CN1776202A - 内燃机废气排放控制装置 - Google Patents

内燃机废气排放控制装置 Download PDF

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CN1776202A
CN1776202A CNA2005101271603A CN200510127160A CN1776202A CN 1776202 A CN1776202 A CN 1776202A CN A2005101271603 A CNA2005101271603 A CN A2005101271603A CN 200510127160 A CN200510127160 A CN 200510127160A CN 1776202 A CN1776202 A CN 1776202A
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temperature
filter
temperature rise
dpf
control
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CN100439665C (zh
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仓田和朗
饭塚章
近藤浩司
信原惠
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Mitsubishi Motors Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F02D41/402—Multiple injections
    • F02D41/405—Multiple injections with post injections
    • 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
    • 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
    • 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
    • F01N13/0097—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 the purifying devices are arranged in a single housing
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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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
    • F01N3/025—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 fuel burner or by adding fuel to exhaust
    • F01N3/0253—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 fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • 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
    • 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
    • F01N3/033—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 in combination with other devices
    • F01N3/035—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 in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/024—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus
    • F02D41/0245—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to increase temperature of the exhaust gas treating apparatus by increasing temperature of the exhaust gas leaving the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/06—Combinations of different methods of purification afterburning and filtering
    • 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
    • F01N2430/06—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics by varying fuel-air ratio, e.g. by enriching fuel-air mixture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01N2550/00—Monitoring or diagnosing the deterioration of exhaust systems
    • F01N2550/04—Filtering activity of particulate filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01N2560/00—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics
    • F01N2560/06—Exhaust systems with means for detecting or measuring exhaust gas components or characteristics the means being a temperature sensor
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    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F02D2200/0802—Temperature of the exhaust gas treatment apparatus
    • F02D2200/0804—Estimation of the temperature of the exhaust gas treatment apparatus
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    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • 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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  • Processes For Solid Components From Exhaust (AREA)
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Abstract

一种内燃机废气排放控制装置包括：设置在内燃机(1)排气通道(11)中用于捕集废气中微粒的DPF(17)；用于确定DPF再生是否必要的ECU(30)；当ECU(30)判断再生必要时用于提升DPF温度的诸如后喷射的温升装置(16，30)；以及用于检测DPF温度的温度传感器(22)。当通过温升装置实施DPF温升控制时，如果温度传感器(22)检测的DPF温度为预定温度或更高，内燃机废气排放控制装置中止通过温升装置对温升的控制。如果DPF温度为预定温度或更高并且DPF温度梯度为负值，温升装置恢复DPF的温升控制。

