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。

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：US20080028829A1

公开(公告)日：2008-02-07

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： G01M15/10

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） 指出空燃比传感器将空燃比传感器检测到第二空气燃料比（AF2）的时间点检测为比化学计量空燃比（AFS）更稀的第一空燃比（AF 1） 其等于或者比理论空燃比（AFS）更稀，并且比第一空气燃料比（AF 1）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。

公开(公告)号：US08845783B2

公开(公告)日：2014-09-30

申请号：US13637586

申请日：2010-03-26

申请人： Kazuya Takaoka ,  Daisuke Shibata ,  Hiroshi Sawada ,  Toru Kidokoro

发明人： Kazuya Takaoka ,  Daisuke Shibata ,  Hiroshi Sawada ,  Toru Kidokoro

IPC分类号： B01D46/30 ,  B01D50/00 ,  B01D39/14 ,  B01D39/20 ,  B01D39/06 ,  B01D24/00 ,  F01N3/025 ,  F01N9/00 ,  F01N11/00 ,  F01N3/035 ,  F02D41/14

CPC分类号： F01N11/002 ,  F01N3/0253 ,  F01N3/035 ,  F01N9/002 ,  F01N11/00 ,  F01N2550/04 ,  F01N2560/05 ,  F01N2900/0408 ,  F01N2900/0412 ,  F01N2900/0601 ,  F01N2900/1606 ,  F02D41/1466 ,  F02D41/1467 ,  F02D2200/0812 ,  Y02T10/47

摘要： The present invention is intended to detect a failure of a PM filter with a higher degree of accuracy. The present invention is provided with: a PM trapping efficiency calculation part to calculate a PM trapping efficiency (which is a proportion of an amount of particulate matter trapped with respect to an amount of inflow particulate matter) based on an amount of inflow particulate matter obtained by an inflow particulate matter obtaining part, and an amount of outflow particulate matter detected by a PM sensor; and a failure detection part to make a determination that a failure has occurred in the PM filter, in cases where there has appeared a tendency for the PM trapping efficiency to decrease during a period of time until the execution of the following filter regeneration processing is started after the completion of execution of the filter regeneration processing.

摘要翻译： 本发明旨在以更高的精度检测PM滤波器的故障。 本发明提供了一种PM捕集效率计算部，其基于所获得的流入粒子物质的量，计算PM捕集效率（其相对于流入粒子物质的量捕获的颗粒物质的量的比例） 通过流入颗粒物获取部分和由PM传感器检测的流出颗粒物质的量; 以及故障检测部，在PM滤波器中发生故障发生的判定的情况下，在直到执行以下的滤波再生处理开始之前，PM捕集效率在一段时间内降低的倾向的情况下 完成执行过滤器再生处理。

公开(公告)号：US20140216020A1

公开(公告)日：2014-08-07

申请号：US13580325

申请日：2011-09-06

申请人： Daisuke Shibata ,  Toru Kidokoro ,  Hiroshi Sawada ,  Kazuya Takaoka

发明人： Daisuke Shibata ,  Toru Kidokoro ,  Hiroshi Sawada ,  Kazuya Takaoka

IPC分类号： F01N3/10

CPC分类号： F01N3/10 ,  F01N3/035 ,  F01N3/2066 ,  F01N11/00 ,  F01N13/009 ,  F01N2430/00 ,  F01N2550/00 ,  F01N2550/04 ,  F01N2560/05 ,  F01N2900/0422 ,  F01N2900/08 ,  F01N2900/1606 ,  F02D41/0255 ,  F02D41/1495 ,  F02D41/22 ,  Y02T10/26 ,  Y02T10/47

摘要： An object of the invention is to prevent a situation in which failure diagnosis for an exhaust system component in an internal combustion engine cannot be completed from continuing for an unduly long period of time. A warm-up system for an exhaust system of an internal combustion engine according to the invention includes a warm-up control performing unit that performs warm-up control for warming up an exhaust system component upon start-up of the internal combustion engine and a failure diagnosis performing unit that performs failure diagnosis for the exhaust system component after the completion of warm-up of the exhaust system component. If a situation in which the operation of the internal combustion engine is stopped after the start of operation of the internal combustion engine before the completion of the failure diagnosis for the exhaust system component performed by the failure diagnosis performing unit has been repeated for a predetermined period of time, the warm-up control performing unit changes the warm-up control performed upon start-up of the internal combustion engine after the predetermined period of time has elapsed to a control that can raise the temperature of the exhaust system component more quickly than the warm-up control performed during the aforementioned predetermined period.

摘要翻译： 本发明的目的是防止内燃机中的排气系统部件的故障诊断不能够持续不长时间的情况。 根据本发明的用于内燃机的排气系统的预热系统包括预热控制执行单元，其在内燃机启动时进行预热排气系统部件的预热控制，以及 故障诊断执行单元，其在排气系统部件的预热完成之后对排气系统部件执行故障诊断。 如果在由故障诊断执行单元执行的用于排气系统部件的故障诊断完成之后内燃机的运行停止之后的状态已经重复了预定时间段 的时间，预热控制执行单元改变在经过预定时间段之后内燃机启动时执行的预热控制，使其能够比排气系统组件的温度更快地升高 在上述预定期间内进行预热控制。

公开(公告)号：US20130192208A1

公开(公告)日：2013-08-01

申请号：US13125746

申请日：2010-10-22

申请人： Daisuke Shibata ,  Hiroshi Sawada ,  Toru Kidokoro ,  Taiga Hagimoto ,  Kazuya Takaoka

发明人： Daisuke Shibata ,  Hiroshi Sawada ,  Toru Kidokoro ,  Taiga Hagimoto ,  Kazuya Takaoka

IPC分类号： F01N3/021

CPC分类号： F01N3/021 ,  F01N11/00 ,  F01N2550/04 ,  F01N2560/05 ,  F01N2900/0412 ,  F01N2900/0416 ,  F01N2900/0418 ,  F01N2900/0601 ,  F01N2900/08 ,  F01N2900/1411 ,  Y02T10/20 ,  Y02T10/47

摘要： A failure of a filter is detected with a higher degree of accuracy. There are provided a filter that is arranged on an exhaust passage of an internal combustion engine for collecting a substance contained in an exhaust gas, a substance amount detection part that is arranged on the exhaust passage at a downstream side of the filter for detecting an amount of substance in the exhaust gas, a flow speed detection part that detects or estimates a flow speed of the exhaust gas which passes through the filter, and a determination part that makes a determination that the filter is in a failure, when the higher the flow speed of the exhaust gas passing through the filter, the larger a ratio of an amount of change in the amount of substance to an amount of change in the flow speed of the exhaust gas becomes.

摘要翻译： 以更高的准确度检测滤波器的故障。 本发明提供一种过滤器，其设置在内燃机的排气通路上，用于收集废气中所含的物质，物质量检测部，其布置在过滤器的下游侧的排气通道上，用于检测废气量 废气中的物质的流量检测部，检测或估计通过过滤器的排气的流速的流量检测部以及判定为过滤器处于故障的判定部，流量越高 通过过滤器的废气的速度，物质量的变化量与排气的流速变化量的比例越大。