公开(公告)号：US08132450B2

公开(公告)日：2012-03-13

申请号：US12670927

申请日：2009-04-14

申请人： Daisuke Shibata ,  Hiroshi Sawada ,  Taiga Hagimoto ,  Kazuhiro Wakao ,  Keisuke Sano ,  Kimikazu Yoda

发明人： Daisuke Shibata ,  Hiroshi Sawada ,  Taiga Hagimoto ,  Kazuhiro Wakao ,  Keisuke Sano ,  Kimikazu Yoda

IPC分类号： G01M15/10

CPC分类号： F01N11/002 ,  F01N3/2066 ,  F01N2550/02 ,  F01N2550/05 ,  F01N2560/026 ,  F01N2560/06 ,  F01N2610/02 ,  Y02T10/24 ,  Y02T10/47

摘要： In a malfunction diagnosis device for an exhaust gas purification system including an exhaust gas purification catalyst disposed in the exhaust passage of an internal combustion engine, and a reductant supply device that supplies reductant to exhaust gas that flows in an upstream side of the exhaust gas purification catalyst, the degree of degradation of the exhaust gas purification catalyst is diagnosed by comparing the timing at which the bed temperature of the exhaust gas purification catalyst starts to rise due to the heat of moisture adsorption reaction, against a normal value.

摘要翻译： 在一种排气净化系统的故障诊断装置中，该排气净化系统包括设置在内燃机的排气通路中的废气净化催化剂，以及还原剂供给装置，其向排气净化用上游侧的废气供给还原剂 通过将排气净化催化剂的床温度由于吸湿反应的热量开始上升的时间与正常值进行比较来诊断排气净化催化剂的劣化程度。

公开(公告)号：US20110000290A1

公开(公告)日：2011-01-06

申请号：US12922146

申请日：2008-05-21

申请人： Hiroshi Sawada ,  Daisuke Shibata

发明人： Hiroshi Sawada ,  Daisuke Shibata

IPC分类号： G01M15/10

CPC分类号： F02D41/222 ,  F01N3/2066 ,  F01N2550/00 ,  F01N2560/026 ,  F02D41/0275 ,  F02D41/1441 ,  F02D41/146 ,  F02D41/1461 ,  F02D41/1463 ,  Y02T10/40

摘要： An exhaust passage (15) of an internal-combustion engine (10) includes a selective reduction NOx catalyst (34) and an after-catalyst NOx sensor (50) for detecting a NOx concentration Cr at the downstream thereof. Reducing agent is selectively added from an addition valve (40) to the NOx catalyst. A NOx concentration Ce at the upstream side of the NOx catalyst is detected or estimated. NOx concentrations Cr and Ce before and after the NOx catalyst, which were detected or estimated during the stoppage of an addition of the reducing agent, are compared to each other to thereby determine an abnormality of the after-catalyst NOx sensor (50). An abnormality diagnosis is executed while the addition of reducing agent is being stopped to remove an influence by the NOx catalyst.

摘要翻译： 内燃机（10）的排气通路（15）包括用于检测下游的NOx浓度Cr的选择还原NOx催化剂（34）和催化剂后NOx传感器（50）。 从添加阀（40）向NOx催化剂选择性地添加还原剂。 检测或估计NOx催化剂上游侧的NOx浓度Ce。 将在还原剂添加停止期间检测或估计的NOx催化剂之前和之后的NOx浓度Cr和Ce彼此进行比较，从而确定催化剂后NOx传感器（50）的异常。 在停止添加还原剂以除去NOx催化剂的影响的同时执行异常诊断。

公开(公告)号：US07421333B2

公开(公告)日：2008-09-02

申请号：US10584775

申请日：2005-05-11

申请人： Hiroshi Sawada ,  Daisuke Shibata

发明人： Hiroshi Sawada ,  Daisuke Shibata

IPC分类号： B60T7/12 ,  F02M25/07

CPC分类号： F02D41/0052 ,  F01N3/035 ,  F01N3/0821 ,  F01N3/0842 ,  F02D41/1446 ,  F02D41/1454 ,  F02D41/187 ,  F02D41/222 ,  Y02T10/47

摘要： A technique is provided which can specify a member in which malfunction really occurs when there exists malfunction in at least one of a plurality of state values representing the state of an internal combustion engine. When an amount of fresh intake air is controlled by increasing and decreasing an amount of EGR gas in a feedback manner, and when an amount of fuel to be added to an exhaust gas is controlled based on an air fuel ratio sensor in a feedback manner, a determination is made, based on the result of comparison between output values and command values of members to be detected and corresponding reference values, as to in which member malfunction occurs. Such a determination is based on the fact that relations between output values and command values of the members to be detected and corresponding reference values in individual operating states are different from one another depending on sensors or devices in which malfunction occurs.

