公开(公告)号：US5834624A

公开(公告)日：1998-11-10

申请号：US867583

申请日：1997-06-02

申请人： Norihisa Nakagawa

发明人： Norihisa Nakagawa

IPC分类号： G01N27/41 ,  F02D41/06 ,  F02D41/14 ,  F02D41/24 ,  F02D45/00 ,  G01N27/26 ,  G01N27/409 ,  F02D41/00

CPC分类号： F02D41/2474 ,  F02D41/068 ,  F02D41/1496 ,  F02D41/1456 ,  F02D41/2441 ,  F02D41/2454

摘要： The device for detecting the air-fuel ratio in an internal combustion engine comprising an air-fuel ratio sensor arranged in an exhaust system of the engine and passes an electric current when an electric voltage is applied thereto, an air-fuel ratio sensor circuit that applies the electric voltage to the sensor, detects the current and outputs a signal proportional to the magnitude of the detected current, and a memory for storing a conversion map for calculating the air-fuel ratio in the engine corresponding to the output of the air-fuel ratio sensor circuit by the use of a reference air-fuel ratio sensor and the reference air-fuel ratio sensor circuit. The device further comprises: a sensor for determining the sensor inactive state when the difference between a first coolant temperature at the last engine stopped time and a second coolant temperature at the next engine start up time is equal to or more than a determined value; and a map for calibrating an air-fuel ratio in the engine calculated from the conversion map stored in the memory in response to the output from the sensor circuit based on the error between the output data of the sensor circuit when the sensor is determined to be in an inactive state by the sensor and the output data from the sensor circuit corresponding to the stoichiometric air-fuel ratio in the engine that is calculated from the conversion map, thereby correctly and very precisely detecting the air-fuel ratio.

摘要翻译： 用于检测内燃机中的空燃比的装置，包括布置在发动机的排气系统中的空燃比传感器，当施加电压时通过电流;空燃比传感器电路， 将电压施加到传感器，检测电流并输出与检测到的电流的大小成比例的信号;以及存储器，用于存储用于计算发动机中对应于空气 - 燃料的输出的空燃比的转换图， 燃料比传感器电路，通过使用参考空燃比传感器和基准空燃比传感器电路。 该装置还包括：传感器，用于当最后发动机停止时间的第一冷却剂温度与下一个发动机启动时间的第二冷却剂温度之间的差等于或大于确定值时，确定传感器非活动状态; 以及映射表，用于根据传感器电路的输出，根据传感器电路的输出数据之间的误差，确定在存储器中存储的转换映射图中计算出的空燃比， 通过传感器处于非活动状态，和来自传感器电路的输出数据对应于从转换图计算的发动机中的理论空燃比，从而正确且非常精确地检测空燃比。

公开(公告)号：US5249484A

公开(公告)日：1993-10-05

申请号：US890704

申请日：1992-05-29

申请人： Hiroki Matsuoka ,  Norihisa Nakagawa

发明人： Hiroki Matsuoka ,  Norihisa Nakagawa

IPC分类号： F16H61/00 ,  F16H59/24 ,  F16H59/74 ,  F16H61/02 ,  F16H61/04 ,  F16H61/10 ,  F16H61/18 ,  F16H63/50

CPC分类号： B60W30/18 ,  B60W10/04 ,  B60W10/11 ,  B60W30/1819 ,  F16H59/24 ,  F16H61/0213 ,  F16H2061/0096 ,  F16H2061/0227 ,  F16H59/74 ,  Y10T477/693

摘要： A shift control apparatus for an automatic transmission of a motor vehicle, including a sensor for detecting a throttle valve opening which regulates an intake air quantity supplied to the vehicle engine, an engine speed sensor for detecting the engine speed, a vehicle speed sensor for detecting the vehicle running speed, a calculating device for calculating the intake air quantity for a steady running of the vehicle, based on the detected throttle valve opening and engine speed, a processing device for processing the calculated intake air quantity to compensate the calculated intake air quantity for a first-order time lag and obtain an estimated intake air quantity, and an automatic shift control device for automatically selecting an optimum operating position of the automatic transmission, based on the estimated intake air quantity and the detected vehicle running speed, according to a predetermined shift control pattern.

