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1. 发明授权

US5398501A Air-fuel ratio control system for internal combustion engines 失效
标题翻译：内燃机空燃比控制系统
公开(公告)号：US5398501A
公开(公告)日：1995-03-21
申请号：US137433
申请日：1993-10-15
申请人： Hiroshi Ito , Yoichi Iwata , Takizawa Tsuyoshi , Toshihiko Sato , Naoki Iida , Takayoshi Nakayama
发明人： Hiroshi Ito , Yoichi Iwata , Takizawa Tsuyoshi , Toshihiko Sato , Naoki Iida , Takayoshi Nakayama
IPC分类号： F01N3/20 , F01N11/00 , F02D41/14 , F02D41/22
CPC分类号： F02D41/1441 , F01N11/007 , F02D41/1475 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： An air-fuel ratio control system for an internal combustion engine having a catalytic converter arranged in the exhaust system, a first air-fuel ratio sensor arranged upstream of the catalytic converter, and a second air-fuel ratio sensor arranged downstream of the catalytic converter, calculates an air-fuel ratio control variable, based on an output from the second air-fuel ratio sensor. An air-fuel ratio correction amount is calculated based on an output from the first air-fuel ratio sensor and the air-fuel ratio control variable. The air-fuel ratio of a mixture supplied to the engine is controlled based on the air-fuel ratio correction amount. The air-fuel ratio control variable is corrected in the rich direction such that the air-fuel ratio of the mixture supplied to the engine becomes richer, when deterioration of the catalytic converter is detected.
摘要翻译：一种用于内燃机的空燃比控制系统，其具有布置在排气系统中的催化转化器，布置在催化转化器上游的第一空燃比传感器和布置在催化转化器下游的第二空燃比传感器根据来自第二空燃比传感器的输出，计算空燃比控制变量。基于第一空燃比传感器的输出和空燃比控制变量来计算空燃比校正量。基于空燃比校正量来控制供给到发动机的混合物的空燃比。当检测到催化转化器的劣化时，空燃比控制变量在富方向上被校正，使得供给发动机的混合物的空燃比变得更加丰富。

2. 发明授权

US5406789A Air-fuel ratio control system for internal combustion engines 失效
标题翻译：内燃机空燃比控制系统
公开(公告)号：US5406789A
公开(公告)日：1995-04-18
申请号：US138469
申请日：1993-10-15
申请人： Tsuyoshi Takizawa , Hiroshi Ito , Yoichi Iwata , Toshihiko Sato , Naoki Iida , Takayoshi Nakayama
发明人： Tsuyoshi Takizawa , Hiroshi Ito , Yoichi Iwata , Toshihiko Sato , Naoki Iida , Takayoshi Nakayama
IPC分类号： F01N3/20 , F01N11/00 , F02D41/14
CPC分类号： F01N11/007 , F02D41/1441 , F02D41/1477 , F02D41/1486 , F01N2550/02 , F01N2900/0422 , F02D41/1456 , Y02T10/47
摘要： An air-fuel ratio control system for an internal combustion engine having a catalytic converter arranged in the exhaust system, and an air-fuel ratio sensor arranged upstream of the catalytic converter calculates an air-fuel ratio correction amount by means of proportional control and integral control based on an output from the air-fuel ratio sensor, and controls an air-fuel ratio of a mixture supplied to the engine, based on the air-fuel ratio correction amount. A control frequency at which the air-fuel ratio control is carried out is increased when deterioration of the catalytic converter is detected.
摘要翻译：一种用于内燃机的空燃比控制系统，其具有布置在排气系统中的催化转化器，并且布置在催化转化器上游的空燃比传感器通过比例控制和积分计算空燃比校正量基于空燃比传感器的输出进行控制，并且基于空燃比校正量来控制供给发动机的混合物的空燃比。当检测到催化转化器的劣化时，进行空燃比控制的控制频率增加。

