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1.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：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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公开(公告)号：US06571765B2
公开(公告)日：2003-06-03
申请号：US10261627
申请日：2002-10-02
IPC分类号： F01L134
CPC分类号： F02D35/025 , F02B29/0406 , F02D15/00 , F02D41/0065 , F02D41/086 , F02D41/1446 , F02D41/401 , F02D2041/0067 , F02D2250/36 , F02M26/05 , F02M26/10 , F02M26/28 , F02M26/33 , Y02T10/44 , Y02T10/47
摘要： The engine control system has an ECU that supplies relatively large amount of EGR gas and delays an injection timing in order to decrease temperature in a combustion chamber. When an engine is operated under a warming up operation or a low engine load, the ECU deactivates an EGR cooler to increase intake air temperature in order to stabilize engine operation. When the engine is operated under a high engine load, the ECU activates the EGR cooler, delays a closing timing of an intake valve, and increases a boost pressure of a forced induction system. As a result, both of a compression end temperature and a maximum combustion temperature are decreased so that emissions of NOx and particulates are reduced.
摘要翻译： 发动机控制系统具有提供相对大量的EGR气体并延迟喷射正时以便降低燃烧室中的温度的ECU。 当发动机在预热操作或低发动机负荷下操作时，ECU停用EGR冷却器以增加进气温度，以稳定发动机运转。 当发动机在高发动机负荷下操作时，ECU启动EGR冷却器，延迟进气门的关闭时间，并且增加强制感应系统的增压压力。 结果，减小了压缩端温度和最大燃烧温度，从而降低了NOx和微粒的排放。
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公开(公告)号：US06735941B2
公开(公告)日：2004-05-18
申请号：US10420867
申请日：2003-04-23
IPC分类号： F01N300
CPC分类号： F02D41/029 , F01N3/023 , F01N2330/06 , F02D2200/0812
摘要： An engine control unit of an exhaust gas purification system of an internal combustion engine measures a pressure difference between an upstream and a downstream of a diesel particulate filter (DPF) after heating the DPF at least to a predetermined temperature and maintaining the DPF at the temperature for a while. The DPF is disposed in an exhaust pipe of the engine. A soluble organic fraction included in particulate matters in exhaust gas can be eliminated at the predetermined temperature. The ECU calculates a quantity of the particulate matters trapped by the DPF from the measured pressure difference. Thus, the quantity of the trapped particulate matters is calculated precisely, independently of a composition of the particulate matters or a state of the soluble organic fraction.
摘要翻译： 内燃机的排气净化系统的发动机控制单元在DPF加热至少达到预定温度之后测量柴油机微粒过滤器（DPF）的上游和下游之间的压差，并将DPF维持在温度 一段时间。 DPF设置在发动机的排气管中。 废气中的颗粒物中包含的可溶性有机馏分可以在预定温度下消除。 ECU根据测量的压力差计算由DPF捕集的颗粒物质的量。 因此，与颗粒物质的组成或可溶性有机部分的状态无关地精确地计算被捕获的颗粒物质的量。
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公开(公告)号：US06951100B2
公开(公告)日：2005-10-04
申请号：US10722569
申请日：2003-11-28
CPC分类号： F02D41/029 , F01N9/002 , F01N2330/06 , F01N2430/06 , F01N2430/08 , F01N2430/085 , F01N2510/065 , F02D41/0055 , F02D41/1446 , F02D41/1448 , F02D41/187 , F02D2200/0812 , F02D2200/602 , F02M26/13
摘要： An electronic control unit (an ECU) detects an operating condition of an engine and quantity of particulate matters accumulated in a diesel particulate filter (a DPF) having an oxidation catalyst from a pressure difference across the DPF. The ECU operates temperature increasing means for regenerating the DPF based on the above detection results. During a low speed and light load operation, the ECU does not perform temperature increasing operation similar to an operation performed during a middle load operation. Instead, the ECU performs operation such as reduction of recirculated exhaust gas quantity in order to inhibit an increase in the quantity of the accumulated particulate matters. When the operating condition is changed afterward, the temperature increasing means is operated, so safe regeneration of the DPF is achieved.
