CN100335756C - 废气清洁设备 - Google Patents
废气清洁设备 Download PDFInfo
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- CN100335756C CN100335756C CNB038012669A CN03801266A CN100335756C CN 100335756 C CN100335756 C CN 100335756C CN B038012669 A CNB038012669 A CN B038012669A CN 03801266 A CN03801266 A CN 03801266A CN 100335756 C CN100335756 C CN 100335756C
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N9/00—Electrical control of exhaust gas treating apparatus
- F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
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- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
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- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/0231—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
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- F01N2250/00—Combinations of different methods of purification
- F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/16—Parameters used for exhaust control or diagnosing said parameters being related to the exhaust apparatus, e.g. particulate filter or catalyst
- F01N2900/1606—Particle filter loading or soot amount
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/14—Direct injection into combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/46—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition
- F02M26/47—Sensors specially adapted for EGR systems for determining the characteristics of gases, e.g. composition the characteristics being temperatures, pressures or flow rates
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/10—Residue burned
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/30—Exhaust treatment
Abstract
在一种废气清洁设备(30)中,其中检测用来收集颗粒的过滤器(32)的前和后压力差(ΔP)用于过滤器的恢复,在过滤器恢复期间,使用第一温度传感器(36)和第二温度传感器(37),过滤器(32)出口部分的温度低于其入口部分温度(ΔT>M)的时间,被确定为过滤器(32)的恢复完成定时。在这一恢复完成时的前和后差压力(ΔP)的值用来估计过滤器(32)中的残余灰分量,并当这一估计的残余灰分量等于或大于预定值(PX)时,输出替换警告信号(K3)催促替换过滤器。
Description
技术领域
本发明涉及一种废气清洁设备。
背景技术
为了抑制包含在柴油引擎废气中的空气扩散,近年来,开发了各种设备用于安装在柴油机引擎排气系统,作为废气中柴油颗粒的后处理。有一种正在成为实用过程中这种类型的废气处理设备,具有包括过滤器的一种结构,用于当废气通过排气通路时收集包含在从柴油引擎释放的废气中的颗粒。使用这种类型的废气清洁设备,由过滤器收集的颗粒逐渐累积,由排气阻力升高引起的损失逐渐增加,并最终过滤器被阻塞。当废气清洁设备中使用的过滤器中累积的颗粒量达到规定水平时,过滤器被加热以燃烧累积的颗粒,并使过滤器恢复,且过滤器被重新使用。
这里为恢复过滤器的燃烧颗粒在过滤器中留下了灰分的残余,并由于残余灰分随每一次过滤器恢复而累积,在恢复的数目增加时,过滤器中残余的灰分阻碍废气的流出。因而由于以前,在每一次过滤器恢复完成时,测量作为过滤器入口压力和出口压力之间的差压力的前和后的差压力,并且前和后测量的过滤器差别压力值用作为估计过滤器中的残余灰分量的基础,并根据估计的结果确定过滤器的寿命。
