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21.发明授权公开(公告)号：US06904751B2
公开(公告)日：2005-06-14
申请号：US10454329
申请日：2003-06-04
CPC分类号： F01N11/007 , F01N11/002 , F01N13/0097 , F01N2550/02 , F02D41/0295 , F02D41/1456 , F02D41/1477 , F02D2200/0816 , Y02T10/47
摘要： A system and method for controlling an internal combustion engine for low emissions include an inner feedback control loop to control the engine fuel/air ratio with feedback provided by a first exhaust gas sensor and an outer feedback control loop that modifies a reference fuel/air ratio provided to the inner feedback control loop based on feedback signals provided by a second exhaust gas sensor positioned downstream relative to a portion of the catalyst and a third exhaust gas sensor positioned downstream relative to the second exhaust gas sensor. Catalyst gains are determined by modeling the catalyst as an integrator with an unknown gain and estimating the catalyst gain based on the exhaust gas sensors with the gain used to monitor catalyst performance and/or modify the engine fuel/air ratio.
摘要翻译： 用于控制用于低排放的内燃机的系统和方法包括内部反馈控制回路，以通过由第一废气传感器和外部反馈控制回路提供的反馈来控制发动机燃料/空气比，所述外部反馈控制回路修改参考燃料/空气比 基于由相对于催化剂的一部分位于下游的第二排气传感器提供的反馈信号和位于第二排气传感器下游的第三排气传感器提供给内部反馈控制回路。 催化剂增益通过将催化剂模拟为具有未知增益的积分器来确定，并且基于具有用于监测催化剂性能和/或改变发动机燃料/空气比的增益的废气传感器估计催化剂增益。
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公开(公告)号：US06363715B1
公开(公告)日：2002-04-02
申请号：US09561643
申请日：2000-05-02
申请人： David Karl Bidner , Gopichandra Sumilla , Imad Hassan Makki , James Michael Kerns , Stephen B. Smith
发明人： David Karl Bidner , Gopichandra Sumilla , Imad Hassan Makki , James Michael Kerns , Stephen B. Smith
IPC分类号： F01N300
CPC分类号： F02D41/1408 , F02D41/0235 , F02D41/146 , F02D41/1475 , F02D2041/142 , F02D2200/0602
摘要： An air/fuel control method for an engine including a NOx sensor in operative relationship to a catalytic converter. The method comprises the steps of providing a base fuel signal related to a quantity of air inducted into the engine and generating a bias signal for biasing the base fuel signal towards a leaner air/fuel ratio. The output of the NOx sensor is monitored to detect a predetermined exhaust gas NOx value representing a predefined NOx conversion efficiency. The base fuel signal is then modified as a function of the bias signal corresponding to the predetermined exhaust gas NOx value to maintain the catalytic converter within a desired efficiency range. In one aspect of the invention, the process of detecting the edge of the NOx conversion efficiency window is executed at predetermined time periods measured by the distance the vehicle traveled, or the elapsed time since last base fuel value modification.
摘要翻译： 一种用于包括与催化转化器操作关系的NOx传感器的发动机的空气/燃料控制方法。 该方法包括以下步骤：提供与引入发动机的空气量相关的基本燃料信号，并产生用于将基本燃料信号偏向较冷空气/燃料比的偏置信号。 监测NOx传感器的输出以检测表示预定的NOx转化效率的预定排气NOx值。 然后基本燃料信号作为与预定排气NOx值对应的偏置信号的函数被修改，以将催化转化器维持在期望的效率范围内。 在本发明的一个方面，检测NOx转化效率窗口的边缘的过程是在由车辆行驶的距离测量的预定时间段或从最后基本燃料值修改开始的经过时间之后执行的。
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公开(公告)号：US09002624B2
公开(公告)日：2015-04-07
申请号：US13557101
申请日：2012-07-24
CPC分类号： F02D13/06 , F02D13/0207 , F02D13/0219 , F02D19/084 , F02D41/0002 , F02D41/005 , F02D41/006 , F02D41/0082 , F02D2041/001 , F02M26/05 , F02M26/06 , F02M26/43 , F02M26/46 , F02M26/47 , Y02T10/18 , Y02T10/36 , Y02T10/42 , Y02T10/47
摘要： Methods and systems are provided for adjusting cylinder valve timings to enable a group of cylinders to operate and combust while another group of cylinders on a second are selectively deactivated. Valve timing may be adjusted to allow flow of air through the inactive cylinders to be reduced, lowering catalyst regeneration requirements upon reactivation. The valve timing may alternatively be adjusted to enable exhaust gas to be recirculated to the active cylinders via the inactive cylinders, providing cooled EGR benefits.
