有限公司 Intelligent type smoke filtering and noise reduction device
CN107091135A (en) * 2017-05-26 2017-08-25 凯龙高科技股份有限公司 Meet the diesel engine premixed combustion device after-treatment system of PM emission controls
CN108952911B (en) * 2018-09-27 2023-06-27 云南菲尔特环保科技股份有限公司 Diesel engine active and passive regenerating device with heat preservation and heat insulation sleeve

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