Description

内燃机废气排放控制装置
                           技术领域
本发明涉及一种内燃机(以下简称发动机)废气排放控制装置，更具体地说涉及一种在柴油机的排气系统上装有柴油机微粒过滤器(以下简称DPF)的废气排放控制装置。
                           背景技术
从柴油机排出的废气包含诸如碳氢化合物(HC)，碳氢氧化物(CO)，氮的氧化物(NOx)以及微粒物质(PM；以下称作微粒)的污染物。为了抑制这些物质对空气的污染，诸如废气再循环(以下称作EGR)和共轨型高压燃油喷射的燃烧技术，或利用柴油机氧化催化剂(以下简称作DOC)或DPF的后处理技术已经得到开发。
DPF是一种过滤器，安装在发动机排气管中间用于直接捕集废气中的微粒。DPF包括由陶瓷制成的整体蜂窝壁流型过滤器，和由陶瓷或金属纤维形成的纤维型过滤器。
然而，由于DPF捕集微粒，阻塞开始发生，废气的压力(排气压力)升高。因此，作为将捕集和积聚的微粒定期清除过程的所谓强制再生是必要的。
强制再生的常规方法包括通过延迟燃料喷射正时提高发动机的废气温度，或同燃油后喷射相关通过将HC提供给DOC(设置在DPF的前级)使得热量产生，从而将DPF的温度通常提高到600℃或更高来燃烧和消除微粒。
与上述利用同燃油后喷射相关通过将HC提供给DOC产生热量从而提高DPF温度的强制再生的方法相关，设想一种以HC(燃油)加入量为输入，DOC出口的废气温度为输出的控制系统。因为DOC较大的热容量，这个系统是反应很慢的系统，因此产生实施控制极端困难的问题。例如，如果控制温度的过调节量大，积累在DPF上的微粒将有可能开始猛烈燃烧直至温度超过DPF的耐热温度，最终损毁DPF。因此，需要精确的温度控制。
日本专利申请公开号2003-155913公布了一种废气排放控制方法和装置，如果DPF温度(催化剂床的温度)超过预定值(或温升梯度超过预定梯度)，中止向DOC添加燃油，从而抑制DPF温度的过度升高(过调节)。
但是利用日本专利申请公开号2003-155913的废气排放控制方法和装置，DPF温度超过预定值后的温度控制不再实施，因此产生如下问题：因为温度下降而恢复DPF温升的时侯，即使通过加热装置(DOC)诸如向其添加燃油使DPF的温度将要升高，但由于加热装置反应延迟还是使得DPF的温度过低。因此，温度不会有效升高，且直到DPF再生实际发生之前要花费许多时间。而且，如果DPF的温度超过预定温度，或如果温升梯度超过预定梯度，温升的控制中止。但是，对于控制中止前温升控制的响应(结果)不会在下次温升控制中反映，因此，存在DPF可能过热的问题。
                           发明内容
本发明是根据上述问题完成的。本发明的目标是提供一种内燃机的废气排放控制装置，它能迅速而精确地将过滤器控制到过滤器能够再生的温度范围内，同时减少过滤器强制再生的温度控制期间的失调量，并且也能够减少过滤器温升所需的燃油喷射量。
目的是获取上述目标的根据本发明的内燃机废气排放控制装置包括：
设置在内燃机排气通道上用于捕集废气中的微粒的过滤器；
用于确定过滤器再生是否必要的过滤器再生确定装置；
当过滤器再生确定装置确定过滤器再生必要时用于过滤器温升的温升装置；以及
用于检测过滤器或过滤器附近温度的过滤器温度检测装置，并且
其中当通过温升装置实施对过滤器温升的控制时，如果由过滤器温度检测装置检测的过滤器温度为预定温度或更高，通过温升装置对温升的控制就会中止。
其特征在于，当通过温度检测装置检测的温度为预定温度或更高时，如果温升装置检测到温度降低，温升装置恢复对过滤器温升的控制。
根据本发明的上述特征，当过滤器的温度为预定温度或更高，并且温度降低时，对过滤器温升的控制恢复。因此，失调(温度过度下降)能够被抑制，并且过滤器能够迅速而精确地控制到过滤器能够再生的温度范围。而且，在恢复温升控制时过滤器温升所需的燃油喷射量可以减少。结果，燃油经济性得到改善。
本废气排放控制装置的特征还在于，如果温升装置检测到过滤器温度降低，并且如果过滤器温度降到低于设置为高于预定温度的温升恢复温度，温升装置恢复对过滤器温升的控制。
根据这些特征，如果检测到过滤器温度降低，并且如果过滤器温度降到低于设置为高于预定温度的温升恢复温度，则恢复对过滤器温升的控制。因此，过滤器能够迅速而精确地控制到过滤器能够再生的温度范围且能够防止过滤器温度的过度升高。
本废气排放控制装置的特征还在于，温升装置根据过滤器温升控制中止时过滤器的最高温度设定温升装置在对过滤器温升的控制恢复时的控制量。
根据这个特征，温升装置在对过滤器温升的控制恢复时的控制量根据当温升控制中止时过滤器的最高温度设定。因此，过滤器能够迅速而精确地控制到过滤器能够再生的温度范围且能够使波动范围变窄。
                             附图说明
本发明将通过下面的详细叙述和附图得到更全面的理解，叙述和附图仅仅通过说明的方式给出，因此不是对本发明的限制，其中：
图1是显示本发明的实施例的柴油机废气排放控制装置的结构示意图；
图2是DPF强制再生的温度控制流程图；以及
图3是显示DPF的温度控制实例的曲线图。
                           具体实施方式
根据本发明的内燃机废气排放控制装置将参照附图通过实施例进行详细描述，但是本
实施例不限制本发明。
实施例
图1是显示本发明的实施例的柴油机废气排放控制装置的结构示意图。图2是DPF强制再生的温度控制流程图。图3是显示DPF的温度控制实例的曲线图。
如图1所示，多缸柴油机(以下称作发动机)1具有汽缸盖2和汽缸体3。活塞4装配在每个汽缸体3的缸径中使它能以往复的方式移动。燃烧室5由活塞的顶表面，缸径的壁表面以及汽缸盖的下表面形成。
