-
1.发明授权Offset and slow response diagnostic methods for NOx sensors in vehicle exhaust treatment applications 有权车辆尾气处理应用中NOx传感器的偏移和慢响应诊断方法公开(公告)号：US08930121B2
公开(公告)日：2015-01-06
申请号：US13081801
申请日：2011-04-07
CPC分类号： F02D41/222 , F01N3/0814 , F01N3/2066 , F01N2560/026 , F01N2560/06 , F02D41/123 , F02D41/1463 , F02D2041/228 , F02D2200/0614 , Y02A50/2325
摘要： A method that includes in-vehicle systems and practices for determining whether a NOx sensor in an exhaust stream is performing properly.
摘要翻译： 一种包括用于确定排气流中的NOx传感器是否正常执行的车载系统和实践的方法。
-
公开(公告)号：US08694197B2
公开(公告)日：2014-04-08
申请号：US13116055
申请日：2011-05-26
IPC分类号： F01N11/00
CPC分类号： F02D41/146 , F02D41/222 , Y02T10/40
摘要： A method of diagnosing vehicle NOx sensor faults that includes sensing that an exhaust gas recirculating (EGR) valve is closed and that fuel flow to a vehicle engine is above a predetermined rate using an electronic control unit (ECU) located on a vehicle; recording the output received from an NOx sensor relative to an amount of fuel consumption over a period of time using the ECU; calculating the mean of the NOx sensor output relative to fuel consumption recorded over the period of time using the ECU; performing a least-squares estimation (LSE) using the ECU for more than one calculated mean based on an expected NOx sensor output; generating a NOx sensor gain for the NOx sensor using the ECU based on the LSE; and determining whether the NOx sensor gain is above or below a predetermined threshold.
摘要翻译： 一种诊断车辆NOx传感器故障的方法，其包括使用位于车辆上的电子控制单元（ECU）感测废气再循环（EGR）阀关闭并且到车辆发动机的燃料流量高于预定速率; 使用ECU记录从NOx传感器接收的输出相对于一段时间内的燃料消耗量; 使用ECU计算相对于在一段时间内记录的燃料消耗的NOx传感器输出的平均值; 基于预期的NOx传感器输出，使用ECU对多于一个计算平均值执行最小二乘估计（LSE）; 使用基于LSE的ECU为NOx传感器生成NOx传感器增益; 以及确定NOx传感器增益是否高于或低于预定阈值。
-
3.发明申请METHOD AND APPARATUS FOR CONTROLLING A DIAGNOSTIC MODULE FOR AN EXHAUST GAS SENSOR 有权用于控制排气传感器的诊断模块的方法和装置公开(公告)号：US20130317727A1
公开(公告)日：2013-11-28
申请号：US13479747
申请日：2012-05-24
CPC分类号： F02D41/146 , F01N2550/00 , F01N2560/02 , F01N2560/025 , F02D41/123 , F02D41/1456 , F02D41/1495 , F02D2200/101
摘要： A method and apparatus for controlling a diagnostic module for an exhaust gas sensor in a vehicle is provided. The exhaust gas sensor is located in an exhaust pathway in the vehicle. The diagnostic module may be configured to perform a signal range verification of an oxygen sensor portion of the exhaust gas sensor. A controller is operatively connected to the exhaust gas sensor and to the vehicle engine. The controller disables the diagnostic module when one or more entry conditions are satisfied. The entry conditions may include requiring the engine speed to be greater than a fuel cut-off threshold, the fuel cut-off threshold being the engine speed at which the fuel to the engine is terminated. The entry conditions may include: no fuel being delivered to the engine; and a vehicle exhaust brake mode being activated such that the exhaust pathway from the engine is obstructed.
摘要翻译： 提供了一种用于控制车辆中的废气传感器的诊断模块的方法和装置。 废气传感器位于车辆的排气路径中。 诊断模块可以被配置为执行废气传感器的氧传感器部分的信号范围验证。 控制器可操作地连接到废气传感器和车辆发动机。 当满足一个或多个输入条件时，控制器禁用诊断模块。 进入条件可以包括要求发动机转速大于燃料截止阈值，燃料切断阈值是终止燃油的发动机转速。 进入条件可能包括：没有燃料被输送到发动机; 并且车辆排气制动模式被激活，使得来自发动机的排气通道被阻挡。
-
公开(公告)号：US20120117942A1
公开(公告)日：2012-05-17
申请号：US13012897
申请日：2011-01-25
CPC分类号： F02D41/222 , F01N3/2066 , F01N2560/026 , F02D41/123 , F02D41/146 , Y02A50/2325 , Y02T10/40
摘要： A vehicle includes an engine having an exhaust port, an exhaust system for conditioning an engine exhaust stream, a nitrogen oxide (NOx) sensor positioned within the exhaust stream, and a controller. The controller has an out-of-range diagnostic tool for evaluating a range performance of the sensor. The controller detects a predetermined engine-on fuel shutoff event, and then temporarily disables the diagnostic tool during the fuel shutoff event. The fuel shutoff event may be a vehicle deceleration-based event. A selective catalytic reduction (SCR) device may be positioned within the exhaust system, with at least one NOx sensor positioned at the outlet of the SCR device. An additional NOx sensor may be positioned in proximity to the exhaust port. A method for use aboard the above vehicle includes detecting the engine-on fuel shutoff event via the controller, and temporarily disabling the diagnostic tool for the duration of the detected fuel shutoff event.