摘要翻译： 电子控制单元（ECU）从DPF的压力差检测发动机的运转状态和积聚在具有氧化催化剂的柴油机微粒过滤器（DPF）中的颗粒物质的量。 ECU根据上述检测结果，操作升温装置，再生DPF。 在低速轻负载操作期间，ECU不执行类似于在中间负载操作期间执行的操作的升温操作。 替代地，ECU执行诸如减少再循环废气量的操作，以便抑制积聚的颗粒物质的量的增加。 当操作条件变化之后，升温装置被操作，从而实现了DPF的安全再生。
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公开(公告)号：US06826903B2
公开(公告)日：2004-12-07
申请号：US10440140
申请日：2003-05-19
IPC分类号： F01N300
摘要： An exhaust gas recirculation (EGR) system of an internal combustion engine has an EGR cooler in an EGR passage connecting an exhaust manifold with an intake manifold. The EGR cooler cools EGR gas recirculated through the EGR passage. Cooling performance detecting means included in an electronic control unit (ECU) determines that cooling performance of the EGR cooler is degraded when intake pressure measured by an intake pressure sensor is lower than a normal intake pressure by at least a predetermined value. When the degradation of the cooling performance is detected, cooling performance regeneration controlling means included in the ECU increases the temperature inside the EGR cooler by heating the exhaust gas to eliminate soot or unburned hydrocarbon by oxidization. Thus, the cooling performance of the EGR cooler is regenerated.
摘要翻译： 内燃机的废气再循环（EGR）系统在排气歧管与进气歧管连接的EGR通路中具有EGR冷却器。 EGR冷却器冷却通过EGR通道再循环的EGR气体。 包括在电子控制单元（ECU）中的冷却性能检测装置确定当由进气压力传感器测量的进气压力低于正常进气压力至少预定值时，EGR冷却器的冷却性能降低。 当检测到冷却性能的劣化时，包括在ECU中的冷却性能再生控制装置通过加热废气以通过氧化来消除烟灰或未燃烧的烃来增加EGR冷却器内部的温度。 因此，再生EGR冷却器的冷却性能。
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公开(公告)号：US20070044459A1
公开(公告)日：2007-03-01
申请号：US11514146
申请日：2006-09-01
IPC分类号： F01N3/00
CPC分类号： F01N9/002 , F01N3/023 , F01N11/002 , F01N11/005 , Y02T10/47
摘要： An exhaust gas purifying apparatus for an internal combustion engine includes a collector, which collects exhaust particles in exhaust gas. The apparatus computes a pressure-difference-based measured value of a collected amount of the particles based on a pressure difference, and computes a pressure-difference-based estimated value by correcting the measured value. The apparatus computes an operational-state-based estimated value of the collected amount. The apparatus regenerates the collector by burning the exhaust particles when one of the pressure-difference-based estimated value and the operational-state-based estimated value reaches a predetermined value. The apparatus computes a current pressure-difference-based estimated value by correcting a current pressure-difference-based measured value based on information related to an immediately preceding operational-state-based computing period such that the current pressure-difference-based estimated value ranges from the current measured value to a previous pressure-difference-based estimated value.
摘要翻译： 用于内燃机的废气净化装置包括收集器，其收集废气中的废气颗粒。 该装置基于压力差计算收集量的颗粒的基于压差的测量值，并通过校正测量值来计算基于压差的估计值。 该装置计算采集量的基于操作状态的估计值。 当基于压差的估计值和基于操作状态的估计值之一达到预定值时，设备通过燃烧排气颗粒来再生收集器。 该装置通过基于与前一个基于操作状态的计算周期相关的信息来校正当前基于压力差的测量值来计算当前基于压力差的估计值，使得当前基于压力差的估计值范围 从当前测量值到先前基于压差的估计值。
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公开(公告)号：US07243491B2
公开(公告)日：2007-07-17
申请号：US10845066
申请日：2004-05-14
IPC分类号： F01N3/02
CPC分类号： F02D41/0245 , F01N3/035 , F01N13/009 , F02D41/029 , F02D41/405 , F02D2200/0804 , Y02T10/26 , Y02T10/44
摘要： A diesel oxidation catalyst is disposed upstream of a diesel particulate filter (a DPF) disposed in an exhaust passage of a diesel engine. An electronic control unit (an ECU) operates a temperature increasing circuit, which performs post-injection, to eliminate particulate matters accumulated in the DPF. The ECU includes a first correcting circuit and a second correcting circuit. The first correcting circuit corrects a manipulated variable of the temperature increasing circuit based on a result of comparison between a target temperature and a temperature of the DPF estimated based on information related to an area upstream of the DPF. The second correcting circuit corrects the manipulated variable of the temperature increasing circuit based on a result of comparison between the target temperature and the temperature of the DPF estimated based on information related to an area downstream of the DPF.
