公开(公告)号：US07369937B1

公开(公告)日：2008-05-06

申请号：US11821590

申请日：2007-06-22

申请人： Wenbo Wang ,  Kurt D. McLain ,  Zhong Wang

发明人： Wenbo Wang ,  Kurt D. McLain ,  Zhong Wang

IPC分类号： F02D45/00 ,  G06F19/00

CPC分类号： F02D41/222 ,  F02D41/18 ,  F02D2200/0402 ,  F02D2200/0414 ,  Y02T10/40

摘要： A method of determining whether a fault condition of an intake air temperature (IAT) sensor of an engine is present includes estimating a first intake charge temperature (ICT) based on an estimated first ICT and a previously estimated first mass air flow (MAF) and estimating a second ICT based on a previously estimated second ICT and a currently measured MAF. An IAT difference is determined based on the first ICT and the second ICT. Whether the fault condition of the IAT sensor is present is determined based on the IAT difference.

摘要翻译： 确定发动机的进气温度（IAT）传感器的故障状况是否存在的方法包括基于估计的第一ICT和先前估计的第一质量空气流（MAF）来估计第一进气充量温度（ICT）和 基于先前估计的第二ICT和当前测量的MAF估计第二ICT。 IAT的差异是基于第一个ICT和第二个ICT确定的。 基于IAT差异确定​​IAT传感器的故障状态是否存在。

公开(公告)号：US20090187301A1

公开(公告)日：2009-07-23

申请号：US12015750

申请日：2008-01-17

申请人： Wenbo Wang ,  Kurt D. McLain ,  Zhong Wang

发明人： Wenbo Wang ,  Kurt D. McLain ,  Zhong Wang

IPC分类号： F02D41/00 ,  F02D35/02

CPC分类号： F02D41/18 ,  F02D41/0002 ,  F02D41/22 ,  F02D2200/0402

摘要： A method of determining an engine intake air leak may include measuring an air flow rate into an internal combustion engine, comparing the measured air flow rate to a first predetermined air flow limit, calculating an estimated air flow rate into the engine when the measured air flow rate is less than the first predetermined air flow limit, comparing the estimated air flow rate to second and third predetermined air flow limits, and indicating an air leak when the estimated air flow rate is greater than the second predetermined air flow limit and less than the third predetermined air flow limit.

摘要翻译： 确定发动机进气泄漏的方法可以包括测量进入内燃机的空气流量，将测量的空气流量与第一预定空气流量限制进行比较，计算当测量的空气流量时进入发动​​机的估计空气流量 速率小于第一预定空气流量限制，将估计的空气流量与第二和第三预定空气流量限制进行比较，并且当估计空气流量大于第二预定空气流量限制时指示空气泄漏，并且小于 第三预定气流限制。

公开(公告)号：US08181507B2

公开(公告)日：2012-05-22

申请号：US12132192

申请日：2008-06-03

申请人： Kurt D. McLain ,  Wenbo Wang ,  Zhong Wang ,  William R. Cadman

发明人： Kurt D. McLain ,  Wenbo Wang ,  Zhong Wang ,  William R. Cadman

IPC分类号： G01M3/00

CPC分类号： F02M25/0827

摘要： A control system comprising a wind condition determination module that determines a wind condition and a leak detection test control module that selectively diagnoses a vapor leak associated with a vehicle based on the wind condition. A method comprising determining a wind condition and selectively diagnosing a vapor leak associated with a vehicle based on the wind condition.

摘要翻译： 一种控制系统，包括确定风况的风况确定模块和基于风况选择性地诊断与车辆相关联的蒸气泄漏的泄漏检测测试控制模块。 一种方法，包括基于风况确定风况并选择性地诊断与车辆相关联的蒸气泄漏。

公开(公告)号：US07805984B2

公开(公告)日：2010-10-05

申请号：US11467032

申请日：2006-08-24

申请人： Kurt D. McLain ,  Wenbo Wang

发明人： Kurt D. McLain ,  Wenbo Wang

IPC分类号： G01M15/04

CPC分类号： F02D41/221 ,  F02D2200/0406 ,  Y02T10/40

摘要： A method of diagnosing a malfunction of a tuning valve of an intake manifold coupled to an internal combustion engine is provided. The method includes: commanding the tuning valve to at least one of a closed and an opened position; computing an average deviation of manifold absolute pressure; determining an average deviation threshold using fuzzy logic based on engine speed and airflow per cylinder; comparing the average deviation to the average deviation threshold; and diagnosing a malfunction of the tuning valve based on a comparison of the average deviation and the average deviation threshold.