3. 发明授权

US5379591A Air-fuel ratio control system for internal combustion engines 失效
标题翻译：内燃机空燃比控制系统
公开(公告)号：US5379591A
公开(公告)日：1995-01-10
申请号：US187724
申请日：1994-01-28
申请人： Yoichi Iwata , Naoki Iida , Tsuyoshi Takizawa , Yasunari Seki , Toshihiko Sato , Takayoshi Nakayama
发明人： Yoichi Iwata , Naoki Iida , Tsuyoshi Takizawa , Yasunari Seki , Toshihiko Sato , Takayoshi Nakayama
IPC分类号： F02D41/14 , F01N3/22
CPC分类号： F02D41/1483 , F02D41/1441 , F02B2275/18 , F02D41/1456
摘要： An air-fuel ratio control system for an internal combustion engine calculates an air-fuel ratio feedback control parameter by proportional-integral control using a proportional factor and an integral factor, based an output signal from a second air-fuel ratio sensor arranged in an exhaust passage at a location upstream of a catalytic converter. An air-fuel ratio correction amount is calculated based on the air-fuel ratio feedback control parameter and an output signal from a first air-fuel ratio sensor arranged in the exhaust passage at a location upstream of the catalytic converter. An inversion period of the output signal from the second air-fuel ratio sensor is measured, and the proportional factor is changed according to the inversion period measured.
摘要翻译：用于内燃机的空燃比控制系统基于来自布置在内燃机中的第二空燃比传感器的输出信号，使用比例因子和积分因子的比例积分控制来计算空燃比反馈控制参数在催化转化器上游位置的排气通道。基于空燃比反馈控制参数和布置在催化转化器上游的排气通道中的第一空燃比传感器的输出信号来计算空燃比校正量。测量来自第二空燃比传感器的输出信号的反转周期，并且根据测量的反转周期改变比例因子。

4. 发明授权

US5437154A Misfire-detecting system for internal combustion engines 失效
标题翻译：内燃机失火检测系统
公开(公告)号：US5437154A
公开(公告)日：1995-08-01
申请号：US207668
申请日：1994-03-09
申请人： Toshihiko Sato , Tsuyoshi Takizawa , Yoichi Iwata , Hiroshi Ito , Takayoshi Nakayama
发明人： Toshihiko Sato , Tsuyoshi Takizawa , Yoichi Iwata , Hiroshi Ito , Takayoshi Nakayama
IPC分类号： F01N3/20 , F01N11/00 , F02B75/02 , F02D41/22 , F02D45/00 , F02P17/12 , G01M15/11
CPC分类号： G01M15/11 , F01N11/007 , F02D41/22 , F02P17/12 , F01N2550/02 , F01N2900/0421 , F01N2900/0422 , F02B2075/027 , F02P2017/125 , Y02T10/40 , Y02T10/47
摘要： A misfire-detecting system for an internal combustion engine has an ECU which detects a value of a parameter representative of a misfiring state of the engine, and also detects the deterioration degree of a catalytic converter arranged in the engine exhaust system. The ECU sets a misfire-determining reference value, based on the detected deterioration degree of the catalytic converter, compares between the detected value of the above parameter and the misfire-determining reference value, and determines whether the engine is in a misfiring state, based on the result of the comparison.
摘要翻译：用于内燃机的失火检测系统具有ECU，其检测表示发动机的不发火状态的参数的值，并且还检测布置在发动机排气系统中的催化转化器的劣化程度。基于检测到的催化转化器的劣化程度，ECU设定失火判定基准值，比较上述参数的检测值和失火判定基准值，并基于发动机是否处于失火状态对比结果。

5. 发明授权

US5396766A Abnormality-detecting device for internal combustion engines 失效
标题翻译：内燃机异常检测装置
公开(公告)号：US5396766A
公开(公告)日：1995-03-14
申请号：US98798
申请日：1993-07-29
申请人： Toshihiko Sato , Yoichi Iwata , Hiroshi Ito , Tsuyoshi Takizawa , Takayoshi Nakayama
发明人： Toshihiko Sato , Yoichi Iwata , Hiroshi Ito , Tsuyoshi Takizawa , Takayoshi Nakayama
IPC分类号： F02D41/14 , F01N11/00 , F02D41/22 , F01N3/20
CPC分类号： F01N11/007 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： An abnormality-detecting device is provided for an internal combustion engine having first and second oxygen sensors arranged in the exhaust system at locations upstream and downstream of a catalytic converter. An ECU detects the degree of deterioration of the catalytic converter, based on an output from the second oxygen sensor, and sets a reference value for determining an abnormality in the engine, based on the detected degree of deterioration of the catalytic converter. The ECU compares between the set reference value and a value based on an output from the first oxygen sensor, and determines the abnormality in the engine, based on the result of the comparison. Upon detection of the abnormality, an LED is actuated to issue an alarm.
摘要翻译：在内燃机中设置异常检测装置，该内燃机具有在催化转化器的上游和下游位置排列在排气系统中的第一和第二氧传感器。 ECU根据第二氧传感器的输出，检测催化转化器的劣化程度，根据检测到的催化转化器的劣化，设定用于判定发动机异常的基准值。 ECU根据比较结果，比较设定基准值和基于第一氧传感器的输出的值，并确定发动机的异常。一旦发现异常，LED被启动发出报警。