摘要翻译： 提供了一种技术，其可以指定在表示内燃机的状态的多个状态值中的至少一个中存在故障时真正发生故障的构件。 当通过以反馈方式增加和减少EGR气体的量来控制新鲜进气量时，并且当以反馈方式基于空燃比传感器控制添加到排气的燃料量时， 基于成员故障发生的输出值和要检测的构件的指令值和对应的参考值之间的比较的结果进行确定。 这样的判断基于以下事实：根据要发生故障的传感器或装置，要检测的构件的输出值和指令值之间的关系以及各个操作状态中的相应参考值彼此不同。

公开(公告)号：US08307699B2

公开(公告)日：2012-11-13

申请号：US12922146

申请日：2008-05-21

申请人： Hiroshi Sawada ,  Daisuke Shibata

发明人： Hiroshi Sawada ,  Daisuke Shibata

IPC分类号： G01M15/10

CPC分类号： F02D41/222 ,  F01N3/2066 ,  F01N2550/00 ,  F01N2560/026 ,  F02D41/0275 ,  F02D41/1441 ,  F02D41/146 ,  F02D41/1461 ,  F02D41/1463 ,  Y02T10/40

摘要： An exhaust passage (15) of an internal-combustion engine (10) includes a selective reduction NOx catalyst (34) and an after-catalyst NOx sensor (50) for detecting a NOx concentration Cr at the downstream thereof. Reducing agent is selectively added from an addition valve (40) to the NOx catalyst. A NOx concentration Ce at the upstream side of the NOx catalyst is detected or estimated. NOx concentrations Cr and Ce before and after the NOx catalyst, which were detected or estimated during the stoppage of an addition of the reducing agent, are compared to each other to thereby determine an abnormality of the after-catalyst NOx sensor (50). An abnormality diagnosis is executed while the addition of reducing agent is being stopped to remove an influence by the NOx catalyst.

摘要翻译： 内燃机（10）的排气通路（15）包括用于检测下游的NOx浓度Cr的选择还原NOx催化剂（34）和催化剂后NOx传感器（50）。 从添加阀（40）向NOx催化剂选择性地添加还原剂。 检测或估计NOx催化剂上游侧的NOx浓度Ce。 将在还原剂添加停止期间检测或估计的NOx催化剂之前和之后的NOx浓度Cr和Ce彼此进行比较，从而确定催化剂后NOx传感器（50）的异常。 在停止添加还原剂以除去NOx催化剂的影响的同时执行异常诊断。

公开(公告)号：US20110314792A1

公开(公告)日：2011-12-29

申请号：US12677277

申请日：2009-02-24

申请人： Daisuke Shibata ,  Koichi Kitaura ,  Hiroshi Sawada ,  Tatsuya Tsuji

发明人： Daisuke Shibata ,  Koichi Kitaura ,  Hiroshi Sawada ,  Tatsuya Tsuji

IPC分类号： F01N11/00

CPC分类号： F01N3/025 ,  F01N9/002 ,  F01N11/002 ,  F01N2550/04 ,  F01N2900/0601 ,  F01N2900/1606 ,  Y02T10/47

摘要： The invention intends to provide a technology which makes it possible to diagnose with higher accuracy whether or not abnormality occurs in a filter regeneration system causing excessive execution frequency of a regeneration process. The filter regeneration system initiates execution of the regeneration process, incase an estimated particulate matter (PM) accumulation amount at the filter reaches a pre-determined regeneration requiring accumulation amount; or in case the pressure upstream of the filter or the differential pressure across the filter reaches a pre-determined regeneration requiring value, the value being larger than the pressure or the differential pressure corresponding to the regeneration requiring accumulation amount. Then, the diagnosis is carried out based on a ratio of an estimated PM accumulation amount at the initiation of the execution of the regeneration process to the regeneration requiring accumulation amount.

摘要翻译： 本发明旨在提供一种能够以更高精度诊断导致再生处理的过度执行频率的过滤器再生系统中发生异常的技术。 过滤器再生系统启动再生处理的执行，使得在过滤器处的估计的颗粒物质（PM）累积量达到预定的再生需要累积量; 或者在过滤器上游的压力或过滤器上的压差达到预定的再生需求值的情况下，该值大于对应于再生需要累积量的压力或压差。 然后，基于再生处理开始时的估计PM积累量与再生需求累积量的比例进行诊断。

公开(公告)号：US08074442B2

公开(公告)日：2011-12-13

申请号：US11629998

申请日：2005-06-21

申请人： Hiroshi Sawada ,  Daisuke Shibata ,  Keisuke Fukuoka

发明人： Hiroshi Sawada ,  Daisuke Shibata ,  Keisuke Fukuoka

IPC分类号： F01N3/00

CPC分类号： F01N11/002 ,  F01N3/035 ,  F01N11/005 ,  F01N13/009 ,  F01N2550/04 ,  F01N2900/0422 ,  F02D41/0055 ,  F02D41/12 ,  Y02T10/47

