公开(公告)号：US06467254B1

公开(公告)日：2002-10-22

申请号：US09488932

申请日：2000-01-20

申请人： Michael John Cullen ,  Brent Edward Sealy ,  Kenneth John Behr ,  Richard Andrew Booth

发明人： Michael John Cullen ,  Brent Edward Sealy ,  Kenneth John Behr ,  Richard Andrew Booth

IPC分类号： F01N300

CPC分类号： F01N11/007 ,  F01N2550/02 ,  F01N2900/0421 ,  Y02T10/47

摘要： A method and system for diagnosing catalyst operation in an internal combustion engine having a two-bank, three EGO sensor structure includes monitoring when the EGO sensors switch states between rich and lean and determining the ratio between a switch count of the post-catalyst EGO sensor signal and a switch count of a pre-catalyst EGO sensor signal over a selected time period. If the exhaust bank is a one-sensor bank having only a post-catalyst EGO sensor and not a pre-catalyst EGO sensor, the system uses the switch count from the pre-catalyst EGO sensor in the two-sensor bank to calculate the switch ratio, thereby allowing calculation of two switch ratios without two matched pairs of EGO sensors. The switch ratio indicates the efficiency of the catalyst and may be compared with later-generated ratios to monitor converter efficiency over time.

摘要翻译： 用于诊断具有两岸三EGO传感器结构的内燃机中的催化剂操作的方法和系统包括监测EGO传感器何时切换富和贫之间的状态，并确定催化剂后EGO传感器的开关计数之间的比率 信号和催化剂前EGO传感器信号的开关计数。 如果排气组是仅具有催化后EGO传感器且不是催化剂前EGO传感器的单传感器组，则系统使用来自双传感器组中的催化剂前EGO传感器的开关计数来计算开关 比例，从而允许计算两个开关比，而没有两个匹配的EGO传感器对。 开关比表示催化剂的效率，并且可以与后来产生的比率进行比较，以监测转换器随时间的效率。

公开(公告)号：US06276129B1

公开(公告)日：2001-08-21

申请号：US09488417

申请日：2000-01-20

申请人： Richard Andrew Booth ,  Brent Edward Sealy ,  Kenneth John Behr ,  Michael John Cullen

发明人： Richard Andrew Booth ,  Brent Edward Sealy ,  Kenneth John Behr ,  Michael John Cullen

IPC分类号： F01N300

CPC分类号： F02D41/1443 ,  F02D41/2454 ,  F02D41/248

摘要： A method and system for controlling the air/fuel ratio in an internal combustion engine having a first group of cylinders and a second group of cylinders. The first group of cylinders is coupled to a catalyst and at least one oxygen sensor, which provides a first feedback signal. The second group of cylinders is coupled to a catalyst and a post-catalyst oxygen sensor, which provides a second feedback signal. A controller uses the first and second feedback signals to calculate a short-term air/fuel bias value for the second group of cylinders. The controller also calculates a new long-term air/fuel bias value corresponding to the current engine speed and engine. The new long-term air/fuel bias value is based on a previously-calculated long-term air/fuel bias value calculated for the same engine load and speed. A total air/fuel bias value is calculated based on the short-term air/fuel bias value and the long-term air/fuel bias value. The new long-term air/fuel bias value is stored for future calculations.

摘要翻译： 一种用于控制具有第一组气缸和第二组气缸的内燃机中的空燃比的方法和系统。 第一组气缸耦合到催化剂和至少一个氧传感器，其提供第一反馈信号。 第二组汽缸耦合到催化剂和催化后氧传感器，其提供第二反馈信号。 控制器使用第一和第二反馈信号来计算第二组气缸的短期空气/燃料偏置值。 控制器还计算与当前发动机转速和发动机相对应的新的长期空气/燃料偏置值。 新的长期空气/燃料偏差值基于以前计算的相同发动机负载和速度的长期空气/燃料偏差值。 基于短期空气/燃料偏差值和长期空气/燃料偏差值计算总空气/燃料偏差值。 新的长期空气/燃料偏差值被存储用于将来的计算。

公开(公告)号：US06301880B1

公开(公告)日：2001-10-16

申请号：US09488664

申请日：2000-01-20

申请人： Michael John Cullen ,  Brent Edward Sealy ,  Kenneth John Behr ,  Richard Andrew Booth

发明人： Michael John Cullen ,  Brent Edward Sealy ,  Kenneth John Behr ,  Richard Andrew Booth