6. 发明授权

US5381657A Catalyst deterioration-detecting system for internal combustion engines 失效
标题翻译：内燃机用催化剂劣化检测系统
公开(公告)号：US5381657A
公开(公告)日：1995-01-17
申请号：US183751
申请日：1994-01-21
申请人： Tsuyoshi Takizawa , Yasunari Seki , Yoichi Iwata , Toshihiko Sato , Takayoshi Nakayama
发明人： Tsuyoshi Takizawa , Yasunari Seki , Yoichi Iwata , Toshihiko Sato , Takayoshi Nakayama
IPC分类号： F02D41/14 , F01N3/20 , F01N11/00 , F02D41/22 , F02D45/00
CPC分类号： F01N11/007 , F01N11/002 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： A catalyst deterioration-detecting system is provided for an internal combustion engine having an oxygen concentration sensor arranged in an exhaust system downstream of a catalyst provided therein. An electronic control unit (ECU) controls the air-fuel ratio of a mixture supplied to the engine in response to an output from the oxygen concentration sensor. The ECU detects a value of an inversion period with which the output from the oxygen concentration sensor is inverted with respect to a predetermined reference value. Operating parameter sensors detect a value of at least one operating parameter of the engine related to a flow rate of the exhaust gases in the exhaust system. The ECU determines whether the catalyst is deteriorated, based on the detected value of the inversion period and the detected value of the at least one operating parameter. The ECU corrects the value of the inversion period in dependence on the detected value of the at least one operating parameter.
摘要翻译：本发明提供一种催化剂劣化检测系统，该系统具有布置在设置在其中的催化剂下游的排气系统中的氧浓度传感器。电子控制单元（ECU）响应于氧浓度传感器的输出控制供应到发动机的混合物的空燃比。 ECU检测氧浓度传感器的输出相对于规定的基准值反转的反转期间的值。操作参数传感器检测与排气系统中废气的流量相关的发动机的至少一个操作参数的值。 ECU根据反转期间的检测值和至少一个运行参数的检测值，判定催化剂是否劣化。 ECU根据至少一个操作参数的检测值来校正反转周期的值。

7. 发明授权

US5375416A Air-fuel ratio sensor deterioration-detecting device for internal combustion engines 失效
标题翻译：用于内燃机的空燃比传感器劣化检测装置
公开(公告)号：US5375416A
公开(公告)日：1994-12-27
申请号：US184048
申请日：1994-01-21
申请人： Yoichi Iwata , Toshihiko Sato , Yasunari Seki , Tsuyoshi Takizawa , Takayoshi Nakayama
发明人： Yoichi Iwata , Toshihiko Sato , Yasunari Seki , Tsuyoshi Takizawa , Takayoshi Nakayama
IPC分类号： F01N3/20 , F02D41/14 , F02D41/22 , F02D45/00 , F01N3/22
CPC分类号： F02D41/1495
摘要： An air-fuel ratio sensor deterioration-detecting device for an internal combustion engine having a catalytic converter arranged in the exhaust system, and first and second air-fuel ratio sensors arranged upstream and downstream of the catalytic converter respectively has an ECU which calculates an air-fuel ratio correction amount, based on outputs from the first air-fuel ratio sensors, and detects deterioration of the first air-fuel ratio sensor, based on the output from the first air-fuel ratio sensor. The ECU inhibits detection of deterioration of the first air-fuel ratio sensor when the air-fuel ratio correction amount falls outside a predetermined range.
摘要翻译：具有设置在排气系统中的催化转化器的内燃机的空燃比传感器劣化检测装置，分别位于催化转化器的上游和下游的第一和第二空燃比传感器分别具有计算空气的ECU - 燃料比校正量，基于来自第一空燃比传感器的输出，并且基于第一空燃比传感器的输出来检测第一空燃比传感器的劣化。当空燃比校正量落在预定范围之外时，ECU禁止检测第一空燃比传感器的劣化。

8. 发明授权

US5386695A Air-fuel ratio control system for internal combustion engines, having catalytic converter deterioration-detecting function 失效
标题翻译：具有催化转化器劣化检测功能的内燃机空燃比控制系统
公开(公告)号：US5386695A
公开(公告)日：1995-02-07
申请号：US183750
申请日：1994-01-21
申请人： Yoichi Iwata , Toshihiko Sato , Yasunari Seki , Tsuyoshi Takizawa , Takayoshi Nakayama
发明人： Yoichi Iwata , Toshihiko Sato , Yasunari Seki , Tsuyoshi Takizawa , Takayoshi Nakayama
IPC分类号： F01N3/20 , F01N11/00 , F02D41/14 , F02D41/22 , F01N3/22
CPC分类号： F01N11/007 , F01N2900/0422 , Y02T10/47
摘要： An air-fuel ratio control system for an internal combustion engine having a catalytic converter arranged in the exhaust system, and first and second air-fuel ratio sensors arranged upstream and downstream of the catalytic converter respectively has an ECU which calculates an air-fuel ratio correction amount, based at least on an output from the first air-fuel ratio sensor, and detects deterioration of the catalytic converter, based on an output from the second air-fuel ratio sensor when the engine is in a predetermined operating condition. The ECU inhibits detection of deterioration of the catalytic converter when the air-fuel ratio correction amount falls outside a predetermined range.
摘要翻译：具有排气系统中具有催化转化器的内燃机的空燃比控制系统以及分别位于催化转化器的上游和下游的第一和第二空燃比传感器分别具有计算空燃比的ECU 校正量，至少基于第一空燃比传感器的输出，并且当发动机处于预定操作状态时，基于来自第二空燃比传感器的输出来检测催化转化器的劣化。当空燃比校正量落在预定范围之外时，ECU禁止检测催化转化器的劣化。

