公开(公告)号：EP2573371B1

公开(公告)日：2020-02-26

申请号：EP11783508.2

申请日：2011-05-16

Applicant: Isuzu Motors, Ltd.

Inventor： TAKAHASHI, Hirotaka ,  MIZUTANI, Masashi ,  OGAWA, Takanobu

IPC: F02D41/22 ,  F02D41/14 ,  F01N11/00 ,  F01N3/20 ,  F02D45/00 ,  F01N3/08

公开(公告)号：EP2573343B1

公开(公告)日：2017-12-20

申请号：EP11783503.3

申请日：2011-05-16

Applicant: Isuzu Motors, Ltd.

Inventor： TAKAHASHI, Hirotaka ,  HAMAGUCHI, Yoshinori ,  OGAWA, Takanobu

IPC: F01N3/08 ,  F02D45/00 ,  F01N11/00 ,  F01N3/20 ,  F02D41/06 ,  F02D41/22

CPC classification number: F01N3/2066 ,  F01N11/002 ,  F01N2550/05 ,  F01N2560/06 ,  F01N2610/02 ,  F01N2610/1406 ,  F01N2900/08 ,  F01N2900/12 ,  F01N2900/1811 ,  F02D41/064 ,  F02D41/222 ,  Y02T10/24 ,  Y02T10/47

Abstract: Provided is a competence diagnosis system for a urea water temperature sensor that can limit a diagnosis during a cold start. A competence diagnosis system for a urea water temperature sensor 129 includes a competence diagnosis unit 127 that diagnoses a failure of a temperature sensor 121 provided in a urea tank 105 by comparing a temperature of urea water measured by the temperature sensor 121 with an ambient temperature. The competence diagnosis system for a urea water temperature sensor 129 includes a cold start condition determination unit 128 that obtains a difference between an engine cooling water temperature and an ambient temperature, a difference between an engine cooling water temperature and a fuel temperature, and a difference between an ambient temperature and a fuel temperature by using an engine cooling water temperature, an ambient temperature, and a fuel temperature measured immediately after engine starting, and allows a diagnosis by the competence diagnosis unit 127 when the temperature differences are less than or equal to a predetermined threshold value.

公开(公告)号：EP2573344B1

公开(公告)日：2017-11-22

申请号：EP11783504.1

申请日：2011-05-16

Applicant: Isuzu Motors, Ltd.

Inventor： TAKAHASHI, Hirotaka ,  HAMAGUCHI, Yoshinori ,  MIZUTANI, Masashi

IPC: F01N11/00 ,  F01N3/08 ,  F01N3/00 ,  F01N3/20

CPC classification number: F01N11/00 ,  F01N3/2066 ,  F01N2550/05 ,  F01N2560/06 ,  F01N2900/0416 ,  F01N2900/08 ,  F01N2900/12 ,  F01N2900/1811 ,  F01N2900/1814 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

Abstract: Provided is a competence diagnosis system for a urea water temperature sensor that can prevent a misdiagnosis when urea water is replenished in a urea tank. A competence diagnosis system for a urea water temperature sensor 129 includes a competence diagnosis unit 127 that diagnoses a failure of a temperature sensor 121 provided in a urea tank 105 by comparing a urea water temperature measured by the temperature sensor 121 with an ambient temperature. The competence diagnosis system for a urea water temperature sensor 129 includes a urea water level condition determination unit 128 that stores a urea water level, which is measured by a level sensor 120 provided in the urea tank 105, in a storage unit 130 immediately before key-off, obtains a level difference between the urea water level stored in the storage unit 130 and a current urea water level after key-on, and allows a diagnosis by the competence diagnosis unit 127 through temperature comparison when the level difference is less than or equal to a predetermined threshold value.

公开(公告)号：EP2942501B1

公开(公告)日：2018-02-07

申请号：EP13868121.8

申请日：2013-12-17

Applicant: Isuzu Motors, Ltd.

Inventor： NIHONGI, Shigeru ,  TAKAHASHI, Hirotaka ,  MINEZAWA, Masanobu ,  SUZUKI, Yutaka ,  TAKAHASHI, Kouichi ,  FUKUOKA, Takeshi

IPC: F01N3/08 ,  F01N3/20

CPC classification number: F01N3/208 ,  F01N2550/05 ,  F01N2560/026 ,  F01N2610/148 ,  F01N2900/1814 ,  F01N2900/1818 ,  Y02A50/2325 ,  Y02T10/24

Abstract: Provided is a urea water consumption diagnostic device for urea SCR, capable of detecting if a pressurized fluid feed line or a dosing valve has been clogged or stuck with a foreign matter, or if the urea water has been left to continue spraying from the dosing valve. The urea water consumption diagnostic device for urea SCR includes a urea water sensor (22) that detects a level of the urea water (U) in a urea water tank (15), spray volume instruction means (30) that instructs a volume of urea water to be sprayed from the dosing valve (12) in accordance with NOx in an exhaust gas, instructed spray volume addition means (31) that adds up the instructed spray volumes instructed by the spray volume instruction means (30), consumption volume calculation means (32) that calculates a cumulative consumption volume (D) from a detection value input from the urea water sensor (22), and abnormality diagnostic means (33) that compares a cumulative instructed spray volume (P) from the instructed spray volume addition means (31) to the cumulative consumption volume (D) from the consumption volume calculation means (32) and determines whether the urea water spraying by the dosing valve (12) is normal or abnormal.

