公开(公告)号：US20090205318A1

公开(公告)日：2009-08-20

申请号：US12305123

申请日：2007-06-18

申请人： Daisuke Shibata ,  Hiroshi Sawada ,  Keisuke Fukuoka

发明人： Daisuke Shibata ,  Hiroshi Sawada ,  Keisuke Fukuoka

IPC分类号： F01N11/00 ,  G01M15/10

CPC分类号： B01D46/0086 ,  B01D2279/30 ,  F01N11/002 ,  F01N2550/04 ,  F01N2560/06 ,  Y02T10/47

摘要： An object of the present invention is to provide a technology that enables to detect a fault of a PM trapper with improved accuracy. According to the present invention, a plurality of temperature sensors 10 are provided in an exhaust passage 9 just downstream of a PM trapper 17 in such a way that their temperature detection elements are positioned on a plane that is perpendicular to an imaginary center axis of the exhaust passage 9. A change in the radial direction temperature distribution of the exhaust gas flowing out of the PM trapper 17 upon occurrence of a fault in the PM trapper 17 is detected from measurement values of the temperature sensors 10, and a fault of the PM trapper 17 is detected based on this radial direction temperature distribution. Since the measurement values of the temperature sensors 10 are unlikely to be affected by the amount of PM deposited on the PM trapper 17, detection of a fault of the PM trapper 17 can be achieved with improved accuracy.

摘要翻译： 本发明的目的是提供一种技术，其能够以提高的精度检测PM捕集器的故障。 根据本发明，多个温度传感器10设置在PM捕集器17正下游的排气通道9中，使得它们的温度检测元件位于垂直于 在PM捕集器17发生故障时从PM捕集器17流出的废气的径向温度分布的变化是从温度传感器10的测量值和PM的故障中检测出的 基于该径向温度分布检测捕集器17。 由于温度传感器10的测量值不太可能受到PM捕集器17上沉积的PM的影响，所以可以提高精度来检测PM捕集器17的故障。

公开(公告)号：US08495861B2

公开(公告)日：2013-07-30

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： F01N3/021

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：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：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：US20080041035A1

公开(公告)日：2008-02-21

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： F01N11/00

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：US08806928B2

公开(公告)日：2014-08-19

申请号：US13695372

申请日：2010-04-30

申请人： Daisuke Shibata ,  Hiroshi Sawada ,  Toru Kidokoro ,  Akihiko Itakura

发明人： Daisuke Shibata ,  Hiroshi Sawada ,  Toru Kidokoro ,  Akihiko Itakura

IPC分类号： G01M15/10

CPC分类号： G01M15/10 ,  F01N11/002 ,  F01N2550/02 ,  Y02T10/47

摘要： Provision is made for a catalyst that is arranged in an exhaust passage of an internal combustion engine and has an oxidation function, downstream side temperature detection means that detects the temperature of an exhaust gas at a downstream side from the catalyst, and addition means that adds a reducing agent into the exhaust gas from an upstream side from the catalyst, wherein there are also provided correlation value calculation means that calculates a correlation value which is correlated with an amount of change of the temperature detected by the downstream side temperature detection means when the reducing agent is added by the addition means and when a transient operation of the internal combustion engine is carried out, and determination means that determines a deterioration of the catalyst by making a comparison between the correlation value and a threshold value which indicates the deterioration of the catalyst.

摘要翻译： 设置有布置在内燃机的排气通道中并具有氧化功能的催化剂，下游侧温度检测装置，其检测催化剂下游侧的废气的温度，以及添加装置 还原剂从催化剂的上游侧排入废气中，其中还提供相关值计算装置，其计算与当下游侧温度检测装置检测到的温度的变化量相关的相关值时 通过加法装置添加还原剂，并且当进行内燃机的瞬时运转时，以及通过比较相关值和指示劣化的阈值来确定催化剂的劣化的确定装置 催化剂。

公开(公告)号：US08240130B2

公开(公告)日：2012-08-14

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： F01N3/00 ,  F01N3/10 ,  F02B77/08 ,  F02D17/04 ,  F02M63/02

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：US08171723B2

公开(公告)日：2012-05-08

申请号：US12674445

申请日：2008-12-04

申请人： Taiga Hagimoto ,  Hiroshi Sawada ,  Daisuke Shibata

发明人： Taiga Hagimoto ,  Hiroshi Sawada ,  Daisuke Shibata

IPC分类号： F01N11/00 ,  F01N3/20

CPC分类号： F01N3/2066 ,  F01N11/00 ,  F01N2550/02 ,  F01N2550/03 ,  F01N2550/05 ,  F01N2560/026 ,  F01N2560/06 ,  F01N2570/14 ,  F01N2610/02 ,  Y02A50/2344 ,  Y02T10/24 ,  Y02T10/47

摘要： When the NOx SCR catalyst (15) deteriorates, the NOx removal efficiency increases with an increase in the catalyst temperature as indicated by the curves B1 and B2. When there is an irregularity in the amount or quality of aqueous urea solution that is supplied to the NOx SCR catalyst, the NOx removal efficiency decreases at a constant rate as indicated by the curve C. When the NOx removal efficiency is first within the region X2 and then brought into the region Y1, it is determined that the NOx SCR catalyst deteriorates. When the NOx removal efficiency is first within the region X2 and then brought into the region Y2, it is determined that there is an irregularity in the amount or quality of the aqueous urea solution that is supplied to the NOx SCR catalyst.