9. 发明授权

US5485382A Oxygen sensor deterioration-detecting system for internal combustion engines 失效
标题翻译：内燃机氧传感器劣化检测系统
公开(公告)号：US5485382A
公开(公告)日：1996-01-16
申请号：US226007
申请日：1994-04-11
申请人： Yasunari Seki , Toshihiko Sato , Naoki Iida , Yoichi Iwata
发明人： Yasunari Seki , Toshihiko Sato , Naoki Iida , Yoichi Iwata
IPC分类号： F02D41/14 , F02D41/22 , G01N33/00 , G06G7/70 , F01N3/00 , G06F19/00
CPC分类号： F02D41/1443 , F02D41/1495 , G01N33/007
摘要： An oxygen sensor deterioration-detecting system for an internal combustion engine having a plurality of groups of cylinders groups, an exhaust system having a plurality of exhaust passages extending, respectively, from the cylinder groups, and catalytic converters arranged in the exhaust system, and a plurality of upstream oxygen sensors arranged, respectively, in the exhaust passages at locations upstream of the catalytic converters, includes a single downstream oxygen sensor arranged in a confluent portion of the exhaust passages at a location downstream of the catalytic converters, for detecting the mixed air-fuel ratio of exhaust gases emitted from the cylinder groups. An ECU is responsive to outputs from the upstream oxygen sensors and an output from the downstream oxygen sensor, for determining air-fuel ratio control amounts for respective ones of the cylinder groups, and for controlling the air-fuel ratios of air-fuel mixtures supplied into the respective cylinder groups by the use of the air-fuel ratio control amounts determined. The ECU detects deterioration of each upstream oxygen sensor, based on an output from the upstream oxygen sensor obtained by the air-fuel ratio control based on a corresponding one of the air-fuel ratio control amounts.
摘要翻译：一种用于具有多组气缸组的内燃机的氧传感器劣化检测系统，具有分别从气缸组延伸的多个排气通道的排气系统和布置在排气系统中的催化转化器，分别在催化转化器上游的排气通道中排列的多个上游氧传感器包括在催化转化器的下游位置排列在排气通道的汇合部分中的单个下游氧传感器，用于检测混合空气 - 从气缸组排放的废气的燃料比。 ECU响应来自上游氧气传感器的输出和来自下游氧气传感器的输出，用于确定各个气缸组的空燃比控制量，并且用于控制供应的空气 - 燃料混合物的空燃比通过使用所确定的空燃比控制量进入各气缸组。 ECU根据空燃比控制得到的上游氧传感器的输出，根据空燃比控制量的相应一个，检测上游氧传感器的劣化。

10. 发明授权

US5396765A Oxygen sensor deterioration-detecting device for internal combustion engines 失效
标题翻译：内燃机用氧传感器劣化检测装置
公开(公告)号：US5396765A
公开(公告)日：1995-03-14
申请号：US98049
申请日：1993-07-28
申请人： Hiroshi Maruyama , Tsuyoshi Takizawa , Toshihiko Sato , Hiroshi Ito , Yasunari Seki , Takayoshi Nakayama
发明人： Hiroshi Maruyama , Tsuyoshi Takizawa , Toshihiko Sato , Hiroshi Ito , Yasunari Seki , Takayoshi Nakayama
IPC分类号： F02D41/14 , F02D41/22 , F02D45/00 , F01N3/20
CPC分类号： F02D41/1441 , F02D41/1495
摘要： The air-furl ratio of an air-fuel mixture supplied to an internal combustion engine is controlled in response to an output from at least one oxygen sensor arranged in an exhaust passage for detecting concentration of oxygen present in exhaust gases. The deterioration of the at least one oxygen sensor is detected based on the output therefrom. When the engine is detected to be in a predetermined abnormal operating state, it is not permitted to monitor the output from the oxygen sensor for detecting deterioration thereof.
摘要翻译：响应于布置在排气通道中的至少一个氧传感器的输出来控制供应到内燃机的空气燃料混合物的空气比，用于检测废气中存在的氧气的浓度。基于其输出来检测至少一个氧传感器的劣化。当检测到发动机处于预定的异常运行状态时，不允许监视氧传感器的输出以检测其劣化。

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