摘要翻译： 提供了方法和系统，用于调节气缸阀定时，以使一组气缸能够操作和燃烧，而另一组气缸在一秒钟内被选择性地停用。 可以调整阀门正时以允许空气流过惰性气瓶以减少，从而在再次激活时降低催化剂再生需求。 可替代地，可以调节气门正时以使废气能够通过非活性气缸再循环到主动气缸，从而提供冷却的EGR益处。
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公开(公告)号：US20140032083A1
公开(公告)日：2014-01-30
申请号：US13557101
申请日：2012-07-24
CPC分类号： F02D13/06 , F02D13/0207 , F02D13/0219 , F02D19/084 , F02D41/0002 , F02D41/005 , F02D41/006 , F02D41/0082 , F02D2041/001 , F02M26/05 , F02M26/06 , F02M26/43 , F02M26/46 , F02M26/47 , Y02T10/18 , Y02T10/36 , Y02T10/42 , Y02T10/47
摘要： Methods and systems are provided for adjusting cylinder valve timings to enable a group of cylinders to operate and combust while another group of cylinders on a second are selectively deactivated. Valve timing may be adjusted to allow flow of air through the inactive cylinders to be reduced, lowering catalyst regeneration requirements upon reactivation. The valve timing may alternatively be adjusted to enable exhaust gas to be recirculated to the active cylinders via the inactive cylinders, providing cooled EGR benefits.
摘要翻译： 提供了方法和系统，用于调节气缸阀定时，以使一组气缸能够操作和燃烧，而另一组气缸在一秒钟内被选择性地停用。 可以调整阀门正时以允许空气流过惰性气瓶以减少，从而在再次激活时降低催化剂再生需求。 可替代地，可以调节气门正时以使废气能够通过非活性气缸再循环到主动气缸，从而提供冷却的EGR益处。
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公开(公告)号：US20100223921A1
公开(公告)日：2010-09-09
申请号：US12396782
申请日：2009-03-03
申请人： Michael James Uhrich , Stephen B. Smith , James Michael Kerns , Shane Elwart , Jason Aaron Lupescu
发明人： Michael James Uhrich , Stephen B. Smith , James Michael Kerns , Shane Elwart , Jason Aaron Lupescu
IPC分类号： F01N3/021
CPC分类号： F01N3/0807 , F01N3/0835 , F01N3/0871 , F01N2240/36 , F01N2410/03 , F01N2410/12 , F01N2470/30 , Y02T10/20 , Y02T10/22
摘要： Methods and systems are provided for operating an engine having a hydrocarbon retaining system and an emission control device coupled to an engine exhaust, the engine exhaust comprising a venturi. One example method comprises, during a storing condition, routing exhaust gas through the venturi without generating a venturi action, and then to the hydrocarbon retaining system, while bypassing the emission control device, to store hydrocarbons in the hydrocarbon retaining system, and during a purging condition, routing exhaust gas through the venturi while generating venturi action, then to the emission control device, and then to the hydrocarbon retaining system, to purge stored hydrocarbons, wherein a flow of purged hydrocarbons is drawn back to the venturi via venturi action.
摘要翻译： 提供了用于操作具有碳氢化合物保持系统的发动机和耦合到发动机排气的排放控制装置的方法和系统，所述发动机排气包括文氏管。 一个示例性方法包括在储存条件期间，通过文丘里管排出废气而不产生文丘里管作用，然后在绕过排放控制装置的同时，将碳氢化合物储存在碳氢化合物保留系统中并在清洗期间 条件是，通过文丘里管排出废气，同时产生文氏管作用，然后排放到排放控制装置，然后到烃保留系统，以清除储存的碳氢化合物，其中通过文丘里作用将清除的烃流引导回文丘里管。
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公开(公告)号：US09151216B2
公开(公告)日：2015-10-06
申请号：US13106213
申请日：2011-05-12
IPC分类号： F01N3/00 , F02B37/007 , F01N3/08 , F02B29/04 , F02B37/00 , F02D9/02 , F02D17/02 , F02D35/02 , F02D41/00 , F02D41/02 , F02M25/07 , F02D11/10 , F02D41/38
CPC分类号： F02B37/007 , F01N3/0814 , F01N3/0842 , F02B29/0412 , F02B37/001 , F02B37/002 , F02D9/02 , F02D11/10 , F02D17/02 , F02D35/027 , F02D41/0007 , F02D41/0055 , F02D41/0087 , F02D41/0275 , F02D41/0295 , F02D41/38 , F02D2041/002 , F02D2200/0802 , F02D2250/26 , F02M26/08 , F02M26/24 , F02M26/42 , Y02T10/14 , Y02T10/144 , Y02T10/146 , Y02T10/47
摘要： Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection.
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公开(公告)号：US20120285161A1
公开(公告)日：2012-11-15
申请号：US13106259
申请日：2011-05-12
CPC分类号： F02P5/152 , F01N13/011 , F01N13/107 , F01N2430/02 , F02B37/00 , F02D35/027 , F02D41/0087 , F02D41/027 , F02D2200/0802 , Y02T10/46
摘要： Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection.