然而,使用其中通过测量过滤器前和后差压力估计残余灰分量的结构,在开始过滤器恢复过程后的情形下,由于某种原因恢复过程被中断,在过滤器中留下未燃烧颗粒,即使在完成恢复过程之后测量过滤器的前和后差压力,由于未燃烧的颗粒所至也不能精确测量残余的灰分量。
本发明的目的是要提供一种废气清洁设备,其能够解决传统技术的上述问题。
本发明的目的是要提供一种废气清洁设备,其使得能够精确断定余留在过滤器中的灰分量。
本发明的目的是要提供一种废气清洁设备,其使得能够在适当的定时代替过滤器。
本发明的公开
本发明的特征在于一种废气清洁设备,其包括一种过滤器,用于收集包含在内燃引擎废气中的颗粒,以及差压力检测装置,检测过滤器前和后的差压力,配置为基于前和后差压力控制过滤器恢复,其包括温差检测装置,用于检测过滤器容入口端和出口端之间的温差,确定装置,用于响应温差检测装置确定过滤器恢复完成的定时,以及估计装置,用于响应由确定装置确定过滤器的恢复完成定时,基于差压力检测装置的输出,估计过滤器中残余灰分的量。
在基于过滤器前和后温差已确定过滤器恢复已经完成的定时之后,测量过滤器的前和后差压力并估计残余灰分的量,使能够精确估计不包含未燃烧颗粒的残余灰分量,使得能够正确确定替换过滤器的时间。
附图的简要说明
图1是表示用于柴油引擎的本发明的废气清洁装置的一实施例的示意图。
图2是表示图1中所示过滤器控制单元的配置的框图。
图3是用于执行第二处理部分中的算法处理的程序的流程图。
图4是用于描述过滤器控制单元操作的曲线图。
实施本发明的的最佳模式
为了更为详细说明本发明,现在将参照附图对其描述。
图1是一总体示意图,表示适用于柴油机引擎的本发明的废气清洁设备的一实施例。符号1标记一四缸柴油机引擎,其缸体2-5分别装有喷嘴6-9。这些喷嘴6-9的的操作由引擎控制单元10控制,使用已知的结构在所需的时间向对应的缸体喷射高压燃油所需的量。
连接到进气歧管11进气道12装有内冷却器13和空气滤清器14。连接到排气歧管15的排气道16装有废气清洁设备30。
装有EGR控制阀17的排气再循环通道18装设在进气道12和排气道16之间。EGR控制阀17的开口由引擎控制单元10控制的激励器19调节。这形成一种结构,以此在排气道16中流动的废气部分能够被计量不返回到进气歧管11。符号20标记一排气涡轮增压器,其由配置在排气道16内部的排气涡轮21及配置在进气道12内部的压缩机22组成,并由排气涡轮21驱动。
废气清洁设备30包括一氧化催化器31和用于收集颗粒的过滤器32,并这样排布,使得在排气道16中流动的废气首先流到氧化催化器31,并然后流到过滤器32。氧化催化器31通过在例如由蜂房式结构的堇青石或热阻钢构成的支架的表面形成活化的铝敷层,并然后向该敷层赋予适当的催化剂活化成分。氧化催化器31的构成是为了使废气中的NO氧化为NO2,并还使废气中的HC与CO氧化以产生O和CO2。
过滤器32例如由多孔的堇青石或多个金刚砂胞,交替平行形成有密封的入口胞与密封的出口胞形成,所谓壁流型蜂房式或纤维型过滤器构成缠绕在带孔的不锈钢管外围的陶瓷纤维层,收集废气中的颗粒。
过滤器32的入口端(前)和出口端(后)分别装有第一和第二压力传感器33和34,用于检测每一废气的压力。指示过滤器32入口端处废气压力P1的第一压力信号S1,从第一压力传感器33输出,且指示过滤器32出口端处废气压力P2的第二压力信号S2,从第二压力传感器34输出。
此外,过滤器32的入口端(前)和出口端(后)分别装有第一和第二温度传感器36和37,用于检测每一废气温度。指示过滤器32入口端处废气温度T1的第一温度信号S3,从第一压力传感器36输出,且指示过滤器32出口端处废气压力T2的第二温度信号S4,从第二温度传感器37输出。
符号35标记一流率传感器,用于检测排气道16中流动的废气流率。来自流率传感器35的废气流率信号F,与第一压力信号S1,第二压力信号S2,第一温度信号S3,第二温度信号S4一同输入到过滤器控制单元40。
过滤器控制单元40是废气清洁设备30的组成元件。过滤器控制单元40作为使用微型计算机40A的一计算机控制系统构成。在过滤器控制单元40中,估计由过滤器32收集的累积的颗粒量,并基于估计的结果,进行用于恢复过滤器32的过滤器控制。过滤器控制单元40还配置为,当过滤器32的恢复完成时,估计过滤器32中的残余灰分量,并基于灰分残余量的估计结果,进行处理以提示对过滤器32的替换。
图2是一框图,表示过滤器控制单元40的功能构成。过滤器控制单元40具有第一处理部分41,其估计由过滤器32收集的累积的颗粒量,并确定是否应当执行过滤器恢复过程,以及第二处理部分42,其在确认过滤器32是否已完成恢复之后,估计在过滤器32中已累积的残余灰分量,并确定用于替换过滤器32的定时。
在第一处理部分41,响应第一压力信号S1和第二压力信号S2,计算过滤器32的前和后差压力ΔP(=P1-P2),并基于这样获得的前和后差压力ΔP的值估计过滤器32中累积颗粒的量。根据这一估计结果,确定过滤器32是否应当被恢复。当第处理部分41确定过滤器32应当被恢复时,从第一处理部分41输出一恢复启动信号K1,并发送到第二处理部分42和恢复控制部分43。
第一压力信号S1,第二压力信号S2,第一温度信号S3和第二温度信号S4输入到第二处理部分42,在此作出恢复过滤器32的处理操作完成的定时确定,并当恢复过滤器32的处理操作已完成时执行算法处理,用于从过滤器32的前和后差压力ΔP估计过滤器32中的残余灰分量。响应由第二处理部分42作出的过滤器32的恢复已完成的定时的确定,输出并向恢复控制单部分43发送一恢复完成信号K2。当第二处理部分42确定估计的残余灰分的量的值已电镀规定水平时,从第二处理部分42输出一促使替换过滤器的替换警告信号K3,并发送到显示部分44,其以适当的格式显示规定消息,提示操作者替换过滤器。