通过进气阀6开和关的进气口7形成在汽缸盖2中，包括进气歧管的进气道8连接到进气口7。通过排气阀9开和关的排气口10形成在汽缸盖2中，包括排气歧管的排气道11连接到排气口10。
变容式增压器(以下简称VCT)12设置在进气道8和排气道11之间，并且提供给燃烧室5的增压进气空气因此被中间冷却器13冷却。中间冷却器13下游侧的进气道8和VCT12上游侧的排气道11通过EGR通道14连接，并且EGR的量通过设置在EGR14中的EGR阀15控制。在VCT12的下游侧的排气道11中，在废气流动方向上依次设置DOC16和DPF(过滤器)17。
直接将燃油喷射到每个汽缸的燃烧室5的电子控制燃油喷射阀19设置在汽缸盖2上。控制到预定燃油压力的高压燃油从共轨20提供到燃油喷射阀19。在图上，数字21表示将燃油从油箱(没有显示)提供到共轨20并且和发动机1相关联驱动旋转的燃料提供泵。
燃油喷射阀19通过电子控制单元(以下称作ECU)30驱动和控制。也就是说，ECU30从检测油门开度的传感器接收油门开度信号，和从检测发动机速度(和曲柄转角)的传感器接收发动机速度信号。基于这些关于油门开度和发动机速度的信号，ECU30修正目标燃油喷射量和目标喷射正时，并且确定燃油喷射阀19中电磁阀开和关的正时，使得这些目标燃油喷射量和喷射正时得以实现。
ECU30也从安装在DPF17入口检测DPF17温度的温度传感器(过滤器温度检测装置)22上接收信号。作为过滤器温度检测装置，温度传感器22被容许直接检测DPF的温度，或基于操作状态或DPF附近的温度通过估计检测该温度。图上数字25表示电子控制节流阀，电子控制节流阀25根据发动机的操作状态通过ECU30驱动和控制，像前面提到的EGR阀15和VCT12(阀门开度)一样。
假设在机动车行驶时正常模式切换到进行DPF17的强制再生的强制再生模式(控制)，对DPF17温升的控制通过燃油的后喷射(同DOC16一起构成温升方式，但也可以是排气冲程喷射)实现。如果此时通过温度传感器22检测的DPF温度达到目标温度(预定温度)或更高，ECU30中止后喷射。如果DPF温度是目标温度或以上并且温度梯度(单位时间变化率)为负值，这时温度降低，ECU恢复后喷射(过滤器再生确定方式)。
即，当对DPF17温升的控制开始时，先经过一段时间，直到DPF17的温度实际上升。因此，如果温升控制在温度降到目标温度之下后才开始，DPF17的温度已经低得此时再开始DPF17的强制再生已经太晚。ECU30弥补了这个缺陷。特别是在通过DOC16升温的情况下，DOC16的反应时间需要对于DOC16自身温升的额定滞后的补偿。因此，在强制再生模式中，燃油喷射阀19被驱动和控制成使得在活塞4的压缩上死点(曲柄角0°)附近进行的主燃油喷射操作后跟随在晚于压缩上死点的没有点火的正时进行的后喷射操作。在该后喷射时，未燃的燃料(HC)被添加到废气，并且该未燃的燃料在位于DPF17的前级的DOC16中发生氧化反应。通过反应热使催化剂床的温度升高，以燃烧和除去捕集和积累在DPF17中的微粒。上面提到的ECU30中从正常模式切换到强制再生模式可以以恰当的间隔定期进行，但模式切换可以通过基于前-DPF/后-DPF压差评估DPF17的捕集状态，或通过从操作记录估计捕集量来进行。
例如，如图2的流程图所示，ECU30在DPF17的强制再生中实施温度控制。
下面将提供温度控制的细节。步骤P1确定现在后喷射是否进行。如果答案是肯定的(是)，步骤P2确定是否DPF的温度是否低于目标温度(例如650℃)。如果判定为答案是肯定的(是)，步骤P3将基于先前的最高温度(升温操作恢复前的温度)进行喷射量补正。并且在步骤P4继续后喷射。另一方面，如果在步骤P2答案为否定的(否)，后喷射在步骤P5终止。
如果在步骤P1答案为否定的(否)，步骤P6确定DPF的温度是否低于预定值(温升恢复温度)。如果答案是肯定的(是)，步骤P7确定温度梯度是否小于0(负值)。如果答案是肯定的(是)，步骤P3基于先前的最高温度(升温操作恢复前的温度)进行喷射量补正。并且在步骤P4恢复后喷射。
如果在步骤P6答案为否定的(否)，在步骤P8测量最高温度，然后在步骤P9中止后喷射。如果在步骤P7中答案为否定的(否)，实现与步骤P6后同样的步骤。也就是说，在步骤P8测量最高温度，然后在步骤P9中止后喷射。
如上所述，在本实施例中，在DPF的强制再生的过程中，甚至在温度控制下当DPF温度达到目标(预定)温度或更高时后喷射一度中止以后，如果DPF17的温度梯度为负值，后喷射就将恢复。因此，能够抑制失调(温度过度下降)发生，并且DPF17能迅速而精确地控制到DPF17能够再生的温度范围。而且，下次后喷射所需的燃油喷射量能够降低。结果，燃油经济性得到改善(见图3中显示DPF温度控制的实例的曲线图)。
甚至当DPF的温度梯度为负值时，如果温度低于设定为高于上述目标温度的预定值(温升恢复温度)，后喷射才恢复。因此DPF17能迅速而精确地控制到DPF17能够再生的温度范围且防止了DPF17的过度温升。
而且，在后喷射恢复时的燃油喷射量(控制量)根据DPF温度到达或高于目标温度后和后喷射恢复前存在的最高温度进行补正(即，在发动机的工作范围内确定的初始值以过调量补正)。因此DPF17能迅速而精确地控制到DPF17能够再生的温度范围且波动的范围变窄。
虽然本发明通过上述实施例进行说明，但可以理解本发明不限于该实施例，而且可以有很多其他方式的变化。例如，导致温升控制滞后的温升装置可以代替DOC16用作DPF17温升的装置。在这种情形下可以获得同样的效果。当然，DOC16可以作为载体整体支撑在DPF17上。而且，后喷射恢复时的燃油喷射量(控制量)可以根据上面提到的最高温度和目标温度之间的偏差来设定。这样的变化不认为是背离了本发明的精神和范围，并且所有对本技术领域熟练专业人员显而易见的这些修改将被包括在附后的权利要求的范围内。