摘要翻译： 提供了用于在可变排量发动机系统中至少基于废气催化剂的再生状态来选择用于选择性停用的一组气缸的方法和系统。 一个或多个阀门和节流阀的位置可以根据选择性停用来调节，以减少通过禁用气缸的回流，同时还保持下游排气催化剂的条件。 也可以基于去激活来调整预点火和爆震检测窗口和阈值，以提高爆震和预点火检测的效率。
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公开(公告)号：US08166957B2
公开(公告)日：2012-05-01
申请号：US13170989
申请日：2011-06-28
申请人： Jason Aaron Lupescu , Daniel Joseph Styles , James Michael Kerns , Michael James Uhrich , Stephen B. Smith , David A. May
发明人： Jason Aaron Lupescu , Daniel Joseph Styles , James Michael Kerns , Michael James Uhrich , Stephen B. Smith , David A. May
CPC分类号： F01N3/0835 , F01N2410/00 , F02B29/0406 , F02D9/04 , F02D9/1055 , F02D41/0065 , F02M26/05 , F02M26/06 , F02M26/10 , F02M26/15 , F02M26/16 , F02M26/24 , F02M26/47 , Y02T10/20 , Y02T10/47
摘要： Systems and methods are provided for operating an engine exhaust system. In one example, a system comprises a first valve, and a second valve coupled to the first valve via a shaft. A first position of the shaft situates the first valve closed and the second valve open, a second position situates the second valve closed and the first valve open by a first amount, and a third position situates the second valve closed and the first valve open by a second, larger amount.
摘要翻译： 提供了用于操作发动机排气系统的系统和方法。 在一个示例中，系统包括第一阀和经由轴联接到第一阀的第二阀。 轴的第一位置使第一阀闭合并且第二阀打开，第二位置使第二阀关闭并且第一阀打开第一量，第三位置将第二阀闭合和第一阀打开通过 第二，更大的数量。
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公开(公告)号：US08161733B2
公开(公告)日：2012-04-24
申请号：US12396782
申请日：2009-03-03
申请人： Michael James Uhrich , Stephen B. Smith , James Michael Kerns , Shane Elwart , Jason Aaron Lupescu
发明人： Michael James Uhrich , Stephen B. Smith , James Michael Kerns , Shane Elwart , Jason Aaron Lupescu
IPC分类号： F01N3/00
CPC分类号： F01N3/0807 , F01N3/0835 , F01N3/0871 , F01N2240/36 , F01N2410/03 , F01N2410/12 , F01N2470/30 , Y02T10/20 , Y02T10/22
摘要： Methods and systems are provided for operating an engine having a hydrocarbon retaining system and an emission control device coupled to an engine exhaust, the engine exhaust comprising a venturi. One example method comprises, during a storing condition, routing exhaust gas through the venturi without generating a venturi action, and then to the hydrocarbon retaining system, while bypassing the emission control device, to store hydrocarbons in the hydrocarbon retaining system, and during a purging condition, routing exhaust gas through the venturi while generating venturi action, then to the emission control device, and then to the hydrocarbon retaining system, to purge stored hydrocarbons, wherein a flow of purged hydrocarbons is drawn back to the venturi via venturi action.
摘要翻译： 提供了用于操作具有碳氢化合物保持系统的发动机和耦合到发动机排气的排放控制装置的方法和系统，所述发动机排气包括文氏管。 一个示例性方法包括在储存条件期间，通过文丘里管排出废气而不产生文丘里管作用，然后在绕过排放控制装置的同时，将碳氢化合物储存在碳氢化合物保留系统中并在清洗期间 条件是，通过文丘里管排出废气，同时产生文氏管作用，然后排放到排放控制装置，然后到烃保留系统，以清除储存的碳氢化合物，其中通过文丘里作用将清除的烃流引导回文丘里管。
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公开(公告)号：US20110265453A1
公开(公告)日：2011-11-03
申请号：US13106138
申请日：2011-05-12
CPC分类号： F01N3/0842 , F01N13/011 , F02B29/0412 , F02B37/007 , F02B37/16 , F02B37/18 , F02D17/02 , F02D41/0002 , F02D41/0007 , F02D41/0055 , F02D41/0087 , F02D41/0235 , F02D41/027 , F02D2200/0802 , F02D2250/14 , F02M26/08 , F02M26/38 , Y02T10/146 , Y02T10/42
摘要： Methods and systems are provided for selecting a group of cylinders for selective deactivation, in a variable displacement engine system, based at least on a regeneration state of an exhaust catalyst. The position of one or more valves and throttles may be adjusted based on the selective deactivation to reduce back-flow through the disabled cylinders while also maintaining conditions of a downstream exhaust catalyst. Pre-ignition and knock detection windows and thresholds may also be adjusted based on the deactivation to improve the efficiency of knock and pre-ignition detection.
摘要翻译： 提供了用于在可变排量发动机系统中至少基于废气催化剂的再生状态来选择用于选择性停用的一组气缸的方法和系统。 一个或多个阀门和节流阀的位置可以根据选择性停用来调节，以减少通过禁用气缸的回流，同时还保持下游排气催化剂的条件。 也可以基于去激活来调整预点火和爆震检测窗口和阈值，以提高爆震和预点火检测的效率。
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