响应恢复启动信号K1,恢复控制部分43向引擎控制单元10输出一恢复控制信号CS作为控制引擎操作的一信号,为恢复过滤器32以提高废气温度。
响应来自恢复控制部分43的恢复控制信号CS,引擎控制单元10向燃油喷射定时施加一大的延迟,使得燃油喷射在每一汽缸压缩顶部死点后发生,从而把废气温度提高到燃烧颗粒所需的温度。当向恢复控制部分43输入恢复完成信号K2时,恢复控制信号CS的输出停止,且引擎控制单元10停止控制引擎控制过滤器恢复,并返回正常驱动控制操作。
符号45标记一EEPROM,用于存储来自第二处理部分42获得的数据中所需数据。
以下,将参照图3对第二处理部分42作出详细说明。图3是一流程图,表示用于执行在第二处理部分42中所需算法处理的算法处理程序。该算法处理程序在微型计算机40A中执行,在此其响应恢复启动信号K1的输入被启动。首先在步骤S11,指示过滤器32的过滤器前(入口)温度T1的第一温度信号S3,与指示过滤器32的过滤器后(出口)温度T2的第二温度信号S4,用作为计算在过滤器32的入口和出口端的温差ΔT(=T1-T2)的基础,且该过程进入步骤S12。
当响应恢复启动信号K1恢复控制信号CS已输出,从而废气温度已提高到燃烧过滤器32中累积的颗粒的温度,且颗粒的燃烧已完全完成时,废气通过过滤器上其温度稍微降低这一事实用来在步骤S12确定颗粒的燃烧是否已完全完成。在步骤S12,确定在步骤S11计算的温差ΔT(=T1-T2)是否大于规定的值M。如果颗粒的燃烧已完全完成,则温差ΔT将小于M,且步骤S12的确定结果将为NO,并且过程将返回步骤S11。步骤S11和S12的执行重复进行直到温差ΔT变为大于M。当温差ΔT变为大于M时,确定颗粒的燃烧已完全完成,且步骤S12的确定结果变为YES,并且该过程进入步骤S13。M的值可基于实验等适当设置。
在步骤S13,进行用于输出恢复完成信号K2的输出以结束过滤器32的恢复的过程。在下一个步骤S14,为了基于过滤器32的前和后差压力(过滤器32入口和出口端之间的压力差)估计累积在过滤器32中的残余灰分量,基于第一压力信号S1和第二压力信号S2计算这时过滤器32的前和后差压力ΔP(=P1-P2)。为估计残余灰分量过滤器32恢复每次获得的前与后差压力ΔP值存储在EEPROM 45。
以下在步骤S15,这时为估计残余灰分量所计算的前和后差压力ΔP(n),与前一次计算的为估计残余灰分量所计算的前和后差压力ΔP(n-1),以确定差值ΔP(n)-ΔP(n-1)是否小于一预定值K。值K表示由一次恢复产生的残余灰分量增加的上限值。如果ΔP(n)-ΔP(n-1)<K,则这时由恢复产生的残余灰分量中的增加不多于K,且ΔP(n)是一适当的值,于是步骤S15确定的结果为YES,且该过程进入步骤S16。在步骤S16,确定前和后差压力ΔP(n)是否小于给定的差压力阈值PX。差压力阈值PX表示在过滤器32中累积的残余灰分量迫使过滤器替换的前和后差压力ΔP的水平。如果ΔP(n)≥PX,则步骤S16确定的结果为YES,且过程进入步骤S17,在此输出催促过滤器替换的替换警告信号K3。
在下一个步骤S18,在步骤S14这时获得的前和后差压力ΔP(n)存储在EEPROM 45,且程序的执行终止。如果在步骤S16ΔP(n)<PX,则过滤器32中累积的残余灰分量低于过滤器必须替换的水平,于是步骤S16确定的结果为NO,该过程进入步骤S18而不执行步骤S17,这时在步骤S14获得的前和后差压力ΔP(n)存储在EEPROM 45,且程序的执行终止。
在步骤S15,如果ΔP(n)-ΔP(n-1)≥K,这时由恢复产生的残余灰分量多于K,并确定这时获得的ΔP(n)的可靠性有问题,于是步骤S15确定的结果为NO,且过程进入步骤S19。就是说,如果在步骤S15确定ΔP(n)-ΔP(n-1)≥K,则有高度可能性未燃烧的颗粒余留在过滤器32中,这种情形下可认为过滤器32的前和后差压力是由于残余灰分和未燃烧的颗粒所至。因而确定,不能基于这一差压力ΔP(n)精确估计残余灰分量,先前的前和后差压力ΔP(n-1)存储在EEPROM 45,且程序的执行终止。
现在将参照图4说明具有上述结构的过滤器控制单元40的操作。图4是曲线图,表示过滤器32的前和后差压力ΔP基于时间的变化,水平轴表示时间t,而垂直轴表示差压力ΔP。
这表示使用已安装的新的过滤器开始的情形,前和后差压力ΔP在时间t=0为零。随时间的经过,颗粒累积到过滤器32上,且过滤器32的前和后差压力上升。当在时间t1第一处理部分41确定前和后差压力ΔP已达到规定的值PA时,从第一处理部分41输出恢复启动信号K1。响应恢复启动信号K1,恢复控制信号CS从恢复控制部分43输出,且恢复过滤器32的过程开始。这样,颗粒被燃烧,降低了过滤器32的前和后差压力。当在时间t2过滤器32的前和后温度差ΔT已超过M,并在第二处理部分44确定过滤器的恢复已完成时,从第二处理部分44向恢复控制部分43输出恢复完成信号43,终止过滤器32恢复过程。这时,前和后差压力ΔP是对应于残余灰分量的值Pa(>0)。确定这一值Pa是否小于规定的值K。如果Pa小于K,则确定不再返回,于是过滤器32中的残余灰分量被取为对应于值Pa。
随恢复过程的完成,由过滤器32进行的颗粒收集从前和后差压力ΔP=Pa的状态启动。在过滤器控制单元40重复上述操作时,过滤器32的前和后差压力ΔP如实线所示变化。如果即使过滤器32的之后恢复处理前和后差压力ΔP变为ΔP≥PX,则恢复警告信号K3也从第二处理部分42输出,促使过滤器32被替换。
如果在时间tn,当第n次恢复过程已完成时,前和后差压力ΔP=Pb与在先前的(n-1th)次恢复过程的完成时间的前和后差压力ΔP=Pc比较,并且差值Pb-Pc(ΔP(n)-ΔP(n-1))为K或更大,则确定未燃烧的颗粒保留在过滤器32中,这种情形下在第n次恢复过程完成时的前和后差压力ΔP(n-1)=Pc存储在EEPROM 45中。当这时如虚线所示收集由过滤器32恢复时,前和后差压力ΔP的值从值Pb随时间经过而增加。