摘要翻译： 提供一种诊断与内燃机连接的进气歧管的调节阀故障的方法。 该方法包括：将调谐阀指令为闭合位置和打开位置中的至少一个; 计算歧管绝对压力的平均偏差; 使用基于发动机转速和每气缸气流的模糊逻辑确定平均偏差阈值; 将平均偏差与平均偏差阈值进行比较; 并基于平均偏差和平均偏差阈值的比较来诊断调谐阀的故障。

公开(公告)号：US20100222982A1

公开(公告)日：2010-09-02

申请号：US12394716

申请日：2009-02-27

申请人： Lan Wang ,  Robert J. Genslak ,  Wenbo Wang ,  Matthew Squire ,  Jinchun Peng ,  Edward Stutevilie ,  Kurt D. McLain

发明人： Lan Wang ,  Robert J. Genslak ,  Wenbo Wang ,  Matthew Squire ,  Jinchun Peng ,  Edward Stutevilie ,  Kurt D. McLain

IPC分类号： F02D43/00

CPC分类号： F02D41/0255 ,  F02D41/1447 ,  F02D41/18 ,  F02D2200/0414 ,  F02D2200/0802 ,  Y02T10/26

摘要： A control system for an engine having a catalytic converter includes an energy calculation module that calculates a calculated mass air flow (MAF) of intake air of the engine based on a requested torque and a requested spark timing that correspond to a desired thermal energy of exhaust of the engine, and that determines an expected thermal energy of the exhaust based on the calculated MAF, and an energy residual module that determines a thermal energy residual of the exhaust based on the expected thermal energy and an estimated thermal energy of the exhaust, wherein the estimated thermal energy is based on a measured MAF of the intake air. The control system includes an energy evaluation module that determines a diagnostic result that indicates whether the catalytic converter is operating within a target temperature range based on the thermal energy residual. Related control methods are also provided.

摘要翻译： 一种用于具有催化转化器的发动机的控制系统，包括能量计算模块，该能量计算模块基于所要求的扭矩和与期望的排气热能相对应的所要求的火花正时来计算发动机的进气的计算质量空气流量（MAF） 并且基于所计算的MAF确定排气的预期热能;以及能量残余模块，其基于预期的热能和所估计的排气的热能来确定排气的热能残余，其中 估计的热能基于进气的测量MAF。 控制系统包括能量评估模块，该能量评估模块基于热能残差确定指示催化转化器是否在目标温度范围内运行的诊断结果。 还提供了相关的控制方法。

公开(公告)号：US07305298B2

公开(公告)日：2007-12-04

申请号：US11402733

申请日：2006-04-12

申请人： Kurt D. McLain ,  Wenbo Wang

发明人： Kurt D. McLain ,  Wenbo Wang

IPC分类号： F02D13/00 ,  B60T7/12

CPC分类号： F02B31/06 ,  F02D41/1404 ,  F02D41/187 ,  F02D41/221 ,  F02D2041/0015 ,  F02D2200/0402 ,  F02D2200/0404 ,  F02D2200/0414 ,  Y02T10/146 ,  Y02T10/40

摘要： A method of diagnosing a malfunction of a charge motion control valve coupled to an intake manifold of an internal combustion engine is provided. The method includes: commanding the valve to at least one of close and open; determining a pressure range using fuzzy logic based on a mass of air flowing into the intake manifold and a temperature of the air flowing into the intake manifold; determining a change in absolute pressure of the intake manifold; comparing the change in absolute pressure to the pressure range; and diagnosing a malfunction of the valve when the change in absolute pressure is within the pressure range.

摘要翻译： 提供一种诊断与内燃机的进气歧管相连的充气运动控制阀故障的方法。 该方法包括：将阀门指向关闭和打开中的至少一个; 使用基于流入所述进气歧管的空气质量和流入所述进气歧管的空气的温度来确定压力范围; 确定进气歧管的绝对压力的变化; 比较绝对压力与压力范围的变化; 并且当绝对压力的变化在压力范围内时诊断阀的故障。

公开(公告)号：US07228852B1

公开(公告)日：2007-06-12

申请号：US11289946

申请日：2005-11-30

申请人： Wenbo Wang ,  Kurt D. McLain

发明人： Wenbo Wang ,  Kurt D. McLain

IPC分类号： F02M25/07 ,  F02B47/08 ,  G01M15/00

CPC分类号： F02D41/0055 ,  F02D41/0072 ,  F02D41/187 ,  F02D2200/0406 ,  F02D2200/0414 ,  F02M26/49 ,  Y02T10/47

摘要： An engine control system that monitors flow restriction through an exhaust gas recirculation (EGR) system of an engine includes a first module that calculates a test EGR mass flow rate based on a first average EGR mass flow rate when the EGR system is in an EGR OFF mode and a second average EGR mass flow rate when the EGR system is in an EGR ON mode. A second module selectively generates a fault signal based on the test EGR mass flow rate.

