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公开(公告)号：US07146804B2
公开(公告)日：2006-12-12
申请号：US10460208
申请日：2003-06-13
IPC分类号： F01N3/00
CPC分类号： F02D41/1448 , F01N3/023 , F01N9/002 , F02B29/0406 , F02B37/00 , F02D41/0007 , F02D41/029 , F02D41/1446 , F02D41/187 , F02D2200/0812 , F02D2200/501 , F02M26/15 , F02M26/23 , Y02T10/144 , Y02T10/47
摘要： An exhaust gas cleaning system for a diesel engine has a diesel particulate filter (DPF) disposed in an exhaust pipe. An electronic control unit of the system controls regeneration of the DPF. The DPF is heated and regenerated only when an operating state of the engine is in an area where temperature-increasing efficiency is high, in the case where a quantity of particulate matters collected by the DPF is equal to or greater than a first threshold and is less than a second threshold. The second threshold is greater than the first threshold. If the quantity of the collected particulate matters becomes equal to or greater than the second threshold, the regeneration is performed even if the operating state is not in the area of the high temperature-increasing efficiency.
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公开(公告)号：US07076944B2
公开(公告)日：2006-07-18
申请号：US10810750
申请日：2004-03-29
IPC分类号： F01N3/00
CPC分类号： F02D41/029 , F01N3/023 , F01N3/035 , F01N9/002 , F01N13/009 , F02D41/025 , F02D41/405 , F02D2200/0804 , F02D2200/0812 , Y02T10/26 , Y02T10/44 , Y02T10/47
摘要： An exhaust gas cleaning system of a diesel engine includes a diesel particulate filter (a DPF) disposed in an exhaust passage, and a diesel oxidation catalyst (a DOC) disposed upstream of the DPF. When an electronic control unit (an ECU) performs a temperature increasing operation such as post-injection to eliminate particulate matters accumulated in the DPF, a ratio (a duty ratio) between a performing period and an interrupting period of the temperature increasing operation is changed in accordance with temperature of the DPF. Thus, a quantity of hydrocarbon supplied to the DOC is controlled stepwise or continuously. Thus, the temperature of the DPF can be increased to target temperature quickly and can be maintained near the target temperature when the regeneration of the DPF is performed.
摘要翻译： 柴油发动机的废气净化系统包括设置在排气通道中的柴油机微粒过滤器（DPF）和设置在DPF上游的柴油机氧化催化剂（DOC）。 当电子控制单元（ECU）执行诸如后注入的升温操作以消除在DPF中累积的颗粒物质时，升温操作的执行周期和中断时段之间的比率（占空比）被改变 根据DPF的温度。 因此，供给到DOC的碳氢化合物的量被逐步或连续地控制。 因此，当执行DPF的再生时，DPF的温度可以快速提高到目标温度并且可以保持在目标温度附近。
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公开(公告)号：US06962046B2
公开(公告)日：2005-11-08
申请号：US10461394
申请日：2003-06-16
IPC分类号： F02D45/00 , B01D46/42 , F01N3/02 , F01N3/023 , F01N3/035 , F01N3/20 , F01N9/00 , F01N11/00 , F02D41/02 , F02D41/14 , F01N3/00
CPC分类号： F02D41/1448 , F01N3/023 , F01N3/035 , F01N9/002 , F01N11/002 , F01N2430/08 , F01N2430/085 , F02D41/029 , F02D41/1446 , F02D41/187 , F02D2200/0812 , Y02T10/47 , Y10S55/30
摘要： An electronic control unit (ECU) of an exhaust gas cleaning system for an internal combustion engine having a diesel particulate filter (DPF) determines whether collection quantity of exhaust particulate matters collected by the DPF is greater than a regeneration start value or not. The collection quantity is calculated from a pressure difference at the DPF and a flow rate of exhaust gas. If the collection quantity is determined to be greater than the regeneration start value, the ECU increases the temperature of the DPF to regenerate the DPF. The regeneration start value is set smaller as the detection accuracy of the collection quantity decreases. The regeneration start value is set smaller as the exhaust gas flow rate decreases and a rate of change in an accelerator position increases.
摘要翻译： 用于具有柴油机微粒过滤器（DPF）的内燃机排气净化系统的电子控制单元（ECU）确定由DPF收集的废气颗粒物质的收集量是否大于再生开始值。 收集量由DPF的压力差和排气的流量计算。 如果收集量被确定为大于再生开始值，则ECU增加DPF的温度以再生DPF。 随着收集量的检测精度降低，再生开始值被设定得更小。 随着废气流量的降低，加速器位置的变化率的增加，再生开始值被设定得较小。
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公开(公告)号：US06758039B2
公开(公告)日：2004-07-06
申请号：US10460207
申请日：2003-06-13
IPC分类号： F01N302
CPC分类号： F02D41/1445 , F01N3/023 , F01N3/035 , F01N9/002 , F01N11/002 , F01N2430/085 , F01N2900/0421 , F01N2900/0422 , F02D41/029 , F02D41/1448 , F02D41/187 , F02D2200/0404 , F02D2200/0812 , Y02T10/47
摘要： In an exhaust gas cleaning system of an internal combustion engine having a diesel particulate filter (DPF), measuring accuracy of a collection quantity of particulate matters collected by the DPF is estimated based on an accelerator position change rate and an exhaust gas flow rate. When the measuring accuracy is high, the collection quantity is calculated based on a pressure difference and the exhaust gas flow rate at the DPF. If the measuring accuracy is low, an increment value of the collection quantity is calculated based on a quantity of the particulate matters discharged from an engine main body. Then, the collection quantity is calculated by adding the collection quantity increment value to the previous collection quantity calculated based on the pressure difference and the exhaust gas flow rate while the measuring accuracy is high.