公开(公告)号：US09732691B2

公开(公告)日：2017-08-15

申请号：US14762501

申请日：2013-01-29

申请人： Shuntaro Okazaki ,  Norihisa Nakagawa ,  Yuji Yamaguchi

发明人： Shuntaro Okazaki ,  Norihisa Nakagawa ,  Yuji Yamaguchi

IPC分类号： F01N3/00 ,  F01N3/10 ,  F02D41/14 ,  F01N3/20 ,  F02D41/02 ,  F01N13/00

CPC分类号： F02D41/1454 ,  F01N3/20 ,  F01N13/009 ,  F01N13/0093 ,  F01N2430/06 ,  F01N2560/025 ,  F01N2560/14 ,  F01N2900/1624 ,  F02D41/0295 ,  F02D41/1439

摘要： A control device for an internal combustion engine includes: an upstream catalyst; a downstream catalyst that is provided further downstream than the upstream catalyst in the exhaust flow direction; a downstream air-fuel ratio detection device that is provided between these catalysts; a storage amount estimation device that estimates the oxygen storage amount of the downstream catalyst; and an inflow air-fuel ratio control device that controls the air-fuel ratio of the exhaust gas flowing into the upstream catalyst such that the air-fuel ratio of the exhaust gas reaches a target air-fuel ratio.

公开(公告)号：US09593635B2

公开(公告)日：2017-03-14

申请号：US14763653

申请日：2013-01-29

申请人： Norihisa Nakagawa ,  Shuntaro Okazaki ,  Yuji Yamaguchi

发明人： Norihisa Nakagawa ,  Shuntaro Okazaki ,  Yuji Yamaguchi

IPC分类号： F01N3/00 ,  F02D41/14 ,  F02D41/02

CPC分类号： F02D41/1475 ,  F02D41/0295 ,  F02D41/1439 ,  F02D41/1477

摘要： A control device for an internal combustion engine, equipped with: an exhaust purification catalyst capable of storing oxygen; a downstream-side air-fuel ratio sensor arranged downstream in the direction of flow of exhaust from the exhaust purification catalyst; and an air-fuel ratio control device that controls the air-fuel ratio such that air-fuel ratio of the exhaust flowing into the exhaust purification catalyst reaches a target air-fuel ratio. The control device changes the target air-fuel ratio to a lean air-fuel ratio setting when the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a rich air-fuel ratio, and then changes the target air-fuel ratio to a slightly lean air-fuel ratio setting before the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a lean air-fuel ratio, and then changes the target air-fuel ratio to a rich air-fuel ratio setting when the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a lean air-fuel ratio, and then changes the target air-fuel ratio to a slightly rich air-fuel ratio setting before the exhaust air-fuel ratio detected by the downstream-side air-fuel ratio sensor reaches a rich air-fuel ratio.

摘要翻译： 一种用于内燃机的控制装置，配备有能够存储氧气的排气净化催化剂; 下游侧空燃比传感器，其布置在排气净化催化剂的排气流动方向的下游; 以及空燃比控制装置，其使流入所述排气净化催化剂的排气的空燃比达到目标空燃比来控制所述空燃比。 当由下游侧空燃比传感器检测到的排气空燃比达到浓空燃比时，控制装置将目标空燃比变更为稀空燃比设定，然后将目标空气 - 燃料比与由下游侧空燃比传感器检测到的排气空燃比之前的略微偏空燃比设定达到稀空燃比，然后将目标空燃比变为浓 由下游侧空燃比传感器检测到的排气空燃比达到稀空燃比时的空燃比设定，然后将目标空燃比设定为稍高的空燃比设定 由下游侧空燃比传感器检测到的排气空燃比达到浓空燃比。

公开(公告)号：US08146353B2

公开(公告)日：2012-04-03

申请号：US12153522

申请日：2008-05-20

申请人： Taiga Hagimoto ,  Norihisa Nakagawa

发明人： Taiga Hagimoto ,  Norihisa Nakagawa

IPC分类号： F01N3/24

CPC分类号： F01N3/2053 ,  F01N3/101 ,  F01N3/2093 ,  F01N9/00 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/011 ,  F01N13/1816 ,  F01N2240/36 ,  F01N2410/00 ,  F01N2560/025 ,  Y02A50/2324 ,  Y02T10/22

摘要： An exhaust purification device includes a front catalyst arranged in an exhaust system of the internal combustion engine that is longitudinally mounted in a vehicle, a rear catalyst arranged in the exhaust system downstream of the front catalyst, and a bypass pipe that communicates with the exhaust passage of the exhaust system upstream of the front catalyst, communicates with the exhaust passage between the front catalyst and the rear catalyst, and is arranged at a position that is spaced apart in a direction perpendicular to the vibration direction of the exhaust system.