IPC分类号： F01N300

CPC分类号： F02D41/1477 ,  F02D41/1443

摘要： A method and system for controlling the air/fuel ratio in an internal combustion engine having first and second groups of cylinders coupled to first and second exhaust banks, respectively. The first exhaust bank includes a catalyst and at least a pre-catalyst oxygen sensor. The second exhaust bank includes a catalyst and no more than one post-catalyst oxygen sensor. The oxygen sensors monitor the oxygen content of the exhaust gases in their corresponding exhaust banks and provide feedback signals to a controller. The controller uses the feedback signal from the pre-catalyst oxygen sensor (in the first bank) to calculate desired A/F values in the first group of cylinders. The controller uses both the feedback signal from the pre-catalyst oxygen sensor (in the first bank) and the feedback signal from the post-catalyst oxygen sensor (in the second bank) to calculate desired A/F values for the second group of cylinders.

摘要翻译： 一种用于控制内燃机中的空燃比的方法和系统，所述内燃机分别具有联接到第一和第二排气组的第一和第二组气缸。 第一排气组包括催化剂和至少一种预催化剂氧传感器。 第二排气组包括催化剂和不超过一个催化后氧传感器。 氧传感器监测其相应排气组中废气的氧含量，并向控制器提供反馈信号。 控制器使用来自预催化剂氧传感器（在第一组中）的反馈信号来计算第一组气缸中的所需A / F值。 控制器使用来自预催化剂氧传感器（在第一组中）的反馈信号和来自催化后氧传感器（在第二组中）的反馈信号来计算第二组气缸的期望A / F值 。

公开(公告)号：US06425242B2

公开(公告)日：2002-07-30

申请号：US09895681

申请日：2001-07-02

申请人： Richard Andrew Booth ,  Brent Edward Sealy ,  Kenneth John Behr ,  Michael John Cullen

发明人： Richard Andrew Booth ,  Brent Edward Sealy ,  Kenneth John Behr ,  Michael John Cullen

IPC分类号： F01N300

CPC分类号： F01N11/007 ,  F01N2550/02 ,  Y02T10/47

摘要： A method and system for diagnosing catalyst operation in an internal combustion engine having a two-bank, three EGO sensor structure includes determining the ratio of the arc length between the post-catalyst EGO sensor signal and the arc length of a pre-catalyst EGO sensor signal over a selected time period. If the exhaust bank is a one-sensor bank having only a post-catalyst EGO sensor and no pre-catalyst EGO sensor, the system uses the arc length from the pre-catalyst EGO sensor in the two-sensor bank to calculate the arc length ratio, thereby allowing calculation of two arc length ratios without two matched pairs of EGO sensors. The ratio indicates the efficiency of the catalyst and may be compared with calibratable or experimentally-determined thresholds to monitor converter efficiency over time.

摘要翻译： 用于诊断具有两岸三EGO传感器结构的内燃机中的催化剂操作的方法和系统包括确定催化后EGO传感器信号与预催化剂EGO传感器的电弧长度之间的电弧长度之比 信号在选定的时间段内。 如果排气组是仅具有催化后EGO传感器且没有预催化剂EGO传感器的单传感器组，则系统使用来自双传感器组中的催化剂前EGO传感器的电弧长度来计算电弧长度 比例，从而允许计算两个圆弧长度比，而没有两对EGO传感器。 该比率表示催化剂的效率，并且可以与可校准或实验确定的阈值进行比较，以监测转换器随时间的效率。

公开(公告)号：US06553756B1

公开(公告)日：2003-04-29

申请号：US09785361

申请日：2001-02-16

申请人： Brent Edward Sealy ,  Kenneth John Behr ,  Richard Andrew Booth

发明人： Brent Edward Sealy ,  Kenneth John Behr ,  Richard Andrew Booth

IPC分类号： F01N300

CPC分类号： F02D41/0087 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/011 ,  F02D41/1443 ,  F02D41/1456 ,  F02D41/1474 ,  F02D41/1481 ,  F02D41/1482 ,  F02D41/187 ,  F02D2200/0406 ,  Y02T10/22

摘要： A method for selecting one of first and second cylinder groups of an internal combustion engine is provided. The first and second cylinder groups are coupled with first and second catalytic converters, respectively. The method includes identifying one of the first and second catalytic converters by comparing first and second catalyst parameters, associated with the first and second catalytic converters, respectively, to one another. The first and second catalyst parameters indicate which one of the catalytic converters is more capable of maintaining reduced emissions while adjusting an engine operational parameter. The method further includes selecting one of the first and second cylinder groups coupled to the identified catalytic converter for changing an engine operational parameter in the selected cylinder group.

