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公开(公告)号：US12122353B2
公开(公告)日：2024-10-22
申请号：US17657868
申请日：2022-04-04
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shigemasa Hirooka , Koichi Kitaura , Yoshio Yamashita , Shingo Korenaga , Katsuhiro Ito , Hikaru Shiozawa
CPC classification number: B60W20/13 , F01N3/2013 , B60W2510/068 , B60W2510/244
Abstract: A control device starts supply of electric power to a catalyst device when a state of charge of a main battery decreases to a value which is equal to or less than an optimal power-supply state of charge set based on a travel load while a vehicle is traveling in an EV travel mode. The control device corrects input electric power of the catalyst device to a value less than the value at the time of starting of supply of electric power when the travel load decreases after the supply of electric power has been started.
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公开(公告)号：US11492941B1
公开(公告)日：2022-11-08
申请号：US17656096
申请日：2022-03-23
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shigemasa Hirooka , Koichi Kitaura , Yoshio Yamashita , Shingo Korenaga , Katsuhiro Ito , Hikaru Shiozawa
Abstract: A controller is applied to an internal combustion engine in which an electrically heated catalyst that is heated when supplied with electric power is installed in an exhaust passage. The controller is configured to perform a preheating process of warming up a first exhaust catalyst by supplying electric power to the electrically heated catalyst through control over a power supply before a start of the internal combustion engine. The controller is configured to, when an insulation resistance of the electrically heated catalyst at a start of the preheating process is lower than a threshold, perform the preheating process while decreasing a voltage supplied to the electrically heated catalyst.
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公开(公告)号：US10385763B2
公开(公告)日：2019-08-20
申请号：US15902387
申请日：2018-02-22
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Koichi Kitaura
Abstract: An exhaust system includes an electronic control unit that is configured to control a turbo bypass valve to be in a fully closed state and control an opening degree of a wastegate valve to a first predetermined opening degree during execution of fuel cut control, and maintain the turbo bypass valve in the fully closed state and control an opening degree of the wastegate valve to a second predetermined opening degree when a boost request is not made for the internal combustion engine at the end of the fuel cut control. An area of inflow of bypass gas on an upstream side end surface of the three-way catalyst when the opening degree of the wastegate valve is controlled to the first predetermined opening degree is in a different position from when the opening degree of the wastegate valve is controlled to the second predetermined opening degree.
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公开(公告)号：US20180245507A1
公开(公告)日：2018-08-30
申请号：US15902387
申请日：2018-02-22
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Koichi Kitaura
CPC classification number: F02B37/183 , F01N3/101 , F01N3/20 , F01N2340/06 , F02B37/025 , F02B37/225 , F05D2220/40 , Y02T10/144 , Y02T10/22
Abstract: An exhaust system includes an electronic control unit that is configured to control a turbo bypass valve to be in a fully closed state and control an opening degree of a wastegate valve to a first predetermined opening degree during execution of fuel cut control, and maintain the turbo bypass valve in the fully closed state and control an opening degree of the wastegate valve to a second predetermined opening degree when a boost request is not made for the internal combustion engine at the end of the fuel cut control. An area of inflow of bypass gas on an upstream side end surface of the three-way catalyst when the opening degree of the wastegate valve is controlled to the first predetermined opening degree is in a different position from when the opening degree of the wastegate valve is controlled to the second predetermined opening degree.
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公开(公告)号：US09732658B2
公开(公告)日：2017-08-15
申请号：US14496187
申请日：2014-09-25
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Koichi Kitaura , Hiroshi Miyamoto , Masahiro Kubo
IPC: F01N11/00 , F01N13/00 , F01N3/28 , F02B3/00 , F01N3/00 , G01M15/10 , F02D41/14 , F02D41/02 , F02D41/00 , F02D41/30 , F02M63/00 , F02D41/22
CPC classification number: F01N11/007 , F01N2550/02 , F01N2560/025 , F01N2560/14 , F01N2900/0416 , F01N2900/1624 , F02D41/1439 , F02D41/1454 , F02D41/1475 , F02D41/22 , F02D41/222 , F02D2200/0814 , F02D2200/0816 , Y02T10/40 , Y02T10/47
Abstract: An abnormality diagnosis system of an internal combustion engine which is provided with an exhaust purification catalyst 20 which can store oxygen is provided with a downstream side air-fuel ratio sensor 41 downstream of the catalyst and a catalyst abnormality diagnosis system which uses an output air-fuel ratio of the downstream side air-fuel ratio sensor when performing active air-fuel ratio control as the basis for diagnosing an exhaust purification catalyst for abnormality. The catalyst abnormality diagnosis system uses the amount of oxygen which is stored in or released from the exhaust purification catalyst in an air-fuel ratio reversal time period in active air-fuel ratio control as the basis to calculate the maximum storable oxygen amount of the exhaust purification catalyst and uses this as the basis to diagnose the exhaust purification catalyst for abnormality.
