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公开(公告)号：US10557400B2
公开(公告)日：2020-02-11
申请号：US15936114
申请日：2018-03-26
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Yoshio Hasegawa , Tomohiro Shinagawa , Yuji Miyoshi
Abstract: The cooling apparatus of the engine sets the first shut-off valve to the closed position, sets the second shut-off valve to the open position, and performs the opposite flow connection operation to supplies the cooling water directly to the cylinder block water passage from the cylinder head water passage without flowing the cooling water through the radiator and to the heat exchanger from the cylinder head water block when the engine temperature is lower than the completely-warmed temperature, and the cooling water is requested to be supplied to the heat exchanger.
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公开(公告)号：US10378467B2
公开(公告)日：2019-08-13
申请号：US15639043
申请日：2017-06-30
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Kenji Inoshita , Shuntaro Okazaki , Yuji Miyoshi
Abstract: A control device for an internal combustion engine is provided with a target air-fuel ratio setting part including a first setting control part performing normal control alternately switching a target air-fuel ratio between a predetermined first lean air-fuel ratio and a predetermined first rich air-fuel ratio and a second setting control part performing control for restoration of the storage amount stopping normal control and increasing the oxygen storage amount of a second catalyst when an output air-fuel ratio of a third air-fuel ratio sensor becomes a predetermined rich judgment air-fuel ratio or less. Further, the second setting control part is configured to set the target air-fuel ratio to a predetermined second lean air-fuel ratio larger than the first lean air-fuel ratio at the time of start of the control for restoration of the storage amount and set the target air-fuel ratio to a predetermined third lean air-fuel ratio smaller than the second lean air-fuel ratio after an exhaust with a larger air-fuel ratio than the stoichiometric air-fuel ratio flows out from the first catalyst in the time period of setting the target air-fuel ratio to the second lean air-fuel ratio.
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公开(公告)号：US10358963B2
公开(公告)日：2019-07-23
申请号：US15701607
申请日：2017-09-12
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Kiyoshi Fujiwara , Yuji Miyoshi , Shinichi Takeshima , Hiromasa Nishioka
Abstract: An exhaust purification system of an internal combustion engine comprising at least two exhaust treatment catalysts arranged in an engine exhaust passage, a hydrogen feed source, and a plurality of hydrogen feed passages for feeding hydrogen from the hydrogen feed source to the exhaust treatment catalysts. When warming up the exhaust treatment catalysts, hydrogen is fed from the hydrogen feed source through the corresponding hydrogen feed passage to the exhaust treatment catalyst with the larger rise of the exhaust removal rate when hydrogen is fed among the exhaust treatment catalysts.
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公开(公告)号：US10233805B2
公开(公告)日：2019-03-19
申请号：US15634156
申请日：2017-06-27
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shinya Asaura , Masaaki Sato , Ryohei Ono , Yuji Miyoshi
Abstract: A first fuel addition valve disposed in a portion of a first exhaust passage upstream from a first upstream purification device, a first urea addition valve disposed in a portion of the first exhaust passage between the first upstream purification device and a first downstream purification device, and a first valve cooling passage configured such that i) refrigerant passes the first urea addition valve and the first fuel addition valve in order, and ii) the refrigerant cools the first fuel addition valve after the refrigerant cools the first urea addition valve.
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公开(公告)号：US10119480B2
公开(公告)日：2018-11-06
申请号：US15591839
申请日：2017-05-10
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Yuji Yamaguchi , Hirokazu Ito , Yuji Miyoshi
Abstract: An object is to supply fresh air and EGR gas into a cylinder in good balance according to the required load in a naturally aspirated gasoline engine. When the operation state of the engine falls in a low load range, a control apparatus adjusts the degree of opening of the second throttle while keeping the first throttle fully open and controls EGR gas quantity by adjusting the degree of opening of the EGR valve. When the operation state falls in a middle load range, the apparatus controls EGR gas quantity by adjusting the degree of opening of the first throttle while keeping the EGR valve fully open. When the operation state falls in a high load range, the apparatus adjusts the degree of opening of the first throttle while keeping the second throttle fully open and controls EGR gas quantity by adjusting the degree of opening of the EGR valve.
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Patent Agency Ranking
公开(公告)号：US10087807B2
公开(公告)日：2018-10-02
申请号：US15200327
申请日：2016-07-01
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Koji Hagiwara , Toru Kidokoro , Yasushi Iwazaki , Hirotaka Saitoh , Yuji Miyoshi
Abstract: A deterioration diagnosis apparatus for an exhaust gas purification apparatus according to the invention performs an induction process when an internal combustion engine is operating at a lean air-fuel ratio, measures the air-fuel ratio of the exhaust gas flowing into the SCR catalyst and the air-fuel ratio of the exhaust gas flowing out of the SCR catalyst by the air-fuel ratio sensor during the period through which the induction process is performed, and diagnoses deterioration of the SCR catalyst based on the difference between the air-fuel ratios thus measured. The diagnosis apparatus adjusts the quantity of reducing agent supplied to a hydrogen production catalyst during the period through which the induction process is performed, taking account of the degree of deterioration of the hydrogen production catalyst.