摘要翻译： 排气净化装置具备：内燃机的纵向安装在车辆的排气系统中的前部催化剂，配置在前部催化剂下游侧的排气系统中的后部催化剂和与排气通路连通的旁通管 在前催化剂上游的排气系统与前催化剂和后催化剂之间的排气通道连通，并且布置在与排气系统的振动方向垂直的方向上间隔开的位置。

公开(公告)号：US20100108046A1

公开(公告)日：2010-05-06

申请号：US12595767

申请日：2008-04-11

申请人： Norihisa Nakagawa ,  Takahiko Fujiwara ,  Taiga Hagimoto ,  Junichi Kako ,  Naoto Kato ,  Shuntaro Okazaki

发明人： Norihisa Nakagawa ,  Takahiko Fujiwara ,  Taiga Hagimoto ,  Junichi Kako ,  Naoto Kato ,  Shuntaro Okazaki

IPC分类号： F02D41/00

CPC分类号： F02D41/1455 ,  F02D41/1441 ,  F02D41/1456 ,  F02D41/2461

摘要： An air-fuel ratio control device includes an air-fuel ratio sensor provided upstream from a three-way catalyst, and an oxygen sensor provided downstream from the three-way catalyst. The air-fuel ratio control device controls the fuel supply amount based on the output from the air-fuel ratio sensor, and compensates for errors in the air-fuel ratio sensor by correcting the fuel supply amount based on the output from the oxygen sensor. The fuel supply correction amount is calculated based on an integral term that integrates the deviation between the output from the downstream air-fuel ratio sensor and the target air-fuel ratio. When a fuel supply adjustment control is executed, the value of the integral term in the sub-feedback control is not updated for a predetermined period after the fuel supply adjustment control ends. The actual air-fuel ratio is thus brought to the target air-fuel ratio in an appropriate manner.

摘要翻译： 空燃比控制装置包括设置在三元催化剂上游的空燃比传感器和设置在三元催化剂下游的氧传感器。 空燃比控制装置基于空燃比传感器的输出来控制燃料供给量，并且通过基于氧传感器的输出校正燃料供给量来补偿空燃比传感器的误差。 基于将来自下游空燃比传感器的输出与目标空燃比的偏差进行积分的积分项来计算燃料供给修正量。 当执行燃料供给调节控制时，在燃料供给调节控制结束之后的预定时间段内，子反馈控制中的积分项的值不被更新。 因此，实际的空燃比以适当的方式达到目标空燃比。

公开(公告)号：US20100024790A1

公开(公告)日：2010-02-04

申请号：US12443782

申请日：2007-08-13

申请人： Takahiko Fujiwara ,  Norihisa Nakagawa ,  Taiga Hagimoto ,  Junichi Kako ,  Naoto Kato ,  Shuntaro Okazaki ,  Koji Ide

发明人： Takahiko Fujiwara ,  Norihisa Nakagawa ,  Taiga Hagimoto ,  Junichi Kako ,  Naoto Kato ,  Shuntaro Okazaki ,  Koji Ide

IPC分类号： F02D41/00

CPC分类号： F02D41/2454 ,  F02D13/023 ,  F02D41/1454 ,  F02D41/2438 ,  F02D41/2474 ,  Y02T10/18

摘要： An air-fuel ratio control system of a multi-cylinder internal combustion engine provided with a throttle valve and opening characteristic control means, which system performs feedback control of an air-fuel ratio based on an output of a sensor detecting an air-fuel ratio of exhaust gas and is capable of performing more accurate air-fuel ratio control, is provided. In the feedback control, the relationship of the output of the sensor and a feedback value is corrected based on a feedback learning correction value learned and determined based on the output of the sensor during the feedback control, and, when newly learning the feedback learning correction value, the intake air amount is controlled by only the throttle valve.

摘要翻译： 具有节气门和开启特性控制装置的多缸内燃机的空燃比控制系统，其基于检测空燃比的传感器的输出进行空燃比的反馈控制 的排气，能够进行更精确的空燃比控制。 在反馈控制中，基于在反馈控制期间基于传感器的输出而学习和确定的反馈学习校正值来校正传感器的输出与反馈值的关系，并且当新学习反馈学习校正时 值，进气量仅由节流阀控制。

公开(公告)号：US20080289322A1

公开(公告)日：2008-11-27

申请号：US12153522

申请日：2008-05-20

申请人： Taiga Hagimoto ,  Norihisa Nakagawa

发明人： Taiga Hagimoto ,  Norihisa Nakagawa

IPC分类号： F01N3/10

CPC分类号： F01N3/2053 ,  F01N3/101 ,  F01N3/2093 ,  F01N9/00 ,  F01N13/009 ,  F01N13/0093 ,  F01N13/011 ,  F01N13/1816 ,  F01N2240/36 ,  F01N2410/00 ,  F01N2560/025 ,  Y02A50/2324 ,  Y02T10/22

摘要： An exhaust purification device includes a front catalyst arranged in an exhaust system of the internal combustion engine that is longitudinally mounted in a vehicle, a rear catalyst arranged in the exhaust system downstream of the front catalyst, and a bypass pipe that communicates with the exhaust passage of the exhaust system upstream of the front catalyst, communicates with the exhaust passage between the front catalyst and the rear catalyst, and is arranged at a position that is spaced apart in a direction perpendicular to the vibration direction of the exhaust system.