摘要翻译： 通过发动机的废气再循环（EGR）系统监测流量限制的发动机控制系统包括：第一模块，其在EGR系统处于EGR关闭时基于第一平均EGR质量流量计算测试EGR质量流量 模式和EGR系统处于EGR ON模式时的第二平均EGR质量流量。 第二模块基于测试的EGR质量流率选择性地产生故障信号。

公开(公告)号：US08416053B2

公开(公告)日：2013-04-09

申请号：US12436408

申请日：2009-05-06

申请人： Kurt D. McLain ,  Layne K. Wiggins ,  Wenbo Wang

发明人： Kurt D. McLain ,  Layne K. Wiggins ,  Wenbo Wang

IPC分类号： G05B23/02

CPC分类号： G05B9/02 ,  G05B23/0235

摘要： An engine control system comprises a signal deviation module, a variation determination module, and a sensor diagnostic module. The signal deviation module receives a signal from a sensor monitoring an operating condition of an engine and determines a plurality of signal deviations. Each of the plurality of signal deviations is based on a magnitude of a difference between the signal at a first time and the signal at a second time. The second time is different than the first time. The variation determination module generates a variation value based on the plurality of signal deviations during a period. The sensor diagnostic module determines a state of the sensor based on the variation value.

摘要翻译： 发动机控制系统包括信号偏差模块，变化确定模块和传感器诊断模块。 信号偏差模块接收来自传感器的信号，监测发动机的运行状态并确定多个信号偏差。 多个信号偏差中的每一个基于第一时间的信号与第二时间的信号之间的差值的大小。 第二次与第一次不同。 变化确定模块在一段时间内基于多个信号偏差生成变化值。 传感器诊断模块基于变化值来确定传感器的状态。

公开(公告)号：US07886585B2

公开(公告)日：2011-02-15

申请号：US12179682

申请日：2008-07-25

申请人： Kurt D. McLain ,  Wenbo Wang

发明人： Kurt D. McLain ,  Wenbo Wang

IPC分类号： G01M15/04

CPC分类号： F02D41/18 ,  F02D41/222 ,  F02D41/2474 ,  F02D2200/0414

摘要： A diagnostic system for an internal combustion engine includes an intake air temperature (IAT) determination module, a reference temperature determination module, and an adaptive learning module. The IAT determination modules determines a first IAT using an IAT sensor at a first time and determines a second IAT using the IAT sensor at a second time. The reference temperature determination module determines a first frequency based on a first voltage output of a MAF sensor at the first time and determines a second frequency based on a second voltage output of the MAF sensor at the second time. The adaptive learning module determines a temperature-frequency relationship based on the first IAT, the second IAT, the first frequency and the second frequency.

摘要翻译： 一种用于内燃机的诊断系统包括进气温度（IAT）确定模块，参考温度确定模块和自适应学习模块。 IAT确定模块在第一时间使用IAT传感器确定第一IAT，并且在第二时间使用IAT传感器确定第二IAT。 参考温度确定模块基于第一次MAF传感器的第一电压输出确定第一频率，并且在第二时间基于MAF传感器的第二电压输出确定第二频率。 自适应学习模块基于第一IAT，第二IAT，第一频率和第二频率确定温度 - 频率关系。

公开(公告)号：US08234038B2

公开(公告)日：2012-07-31

申请号：US11945608

申请日：2007-11-27

申请人： Kurt D. McLain ,  Wenbo Wang

发明人： Kurt D. McLain ,  Wenbo Wang

IPC分类号： G01M17/00 ,  B63B35/73 ,  F02M23/08

CPC分类号： G01M15/042 ,  F02D41/187 ,  F02D41/222 ,  F02D2200/0414 ,  F02D2200/0416 ,  G01K13/02 ,  G01K15/00 ,  G01K15/007 ,  Y02T10/40

摘要： A method of evaluating intake air temperature (IAT) sensor rationality may include measuring a first intake air temperature associated with an engine using an IAT sensor when the engine is in a non-operating condition, determining a second intake air temperature associated with the engine using a hot wire air flow meter when the engine is in the non-operating condition, and indicating an IAT sensor fault when a difference between the first and second intake air temperatures exceeds a predetermined temperature limit.

摘要翻译： 评估进气温度（IAT）传感器理性的方法可以包括：当发动机处于非运行状态时，使用IAT传感器测量与发动机相关联的第一进气温度，确定与发动机相关联的第二进气温度 当发动机处于非运行状态时，热线空气流量计，当第一和第二进气温度之间的差超过预定温度极限时，指示IAT传感器故障。