公开(公告)号：US20150152769A1

公开(公告)日：2015-06-04

申请号：US14404340

申请日：2012-05-28

Applicant: Keiichiro Aoki ,  Koichi Kitaura ,  Go Hayashita

Inventor： Keiichiro Aoki ,  Koichi Kitaura ,  Go Hayashita

IPC: F01N11/00 ,  G01M15/10

CPC classification number: F01N11/007 ,  F01N2550/02 ,  F01N2560/025 ,  F02D41/0235 ,  F02D41/1441 ,  F02D41/1454 ,  F02D41/1456 ,  F02D2200/0816 ,  G01M15/104 ,  Y02T10/47

Abstract: A catalyst deterioration determination system for determining deterioration of an exhaust gas purification catalyst having a capability of storing oxygen determines deterioration of the exhaust gas purification catalyst on the basis of its oxygen storage capacity. The system includes an oxygen concentration sensor provided downstream of the catalyst and having characteristics by which as rich gas components in exhaust gas increase, the oxygen concentration sensor outputs a measurement value of the oxygen concentration corresponding to a richer air-fuel ratio. When determining deterioration, the system performs a rich shift mode in which the exhaust gas air-fuel ratio is shifted from a lean air-fuel ratio to a rich air-fuel ratio and a lean shift mode in which the exhaust gas air-fuel ratio is shifted from a rich air-fuel ratio to a lean air-fuel ratio by exhaust gas air-fuel ratio control means, based on the measurement value of the oxygen concentration sensor. The rate of change of the exhaust gas air-fuel ratio in at least the lean shift mode among the rich shift mode and the lean shift mode is limited to a predetermined rate of change or lower, and the rate of change of the exhaust gas air-fuel ratio in the rich shift mode is set higher than the rate of change of the exhaust gas air furl ratio in the lean shift mode.

Abstract translation: 用于确定具有存储氧气的废气净化催化剂的劣化的催化剂劣化确定系统基于其储氧能力来确定废气净化催化剂的劣化。 该系统包括设置在催化剂下游的氧浓度传感器，其特征在于，随着废气中富含气体成分的增加，氧浓度传感器输出对应于较浓空燃比的氧浓度的测量值。 当确定劣化时，系统执行富排气模式，其中废气空燃比从稀空燃比转变为浓空气燃料比和贫排气模式，其中排气空燃比 基于氧浓度传感器的测量值，通过废气空燃比控制装置从浓空燃比转变为稀空燃比。 在富变换模式和稀班模式之间的至少贫偏模式中的排气空燃比的变化率被限制在预定变化率或更低的变化率，并且排气空气的变化率 富排气模式中的燃料比设定为高于贫排气模式中的废气空气流量比的变化率。

公开(公告)号：US20150128574A1

公开(公告)日：2015-05-14

申请号：US14400870

申请日：2012-05-23

Applicant: Go Hayashita ,  Keiichiro Aoki

Inventor： Go Hayashita ,  Keiichiro Aoki

IPC: F01N3/20 ,  F02D35/00

CPC classification number: F01N3/2006 ,  F02D35/0007 ,  F02D35/0015 ,  F02D41/062 ,  F02D41/1441 ,  F02D41/1454 ,  F02D41/1495

Abstract: This invention relates to an air-fuel ratio control device of an internal combustion engine, and an object of the invention is to provide an air-fuel ratio control device of an internal combustion engine that is capable of suppressing a deterioration in the controllability of air-fuel ratio feedback control after restarting an engine. FIG. 6 illustrates an elapsed time after engine startup, and output values of a front A/F sensor 16 and a rear A/F sensor 18. As shown in FIG. 6, the output values of the front A/F sensor 16 and rear A/F sensor 18 become equal from a time T3 onwards. Hence, by switching to normal air-fuel ratio feedback control at the time T3, highly accurate air-fuel ratio feedback control that is in accordance with the actual situation is enabled.

Abstract translation: 本发明涉及一种内燃机的空燃比控制装置，其目的在于提供能够抑制空气的控制性劣化的内燃机的空燃比控制装置 - 重新启动发动机后的燃油比反馈控制。 图。 图6示出了发动机启动后的经过时间，以及前A / F传感器16和后A / F传感器18的输出值。 如图6所示，前A / F传感器16和后A / F传感器18的输出值从时间T3开始变得相等。 因此，通过在时间T3切换到通常的空燃比反馈控制，能够实现与实际情况相应的高精度的空燃比反馈控制。

公开(公告)号：US20140005882A1

公开(公告)日：2014-01-02

申请号：US14006405

申请日：2011-05-24

Applicant: Keiichiro Aoki ,  Takanori Sasaki ,  Go Hayashita

Inventor： Keiichiro Aoki ,  Takanori Sasaki ,  Go Hayashita

IPC: F02D41/14

CPC classification number: F02D41/1438 ,  F02D41/062 ,  F02D41/1441 ,  F02D41/1456 ,  F02D41/2474

Abstract: A sensor characteristic correction device is configured to detect a characteristic of a first sensor arranged upstream of a catalyst 6 in an exhaust passage 4 of an internal combustion engine 2, and a characteristic of a second sensor that is an air-fuel sensor 12 arranged downstream of the catalyst 6, to calculate a first air-fuel ratio based on the characteristic of the first sensor, and calculates a second air-fuel ratio based on the characteristic of the second sensor, to detect, when the catalyst 6 is in an inactive state after start-up of the internal combustion engine 2, a difference between the first characteristic and the second characteristic or a difference between the first air-fuel ratio and the second air-fuel ratio, and to correct the responsiveness of the first or the second sensor in accordance with the difference.

Abstract translation: 传感器特性校正装置被配置为检测布置在内燃机2的排气通道4中的催化剂6上游的第一传感器的特性，以及作为布置在下游的空气 - 燃料传感器12的第二传感器的特性 ，以基于第一传感器的特性来计算第一空燃比，并且基于第二传感器的特性计算第二空燃比，以在催化剂6处于非活动状态时检测 内燃机2启动后的状态，第一特性和第二特性之间的差异，或第一空燃比与第二空燃比之间的差异，并且校正第一或第二空燃比的响应性 第二传感器根据差异。