摘要翻译： 当NOx SCR催化剂（15）劣化时，如由曲线B1和B2所示，NOx去除效率随着催化剂温度的升高而增加。 当供给到NOx SCR催化剂的尿素水溶液的量或质量不均匀时，NOx去除效率以曲线C所示的恒定速率降低。当NOx去除效率首先在区域X2内时 然后进入区域Y1，确定NOx SCR催化剂劣化。 当NOx去除效率首先在区域X2内并且然后进入区域Y2时，确定供应到NOx SCR催化剂的尿素水溶液的量或质量存在不规则性。

公开(公告)号：US07980059B2

公开(公告)日：2011-07-19

申请号：US12097072

申请日：2006-12-14

申请人： Daisuke Shibata ,  Hiroshi Sawada

发明人： Daisuke Shibata ,  Hiroshi Sawada

IPC分类号： F01N3/00

CPC分类号： B01D53/9431 ,  B01D53/9495 ,  F01N3/0807 ,  F01N3/0842 ,  F01N3/0878 ,  F01N3/2053 ,  F01N3/206 ,  F01N11/00 ,  F01N2550/03 ,  F01N2560/026 ,  Y02T10/47

摘要： An object is to estimate the degree of deterioration of an NOx catalyst with improved accuracy in an exhaust gas purification system having the NOx catalyst provided in an exhaust passage. According to the present invention, an NOx sensor is provided downstream of an NOx catalyst, and the difference between an estimated value of the NOx concentration in the exhaust gas in the exhaust passage upstream of the NOx catalyst and a detection value of the NOx sensor at a time when NOx in the exhaust gas is not removed in the NOx catalyst is calculated. In addition, in estimating the degree of deterioration of the NOx catalyst, the estimated value of the NOx concentration in the exhaust gas in the exhaust passage upstream of the NOx catalyst is corrected based on this difference, and the degree of deterioration of the NOx catalyst is estimated based on the difference between this corrected value and the detection value of the NOx sensor.

摘要翻译： 本发明的目的是在具有设置在排气通路中的NOx催化剂的排气净化系统中，通过提高精度来估计NOx催化剂的劣化程度。 根据本发明，NOx传感器设置在NOx催化剂的下游，NOx排出通道上游排气中的排气中NOx浓度的估计值与NOx传感器的检测值之间的差值 计算在NOx催化剂中未排出废气中的NOx的时间。 此外，在推定NOx催化剂的劣化程度时，基于该差异来校正NOx催化剂上游排气通路中的排气中的NOx浓度的推定值，NOx催化剂的劣化程度 基于该校正值与NOx传感器的检测值之间的差异来估计。

公开(公告)号：US07849672B2

公开(公告)日：2010-12-14

申请号：US11790028

申请日：2007-04-23

申请人： Daisuke Shibata ,  Hiroshi Sawada ,  Satoru Maeda

发明人： Daisuke Shibata ,  Hiroshi Sawada ,  Satoru Maeda

IPC分类号： F01N3/00

CPC分类号： F01N11/00 ,  F01N3/0253 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/36 ,  F01N2550/05 ,  F01N2610/03 ,  F02D41/221 ,  F02D41/402 ,  Y02T10/47

摘要： An object of the invention is to diagnose a failure of an addition valve provided in the exhaust system of an internal combustion engine. To achieve the object, post injection through a fuel injection valve of the internal combustion engine and reducing agent addition through the reducing agent addition valve are performed at different timings, the quantity of fuel injected through the fuel injection valve when the post injection is performed and the quantity of reducing agent added through the reducing agent addition valve when the reducing agent addition is performed are estimated based on a same parameter, and it is diagnosed that the reducing agent addition valve has a failure on condition that the difference between the estimated fuel quantity and the estimated reducing agent quantity exceeds a predetermined quantity.

摘要翻译： 本发明的目的是诊断设置在内燃机的排气系统中的添加阀的故障。 为了实现该目的，通过内燃机的燃料喷射阀和通过还原剂添加阀添加的还原剂的后喷射在不同的时刻进行，在执行后喷射时通过燃料喷射阀喷射的燃料量;以及 在进行还原剂添加时，通过还原剂添加阀添加的还原剂的量基于相同的参数来推定，并且在诊断为还原剂添加阀具有失效的条件下，估计燃料量 并且估计的还原剂量超过预定量。