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公开(公告)号：US11532945B2
公开(公告)日：2022-12-20
申请号：US17083878
申请日：2020-10-29
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shigemasa Hirooka , Shingo Korenaga
Abstract: A control device for a vehicle is provided with a catalyst warmup control part supplying electric power to a conductive base to warm up a catalyst device if the temperature of the conductive base is less than a predetermined temperature and the state of charge of the battery is less than a second state of charge larger than a first state of charge when the state of charge of the battery is equal to or greater than the predetermined first state of charge and a driving mode of the vehicle is set to an EV mode in which at least the output of the rotary electric machine is controlled to make the vehicle run. The catalyst warmup control part sets the second state of charge so that the second state of charge becomes larger in the case where the resistance value of the conductive base is large compared to when it is small.
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公开(公告)号：US11293326B2
公开(公告)日：2022-04-05
申请号：US17118018
申请日：2020-12-10
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shigemasa Hirooka , Shingo Korenaga
Abstract: An exhaust gas purifying device for an internal combustion engine includes: an electrically heated catalyst (EHC) including an insulating member; an insulation resistance detector; and a processor. The processor is configured to: acquire an insulation resistance value of the insulating member using the insulation resistance detector each time a trip of the vehicle starts; and execute diagnostic processing to diagnose the state of the EHC when the acquired insulation resistance value is equal to or less than a reference value. In the diagnostic processing, the processor is configured to determine whether or not there is an insulation abnormality of the EHC, based on an index value indicating the degree of decrease in an insulation resistance value of the insulating member of the current trip with respect to an insulation resistance value of the insulating member of one or more past trips including the last trip.
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公开(公告)号：US10895187B2
公开(公告)日：2021-01-19
申请号：US16656695
申请日：2019-10-18
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shigemasa Hirooka
Abstract: An exhaust gas purification apparatus for an internal combustion engine according to the present disclosure obtains an electric resistance value of the electrically heated catalyst after the lapse of a predetermined period of time which is a period of time required for condensed water adhered to the electrically heated catalyst to finish evaporating from the start of energization of the electrically heated catalyst, and calculates a heat energy shortage amount which is an amount of heat energy insufficient for raising the temperature of the electrically heated catalyst to a predetermined temperature or above, based on a difference between the electric resistance value thus obtained and a predetermined reference resistance value. Then, the exhaust gas purification apparatus supplies to the electrically heated catalyst an amount of energy required to compensate for the heat energy shortage amount.
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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：US10934920B2
公开(公告)日：2021-03-02
申请号：US16289663
申请日：2019-03-01
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shigemasa Hirooka
Abstract: Disclosed is an exhaust purification system for an internal combustion engine applied to a hybrid vehicle that performs EV travel after system power is turned on. The exhaust purification system includes: an exhaust purification catalyst; a heating element configured to generate heat with reception of power to heat the exhaust purification catalyst; a battery configured to supply the power to a motor and the heating element; a sensing unit configured to sense riding of an occupant in the hybrid vehicle; and a controller configured to execute first control to control the supply of the power from the battery to the heating element so that the power of electric energy of a prescribed ratio among activation electric energy is supplied to the heating element when the riding of the occupant is sensed by the sensing unit and a storage amount of the battery is larger than a second storage amount.
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Patent Agency Ranking
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：US11306640B2
公开(公告)日：2022-04-19
申请号：US16744180
申请日：2020-01-16
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shigemasa Hirooka , Tsuyoshi Obuchi , Shingo Korenaga
Abstract: The electrically heated catalyst to which the present disclosure is applied is provided in a hybrid vehicle capable of switching its running mode between EV mode and HC mode and supplied with electrical energy before the internal combustion engine is started. An abnormality detection apparatus calculates an electrical energy parameter relating to the integrated value of electrical power actually supplied to the electrically heated catalyst (actually supplied electrical power) over a specific period of time from the time when supply of electrical power to the electrically heated catalyst is started and detects an abnormality of the electrically heated catalyst by comparing the electrical energy parameter with a threshold. The threshold is set according to the rate of decrease of the charge level of a battery (charge level decrease rate) during a period in which electrical power is supplied to the electrically heated catalyst.
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公开(公告)号：US11300032B2
公开(公告)日：2022-04-12
申请号：US16744184
申请日：2020-01-16
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Tsuyoshi Obuchi , Shigemasa Hirooka , Shingo Korenaga
Abstract: An abnormality detection apparatus calculates an actually supplied electrical energy defined as the integrated value of electrical power actually supplied to the electrically heated catalyst over a specific period from the time when the supply of electrical power to the electrically heated catalyst is started and a target electrical energy in the specific period, and further calculates, from these integrated values, an accomplishment parameter relating to the ratio of the actually supplied electrical energy to the target electrical energy. The abnormality detection apparatus detects an abnormality of the electrically heated catalyst by comparing the accomplishment parameter with a specific threshold. The abnormality detection apparatus is configured to set the specific threshold according to the temperature of the electrically heated catalyst at the time when the supply of electrical power is started.
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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：US11199145B2
公开(公告)日：2021-12-14
申请号：US17101111
申请日：2020-11-23
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shigemasa Hirooka , Shingo Korenaga
Abstract: A control device comprises a catalyst warmup control part configured to supply electric power to a conductive base to warm up a catalyst device. The catalyst warmup control part is provided with a first estimating part configured to estimate a temperature of the conductive base based on an engine operating state, a second estimating part configured to estimate a temperature of the conductive base based on a resistance value of the conductive base detected when supplying current to the conductive base, and an electric power control part configured to control an amount of electric power supplied to the conductive base when warming up the catalyst device based on a result of comparison of magnitudes of a first estimated temperature of the conductive base estimated by the first estimating part and a second estimated temperature of the conductive base estimated by the second estimating part.
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