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1. 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。

2. 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。

3. 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。

4. 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。

5. 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。

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

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。

9. 发明授权

US5325664A System for determining deterioration of catalysts of internal combustion engines 失效
标题翻译：用于确定内燃机催化剂劣化的系统
公开(公告)号：US5325664A
公开(公告)日：1994-07-05
申请号：US961794
申请日：1992-10-16
申请人： Yasunari Seki , Toshihiko Sato , Katuhiro Kumagai , Hiroshi Maruyama , Yoichi Iwata , Tsuyoshi Takizawa , Kenichi Maeda , Shigetaka Kuroda , Masataka Chikamatsu , Shukoh Terata , Kazutomo Sawamura , Hajime Uto , Takuya Aoki , Makoto Kobayashi
发明人： Yasunari Seki , Toshihiko Sato , Katuhiro Kumagai , Hiroshi Maruyama , Yoichi Iwata , Tsuyoshi Takizawa , Kenichi Maeda , Shigetaka Kuroda , Masataka Chikamatsu , Shukoh Terata , Kazutomo Sawamura , Hajime Uto , Takuya Aoki , Makoto Kobayashi
IPC分类号： F01N11/00 , F01N13/02 , F02F3/26
CPC分类号： F01N11/002 , F01N11/007 , F01N13/009 , F01N2550/02 , F01N2900/0422 , Y02T10/47
摘要： A catalyst deterioration-determining system determines deterioration of a catalyst arranged in the exhaust passage of an internal combustion engine. An ECU is responsive to an output from an O.sub.2 sensor arranged upstream of the catalyst or outputs from O.sub.2 sensors arranged upstream and downstream of the catalyst for controlling the air-fuel ratio of a mixture supplied to the engine by means of an air-fuel ratio correction value (first air-fuel ratio control). When the engine is in a predetermined operating condition, the system effects changeover from the first air-fuel ratio control to a second air-fuel ratio control which is responsive to the output from the downstream O.sub.2 sensor for controlling the air-fuel ratio of the mixture by means of the air-fuel ratio correction value. After the changeover has been effected, a time period is measured which elapses from the time the second air-fuel ratio control causes a change in the air-fuel ratio correction value from a richer side to a leaner side or vice versa with respect to a stoichiometric air-fuel ratio to the time the output from the downstream O.sub.2 sensor is inverted from the richer side to the leaner side or vice versa with respect to the stoichiometric air-fuel ratio. It is determined that the catalyst is deteriorated, when the measured time period is shorter than the predetermined time period.
摘要翻译：催化剂劣化确定系统确定布置在内燃机的排气通道中的催化剂的劣化。 ECU响应于设置在催化剂上游的O 2传感器的输出或者从设置在催化剂上游和下游的O2传感器输出，用于通过空燃比控制供给发动机的混合物的空燃比校正值（第一空燃比控制）。当发动机处于预定的运行状态时，该系统实现从第一空燃比控制切换到第二空燃比控制，第二空燃比控制响应于来自下游O2传感器的输出，用于控制发动机的空燃比通过空燃比校正值进行混合。在切换已经实现之后，测量从第二空燃比控制引起空燃比校正值从更丰富侧到更瘦侧的变化时间经过的时间段，反之亦然化学计量空燃比与下游O2传感器的输出相对于化学计量空燃比从更丰富的一侧反转到更稀的侧，反之亦然。当测量的时间段短于预定时间段时，确定催化剂劣化。

10. 发明授权

US5605041A 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：US5605041A
公开(公告)日：1997-02-25
申请号：US326391
申请日：1994-10-20
申请人： Yoichi Iwata , Yoshiharu Ave , Takayoshi Nakayama
发明人： Yoichi Iwata , Yoshiharu Ave , Takayoshi Nakayama
IPC分类号： F02D45/00 , F02D41/14 , F01N3/28
CPC分类号： F02D41/1441 , F02D41/1456
摘要： An air-fuel ratio control system for an internal combustion engine comprises upstream and downstream O2 sensors arranged in the exhaust system of the engine at respective locations upstream and downstream of a catalytic converter, for detecting concentration of oxygen in exhaust gases from the engine. An ECU sets a control variable having a value proportional to the difference between an output from the downstream O2 sensor and a first predetermined reference value, and compares between an output from the upstream O2 sensor and a second predetermined reference value, to thereby calculate an air-fuel ratio correction coefficient, based on results of comparison and the set control variable. The air-fuel ratio of an air-fuel mixture supplied to the engine is controlled based on the calculated air-fuel ratio correction coefficient.
摘要翻译：用于内燃机的空燃比控制系统包括在催化转化器的上游和下游的相应位置处布置在发动机的排气系统中的上游和下游O2传感器，用于检测来自发动机的废气中的氧气浓度。 ECU设置具有与下游O2传感器的输出与第一预定参考值之间的差成比例的值的控制变量，并且比较来自上游O 2传感器的输出和第二预定参考值，从而计算空气 - 燃料比率校正系数，基于比较结果和设定控制变量。基于计算出的空燃比校正系数来控制供给发动机的空燃混合气的空燃比。

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