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1.发明授权公开(公告)号：US11828243B2
公开(公告)日：2023-11-28
申请号：US18110196
申请日：2023-02-15
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Keiichiro Aoki
CPC classification number: F02D41/1454 , F01N3/0864 , F01N11/005 , F01N11/007 , F01N2430/02 , F01N2430/06 , F01N2430/08 , F01N2430/085 , F01N2560/025 , F01N2900/0408 , F01N2900/0411 , F01N2900/0416 , F01N2900/1624 , F02D41/401 , F02D41/405 , F02D2200/0814 , F02D2200/0816
Abstract: An exhaust gas control apparatus for an internal combustion engine includes: a catalyst disposed in an exhaust passage of the engine and configured to be able to occlude oxygen; an air-fuel ratio sensor that detects an air-fuel ratio of an out-flow exhaust gas; and an air-fuel ratio control device that controls an air-fuel ratio of an in-flow exhaust gas to a target air-fuel ratio. The device executes air-fuel ratio reduction control in which the target air-fuel ratio is set to a rich setting air-fuel ratio, and corrects a parameter related to the air-fuel ratio reduction control such that an amount of a reducing gas supplied to the catalyst is decreased when a minimum air-fuel ratio obtained when the detected air-fuel ratio is varied to a rich side is richer than the rich setting air-fuel ratio or an average value of detected air-fuel ratios of the in-flow exhaust gas.
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公开(公告)号：US11078858B2
公开(公告)日：2021-08-03
申请号：US16273160
申请日：2019-02-12
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Keiichiro Aoki , Kazuki Takahashi
Abstract: A control apparatus for an internal combustion engine includes an exhaust gas sensor that has a sensor element and a heater for electrically heating the sensor element, a sensor circuit that detects the electric current generated by the exhaust gas sensor, a controller configured to: carry out starting processing to start the internal combustion engine, learn a value of the output of the sensor circuit when the starting processing is carried out by the controller, and control a temperature of the sensor element by using the heater, and controls the temperature of the sensor element to less than the predetermined temperature until the learning of the output value of the sensor circuit by the controller is completed after the starting processing is carried out by the controller.
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公开(公告)号：US10808586B2
公开(公告)日：2020-10-20
申请号：US16210012
申请日：2018-12-05
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Hiroshi Kobayashi , Toshihiro Mori , Daichi Imai , Keiichiro Aoki
Abstract: Rich spike is carried out in an efficient manner. In an exhaust gas purification apparatus for an internal combustion engine which performs lean burn operation, the apparatus includes an NOx storage reduction catalyst, a controller to carry out rich spike, to calculate a storage amount of NOx, to calculate a storage amount of nitrates, and calculate a nitrate ratio, wherein the controller controls a timing at which the rich spike is carried out, based on the nitrate ratio.
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公开(公告)号：US10712323B2
公开(公告)日：2020-07-14
申请号：US15796219
申请日：2017-10-27
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Keiichiro Aoki , Keigo Mizutani , Kazuhiro Wakao , Kazuhisa Matsuda
IPC: G01N27/407 , G01N33/00 , F02D41/14
Abstract: An electronic central unit is configured to control a voltage application device to execute applied voltage sweep and obtain an output current that flows between a first electrode and a second electrode of an electrochemical cell. The electronic control unit is configured to detect either one of presence or absence of sulfur oxides in a specified concentration or higher in exhaust gas and a concentration of sulfur oxides in the exhaust gas based on the output current. The electronic control unit is configured to execute one of a specified determination and a specified detection based on a specified parameter. Accordingly, it is possible to accurately determine the presence or the absence of sulfur oxides in the specified concentration or higher that are contained in exhaust gas or detect the concentration of sulfur oxides in the exhaust gas.
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公开(公告)号：US10677750B2
公开(公告)日：2020-06-09
申请号：US15892851
申请日：2018-02-09
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Keiichiro Aoki
IPC: G01N27/406 , G01N27/12 , G01N27/407 , G01N27/41 , G01M15/10 , G01N33/00
Abstract: A gas detection device includes a temperature control part configured to detect an element impedance by applying a high frequency voltage to an element part, and to control an electric power to be supplied to a heating part based on the detected element impedance. The temperature control part is configured, when the applied voltage control for SOx detection is being performed and at least a voltage decrease sweep is being performed, to perform a second element temperature control to stop detecting the element impedance to set the electric power to be supplied to the heating part to a predetermined electric power.
