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公开(公告)号：US20220186643A1
公开(公告)日：2022-06-16
申请号：US17547230
申请日：2021-12-10
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Takahiro TSUKAGOSHI , Noriyasu KOBASHI , Takahiko FUJIWARA , Teruaki HAIBARA , Taku MIURA
Abstract: The exhaust purification system of an internal combustion engine includes a filter trapping particulate matter in exhaust gas flowing through an exhaust passage of the internal combustion engine and supporting a three-way catalyst, and a filter regeneration part configured to perform regeneration processing for oxidizing and removing particulate matter deposited on the filter when predetermined conditions are satisfied. The filter regeneration part is configured to increase an NO concentration in exhaust gas flowing into the filter when the predetermined conditions are satisfied compared to when the predetermined conditions are not satisfied.
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公开(公告)号：US20190107067A1
公开(公告)日：2019-04-11
申请号：US16142566
申请日：2018-09-26
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Tomokazu AKUTSU , Takashi NAKAMURA , Noriyasu KOBASHI
Abstract: A control device for an internal combustion engine includes an electronic control unit configured to execute dither control processing in a first mode and a second mode. The dither control processing is processing for operating a fuel injection valve such that an air-fuel ratio of at least one cylinder among cylinders becomes lean air-fuel ratio, and an air-fuel ratio of cylinders different from the at least one cylinder becomes rich air-fuel ratio when a condition that a regeneration request of the filter occurs is established. In the second mode, an absolute value of the difference between the air-fuel ratio in the lean combustion cylinder and the air-fuel ratio in the rich combustion cylinder smaller than in the first mode.
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公开(公告)号：US20200256238A1
公开(公告)日：2020-08-13
申请号：US16784738
申请日：2020-02-07
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Noriyasu KOBASHI , Noriyasu ADACHI , Yusuke SAITO
Abstract: An exhaust purification system of an internal combustion engine comprises a filter 23 arranged in an exhaust passage 23 of an internal combustion engine in which a plurality of cylinders 61, 62, 63, 64 cooled by cooling water are provided and trapping particulate matter in exhaust gas, a wall temperature calculation part 51 configured to calculate or detect wall temperatures of a predetermined number of equal to or more than two cylinders among the plurality of cylinders, and a PM amount calculation part 52 configured to calculate an amount of particulate matter discharged from the plurality of cylinders to the exhaust passage based on the wall temperatures calculated or detected by the wall temperature calculation part.
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公开(公告)号：US20190107027A1
公开(公告)日：2019-04-11
申请号：US16149465
申请日：2018-10-02
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Takashi NAKAMURA , Noriyasu KOBASHI
Abstract: An emission control device for an internal combustion engine is configured to perform a particulate matter trap function of trapping, with a particulate filter, particulate matter contained in exhaust gas which flows in an exhaust passage of the internal combustion engine. The emission control device includes a controller. The controller is configured to calculate a particulate matter accumulation amount, which is a total amount of particulate matter trapped by the particulate filter based on an operation condition of the internal combustion engine. The controller is configured to stop calculating the particulate matter accumulation amount when the particulate matter trap function is not functioning.
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公开(公告)号：US20210231063A1
公开(公告)日：2021-07-29
申请号：US17151875
申请日：2021-01-19
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Noriyasu KOBASHI , Noriyasu ADACHI , Yusuke SAITO
Abstract: An internal combustion engine comprises an engine body, a filter provided in an exhaust passage of the engine body and trapping particulate matter in the exhaust, and a temperature sensor detecting a temperature of gas flowing cut from the filter. A control device controlling this internal combustion engine comprises a fuel cut control pan configured to perform fuel cut control stopping a supply of fuel to a combustion chamber of the engine body and a forced ending part configured to forcibly make the fuel cut control end even if a condition for performance of fuel cut control had stood based on a trend in change of temperature of the gas temperature detected by the temperature sensor.