公开(公告)号：EP2578860B1

公开(公告)日：2019-07-24

申请号：EP11786510.5

申请日：2011-05-16

Applicant: Isuzu Motors, Ltd.

Inventor： FUKUOKA, Takeshi ,  TAKAHASHI, Hirotaka ,  NISHIKAWA, Tomoo

IPC: F01N3/08 ,  F02D45/00 ,  G01F23/30 ,  G01F23/70 ,  G01F25/00 ,  G01F23/00 ,  F01N3/20 ,  F01N3/18

公开(公告)号：EP3263875A1

公开(公告)日：2018-01-03

申请号：EP16755562.2

申请日：2016-02-24

Applicant: Isuzu Motors, Ltd.

Inventor： HASEGAWA, Ken ,  TAKAHASHI, Hirotaka ,  MINEZAWA, Masanobu

IPC: F02D45/00 ,  F01N3/00 ,  F01N3/18 ,  F01N3/24 ,  G01N27/26 ,  G01N27/416

CPC classification number: F02D41/222 ,  F01N3/2066 ,  F01N11/00 ,  F01N13/008 ,  F01N2240/36 ,  F01N2560/026 ,  F01N2610/02 ,  F01N2900/1402 ,  F01N2900/1411 ,  F02D9/04 ,  F02D13/04 ,  F02D41/123 ,  F02D41/1445 ,  F02D41/1461 ,  F02D41/1463 ,  F02D41/2441 ,  F02D41/2448 ,  F02D41/2474 ,  F02D41/3005 ,  F02D2200/602 ,  G01M15/102 ,  G01N33/0037 ,  Y02A50/245

Abstract: A diagnostic device for a sensor 100 provided in an exhaust passage 11 of an internal combustion engine 10 of a vehicle and detecting nitrogen compounds in exhaust gas, the diagnostic device including an offset diagnosis unit 42 which diagnoses, during deceleration of the vehicle in which the internal combustion engine 10 stops fuel injection, an offset amount of a sensor value of the sensor 100 from a zero point based on the sensor value of the sensor value, and a diagnosis prohibition unit 44 which prohibits the diagnosing of the offset amount when a flow rate of the exhaust gas of the internal combustion engine 10 rapidly increases while the offset amount is diagnosed by the offset diagnosis unit 42.

Abstract translation: 在车辆的内燃机10的排气通路11中设置并检测排气中的氮化合物的传感器100的诊断装置具有偏移诊断部42，该偏移诊断部42在车辆的减速时 内燃机10基于传感器值的传感器值停止燃料喷射，传感器100的传感器值从零点开始的偏移量，以及诊断禁止单元44，其禁止诊断流量时的偏移量 在由偏移诊断单元42诊断偏移量的同时内燃机10的排气的速度迅速增大。

公开(公告)号：EP2573371A1

公开(公告)日：2013-03-27

申请号：EP11783508.2

申请日：2011-05-16

Applicant: Isuzu Motors, Ltd.

Inventor： TAKAHASHI, Hirotaka ,  MIZUTANI, Masashi ,  OGAWA, Takanobu

IPC: F02D45/00 ,  F01N3/08

CPC classification number: F02D41/222 ,  F01N3/208 ,  F01N11/00 ,  F01N2560/026 ,  F01N2610/02 ,  F01N2900/14 ,  F02D41/146 ,  F02D2041/228 ,  F02D2200/021 ,  F02D2200/0414 ,  F02D2200/703 ,  Y02T10/24 ,  Y02T10/40 ,  Y02T10/47

Abstract: Provided are a NOx sensor diagnosis apparatus capable of diagnosing the appropriateness of a NOx sensor by considering environmental conditions and preventing misdiagnosis, and an SCR system.
A NOx sensor diagnose apparatus, which diagnoses a NOx sensor 110 provided in an exhaust pipe 102 of an engine E and configured to detect the concentration of NOx in exhaust gas, includes a calculation value operating unit 2 configured to acquire the calculation value of the concentration of NOx in the exhaust gas based on the actuation state of the engine E, an error determining unit 3 configured to determine that the NOx sensor 110 is erroneous when a difference between the calculation value of the concentration of NOx acquired by the calculation value operating unit 2 and the detection value of the concentration of NOx detected by the NOx sensor 110 is larger than a determination threshold value, and a determination threshold value setting unit 4 configured to set the determination threshold value based on the temperature of the cooling water for cooling the engine E, an atmospheric pressure, and an outdoor temperature.