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Patent Agency Ranking
公开(公告)号：US10677749B2
公开(公告)日：2020-06-09
申请号：US15887189
申请日：2018-02-02
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Keiichiro Aoki
IPC: G01N27/406 , G01N27/407 , F02D41/14 , F02D41/28 , F02D41/20 , F01N3/10 , F01N3/021 , F01N13/00
Abstract: A gas detection device includes a temperature control part configured to control an amount of energization to a heater so that an impedance of an element part matches a target impedance, to thereby control a temperature of the heater. The temperature control part is configured to set a first target impedance as the target impedance while performing application voltage control for air-fuel ratio detection, and set a second target impedance as the target impedance while performing application voltage control for SOx detection.
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公开(公告)号：US10605765B2
公开(公告)日：2020-03-31
申请号：US15841924
申请日：2017-12-14
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Keiichiro Aoki , Kazuhiro Wakao , Kazuhisa Matsuda
IPC: G01N27/407 , G01N33/00
Abstract: A gas detection device includes a voltage applying unit configured to apply a voltage across a first electrode and a second electrode of an electrochemical cell and a measurement control unit configured to perform a first application voltage sweep and a second application voltage sweep which have different sweeping voltage ranges, to acquire a first parameter based on the output current of the first application voltage sweep, to acquire a second parameter based on the output current of the second application voltage sweep, to calculate a SOx detection parameter which is a difference or a ratio between the first parameter and the second parameter, and to perform determination of whether sulfur oxides with a predetermined concentration or higher are contained in an exhaust gas or detection of a concentration of sulfur oxides in the exhaust gas based on the SOx detection parameter.
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公开(公告)号：US10288001B2
公开(公告)日：2019-05-14
申请号：US15868578
申请日：2018-01-11
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Yasushi Ono , Keiichiro Aoki , Koji Ide , Go Hayashita
Abstract: The control system of an internal combustion engine controls an internal combustion engine comprising an exhaust sensor. The control system comprises a motoring device driving rotation of a crankshaft of the internal combustion engine, a motoring control part configured to control the motoring device, a heater control part configured to control supply of electric power to the heater, and a temperature estimating part configured to estimate a temperature of the sensor element. The motoring control part is configured to drive the motoring device for a predetermined time when the temperature of the sensor element estimated by the temperature estimating part is outside a predetermined cracked element temperature region while the heater control part is supplying electric power to the heater, and stop driving the motoring device when the temperature of the sensor element is within the cracked element temperature region.
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公开(公告)号：USRE47116E1
公开(公告)日：2018-11-06
申请号：US15365299
申请日：2016-11-30
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Keiichiro Aoki , Hiroki Nishijima
Abstract: A control apparatus for an internal combustion engine detects an amount of particulate matter contained in an exhaust gas in an exhaust passage, according to an electrical property across electrodes of a particulate matter sensor disposed in the exhaust passage of the internal combustion engine. The term “electrical property” here refers to a property that changes with the amount of particulate matter deposited, for example, a current value of when a predetermined voltage is applied. After the internal combustion engine is started and detection of the amount of the particulate matter is completed, an element section of the particulate matter sensor is set to a predetermined temperature range. The particulate matter deposited on the element section is thereby burned and removed. The control apparatus maintains the element section in the predetermined temperature range after burning and removing the particulate matter until the internal combustion engine stops.
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公开(公告)号：US20180172633A1
公开(公告)日：2018-06-21
申请号：US15841941
申请日：2017-12-14
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Kazuhisa Matsuda , Kazuhiro Wakao , Keiichiro Aoki
Abstract: A gas detection device includes: an element portion; a voltage applying unit configured to apply a voltage across a first electrode and a second electrode on surfaces of a solid electrolyte; a current detecting unit configured to detect an output current flowing between the first electrode and the second electrode; and a measurement control unit. The measurement control unit acquires a parameter which has a correlation with a degree of change of the output current increasing as a concentration of sulfur oxides in an exhaust gas increases based on the output current, and performs determination of whether the concentration of sulfur oxides in the exhaust gas is equal to or higher than a predetermined value or detection of the concentration of sulfur oxides in the exhaust gas based on the acquired parameter.
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