这样,在已基于前和后过滤器温度差确定过滤器恢复已完成后,估计已累积在过滤器中的残余灰分量,使能够精确估计残余灰分量而不包含未燃烧的颗粒,使得能够正确地确定替换过滤器的时间。
而且,在过滤器恢复完成时过滤器的前和后差压力用作为基准值,以确定下一个过滤器恢复开始的定时,从而使得能够更精确地估计已累积在过滤器中的颗粒量,且其结果是还能够正确地确定过滤器恢复启动的定时。
此外,作为对引擎控制的反馈,残余灰分量能够压力校正燃油喷射量并控制吸入量和压力。
工业应用
如前所述,根据本发明的废气清洁设备适用于确定过滤器替换的定时。
Claims (6)
1.一种废气清洁设备,包括:过滤器,用于收集包含在内燃引擎废气中的颗粒;以及差压力检测装置,检测过滤器前和后的差压力,配置为响应前和后差压力控制过滤器恢复,
所述废气清洁设备的特征在于包括
温差检测装置,用于检测过滤器入口端和出口端之间的温差,
确定装置,用于响应温差检测装置确定过滤器恢复完成的定时,以及
估计装置,用于响应由确定装置确定过滤器的恢复完成定时,基于差压力检测装置的输出,估计过滤器中残余灰分的量。
2.如权利要求1中所述的一种废气清洁设备,其中确定装置包括通过比较温差与预定的值来确定过滤器的恢复是否已完成的装置。
3.如权利要求1中所述的一种废气清洁设备,其中通过估计装置估计残余灰分量是估计过滤器中的残余灰分量是否已达到必须替换过滤器的值。
4.如权利要求3中所述的一种废气清洁设备,其中在从差压力检测装置获得的前和后差压力值的变化量大于一预定值的情形下,估计装置不估计残余灰分量。
5.如权利要求4中所述的一种废气清洁设备,其中在变化量大于一预定值的情形下,促使变化量大于预定值的前和后差压力不用作为残余灰分量的后继估计的数据。
6.如权利要求3,4或5中所述的一种废气清洁设备,其中在过滤器中的灰分量由估计装置估计为达到必须替换过滤器的值的情形下,显示器催促过滤器的替换。
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JP2002234582A JP3869333B2 (ja) | 2002-08-12 | 2002-08-12 | 排気ガス浄化装置 |
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EP (1) | EP1529930B1 (zh) |
JP (1) | JP3869333B2 (zh) |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111322143A (zh) * | 2020-02-26 | 2020-06-23 | 潍柴动力股份有限公司 | 柴油机颗粒捕集器的诊断方法、云端服务器及车载终端 |
Families Citing this family (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7581389B2 (en) * | 2004-01-13 | 2009-09-01 | Emcon Technologies Llc | Method and apparatus for monitoring ash accumulation in a particulate filter of an emission abatement assembly |
JP4038187B2 (ja) * | 2004-03-11 | 2008-01-23 | トヨタ自動車株式会社 | 内燃機関排気浄化装置の粒子状物質再生制御装置 |
WO2006064671A1 (ja) * | 2004-12-13 | 2006-06-22 | Bosch Corporation | ディーゼル機関のための排気浄化装置 |
FR2879244B1 (fr) * | 2004-12-14 | 2007-03-16 | Renault Sas | Dispositif de commande de la regeneration d'un filtre a particules pour moteur a combustion interne et procede correspondant. |
DE602006004199D1 (de) * | 2005-05-13 | 2009-01-22 | Honda Motor Co Ltd | Abgasemissionssteuerungssystem für einen Verbrennungsmotor und Steuerungsverfahren dafür |
US7623953B2 (en) * | 2005-06-08 | 2009-11-24 | Caterpillar Inc. | Integrated regeneration and engine controls |
US7406822B2 (en) * | 2005-06-30 | 2008-08-05 | Caterpillar Inc. | Particulate trap regeneration system and control strategy |
US7607295B2 (en) * | 2005-07-07 | 2009-10-27 | Nissan Motor Co., Ltd. | Particulate accumulation amount estimating system |