Abstract translation: 提供了能够通过考虑环境条件和防止误诊来诊断NOx传感器的适当性的NOx传感器诊断装置以及SCR系统。 一种NOx传感器诊断装置，其对设置在发动机E的排气管102中并且构成为检测排气中的NOx浓度的NOx传感器110进行诊断，所述NOx传感器诊断装置具备计算值运算部2， 基于发动机E的动作状态的排气中的NOx的误差判定单元3，被配置为当计算值运算单元获取的NOx浓度的计算值之差 2，并且由NOx传感器110检测出的NOx浓度的检测值大于判定阈值，判定阈值设定部4基于用于冷却的冷却水的温度来设定判定阈值 发动机E，大气压力和室外温度。

公开(公告)号：EP2573344A1

公开(公告)日：2013-03-27

申请号：EP11783504.1

申请日：2011-05-16

Applicant: Isuzu Motors, Ltd.

Inventor： TAKAHASHI, Hirotaka ,  HAMAGUCHI, Yoshinori ,  MIZUTANI, Masashi

IPC: F01N3/08 ,  F01N3/00 ,  F01N3/20

CPC classification number: F01N11/00 ,  F01N3/2066 ,  F01N2550/05 ,  F01N2560/06 ,  F01N2900/0416 ,  F01N2900/08 ,  F01N2900/12 ,  F01N2900/1811 ,  F01N2900/1814 ,  Y02A50/2325 ,  Y02T10/24 ,  Y02T10/47

Abstract: Provided is a competence diagnosis system for a urea water temperature sensor that can prevent a misdiagnosis when urea water is replenished in a urea tank. A competence diagnosis system for a urea water temperature sensor 129 includes a competence diagnosis unit 127 that diagnoses a failure of a temperature sensor 121 provided in a urea tank 105 by comparing a urea water temperature measured by the temperature sensor 121 with an ambient temperature. The competence diagnosis system for a urea water temperature sensor 129 includes a urea water level condition determination unit 128 that stores a urea water level, which is measured by a level sensor 120 provided in the urea tank 105, in a storage unit 130 immediately before key-off, obtains a level difference between the urea water level stored in the storage unit 130 and a current urea water level after key-on, and allows a diagnosis by the competence diagnosis unit 127 through temperature comparison when the level difference is less than or equal to a predetermined threshold value.

公开(公告)号：EP2573343A1

公开(公告)日：2013-03-27

申请号：EP11783503.3

申请日：2011-05-16

Applicant: Isuzu Motors, Ltd.

Inventor： TAKAHASHI, Hirotaka ,  HAMAGUCHI, Yoshinori ,  OGAWA, Takanobu

IPC: F01N3/08 ,  F02D45/00

CPC classification number: F01N3/2066 ,  F01N11/002 ,  F01N2550/05 ,  F01N2560/06 ,  F01N2610/02 ,  F01N2610/1406 ,  F01N2900/08 ,  F01N2900/12 ,  F01N2900/1811 ,  F02D41/064 ,  F02D41/222 ,  Y02T10/24 ,  Y02T10/47

Abstract: Provided is a competence diagnosis system for a urea water temperature sensor that can limit a diagnosis during a cold start. A competence diagnosis system for a urea water temperature sensor 129 includes a competence diagnosis unit 127 that diagnoses a failure of a temperature sensor 121 provided in a urea tank 105 by comparing a temperature of urea water measured by the temperature sensor 121 with an ambient temperature. The competence diagnosis system for a urea water temperature sensor 129 includes a cold start condition determination unit 128 that obtains a difference between an engine cooling water temperature and an ambient temperature, a difference between an engine cooling water temperature and a fuel temperature, and a difference between an ambient temperature and a fuel temperature by using an engine cooling water temperature, an ambient temperature, and a fuel temperature measured immediately after engine starting, and allows a diagnosis by the competence diagnosis unit 127 when the temperature differences are less than or equal to a predetermined threshold value.

Abstract translation: 提供了一种能够限制冷启动时诊断的尿素水温度传感器的能力诊断系统。 用于尿素水温度传感器129的能力诊断系统包括能力诊断单元127，其通过将由温度传感器121测量的尿素水的温度与环境温度进行比较来诊断设置在尿素箱105中的温度传感器121的故障。 尿素水温传感器129的能力诊断系统包括：冷启动条件判定部128，其求出发动机冷却水温度与环境温度之差，发动机冷却水温度与燃料温度之差， 通过使用发动机冷却水温度，环境温度和发动机起动后立即测量的燃料温度在环境温度和燃料温度之间，并且当温度差小于或等于1时由能力诊断单元127进行诊断 预定阈值。