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公开(公告)号：US20230399971A1
公开(公告)日：2023-12-14
申请号：US18329708
申请日：2023-06-06
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Toru YAEO , Yoshifumi MATSUDA , Masashi HAKARIYA , Atsushi MORIKAWA , Ikuo HODA , Noriyasu ADACHI , Masanori HAYASHI , Kenji IGAWA
CPC classification number: F01N11/005 , F02D41/0235
Abstract: A controller for an internal combustion engine is configured to execute a determination process and an anomaly diagnosing process. The determination process is a process of determining that a deviation between a first change amount and a second change amount during a fuel cutoff operation is less than or equal to a threshold. The anomaly diagnosing process is a process of determining that an exhaust purification device is in a detached state when it is determined in the determination process that the deviation is less than or equal to the threshold. The first change amount and the second change amount are change amounts per unit time of the temperature of exhaust gas on the upstream side and the downstream side of the exhaust purification device, respectively.
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公开(公告)号：US20220403767A1
公开(公告)日：2022-12-22
申请号：US17749147
申请日：2022-05-20
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Sohichi IMAI , Yuya YOSHIKAWA , Kazuhiro HASEGAWA , Yoshifumi MATSUDA , Masanao IDOGAWA , Takahiro UCHIDA , Yuki YABUSHITA
Abstract: A control device for an internal combustion engine including an upstream cleaning device and a downstream cleaning device that are provided in an exhaust gas passage and a temperature sensor that detects a temperature of exhaust gas between the upstream cleaning device and the downstream cleaning device is provided. The control device includes a first temperature estimating unit configured to estimate a temperature of the downstream cleaning device from the temperature of exhaust gas detected by the temperature sensor and a second temperature estimating unit configured to estimate a temperature of the downstream cleaning device without using the temperature of exhaust gas detected by the temperature sensor. An abnormality determining process for the upstream cleaning device is performed when at least the temperature of the downstream cleaning device estimated by the second temperature estimating unit is equal to or greater than a predetermined threshold value.
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Patent Agency Ranking
公开(公告)号：US20230399965A1
公开(公告)日：2023-12-14
申请号：US18329663
申请日：2023-06-06
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Toru YAEO , Yoshifumi MATSUDA , Masashi HAKARIYA , Atsushi MORIKAWA , Ikuo HODA , Noriyasu ADACHI , Masanori HAYASHI , Kenji IGAWA
Abstract: A controller for an internal combustion engine is configured to execute a regeneration process of burning and removing particulate matter accumulated in an exhaust purification device, a determination process of determining that a deviation between a first change amount and a second change amount is less than or equal to a threshold, the first change amount and the second change amount being change amounts per unit time of the temperature of exhaust gas on the upstream side and the downstream side of the exhaust purification device, respectively, and an anomaly diagnosing process that determines that the exhaust purification device is in a detached state when the determination process determines that the deviation is less than or equal to the threshold. The controller is configured to not execute the determination process during a period from the end of the regeneration process to when a post-regeneration execution condition is met.
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公开(公告)号：US20160076474A1
公开(公告)日：2016-03-17
申请号：US14785030
申请日：2014-03-28
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Yuya YOSHIKAWA , Tokiji ITO , Isao NAKAJIMA , Hiroaki TSUJI , Toshihiro KATO , Yoshihisa ODA , Masashi HAKARIYA , Masahide OKADA , Yoshifumi MATSUDA
IPC: F02D41/14
CPC classification number: F02D41/1454 , F02D41/0085 , F02D41/1441 , F02D41/1456 , F02D41/1495 , F02D41/2454 , F02D2041/1422
Abstract: An air-fuel ratio control apparatus for an internal combustion engine is provided. A controller is programmed to perform correction amount guard control allowing adjustment of a correction amount by setting a limit on the correction amount when an appearance frequency of a state where an output value from a downstream sensor is leaner than a predetermined value is equal to or higher than a predetermined value. When a state where the output value from the downstream sensor is leaner than the predetermined value lasts for a duration equal to or longer than a predetermined time, an incorporation speed at which, during learning control, the correction amount for sub feedback control is incorporated into a learning value is set to a larger value that when the duration is shorter than the predetermined time, and performance of the correction amount guard control is suppressed until the learning control is completed.