US7562524B2 (en) * | 2005-09-15 | 2009-07-21 | Cummins, Inc. | Apparatus, system, and method for estimating particulate consumption |
US7587892B2 (en) * | 2005-12-13 | 2009-09-15 | Cummins Ip, Inc | Apparatus, system, and method for adapting a filter regeneration profile |
US7562523B2 (en) * | 2005-12-13 | 2009-07-21 | Cummins, Inc | Apparatus, system, and method for determining a regeneration cycle thermal ramp |
US7677030B2 (en) * | 2005-12-13 | 2010-03-16 | Cummins, Inc. | Apparatus, system, and method for determining a regeneration availability profile |
US7758676B2 (en) * | 2006-10-03 | 2010-07-20 | Gm Global Technology Operations, Inc. | Adaptive learning method for clean particulate filter pressure drop |
FR2914691A1 (fr) * | 2007-04-06 | 2008-10-10 | Renault Sas | Procede et dispositif de generation de signal d'arret de regeneration de filtre a particules |
JP2009138704A (ja) * | 2007-12-10 | 2009-06-25 | Mitsubishi Fuso Truck & Bus Corp | 排気後処理装置 |
US7835847B2 (en) * | 2008-02-28 | 2010-11-16 | Cummins Ip, Inc | Apparatus, system, and method for determining a regeneration availability profile |
US8499550B2 (en) * | 2008-05-20 | 2013-08-06 | Cummins Ip, Inc. | Apparatus, system, and method for controlling particulate accumulation on an engine filter during engine idling |
US20100050874A1 (en) * | 2008-08-29 | 2010-03-04 | Walter Cullen Lucas | Exhaust after treatment system and method |
US8266890B2 (en) * | 2009-06-10 | 2012-09-18 | International Engine Intellectual Property Company, Llc | Preventing soot underestimation in diesel particulate filters by determining the restriction sensitivity of soot |
US20110000193A1 (en) * | 2009-07-02 | 2011-01-06 | Woodward Governor Company | System and method for detecting diesel particulate filter conditions based on thermal response thereof |
KR101114385B1 (ko) * | 2009-09-01 | 2012-02-14 | 현대자동차주식회사 | 디젤차량의 후처리계 보호장치 및 방법 |
JP5088391B2 (ja) * | 2010-03-09 | 2012-12-05 | トヨタ自動車株式会社 | パティキュレートフィルタの故障判別装置 |
US8577541B2 (en) * | 2010-10-01 | 2013-11-05 | Deere & Company | Particulate filter ash loading prediction method and vehicle using same |
US8660741B2 (en) * | 2010-10-01 | 2014-02-25 | Deere & Company | Particulate filter ash loading prediction method and vehicle with same |
US8214135B2 (en) * | 2010-10-01 | 2012-07-03 | Deere & Company | Particulate filter ash loading prediction method and vehicle using same |