摘要： An object of the invention is to realize a method of determining an abnormality in a particulate filter (5) capable of trapping and oxidizing particulate matter contained in exhaust gas in which even a minor abnormality in which small quantity of particulate matter can pass through the particulate filter (5) can be determined with a high degree of accuracy. To achieve this object, the abnormality determination method according to the invention, the transition of the inflowing exhaust gas temperature in and the outflowing exhaust gas temperature out of the particulate filter (5) during deceleration operating, and the degree of decrease in the outflowing exhaust gas temperature relative to the inflowing exhaust gas temperature is computed based on the transition. If the degree of decrease exceeds a threshold value, it is determined that the particulate filter (5) is abnormal.

摘要翻译： 本发明的目的是实现一种确定能够捕集和氧化废气中所含的颗粒物质的颗粒过滤器（5）的异常的方法，其中即使少量颗粒物质可以通过颗粒物的微小异常 过滤器（5）可以高精度地确定。 为了达到这个目的，根据本发明的异常判定方法，减速运转时，从微粒过滤器（5）流出的废气温度和排出废气温度的过渡以及排出的排气量的减少程度 基于转变计算相对于流入的废气温度的气体温度。 如果降低程度超过阈值，则确定微粒过滤器（5）异常。

公开(公告)号：US20100115918A1

公开(公告)日：2010-05-13

申请号：US12594753

申请日：2008-11-14

申请人： Hiroshi Sawada ,  Daisuke Shibata

发明人： Hiroshi Sawada ,  Daisuke Shibata

IPC分类号： F01N11/00 ,  G01M15/10

CPC分类号： F01N3/2066 ,  B01D53/30 ,  B01D53/9409 ,  B01D53/9477 ,  B01D53/9495 ,  B01D2251/2067 ,  B01D2255/1021 ,  F01N3/035 ,  F01N3/08 ,  F01N11/00 ,  F01N2550/05 ,  F01N2560/00 ,  F01N2560/021 ,  F01N2560/026 ,  F01N2560/06 ,  F01N2560/14 ,  F01N2570/14 ,  F01N2610/02 ,  F01N2900/1808 ,  Y02A50/2344 ,  Y02T10/24 ,  Y02T10/47

摘要： In an exhaust purification system having a urea addition device adding a urea aqueous solution to an NOx catalyst of selective reduction type provided in an exhaust passage in an internal combustion engine, a sensor detecting an ammonia concentration is provided at the downstream side of the NOx catalyst. During fuel cut, a predetermined amount of urea aqueous solution is added. Then, based on a sensor output obtained at this time, an abnormality in at least one of the urea addition device and the urea aqueous solution is detected. The addition of the urea aqueous solution during the fuel cut prevents reactive consumption between urea and NOx. The sensor output corresponding to the amount of the urea aqueous solution is obtained. This output condition is compared with a normal one to allow determination of whether or not an appropriate amount of urea aqueous solution of appropriate quality has been added.

摘要翻译： 在具有将尿素水溶液添加到设置在内燃机的排气通路中的选择还原型的NOx催化剂的尿素添加装置的排气净化系统中，在NOx催化剂的下游侧设置有检测氨浓度的传感器 。 在燃料切断期间，加入预定量的尿素水溶液。 然后，基于此时获得的传感器输出，检测到尿素添加装置和尿素水溶液中的至少一个的异常。 在燃料切断期间加入尿素水溶液可防止尿素和NOx之间的反应性消耗。 获得对应于尿素水溶液量的传感器输出。 将该输出条件与正常输出条件进行比较，以确定是否已经添加了适当量的适当质量的尿素水溶液。

公开(公告)号：US20100089371A1

公开(公告)日：2010-04-15

申请号：US12593001

申请日：2008-03-25

申请人： Daisuke Shibata ,  Hiroshi Sawada ,  Go Ohara

发明人： Daisuke Shibata ,  Hiroshi Sawada ,  Go Ohara

IPC分类号： F02M25/07 ,  F02B47/08

CPC分类号： F02D41/0007 ,  F02B29/0406 ,  F02B37/12 ,  F02D41/0072 ,  F02D41/18 ,  F02D41/221 ,  F02D2200/0406 ,  F02M26/05 ,  F02M26/49 ,  Y02T10/144 ,  Y02T10/47

摘要： A forced air induction system for an internal combustion engine (1) has: a forced air induction device; an EGR valve (10) provided in an EGR passage (9) connecting an intake air passage (14) and an exhaust gas passage (6); and a diagnosis device (20) adapted to execute an abnormality diagnosis for the forced air induction device based on a deviation of the actual boost pressure at the forced air induction device from a target boost pressure. The diagnosis device inhibits execution of the abnormality diagnosis when the operation state of the EGR valve is out of a normal operation range specifically determined.