摘要翻译： 排气净化装置具备：内燃机的纵向安装在车辆的排气系统中的前部催化剂，配置在前部催化剂下游侧的排气系统中的后部催化剂和与排气通路连通的旁通管 在前催化剂上游的排气系统与前催化剂和后催化剂之间的排气通道连通，并且布置在与排气系统的振动方向垂直的方向上间隔开的位置。

公开(公告)号：US07159388B2

公开(公告)日：2007-01-09

申请号：US10881177

申请日：2004-07-01

申请人： Norihisa Nakagawa ,  Takahiko Fujiwara

发明人： Norihisa Nakagawa ,  Takahiko Fujiwara

IPC分类号： F01N3/00 ,  F01N3/10

CPC分类号： F01N3/101 ,  F01N3/28 ,  F01N13/009 ,  F01N13/0093 ,  F01N2570/10 ,  F01N2570/12 ,  F01N2570/14 ,  F02D41/1441 ,  F02D41/1456 ,  F02D41/2461 ,  Y02T10/22

摘要： A catalyst is positioned in an exhaust path of an internal-combustion engine. A main air-fuel ratio sensor and sub-oxygen sensor are respectively positioned upstream and downstream of the catalyst. A main feedback operation is performed so that the output of the main air-fuel ratio sensor is fed back and reflected in the fuel injection quantity until the control A/F prevailing upstream of the catalyst coincides with the target A/F. A sub-feedback operation is performed so that the output of the sub-oxygen sensor is fed back and reflected in the fuel injection quantity until the air-fuel ratio of an exhaust gas flowing out of the catalyst agrees with a theoretical air-fuel ratio. Since a catalyst window varies in accordance with the intake air quantity, the fuel injection quantity is corrected so that the larger the intake air quantity becomes, the richer the control A/F is.

摘要翻译： 催化剂位于内燃机的排气路径中。 主要的空燃比传感器和次氧传感器分别位于催化剂的上游和下游。 执行主反馈操作，使得主空燃比传感器的输出被反馈并反映在燃料喷射量中，直到催化剂上游的控制A / F与目标A / F一致。 执行副反馈操作，使得副氧传感器的输出反馈并以燃料喷射量反映，直到从催化剂流出的排气的空燃比与理论空燃比一致 。 由于催化剂窗口根据进气量而变化，因此校正燃料喷射量，使得进气量越大，控制装置A / F越浓。

公开(公告)号：US20060242948A1

公开(公告)日：2006-11-02

申请号：US11359461

申请日：2006-02-23

申请人： Norihisa Nakagawa

发明人： Norihisa Nakagawa

IPC分类号： F01N3/00

CPC分类号： F02D41/1482 ,  F01N11/007 ,  F01N2560/02 ,  F01N2900/0422 ,  F02D41/2448 ,  F02D41/2454 ,  F02D2041/1409 ,  Y02T10/47

摘要： A first integration value is obtained by performing time integration on a feedback control signal during the time interval between the instant at which the deviation between a reference signal and the output signal of an oxygen sensor reverses from a negative value to a positive value and the instant at which the deviation reverses back to the negative value. A second integration value is obtained by performing time integration on a feedback control signal during the time interval between the instant at which the deviation between a reference signal and the output signal of the oxygen sensor reverses from a positive value to a negative value and the instant at which the deviation reverses back to the positive value. When the deviation between the absolute values of the first and second integration values is smaller than a predetermined threshold value, it is concluded that a feedback learning value is completely learned.

摘要翻译： 通过在参考信号和氧传感器的输出信号之间的偏差与负值反转到正值之间的时间间隔内的时间间隔内对反馈控制信号执行时间积分获得第一积分值， 其中偏差反转回负值。 通过在参考信号和氧传感器的输出信号之间的偏差与正值反转到负值之间的时间间隔内的时间间隔内对反馈控制信号执行时间积分获得第二积分值， 其中偏差反转回正值。 当第一和第二积分值的绝对值之间的偏差小于预定阈值时，得出结论，反馈学习值被完全学习。