Claims (3)

1、一种内燃机废气排放控制装置，其特征在于，包括：
设置在内燃机(1)的排气通道(11)中用于捕集废气中微粒的过滤器(17)；
用于确定过滤器(17)再生是否必要的过滤器再生确定装置(30)；
当过滤器再生确定装置(30)确定过滤器(17)再生必要时用于过滤器(17)温升的温升装置(16，30)；以及
用于检测过滤器(17)或过滤器(17)附近温度的过滤器温度检测装置(22)，并且
其中当通过温升装置(16，30)实施对过滤器(17)温升的控制时，如果通过过滤器温度检测装置(22)检测的过滤器(17)温度为预定温度或更高，通过温升装置(16，30)进行的对温升的控制中止，
其特征在于，当通过过滤器温度检测装置(22)检测的温度为预定温度或更高时，如果温升装置(16，30)检测到温度降低，温升装置(16，30)恢复对过滤器(17)温升的控制。
2、如权利要求1所述的内燃机废气排放控制装置，其特征在于，如果温升装置(16，30)检测到过滤器(17)温度降低，并且如果过滤器(17)温度降到低于设定为高于预定温度的温升恢复温度，温升装置(16，30)恢复对过滤器(17)温升的控制。
3、如权利要求2所述的内燃机废气排放控制装置，其特征在于，温升装置(16，30)根据对过滤器(17)温升的控制中止时过滤器(17)的最高温度设定对过滤器(17)恢复温升控制时的温升装置(16，30)的控制量。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107208564A (zh) * 2014-12-09 2017-09-26 Fpt工业股份公司 用于管理颗粒过滤器的再生的方法和系统