摘要翻译： 用于内燃机（1）的强制空气感应系统具有：强制空气感应装置; 设置在连接进气通道（14）和排气通道（6）的EGR通路（9）中的EGR阀（10） 以及诊断装置（20），其适于基于强制空气感应装置处的实际增压压力与目标增压压力的偏差来执行强制空气感应装置的异常诊断。 当EGR阀的操作状态不在特定确定的正常操作范围内时，诊断装置禁止执行异常诊断。

公开(公告)号：US20100018186A1

公开(公告)日：2010-01-28

申请号：US12303500

申请日：2007-06-07

申请人： Daisuke Shibata ,  Hiroshi Sawada ,  Keisuke Fukuoka

发明人： Daisuke Shibata ,  Hiroshi Sawada ,  Keisuke Fukuoka

IPC分类号： F01N11/00

CPC分类号： B01D46/0086 ,  B01D2279/30 ,  F01N3/103 ,  F01N9/007 ,  F01N11/002 ,  F01N13/0097 ,  F01N2550/04 ,  F01N2560/08 ,  F01N2900/0412 ,  F01N2900/1406 ,  F02B37/00 ,  Y02T10/47

摘要： An object of the present invention is to provide a technology that enables detection of a fault of a PM trapper with improved accuracy. In the present invention, a pressure sensor 20 that measures a differential pressure across a PM trapper 11 is provided, and a fault of a PM trapper is determined based on an amount of change in the differential pressure across the PM trapper 11 between two different operation states of an internal combustion engine 1 in which the ambient temperature around the pressure sensor 20 falls within a specific temperature range. Since variations in the offset error of the differential pressure sensor 20 caused by changes in the ambient temperature around the differential pressure sensor 20 is made small, the amount of change in the differential pressure across the PM trapper 11 can be measured more accurately, and a fault of the PM trapper 11 can be detected with improved accuracy.

摘要翻译： 本发明的目的是提供一种能够以更高精度检测PM捕集器的故障的技术。 在本发明中，提供了测量PM捕集器11两端的压差的压力传感器20，根据在两个不同操作之间的PM捕集器11的差压的变化量来确定PM捕集器的故障 内燃机1的状态，其中压力传感器20周围的环境温度落在特定温度范围内。 由于差压传感器20周围的环境温度的变化引起的差压传感器20的偏移误差的偏差变小，所以可以更精确地测定PM捕集器11的差压的变化量， 可以提高精度来检测PM捕集器11的故障。

公开(公告)号：US07520274B2

公开(公告)日：2009-04-21

申请号：US11630863

申请日：2005-06-29

申请人： Hiroshi Sawada ,  Daisuke Shibata

发明人： Hiroshi Sawada ,  Daisuke Shibata

IPC分类号： F02D41/00 ,  F01N3/00

CPC分类号： F01N3/0814 ,  F01N3/0842 ,  F01N13/0097 ,  F01N2550/00 ,  F01N2560/02 ,  F01N2610/03 ,  F02D41/0275 ,  F02D41/028 ,  F02D41/1454 ,  F02D41/1474 ,  F02D41/1495

摘要： In a compression ignition internal combustion engine provided with an NOx storage-reduction catalyst on an exhaust system, when the air fuel ratio of the exhaust gas being in a lean state is controlled to a rich state, a response time (ResS) from a time point an air fuel ratio sensor detects a first air fuel ratio (AF1), which is leaner than a stoichiometric air fuel ratio (AFS), to a time point the air fuel ratio sensor detects a second air fuel ratio (AF2), which is equal to or leaner than the stoichiometric air fuel ratio (AFS) and richer than the first air fuel ratio (AF1). When the response time (ResS) exceeds a stoichiometric air fuel ratio shift reference time (StdS), a determination is made that the air fuel ratio sensor is degraded.

摘要翻译： 在排气系统中设有NOx吸留还原催化剂的压缩点火式内燃机中，当将处于稀薄状态的排气的空燃比控制为浓状态时，从时间起响应时间（ResS） 将空燃比传感器检测到比理论空燃比（AFS）更稀的第一空燃比（AF1）到空燃比传感器检测到第二空燃比（AF2）的时间点 等于或者比化学计量空燃比（AFS）更稀，并且比第一空气燃料比（AF1）更浓。 当响应时间（ResS）超过理论空燃比偏移基准时间（StdS）时，确定空燃比传感器劣化。