摘要翻译： 车辆包括具有排气口的发动机，用于调节发动机排气流的排气系统，位于排气流内的氮氧化物（NOx）传感器以及控制器。 控制器具有超出范围的诊断工具，用于评估传感器的范围性能。 控制器检测预定的发动机燃料切断事件，然后在燃料切断事件期间临时禁用诊断工具。 燃料关闭事件可以是基于车辆减速的事件。 选择性催化还原（SCR）装置可以位于排气系统内，其中至少一个NOx传感器位于SCR装置的出口处。 附加的NOx传感器可以位于排气口附近。 在上述车辆上使用的方法包括经由控制器检测发动机燃料切断事件，并且在检测到的燃料切断事件期间临时禁用诊断工具。
-
5.发明申请Method for determination of Covariance of Indicated Mean Effective Pressure from crankshaft misfire acceleration 审中-公开确定曲轴失火加速度指示平均有效压力协方差的方法公开(公告)号：US20090093951A1
公开(公告)日：2009-04-09
申请号：US11973099
申请日：2007-10-05
IPC分类号： G01M15/11
CPC分类号： G01M15/11
摘要： A method for determining Covariance of Indicated Mean Effective Pressure (COVIMEP) using already-available crankshaft-based measurements that correlate with COVIMEP. Correlated values of COVIMEP are stored as lookup tables in an Engine Control Module for use in continuously determining COVIMEP during engine operation. COVIMEP thus calculated may be used in known fashion as a real time control algorithm variable for such engine control parameters as fueling rate, spark angle advance, exhaust gas recirculation flow, and camshaft phaser advance angle or other engine parameters.
摘要翻译： 使用与COVIMEP相关的已经可用的基于曲轴的测量来确定指示平均有效压力（COVIMEP）的协方差的方法。 COVIMEP的相关值作为查找表存储在发动机控制模块中，用于在发动机运行期间连续确定COVIMEP。 这样计算的COVIMEP可以以已知方式用作这样的发动机控制参数的实时控制算法变量，例如加油速率，火花角前进，废气再循环流和凸轮轴相位器提前角或其他发动机参数。
-
公开(公告)号：US20130047702A1
公开(公告)日：2013-02-28
申请号：US13222025
申请日：2011-08-31
IPC分类号： G01M15/10
CPC分类号： F01N3/10 , F01N11/00 , F01N2560/026 , F01N2560/028 , F02D41/146 , F02D41/222 , F02D2200/70 , G01N33/007 , Y02T10/40 , Y02T10/47
摘要： A method of monitoring a sensor of an exhaust system is provided. The method includes evaluating humidity of air entering the exhaust system; and monitoring operation of a sensor in the exhaust system based on the humidity.
摘要翻译： 提供了一种监测排气系统的传感器的方法。 该方法包括评估进入排气系统的空气的湿度; 以及基于湿度监测排气系统中的传感器的运行。
-
公开(公告)号：US09121323B2
公开(公告)日：2015-09-01
申请号：US13087429
申请日：2011-04-15
CPC分类号： F01N3/2066 , F01N3/021 , F01N3/103 , F01N11/00 , F01N2560/026 , F01N2610/148 , Y02A50/2325 , Y02T10/24 , Y02T10/47
摘要： A vehicle includes an engine, an exhaust system, an SCR device, upstream and downstream NOx sensors, and a controller. The controller is in electrical communication with the NOx sensors, and is configured for detecting a stuck-in-range fault condition of the downstream NOx sensor during a low exhaust flow condition. The controller detects the condition, receives the upstream and downstream NOx levels from the respective upstream and downstream NOx sensors, and compares these levels to a zero or near-zero threshold when the low exhaust flow condition is active. The controller is also configured for executing a first control action when the upstream NOx level is below the threshold and the downstream NOx level exceeds the threshold, and executing a second control action when neither of the levels exceeds the threshold. A method is also disclosed for diagnosing the stuck-in-range condition.