Abstract translation: 提供一种用于内燃机的空燃比控制装置。 控制器被编程为执行校正量保护控制，允许当来自下游传感器的输出值比预定值更稀的状态的出现频率等于或更高时，通过设置校正量的限制来调整校正量 超过预定值。 当来自下游传感器的输出值比预定值更精细的状态持续等于或长于预定时间的持续时间时，在学习控制期间将用于副反馈控制的校正量并入的并入速度 将学习值设定为较大的值，即当持续时间短于预定时间时，校正量保护控制的执行被抑制直到学习控制完成。
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公开(公告)号：US20240077011A1
公开(公告)日：2024-03-07
申请号：US18451947
申请日：2023-08-18
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Kazuya MIYAJI , Teruhiko MIYAKE , Tomoyuki TSUJI , Yusuke JOH , Yoshifumi MATSUDA
IPC: F01N11/00
CPC classification number: F01N11/002 , F01N2560/06 , F01N2900/1404
Abstract: A removal determination device that accurately determines a removal of an exhaust gas purification device from an exhaust pipe. The removal determination device comprises: an input temperature sensor detecting a temperature at an upstream side of casing; an output temperature sensor detecting a temperature at a downstream side of the casing; an engine stop time collector measuring a time period from an inactivation of an engine to a startup of the engine; and a determiner determining a presence of the exhaust gas purifying device based on the input temperature and the output temperature, in a case that the time period is equal to or longer than a predetermined time.
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6.发明公开公开(公告)号：US20240068422A1
公开(公告)日：2024-02-29
申请号：US18356376
申请日：2023-07-21
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Yusuke JOH , Tomoyuki TSUJI , Yuki IKEJIRI , Masashi HAKARIYA , Makoto YAMAZAKI , Yoshikazu ASAMI , Hisao KIYONO , Tatsuaki ARISAWA , Yoshifumi MATSUDA , Tsubasa SUGANO
CPC classification number: F02D41/22 , F02D41/0255 , F02D2200/0804
Abstract: An upstream integrated value is an integrated value of a difference obtained by subtracting an upstream gas temperature at a starting point in time of integration from the upstream gas temperature after starting of the internal combustion engine. A downstream integrated value is an integrated value of a difference obtained by subtracting a downstream gas temperature at the starting point in time of the integration from the downstream gas temperature after the starting of the internal combustion engine. An anomaly diagnosing process obtains an anomaly determination result indicating that the exhaust purification device is in a removed state when a deviation between the upstream integrated value and the downstream integrated value is smaller than a reference level. The determination threshold is higher than a dew point.
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公开(公告)号：US20230399970A1
公开(公告)日：2023-12-14
申请号：US18329624
申请日：2023-06-06
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Toru YAEO , Yoshifumi MATSUDA , Masashi HAKARIYA , Atsushi MORIKAWA , Ikuo HODA , Noriyasu ADACHI , Masanori HAYASHI , Kenji IGAWA
CPC classification number: F01N11/005 , F02D41/0235 , F02D2200/0802
Abstract: A controller for an internal combustion engine is configured to execute a determination process that determines that a deviation between a first change amount and a second change amount during a fuel cutoff operation is less than or equal to a threshold, and an anomaly diagnosing process that determines that an exhaust purification device is in a detached state when the determination process determines that the deviation is less than or equal to the threshold. The first change amount and the second change amount are change amounts per unit time of the temperature of exhaust gas on the upstream side and the downstream side of the exhaust purification device, respectively. The controller is configured to interrupt the determination process when the upstream-side temperature increases within a determination period.
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