摘要翻译： 柴油机氧化催化剂设置在设置在柴油发动机的排气通道中的柴油机微粒过滤器（DPF）的上游。 电子控制单元（ECU）操作执行后喷射的升温电路，以消除积聚在DPF中的颗粒物质。 ECU包括第一校正电路和第二校正电路。 第一校正电路基于目标温度和基于与DPF上游区域相关的信息估计的DPF的温度之间的比较结果来校正升温电路的操作变量。 第二校正电路基于目标温度和基于与DPF下游的区域相关的信息估计的DPF的温度之间的比较结果来校正升温电路的操作变量。
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公开(公告)号：US07152392B2
公开(公告)日：2006-12-26
申请号：US10676259
申请日：2003-10-02
CPC分类号： F01N11/002 , F01N11/005 , Y02T10/22 , Y02T10/47
摘要： A diesel particulate filter (DPF) having an oxidation catalyst is disposed between exhaust pipes of an internal combustion engine. An exhaust gas temperature sensor senses outlet gas temperature of the DPF. An engine control unit (ECU) calculates estimated central temperature of the DPF from an output of the exhaust gas temperature sensor with the use of an inverse transfer function of a change in the outlet gas temperature with respect to a change in temperature of the DPF. Based on the estimated temperature, the ECU performs excessive temperature increase prevention control or regeneration control of the DPF. The transfer function is simply expressed with first-order lag and dead time. A time constant of the first-order lag and the dead time are set in accordance with an exhaust gas flow rate.
摘要翻译： 具有氧化催化剂的柴油微粒过滤器（DPF）设置在内燃机的排气管之间。 废气温度传感器检测出DPF的出口气体温度。 发动机控制单元（ECU）使用相对于DPF的温度变化的出口气体温度的变化的逆转移函数，从排气温度传感器的输出来计算DPF的中央温度。 基于估计的温度，ECU执行过度的温度增加防止控制或DPF的再生控制。 传递函数简单地表示为一阶滞后和死区时间。 根据废气流量来设定一阶滞后和死区时间的时间常数。
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公开(公告)号：US07614219B2
公开(公告)日：2009-11-10
申请号：US11514146
申请日：2006-09-01
IPC分类号： F01N3/025
CPC分类号： F01N9/002 , F01N3/023 , F01N11/002 , F01N11/005 , Y02T10/47
摘要： An exhaust gas purifying apparatus for an internal combustion engine includes a collector, which collects exhaust particles in exhaust gas. The apparatus computes a pressure-difference-based measured value of a collected amount of the particles based on a pressure difference, and computes a pressure-difference-based estimated value by correcting the measured value. The apparatus computes an operational-state-based estimated value of the collected amount. The apparatus regenerates the collector by burning the exhaust particles when one of the pressure-difference-based estimated value and the operational-state-based estimated value reaches a predetermined value. The apparatus computes a current pressure-difference-based estimated value by correcting a current pressure-difference-based measured value based on information related to an immediately preceding operational-state-based computing period such that the current pressure-difference-based estimated value ranges from the current measured value to a previous pressure-difference-based estimated value.
摘要翻译： 用于内燃机的废气净化装置包括收集器，其收集废气中的废气颗粒。 该装置基于压力差计算收集量的颗粒的基于压差的测量值，并通过校正测量值来计算基于压差的估计值。 该装置计算采集量的基于操作状态的估计值。 当基于压差的估计值和基于操作状态的估计值之一达到预定值时，设备通过燃烧排气颗粒来再生收集器。 该装置通过基于与前一个基于操作状态的计算周期相关的信息来校正当前基于压力差的测量值来计算当前基于压力差的估计值，使得当前基于压力差的估计值范围 从当前测量值到先前基于压差的估计值。
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