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公开(公告)号：EP1128046B1
公开(公告)日：2006-04-26
申请号：EP01104372.6
申请日：2001-02-23
CPC分类号： B01D53/9454 , B01D53/9495 , F01N3/0835 , F01N11/007 , F01N2550/02 , F01N2550/03 , F02D41/0295 , F02D41/1456 , F02D2200/0814 , Y02T10/20 , Y02T10/22 , Y02T10/47
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公开(公告)号：EP1128045A3
公开(公告)日：2003-09-10
申请号：EP01104307.2
申请日：2001-02-22
IPC分类号： F02D41/14
CPC分类号： F02D41/1441 , F01N2570/16 , F02D41/0295 , F02D41/1456 , F02D41/2441 , F02D41/2454 , F02D41/2474 , F02D2200/0814
摘要： A catalyst 3 which has oxygen storage performance is installed in an engine exhaust passage 2, an oxygen storage amount is estimated based on the output of an upstream air-fuel ratio sensor 4 installed in the upstream of the catalyst 3, and an air-fuel ratio is controlled so that this oxygen storage amount coincides with a target value. When the output of a downstream air-fuel ratio sensor 5 has become lean or rich for longer than a fixed time, the output of the upstream air-fuel ratio sensor 4 is corrected based on the output of the downstream air-fuel ratio sensor 5 placed in the downstream of the catalyst 3. In this way, the output fluctuation due to deterioration of the air-fuel ratio sensor 4 upstream of the catalyst is corrected, and the catalyst oxygen storage amount is always precisely controlled to the target value.
摘要翻译： 具有储氧性能的催化剂3安装在发动机排气通道2中，基于安装在催化剂3的上游的上游空燃比传感器4的输出和空气燃料来估计储氧量 控制该比例使得该储氧量与目标值一致。 当下游空燃比传感器5的输出变得稀薄或浓缩超过固定时间时，上游空燃比传感器4的输出根据下游空燃比传感器5的输出被校正 放置在催化剂3的下游。以这种方式，校正了由于催化剂上游的空燃比传感器4的劣化引起的输出波动，并且催化剂氧气储存量总是精确地控制在目标值。
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公开(公告)号：EP1128046A3
公开(公告)日：2003-07-09
申请号：EP01104372.6
申请日：2001-02-23
CPC分类号： B01D53/9454 , B01D53/9495 , F01N3/0835 , F01N11/007 , F01N2550/02 , F01N2550/03 , F02D41/0295 , F02D41/1456 , F02D2200/0814 , Y02T10/20 , Y02T10/22 , Y02T10/47
摘要： An oxygen storage amount of the catalyst (3) is estimated using a detection result from a front A/F sensor (4). An HC storage amount is calculated as a time integral of the product of the storage rate by the catalyst (3), the air-fuel ratio and the intake air amount, and a target air-fuel ratio is corrected so that a deficiency relative to a target amount of the oxygen storage amount is compensated based on this computation result.
摘要翻译： 使用来自前方A / F传感器（4）的检测结果，推定催化剂（3）的氧吸藏量。 HC存储量被计算为催化剂（3）的存储率，空燃比和进气量的乘积的时间积分，并且目标空燃比被校正为相对于 基于该计算结果来补偿氧气存储量的目标量。
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公开(公告)号：EP1128046A2
公开(公告)日：2001-08-29
申请号：EP01104372.6
申请日：2001-02-23
CPC分类号： B01D53/9454 , B01D53/9495 , F01N3/0835 , F01N11/007 , F01N2550/02 , F01N2550/03 , F02D41/0295 , F02D41/1456 , F02D2200/0814 , Y02T10/20 , Y02T10/22 , Y02T10/47
摘要： An oxygen storage amount of the catalyst (3) is estimated using a detection result from a front A/F sensor (4). An HC storage amount is calculated as a time integral of the product of the storage rate by the catalyst (3), the air-fuel ratio and the intake air amount, and a target air-fuel ratio is corrected so that a deficiency relative to a target amount of the oxygen storage amount is compensated based on this computation result.
摘要翻译： 使用来自前A / F传感器（4）的检测结果来估计催化剂（3）的储氧量。 计算HC储存量作为催化剂（3）的储存率乘积的时间积分，空燃比和进气量，校正目标空燃比，使得相对于 基于该计算结果来补偿氧气存储量的目标量。
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公开(公告)号：EP1128045B1
公开(公告)日：2005-12-28
申请号：EP01104307.2
申请日：2001-02-22
IPC分类号： F02D41/14
CPC分类号： F02D41/1441 , F01N2570/16 , F02D41/0295 , F02D41/1456 , F02D41/2441 , F02D41/2454 , F02D41/2474 , F02D2200/0814
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公开(公告)号：EP1128045A2
公开(公告)日：2001-08-29
申请号：EP01104307.2
申请日：2001-02-22
IPC分类号： F02D41/14
CPC分类号： F02D41/1441 , F01N2570/16 , F02D41/0295 , F02D41/1456 , F02D41/2441 , F02D41/2454 , F02D41/2474 , F02D2200/0814
摘要： A catalyst 3 which has oxygen storage performance is installed in an engine exhaust passage 2, an oxygen storage amount is estimated based on the output of an upstream air-fuel ratio sensor 4 installed in the upstream of the catalyst 3, and an air-fuel ratio is controlled so that this oxygen storage amount coincides with a target value. When the output of a downstream air-fuel ratio sensor 5 has become lean or rich for longer than a fixed time, the output of the upstream air-fuel ratio sensor 4 is corrected based on the output of the downstream air-fuel ratio sensor 5 placed in the downstream of the catalyst 3. In this way, the output fluctuation due to deterioration of the air-fuel ratio sensor 4 upstream of the catalyst is corrected, and the catalyst oxygen storage amount is always precisely controlled to the target value.
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