摘要翻译： 在具有柴油机微粒过滤器（DPF）的内燃机的废气净化系统中，基于加速器位置变化率和废气流量来推定由DPF收集的颗粒物质的收集量的测量精度。 当测量精度高时，基于DPF的压力差和排气流量来计算收集量。 如果测量精度低，则基于从发动机主体排出的颗粒物的量来计算收集量的增量值。 然后，通过将采集量增量值与在测量精度高时基于压差和排气流量计算的先前收集量相加来计算收集量。
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5.发明授权Exhaust gas filtering system having particulate filter for internal combustion engine 有权具有用于内燃机的微粒过滤器的废气过滤系统公开(公告)号：US06969413B2
公开(公告)日：2005-11-29
申请号：US10459556
申请日：2003-06-12
CPC分类号： B01D46/2418 , B01D46/0063 , B01D46/446 , B01D46/46 , B01D2279/30 , F02D41/0002 , F02D41/029 , F02D41/123 , Y02T10/42 , Y10S55/10 , Y10S55/30
摘要： A flow rate of gas supplied to a diesel particulate filter is increased when it is determined that rapid combustion of collected particulates, which are collected by the particulate filter, is likely to occur based on an operating state of an internal combustion engine. Alternatively, the flow rate of gas supplied to the filter is increased when it is determined that rapid combustion of the collected particulates is initiated based on a state of the particulate filter.
摘要翻译： 当确定基于内燃机的运行状态可能发生由颗粒过滤器收集的收集的颗粒的快速燃烧时，提供给柴油微粒过滤器的气体的流量增加。 或者，当确定基于颗粒过滤器的状态开始收集的微粒的快速燃烧时，提供给过滤器的气体的流量增加。
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公开(公告)号：US07028467B2
公开(公告)日：2006-04-18
申请号：US10776244
申请日：2004-02-12
IPC分类号： F01N3/00
CPC分类号： F01N9/005 , F01N9/002 , F01N2330/06 , F01N2430/08 , F01N2430/085 , F01N2510/065 , F02D41/029 , F02D41/1448 , F02D41/187 , F02D41/2441 , F02D41/2474 , F02D41/28 , F02D41/3827 , F02D2041/1422 , F02D2200/0404 , F02D2200/0414 , F02D2200/0812 , Y02T10/47
摘要： An engine exhaust emission control device determines a differential pressure across a diesel particulate filter (DPF) to enable regeneration of the DPF at optimal timing. An ECU estimates the temperature of a differential pressure sensor provided for the DPF from the output of an intake air temperature sensor when the engine is not running, and determines an offset correction factor for correcting the sensor's offset error. The factor is set using the sensor output at this time as sensor's offset error, and stored in a memory. When detecting the differential pressure across the DPF, the temperature of the sensor at this time is estimated, and an offset correction factor that corresponds to this estimated temperature is selected. The sensor outputs are adjusted with this offset correction factor.
摘要翻译： 发动机废气排放控制装置确定柴油机微粒过滤器（DPF）两端的差压，以便能够在最佳定时再生DPF。 当发动机未运行时，ECU从进气温度传感器的输出估计为DPF设置的差压传感器的温度，并且确定用于校正传感器偏移误差的偏移校正因子。 此时，使用传感器输出设置传感器的偏移量，并存储在存储器中。 当检测到DPF两端的差压时，估计此时的传感器的温度，并且选择对应于该估计温度的偏移校正因子。 传感器输出通过该偏移校正因子进行调整。
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公开(公告)号：US06829889B2
公开(公告)日：2004-12-14
申请号：US10460191
申请日：2003-06-13
IPC分类号： F01N300
CPC分类号： F01N9/005 , F01N9/002 , F01N11/00 , F01N11/002 , F01N11/005 , F01N2330/06 , F01N2430/085 , F01N2510/065 , F01N2550/00 , F02D41/029 , F02D41/1448 , F02D41/187 , F02D2200/0812 , Y02T10/47
摘要： The recycling timing schedule for a diesel particulate filter (DPF) can be easily and accurately determined. There is a differential pressure sensor that detects differential pressure &Dgr;P in the DPF, and an airflow meter that detects the flow velocity v in an exhaust path. An ECU calculates the quantity of deposited fine exhaust particles ML according to: ML=[&Dgr;P−(A&mgr;v+C&rgr;v2)]/(B&mgr;v+D&rgr;v2) Recycling of the filter is determined according to a determination formula used to compare the calculated deposited quantity ML to a reference quantity. In this way, the deposited quantity can be accurately obtained without using a map.