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Patent Agency Ranking
公开(公告)号：US20150086428A1
公开(公告)日：2015-03-26
申请号：US14496187
申请日：2014-09-25
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Koichi Kitaura , Hiroshi Miyamoto , Masahiro Kubo
CPC classification number: F01N11/007 , F01N2550/02 , F01N2560/025 , F01N2560/14 , F01N2900/0416 , F01N2900/1624 , F02D41/1439 , F02D41/1454 , F02D41/1475 , F02D41/22 , F02D41/222 , F02D2200/0814 , F02D2200/0816 , Y02T10/40 , Y02T10/47
Abstract: An abnormality diagnosis system of an internal combustion engine which is provided with an exhaust purification catalyst 20 which can store oxygen is provided with a downstream side air-fuel ratio sensor 41 downstream of the catalyst and a catalyst abnormality diagnosis system which uses an output air-fuel ratio of the downstream side air-fuel ratio sensor when performing active air-fuel ratio control as the basis for diagnosing an exhaust purification catalyst for abnormality. The catalyst abnormality diagnosis system uses the amount of oxygen which is stored in or released from the exhaust purification catalyst in an air-fuel ratio reversal time period in active air-fuel ratio control as the basis to calculate the maximum storable oxygen amount of the exhaust purification catalyst and uses this as the basis to diagnose the exhaust purification catalyst for abnormality.
Abstract translation: 具有能够存储氧的排气净化催化剂20的内燃机的异常诊断系统在催化剂下游设置有下游侧空燃比传感器41以及使用输出空气 - 燃料比的催化剂异常诊断系统， 作为用于诊断用于异常的排气净化催化剂的基础的主动空燃比控制时的下游侧空燃比传感器的燃料比。 催化剂异常诊断系统使用在主动空燃比控制中的空燃比反转时间段内存储或排出的排气净化催化剂的氧气的量作为计算排气的最大可储存氧量的基础 净化催化剂，并将其用作诊断异常排气净化催化剂的基础。
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公开(公告)号：US11795884B2
公开(公告)日：2023-10-24
申请号：US17897594
申请日：2022-08-29
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shigemasa Hirooka , Koichi Kitaura , Yoshio Yamashita , Shingo Korenaga , Katsuhiro Ito , Hikaru Shiozawa
CPC classification number: F02D41/0235 , F01N3/108 , F01N3/2026 , F02D41/3076
Abstract: A control device is applied to an internal combustion engine equipped with an electric heating catalyst system provided with an EHC. The control device executes a preheating process to warm up an exhaust gas reduction catalyst prior to a start of the internal combustion engine by supplying electric power to the EHC, when the control device determines that a temperature of the exhaust gas reduction catalyst is lower than an activation temperature. The control device executes a determination process for determining whether water is adhered to a catalyst carrier. The control device starts the internal combustion engine without executing the preheating process when the control device determines by the determination process that water is adhered to the catalyst carrier, even when the control device determines that the temperature of the exhaust gas reduction catalyst is lower than the activation temperature.
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公开(公告)号：US10830167B2
公开(公告)日：2020-11-10
申请号：US15982327
申请日：2018-05-17
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Koichi Kitaura , Yasuyuki Irisawa , Hirofumi Kubota , Takashi Tsunooka
IPC: F02D41/02 , F02B37/18 , F01N9/00 , F02D41/00 , F01N5/04 , F02D41/12 , F01N3/20 , F01N13/08 , F01N3/28 , F01N3/10
Abstract: The deterioration of an exhaust gas purification catalyst is suppressed as much as possible. An exhaust gas purification system for an internal combustion engine comprising: a throttle valve; a turbocharger; an exhaust gas purification catalyst; a bypass passage; a turbo bypass valve (TBV); and a controller. The controller is configured to carry out fuel cut processing and deterioration suppression control. In the deterioration suppression control, when a temperature of the exhaust gas purification catalyst is equal to or higher than a predetermined temperature in the course of the execution of the fuel cut processing, the degree of opening of the TBV becomes smaller, and the degree of opening of the throttle valve becomes larger, than when the temperature of the exhaust gas purification catalyst is lower than the predetermined temperature in the course of the execution of the fuel cut processing.
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公开(公告)号：US10724456B2
公开(公告)日：2020-07-28
申请号：US15985073
申请日：2018-05-21
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Koji Miwa , Koichi Kitaura , Takahiro Tsukagoshi , Kenji Inoshita , Kazuya Suzuki , Takeru Yoshida , Isao Chinzei , Kaoru Otsuka
Abstract: A vehicle includes an internal combustion engine including an exhaust passage, a catalyst provided in the exhaust passage, and an electronic control unit. When the engine stop condition is established, the electronic control unit stops fuel injection and increases a catalyst inflow oxygen amount that is an amount of oxygen flowing into the catalyst by a specified oxygen increase amount. The engine stop condition is a condition for stopping operation of the internal combustion engine. The specified oxygen increase amount is larger than an increased part of the catalyst inflow oxygen amount that is increased by the stop of the fuel injection.
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公开(公告)号：US20180340481A1
公开(公告)日：2018-11-29
申请号：US15985073
申请日：2018-05-21
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Koji Miwa , Koichi Kitaura , Takahiro Tsukagoshi , Kenji Inoshita , Kazuya Suzuki , Takeru Yoshida , Isao Chinzei , Kaoru Otsuka
Abstract: A vehicle includes an internal combustion engine including an exhaust passage, a catalyst provided in the exhaust passage, and an electronic control unit. When the engine stop condition is established, the electronic control unit stops fuel injection and increases a catalyst inflow oxygen amount that is an amount of oxygen flowing into the catalyst by a specified oxygen increase amount. The engine stop condition is a condition for stopping operation of the internal combustion engine. The specified oxygen increase amount is larger than an increased part of the catalyst inflow oxygen amount that is increased by the stop of the fuel injection.
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