DE102011015061A1 (de) * | 2011-03-24 | 2012-09-27 | Mann + Hummel Gmbh | Verfahren und Vorrichtung zur Dosierung des Additivs zur Regenerierung eines Dieselpartikelfilters |
US8398742B2 (en) * | 2011-05-19 | 2013-03-19 | GM Global Technology Operations LLC | Pressure sensor disconnection detection systems and methods |
JP6197377B2 (ja) * | 2013-06-03 | 2017-09-20 | いすゞ自動車株式会社 | 排気浄化装置 |
GB2525354B (en) * | 2015-08-13 | 2016-08-24 | Gm Global Tech Operations Llc | A method of controlling a particulate filter |
DE102017211575B4 (de) * | 2017-07-06 | 2019-07-04 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Diagnose eines Differenzdrucksensors eines Partikelfilters |
JP6932673B2 (ja) | 2018-06-26 | 2021-09-08 | 株式会社クボタ | ディーゼルエンジンの排気処理装置 |
FR3085424A1 (fr) * | 2018-09-04 | 2020-03-06 | Psa Automobiles Sa | Procede d’estimation d’une masse de residus dans un filtre a particules |
CN110935249A (zh) * | 2018-09-25 | 2020-03-31 | 莱芜钢铁集团电子有限公司 | 一种空气过滤器自洁控制方法及装置 |
KR101941824B1 (ko) * | 2018-11-08 | 2019-01-23 | 정갑철 | 매연 여과 장치 |
CN111637605A (zh) * | 2020-05-20 | 2020-09-08 | 三菱重工海尔(青岛)空调机有限公司 | 空调清洗方法、计算机可读介质以及空调器 |
JP7384114B2 (ja) | 2020-05-29 | 2023-11-21 | いすゞ自動車株式会社 | フィルタ状態検知装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5287698A (en) * | 1989-12-27 | 1994-02-22 | Nissan Motor Co., Ltd. | Exhaust gas purifying device for an internal combustion engine |
JPH0711935A (ja) * | 1993-06-29 | 1995-01-13 | Toyota Autom Loom Works Ltd | 排気ガス浄化装置 |
JPH07119443A (ja) * | 1993-10-28 | 1995-05-09 | Nissan Motor Co Ltd | ディーゼル機関の排気浄化装置 |
JPH11280449A (ja) * | 1998-03-31 | 1999-10-12 | Nissan Motor Co Ltd | 内燃機関の排気浄化装置 |
JP2001280122A (ja) * | 2000-03-30 | 2001-10-10 | Tokyo Roki Co Ltd | ディーゼルエンジンの黒煙浄化装置 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5920515A (ja) * | 1982-07-23 | 1984-02-02 | Toyota Motor Corp | 粒子捕集器の再生方法 |
JPH0621549B2 (ja) * | 1985-07-04 | 1994-03-23 | トヨタ自動車株式会社 | フイルタの再生装置 |
US4803838A (en) * | 1987-12-24 | 1989-02-14 | Kaeser Henry E | Diesel particulate infusion controller |
DE10029513B4 (de) * | 2000-06-21 | 2004-04-15 | Daimlerchrysler Ag | Verfahren und Vorrichtung zur Reduzierung von Ascherückständen in einem Partikelfilter |
US6405528B1 (en) * | 2000-11-20 | 2002-06-18 | Ford Global Technologies, Inc. | Method for determining load on particulate filter for engine exhaust, including estimation of ash content |
US6622480B2 (en) * | 2001-02-21 | 2003-09-23 | Isuzu Motors Limited | Diesel particulate filter unit and regeneration control method of the same |