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Patent Agency Ranking
公开(公告)号：US20200217235A1
公开(公告)日：2020-07-09
申请号：US16730055
申请日：2019-12-30
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Noriyasu KOBASHI , Noriyasu ADACHI , Yusuke SAITO
Abstract: An exhaust purification system of an internal combustion engine comprises a filter trapping particulate matter in exhaust gas, a differential pressure sensor detecting a differential pressure before and after the filter or a differential pressure between a pressure in the exhaust passage and an atmospheric pressure, a temperature sensor detecting a temperature of exhaust gas, and a deposition calculating part configured to calculate an amount of particulate matter deposited at the filter. The deposition calculating part is configured to calculate a first estimated value of an amount of the particulate matter based on the differential pressure, calculate a second estimated value of an amount of the particulate matter based on an amount of increase of temperature of the exhaust gas, and calculate an amount of the particulate matter based on the first estimated value and the second estimated value.
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7.发明申请公开(公告)号：US20190178142A1
公开(公告)日：2019-06-13
申请号：US16207433
申请日：2018-12-03
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Naoki MAEDA , Masanao IDOGAWA , Noriyasu KOBASHI
Abstract: An exhaust purification device includes a PM filter and a differential pressure sensor for the PM filter, and calculates a first estimated amount PMf based on the operating state of the internal combustion engine and a second estimated amount PMc based on the differential pressure. The exhaust purification device performs an anomaly determination of the differential pressure sensor based on the state of the differential pressure sensor from stopping of the internal combustion engine to a startup thereof, and corrects the first estimated amount PMf based on the second estimated amount PMc when starting the internal combustion engine. The exhaust purification device calculates, as the PM deposition amount Pr, the larger value of the first and second estimated amounts, and starts a filter regeneration control of the PM filter when the PM deposition amount Pr is equal to or more than a first predetermined amount.
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公开(公告)号：US20210180488A1
公开(公告)日：2021-06-17
申请号：US17085147
申请日：2020-10-30
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Noriyasu ADACHI , Noriyasu KOBASHI , Yusuke SAITO
Abstract: An exhaust purification system includes a filter, an oxygen supply device, and a controller. The filter is configured to trap particulate matters contained in exhaust gas of an engine. The oxygen supply device is configured to supply oxygen contained in intake air of the engine to the filter. The controller is configured to execute filter regeneration processing to oxidize and remove the particulate matters deposited on the filter. The filter regeneration processing includes regeneration processing during an engine stop that is executed during a shut-down of the engine. In the regeneration processing during the engine stop, a future temperature of the filter is calculated. Then, an operation amount of the oxygen supply device is variably set based on a result of comparing the future temperature with an upper limit temperature of the filter.
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公开(公告)号：US20190136741A1
公开(公告)日：2019-05-09
申请号：US16178021
申请日：2018-11-01
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Takashi NAKAMURA , Tomokazu AKUTSU , Noriyasu KOBASHI
Abstract: A controller for an engine includes a temperature raising control unit configured to execute a temperature raising process of raising the temperature of the exhaust gas purifying member and an ambient air amount control unit configured to control driving of the adjustment mechanism. The ambient air amount control unit starts an ambient air amount increasing process that controls the adjustment mechanism so that the amount of ambient air flowing into the engine compartment is increased when the temperature raising process is being executed from that when the temperature raising process is not being executed.
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公开(公告)号：US20180149102A1
公开(公告)日：2018-05-31
申请号：US15578449
申请日：2016-06-01
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Noriyasu KOBASHI , Takashi TSUNOOKA , Takayuki OTSUKA , Hiromasa HASHIMOTO
CPC classification number: F02D41/029 , F01N3/023 , F01N9/002 , F01N2560/08 , F01N2900/1406 , F01N2900/1606 , F01N2900/1611 , F02D41/26 , F02D41/3005
Abstract: In the present invention, a first regeneration process is executed as a process for oxidizing and removing PM accumulated on the particulate filter if a measured value of a differential pressure sensor is not more than a predetermined upper limit value, assuming that the measured value of the differential pressure sensor is a value to be provided in a state in which only PM is accumulated on the particulate filter, when a difference between an estimated PM accumulation amount estimated from an operation history of an internal combustion engine and a PM accumulation amount calculated from the measured value of the differential pressure sensor is not less than a predetermined threshold value, while a second regeneration process is executed without executing the first regeneration process if the measured value is larger than the predetermined upper limit value.
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