摘要翻译： 柴油颗粒过滤器（DPF）的回收时间表可以容易且准确地确定。 有一个差压传感器，用于检测DPF中的差压DeltaP，以及一个气流计，用于检测排气路径中的流速v。 ECU根据以下计算沉积的细排气颗粒ML的量：根据用于将计算出的沉积量ML与参考量进行比较的确定公式来确定过滤器的循环。 以这种方式，可以在不使用地图的情况下准确地获得沉积量。
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公开(公告)号：US08256207B2
公开(公告)日：2012-09-04
申请号：US12182380
申请日：2008-07-30
IPC分类号： F01N3/18
CPC分类号： F01N3/025 , F01N3/035 , F02D41/029 , F02D41/1445 , F02D2200/0804 , F02D2200/0812
摘要： An exhaust emission control device removes particulate matters contained in exhaust gas of an internal combustion engine and deposited in a particulate filter. The device has a catalyst judging block judging the catalytic activity of catalyst held in the particulate filter, an exhaust gas detecting block detecting a flow rate of the exhaust gas, an injection type selecting block selecting a first fuel injection type or a second fuel injection type according to the catalytic activity and the flow rate of the exhaust gas, and a fuel injection control block controlling fuel injected into the engine to heighten the temperature of the exhaust gas according to the first fuel injection type and to supply unburned hydrocarbons to the particulate filter according to the second fuel injection type.
摘要翻译： 废气排放控制装置去除内燃机废气中所含的颗粒物并沉积在颗粒过滤器中。 该装置具有判断保持在颗粒过滤器中的催化剂的催化活性的催化剂判定块，检测排气流量的废气检测块，选择第一燃料喷射型或第二燃料喷射型的喷射型选择块 根据催化活性和废气流量，以及燃料喷射控制块，其控制喷射到发动机中的燃料，以根据第一燃料喷射型提高废气的温度，并将未燃烧的碳氢化合物供应到颗粒过滤器 根据第二种燃油喷射型。
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公开(公告)号：US08151559B2
公开(公告)日：2012-04-10
申请号：US12155524
申请日：2008-06-05
IPC分类号： F01N3/00
CPC分类号： F02D41/029 , F01N3/035 , F01N9/002 , F02D41/0245 , F02D2200/0804 , F02D2200/0812
摘要： An exhaust purification device increases temperature of a particulate filter by at least one of a first temperature increase device and a second temperature increase device to combust and remove particulate matters deposited in a particulate filter. The second temperature increase device increases the temperature of the particulate filter to temperature higher than the temperature achieved by the first temperature increase device. An engine output at the time when the second temperature increase device performs the temperature increase operation is equal to an engine output at the time when the first temperature increase device performs the temperature increase operation. The exhaust purification device sets a ratio between an operation period of the first temperature increase device and an operation period of the second temperature increase device according to estimated temperature of the particulate filter.
摘要翻译： 排气净化装置通过第一升温装置和第二升温装置中的至少一个来增加颗粒过滤器的温度，以燃烧和除去沉积在颗粒过滤器中的颗粒物质。 第二升温装置将微粒过滤器的温度升高到高于由第一升温装置实现的温度的温度。 第二升温装置执行升温运转时的发动机输出等于第一升温装置进行升温运转时的发动机输出。 排气净化装置根据微粒过滤器的推定温度来设定第一升温装置的运转期间和第二升温装置的运转期间的比例。
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公开(公告)号：US20090037082A1
公开(公告)日：2009-02-05
申请号：US12182380
申请日：2008-07-30
CPC分类号： F01N3/025 , F01N3/035 , F02D41/029 , F02D41/1445 , F02D2200/0804 , F02D2200/0812
摘要： An exhaust emission control device removes particulate matters contained in exhaust gas of an internal combustion engine and deposited in a particulate filter. The device has a catalyst judging block judging the catalytic activity of catalyst held in the particulate filter, an exhaust gas detecting block detecting a flow rate of the exhaust gas, an injection type selecting block selecting a first fuel injection type or a second fuel injection type according to the catalytic activity and the flow rate of the exhaust gas, and a fuel injection control block controlling fuel injected into the engine to heighten the temperature of the exhaust gas according to the first fuel injection type and to supply unburned hydrocarbons to the particulate filter according to the second fuel injection type.
摘要翻译： 废气排放控制装置去除内燃机废气中所含的颗粒物并沉积在颗粒过滤器中。 该装置具有判断保持在颗粒过滤器中的催化剂的催化活性的催化剂判定块，检测排气流量的废气检测块，选择第一燃料喷射型或第二燃料喷射型的喷射型选择块 根据催化活性和废气流量，以及燃料喷射控制块，其控制喷射到发动机中的燃料，以根据第一燃料喷射型提高废气的温度，并将未燃烧的碳氢化合物供应到颗粒过滤器 根据第二种燃油喷射型。
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