JP4506060B2 (ja) * | 2001-09-14 | 2010-07-21 | 三菱自動車工業株式会社 | パティキュレートフィルタの再生制御装置 |
DE10223427A1 (de) * | 2002-05-25 | 2003-12-18 | Bayerische Motoren Werke Ag | Verfahren zur Regenerierung eines verstopften Partikelfilters |
US6829890B2 (en) * | 2002-08-13 | 2004-12-14 | International Engine Intellectual Property Company, Llc | Forced regeneration of a diesel particulate filter |
JP3801135B2 (ja) * | 2003-01-08 | 2006-07-26 | 日産自動車株式会社 | エンジンの排気ガス浄化装置 |
US7628011B2 (en) * | 2004-01-13 | 2009-12-08 | Emcon Technologies Llc | Emission abatement assembly and method of operating the same |
-
2002
- 2002-08-12 JP JP2002234582A patent/JP3869333B2/ja not_active Expired - Fee Related
-
2003
- 2003-08-08 KR KR1020047007189A patent/KR100588897B1/ko not_active IP Right Cessation
- 2003-08-08 CN CNB038012669A patent/CN100335756C/zh not_active Expired - Fee Related
- 2003-08-08 AU AU2003257818A patent/AU2003257818A1/en not_active Abandoned
- 2003-08-08 US US10/492,025 patent/US7264642B2/en not_active Expired - Fee Related
- 2003-08-08 EP EP03788058A patent/EP1529930B1/en not_active Expired - Fee Related
- 2003-08-08 WO PCT/JP2003/010129 patent/WO2004016915A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5287698A (en) * | 1989-12-27 | 1994-02-22 | Nissan Motor Co., Ltd. | Exhaust gas purifying device for an internal combustion engine |
JPH0711935A (ja) * | 1993-06-29 | 1995-01-13 | Toyota Autom Loom Works Ltd | 排気ガス浄化装置 |
JPH07119443A (ja) * | 1993-10-28 | 1995-05-09 | Nissan Motor Co Ltd | ディーゼル機関の排気浄化装置 |
JPH11280449A (ja) * | 1998-03-31 | 1999-10-12 | Nissan Motor Co Ltd | 内燃機関の排気浄化装置 |
JP2001280122A (ja) * | 2000-03-30 | 2001-10-10 | Tokyo Roki Co Ltd | ディーゼルエンジンの黒煙浄化装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111322143A (zh) * | 2020-02-26 | 2020-06-23 | 潍柴动力股份有限公司 | 柴油机颗粒捕集器的诊断方法、云端服务器及车载终端 |
CN111322143B (zh) * | 2020-02-26 | 2021-08-20 | 潍柴动力股份有限公司 | 柴油机颗粒捕集器的诊断方法、云端服务器及车载终端 |
Also Published As
Publication number | Publication date |
---|---|
EP1529930B1 (en) | 2011-10-12 |
US7264642B2 (en) | 2007-09-04 |
EP1529930A4 (en) | 2010-06-30 |
JP3869333B2 (ja) | 2007-01-17 |
KR20040066810A (ko) | 2004-07-27 |
KR100588897B1 (ko) | 2006-06-12 |
JP2004076605A (ja) | 2004-03-11 |
WO2004016915A1 (ja) | 2004-02-26 |
AU2003257818A1 (en) | 2004-03-03 |
EP1529930A1 (en) | 2005-05-11 |
US20040211159A1 (en) | 2004-10-28 |
CN1568400A (zh) | 2005-01-19 |
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