摘要翻译： 车辆包括发动机，排气系统，SCR装置，上游和下游NOx传感器以及控制器。 控制器与NOx传感器电连通，并且被配置为在低排气流条件期间检测下游NOx传感器的滞留故障状态。 控制器检测该状况，从各上游和下游的NOx传感器接收上游和下游的NOx水平，并且当低排气流条件有效时将这些水平与零或接近零的阈值进行比较。 控制器还被配置为当上游NOx水平低于阈值并且下游NOx水平超过阈值时执行第一控制动作，并且当两个水平都不超过阈值时执行第二控制动作。 还公开了一种用于诊断卡住范围条件的方法。
-
公开(公告)号：US08707677B2
公开(公告)日：2014-04-29
申请号：US13012897
申请日：2011-01-25
IPC分类号： F01N11/00
CPC分类号： F02D41/222 , F01N3/2066 , F01N2560/026 , F02D41/123 , F02D41/146 , Y02A50/2325 , Y02T10/40
摘要： A vehicle includes an engine having an exhaust port, an exhaust system for conditioning an engine exhaust stream, a nitrogen oxide (NOx) sensor positioned within the exhaust stream, and a controller. The controller has an out-of-range diagnostic tool for evaluating a range performance of the sensor. The controller detects a predetermined engine-on fuel shutoff event, and then temporarily disables the diagnostic tool during the fuel shutoff event. The fuel shutoff event may be a vehicle deceleration-based event. A selective catalytic reduction (SCR) device may be positioned within the exhaust system, with at least one NOx sensor positioned at the outlet of the SCR device. An additional NOx sensor may be positioned in proximity to the exhaust port. A method for use aboard the above vehicle includes detecting the engine-on fuel shutoff event via the controller, and temporarily disabling the diagnostic tool for the duration of the detected fuel shutoff event.
摘要翻译： 车辆包括具有排气口的发动机，用于调节发动机排气流的排气系统，位于排气流内的氮氧化物（NOx）传感器以及控制器。 控制器具有超出范围的诊断工具，用于评估传感器的范围性能。 控制器检测预定的发动机燃料切断事件，然后在燃料切断事件期间临时禁用诊断工具。 燃料关闭事件可以是基于车辆减速的事件。 选择性催化还原（SCR）装置可以位于排气系统内，其中至少一个NOx传感器位于SCR装置的出口处。 附加的NOx传感器可以位于排气口附近。 在上述车辆上使用的方法包括经由控制器检测发动机燃料切断事件，并且在检测到的燃料切断事件期间临时禁用诊断工具。
-
公开(公告)号：US08683844B2
公开(公告)日：2014-04-01
申请号：US13222025
申请日：2011-08-31
CPC分类号： F01N3/10 , F01N11/00 , F01N2560/026 , F01N2560/028 , F02D41/146 , F02D41/222 , F02D2200/70 , G01N33/007 , Y02T10/40 , Y02T10/47
摘要： A method of monitoring a sensor of an exhaust system is provided. The method includes evaluating humidity of air entering the exhaust system; and monitoring operation of a sensor in the exhaust system based on the humidity.
摘要翻译： 提供了一种监测排气系统的传感器的方法。 该方法包括评估进入排气系统的空气的湿度; 以及基于湿度监测排气系统中的传感器的运行。
-
公开(公告)号：US20120260625A1
公开(公告)日：2012-10-18
申请号：US13087429
申请日：2011-04-15
CPC分类号： F01N3/2066 , F01N3/021 , F01N3/103 , F01N11/00 , F01N2560/026 , F01N2610/148 , Y02A50/2325 , Y02T10/24 , Y02T10/47
摘要： A vehicle includes an engine, an exhaust system, an SCR device, upstream and downstream NOx sensors, and a controller. The controller is in electrical communication with the NOx sensors, and is configured for detecting a stuck-in-range fault condition of the downstream NOx sensor during a low exhaust flow condition. The controller detects the condition, receives the upstream and downstream NOx levels from the respective upstream and downstream NOx sensors, and compares these levels to a zero or near-zero threshold when the low exhaust flow condition is active. The controller is also configured for executing a first control action when the upstream NOx level is below the threshold and the downstream NOx level exceeds the threshold, and executing a second control action when neither of the levels exceeds the threshold. A method is also disclosed for diagnosing the stuck-in-range condition.
摘要翻译： 车辆包括发动机，排气系统，SCR装置，上游和下游NOx传感器以及控制器。 控制器与NOx传感器电连通，并且被配置为在低排气流条件期间检测下游NOx传感器的滞留故障状态。 控制器检测状况，从各上游和下游的NOx传感器接收上游和下游的NOx水平，并且当低排气流条件有效时将这些水平与零或接近零的阈值进行比较。 控制器还被配置为当上游NOx水平低于阈值并且下游NOx水平超过阈值时执行第一控制动作，并且当两个水平都不超过阈值时执行第二控制动作。 还公开了一种用于诊断卡住范围条件的方法。
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.015 秒)