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2066880A1 (en) * 2006-09-19 2009-06-10 Industriell Plåtproduktion Ab Exhaust gas system
EP1918541B1 (en) * 2006-11-06 2009-02-25 GM Global Technology Operations, Inc. Operating method for a particulate filter, data processor program product and control apparatus therefore
EP1918540B1 (en) * 2006-11-06 2009-08-26 GM Global Technology Operations, Inc. Operating method for a particulate filter, data processor program product and control apparatus therefore
US8091345B2 (en) 2008-02-06 2012-01-10 Cummins Ip, Inc Apparatus, system, and method for efficiently increasing exhaust flow temperature for an internal combustion engine
US8061127B2 (en) * 2008-04-29 2011-11-22 Cummins, Inc. Thermal management of diesel particulate filter regeneration events
US8156730B2 (en) 2008-04-29 2012-04-17 Cummins, Inc. Engine performance management during a diesel particulate filter regeneration event
FR2930968B1 (fr) * 2008-05-07 2014-10-24 Renault Sas Procede de regeneration d'un systeme de post traitement par fractionnement de la richesse.
US8302385B2 (en) 2008-05-30 2012-11-06 Cummins Ip, Inc. Apparatus, system, and method for controlling engine exhaust temperature
JP4631942B2 (ja) 2008-07-23 2011-02-16 マツダ株式会社 パティキュレートフィルタ再生装置
US8607549B2 (en) * 2009-07-31 2013-12-17 Ford Global Technologies, Llc Controlling regeneration of an emission control device
FR2955892B1 (fr) * 2010-02-02 2015-03-06 Renault Sa Procede et systeme de gestion de la temperature de regeneration d'un filtre a particules
JP5703599B2 (ja) * 2010-06-11 2015-04-22 いすゞ自動車株式会社 排気ガス浄化システム
CN102011632A (zh) * 2010-11-05 2011-04-13 奇瑞汽车股份有限公司 一种用于监控汽车排气系统的控制电路及其控制方法
EP3037637B1 (en) * 2014-12-22 2017-08-09 Continental Automotive GmbH Method for controlling the regeneration process of a diesel particulate filter
JP7354875B2 (ja) * 2020-02-25 2023-10-03 マツダ株式会社 過給機付きエンジン
JP7472880B2 (ja) 2021-09-03 2024-04-23 トヨタ自動車株式会社 車両の制御装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0441914A (ja) * 1990-06-01 1992-02-12 Nissan Motor Co Ltd 内燃機関の排気処理装置
JP2738251B2 (ja) * 1993-01-20 1998-04-08 松下電器産業株式会社 内燃機関用フィルタ再生装置
DE10144958B4 (de) * 2001-09-12 2012-08-16 Volkswagen Ag Regeneration eines Partikelfilters einer Dieselbrennkraftmaschine
JP2003155913A (ja) * 2001-11-20 2003-05-30 Hino Motors Ltd 排気浄化方法及び装置
US6931842B2 (en) * 2002-11-29 2005-08-23 Nissan Motor Co., Ltd. Regeneration of diesel particulate filter
JP4248427B2 (ja) * 2004-03-11 2009-04-02 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107208564A (zh) * 2014-12-09 2017-09-26 Fpt工业股份公司 用于管理颗粒过滤器的再生的方法和系统

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