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公开(公告)号：US09995233B2
公开(公告)日：2018-06-12
申请号：US14763592
申请日：2013-01-29
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Takanori Sasaki , Go Hayashita , Yuji Miyoshi
CPC classification number: F02D41/1444 , F01N3/225 , F01N2900/0402 , F01N2900/0416 , F02D41/0295 , F02D41/1402 , F02D41/1439 , F02D41/1454 , F02D41/1456 , F02D41/1473 , F02D41/1475 , F02D41/1477 , F02D2041/1422 , F02D2200/0814 , G01N27/41
Abstract: A control device for an internal combustion engine, equipped with: an exhaust purification catalyst provided in the exhaust passage of the internal combustion engine and capable of absorbing oxygen; a downstream air-fuel ratio sensor provided downstream from the exhaust purification catalyst in the direction of the exhaust flow; and an engine control device that controls the internal combustion engine in response to the output from the downstream air-fuel ratio sensor. The downstream air-fuel ratio sensor is configured such that the applied voltage for which the output current is zero changes in response to the exhaust air-fuel ratio, and such that when the exhaust air-fuel ratio equals the theoretical air-fuel ratio and the applied voltage in the downstream air-fuel ratio sensor is increased, the output current increases in conjunction therewith. When the air-fuel ratio of the exhaust gas is detected by the downstream air-fuel ratio sensor, the applied voltage in the downstream air-fuel ratio sensor is fixed at a constant voltage, with this constant voltage being a voltage for which the output current is zero when the exhaust air-fuel ratio is a predetermined air-fuel ratio that is leaner than the theoretical air-fuel ratio.
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公开(公告)号：US20170356361A1
公开(公告)日：2017-12-14
申请号：US15613632
申请日：2017-06-05
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Yuji Yamaguchi , Hirokazu Ito , Yuji Miyoshi
CPC classification number: F02D41/0055 , B01D53/944 , B01D53/9445 , B01D53/9495 , B01D2258/014 , F01N3/101 , F02D9/08 , F02D41/0002 , F02D41/0005 , F02D41/0235 , F02D41/123 , F02D41/126 , F02D41/26 , F02D2041/0017 , F02D2200/0804 , F02M26/17 , F02P5/045 , F02P5/1504 , F02P9/002 , Y02T10/22 , Y02T10/42 , Y02T10/47
Abstract: This disclosure is intended to suppress a noble metal supported by a three-way catalyst from being deteriorated by oxidation with the execution of fuel cut processing in a suitable manner. A control apparatus for a naturally aspirated gasoline engine is provided with a three-way catalyst, a first throttle valve, a second throttle valve arranged in the intake passage at the downstream side of the first throttle valve, an EGR valve, and a controller. When the controller carries out fuel cut processing and the temperature of the three-way catalyst is equal to or higher than a predetermined temperature, the controller introduces the EGR gas into a cylinder of the gasoline engine as intake air by fully closing the first throttle valve and by opening the EGR valve, and further controls an amount of the EGR gas by adjusting the degree of opening of the second throttle valve.
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公开(公告)号：US09719451B2
公开(公告)日：2017-08-01
申请号：US15066469
申请日：2016-03-10
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Hiroyuki Hokuto , Koichi Hoshi , Yuji Miyoshi , Yuji Yamaguchi , Kazuya Suzuki
CPC classification number: F02D41/2461 , F01N3/10 , F01N9/00 , F01N2430/06 , F01N2550/02 , F01N2560/025 , F01N2570/04 , F01N2900/1404 , F01N2900/1624 , F02D41/008 , F02D41/0085 , F02D41/0295 , F02D41/1454 , F02D41/1475 , F02D2200/0802 , F02D2200/602 , Y02T10/47
Abstract: An exhaust purification system of an internal combustion engine which has a plurality of cylinders is comprised of an exhaust purification catalyst, a downstream side air-fuel ratio sensor, and a control device which controls the average air-fuel ratio of the exhaust gas and the combustion air-fuel ratios of the cylinders. The control device performs average air-fuel ratio control where it alternately controls the average air-fuel ratio between the rich air-fuel ratio and the lean air-fuel ratio and inter-cylinder air-fuel ratio control where it controls the combustion air-fuel ratios of the cylinders so that the combustion air-fuel ratio becomes the rich air-fuel ratio at least at one cylinder among the plurality of cylinders. In average air-fuel ratio control, the average air-fuel ratio is controlled so that the lean shift amount becomes smaller than the rich shift amount when the temperature of the exhaust purification catalyst is low and the average air-fuel ratio is controlled so that the lean shift amount becomes larger than the rich shift amount when the temperature is high.
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公开(公告)号：US11760154B2
公开(公告)日：2023-09-19
申请号：US17701077
申请日：2022-03-22
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Yuji Miyoshi
CPC classification number: B60H1/00328 , B60H1/004 , B60H1/00007 , B60H1/00278 , B60H1/00485 , B60H1/00885 , B60H1/00899 , B60H1/3228 , B60H1/32284 , B60K11/02 , F01P3/20 , F01P7/165 , B60H2001/00307 , B60K2001/003 , B60Y2400/302 , F01P2005/105 , F01P2007/146 , F01P2050/24 , F01P2060/08 , Y02A30/274
Abstract: An in-vehicle temperature adjustment system includes: a refrigeration circuit including an inter-medium heat exchanger and a vaporizer that vaporizes the cooling medium to achieve a refrigeration cycle by circulating a cooling medium; a thermal circuit including a heater core, the inter-medium heat exchanger, an engine thermal circuit, and a radiator to circulate the heating medium; and a controller that controls a distribution state of the heating medium. The thermal circuit includes: a first branch portion at which a coolant flowing out of the engine thermal circuit and the inter-medium heat exchanger is divided into coolants flowing into the heater core and into the radiator; a second branch portion at which a coolant flowing out of the heater core is divided into coolants flowing into the inter-medium heat exchanger and into the engine thermal circuit; a first adjustment valve and a second adjustment valve.
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