摘要翻译： 提供一种用于选择内燃机的第一和第二气缸组中的一个的方法。 第一和第二气缸组分别与第一和第二催化转化器耦合。 该方法包括通过将与第一和第二催化转化器相关联的第一和第二催化剂参数彼此比较来识别第一和第二催化转化器中的一个。 第一和第二催化剂参数指示哪个催化转化器在调整发动机操作参数的同时更能够维持减少的排放。 该方法还包括选择与所识别的催化转化器相连的第一和第二气缸组中的一个，以改变所选气缸组中的发动机操作参数。

公开(公告)号：US06553982B1

公开(公告)日：2003-04-29

申请号：US09785720

申请日：2001-02-16

申请人： Richard Andrew Booth ,  Brent Edward Sealy ,  Kenneth John Behr

发明人： Richard Andrew Booth ,  Brent Edward Sealy ,  Kenneth John Behr

IPC分类号： F02D4114

CPC分类号： F02D41/0082 ,  F02D41/1408 ,  F02D41/1443 ,  F02D41/1473 ,  F02D41/1474 ,  F02D41/1493

摘要： A method for controlling the phasing of first and second air/fuel ratio oscillations in first and second cylinder groups, respectively, of an internal combustion engine is provided. The method includes determining a phase difference between the first air/fuel ratio oscillations and the second air/fuel ratio oscillations. The method further includes adjusting a phase of the first air/fuel ratio oscillations so that both first and second air/fuel ratio oscillations are at a predetermined phase offset with respect to one another, while maintaining an average air/fuel bias in the first cylinder group.

摘要翻译： 提供一种用于分别控制内燃机的第一和第二气缸组中的第一和第二空气/燃料比振荡的定相的方法。 该方法包括确定第一空气/燃料比振荡与第二空气/燃料比振荡之间的相位差。 该方法还包括调节第一空气/燃料比振荡的相位，使得第一和第二空气/燃料比振荡都相对于彼此处于预定的相位偏移，同时保持第一气缸中的平均空气/燃料偏压 组。

公开(公告)号：US06550466B1

公开(公告)日：2003-04-22

申请号：US09785769

申请日：2001-02-16

申请人： Kenneth John Behr ,  Brent Edward Sealy ,  Jeffrey Allen Doering ,  Richard Andrew Booth

发明人： Kenneth John Behr ,  Brent Edward Sealy ,  Jeffrey Allen Doering ,  Richard Andrew Booth

IPC分类号： F02D4100

CPC分类号： F02B75/22 ,  F02D41/0082 ,  F02D41/0235 ,  F02D41/1402 ,  F02D41/1443 ,  F02D41/1475 ,  F02D41/1481 ,  F02D41/1498 ,  F02D41/2458 ,  F02D2041/1431 ,  F02D2200/1015

摘要： A method for controlling first and second air/fuel ratio oscillations in first and second cylinder groups, respectively, of an internal combustion engine is provided. The method includes determining a first frequency of the first air/fuel ratio oscillations in the first cylinder group. The method further includes determining a second frequency of the second air/fuel ratio oscillations in the second cylinder group. Finally, the method includes adjusting the first frequency towards the second frequency responsive to a frequency difference between the first and second frequencies.

摘要翻译： 提供一种用于分别控制内燃机的第一和第二气缸组中的第一和第二空气/燃料比振荡的方法。 该方法包括确定第一气缸组中的第一空气/燃料比振荡的第一频率。 该方法还包括确定第二气缸组中的第二空气/燃料比振荡的第二频率。 最后，该方法包括响应于第一和第二频率之间的频率差来调整朝向第二频率的第一频率。

公开(公告)号：US06282888B1

公开(公告)日：2001-09-04

申请号：US09488418

申请日：2000-01-20

申请人： Brent Edward Sealy ,  Kenneth John Behr ,  Richard Andrew Booth

发明人： Brent Edward Sealy ,  Kenneth John Behr ,  Richard Andrew Booth

IPC分类号： F01N300

CPC分类号： F02D41/1443 ,  F02D41/1441 ,  F02D41/1495

摘要： A method and system for controlling the air/fuel ratio in an internal combustion engine having first and second groups of cylinders coupled to first and second exhaust banks, respectively. Each exhaust bank has a catalyst, a pre-catalyst oxygen sensor and a post-catalyst oxygen sensor, wherein the oxygen sensors monitor the air/fuel ratio in their respective exhaust banks and provide corresponding feedback signals to a controller. The controller uses the feedback signals to control the air/fuel ratio in the engine cylinders. When it is detected that one or the other of the pre-catalyst oxygen sensors has degraded, the controller calculates A/F values for the group of cylinders corresponding to the exhaust bank having a degraded EGO sensor based on feedback signals from the three still-functional oxygen sensors.

摘要翻译： 一种用于控制内燃机中的空燃比的方法和系统，所述内燃机分别具有联接到第一和第二排气组的第一和第二组气缸。 每个排气组具有催化剂，预催化剂氧传感器和催化后氧传感器，其中氧传感器监测其各自排气组中的空气/燃料比，并向控制器提供相应的反馈信号。 控制器使用反馈信号来控制发动机气缸中的空燃比。 当检测到催化剂中的氧传感器中的一个或另一个已经劣化时，控制器基于来自三个静止电极的反馈信号来计算与具有劣化的EGO传感器的排气组对应的气缸组的A / F值， 功能氧传感器。

公开(公告)号：US06497228B1

公开(公告)日：2002-12-24

申请号：US09785711

申请日：2001-02-16

申请人： Richard Andrew Booth ,  Brent Edward Sealy ,  Kenneth John Behr

发明人： Richard Andrew Booth ,  Brent Edward Sealy ,  Kenneth John Behr

IPC分类号： F02D4114

CPC分类号： F02D41/1458 ,  F02D37/02 ,  F02D41/1443 ,  F02D41/1474 ,  F02D41/1481 ,  F02D41/1483 ,  F02D41/1495 ,  F02D41/1498 ,  F02D41/18 ,  F02D2200/0406 ,  F02D2200/0816 ,  F02D2200/1015 ,  F02P5/1504

摘要： A control system and method is provided for selecting one of first and second cylinder groups of an internal combustion engine when a frequency of air/fuel ratio oscillations in the selected cylinder group is to be adjusted. The method includes determining which of first and second frequencies of air/fuel ratio oscillations in the first and second cylinder groups, respectively, has a greater frequency. Further, the method includes selecting one of the first and second cylinder groups having the greater frequency of air/fuel ratio oscillations. The selection is made to reduce engine torque fluctuations when changing a frequency of air/fuel ratio oscillations in the selected cylinder group.

摘要翻译： 提供一种控制系统和方法，用于当要调节所选择的气缸组中的空气/燃料比振荡的频率时，选择内燃机的第一和第二气缸组中的一个。 该方法包括确定第一和第二气缸组中的空气/燃料比振荡的第一和第二频率中的哪一个分别具有较大的频率。 此外，该方法包括选择具有较大空/燃比振荡频率的第一和第二气缸组之一。 在选择的气缸组中改变空气/燃料比振荡的频率时，选择减小发动机扭矩波动。

公开(公告)号：US06722122B2

公开(公告)日：2004-04-20

申请号：US10382220

申请日：2003-03-06

申请人： Brent Edward Sealy ,  Kenneth John Behr ,  Richard Andrew Booth

发明人： Brent Edward Sealy ,  Kenneth John Behr ,  Richard Andrew Booth

IPC分类号： F01N300

CPC分类号： F02D41/0087 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/011 ,  F02D41/1443 ,  F02D41/1456 ,  F02D41/1474 ,  F02D41/1481 ,  F02D41/1482 ,  F02D41/187 ,  F02D2200/0406 ,  Y02T10/22

摘要： A method for selecting one of first and second cylinder groups of an internal combustion engine is provided. The first and second cylinder groups are coupled with first and second catalytic converters, respectively. The method includes identifying one of the first and second catalytic converters by comparing first and second catalyst parameters, associated with the first and second catalytic converters, respectively, to one another. The first and second catalyst parameters indicate which one of the catalytic converters is more capable of maintaining reduced emissions while adjusting an engine operational parameter. The method further includes selecting one of the first and second cylinder groups coupled to the identified catalytic converter for changing an engine operational parameter in the selected cylinder group.

摘要翻译： 提供一种用于选择内燃机的第一和第二气缸组中的一个的方法。 第一和第二气缸组分别与第一和第二催化转化器耦合。 该方法包括通过将与第一和第二催化转化器相关联的第一和第二催化剂参数彼此比较来识别第一和第二催化转化器中的一个。 第一和第二催化剂参数指示哪个催化转化器在调整发动机操作参数的同时更能够维持减少的排放。 该方法还包括选择与所识别的催化转化器相连的第一和第二气缸组中的一个，以改变所选气缸组中的发动机操作参数。