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公开(公告)号：US20230258140A1
公开(公告)日：2023-08-17
申请号：US18170318
申请日：2023-02-16
Applicant: Robert Bosch GmbH
Inventor： Michael Fey
CPC classification number: F02D41/0295 , F02D41/1441 , F02D41/1454 , F02D2200/0814
Abstract: A method for operating an internal-combustion engine having an exhaust gas catalyst, a first exhaust gas sensor upstream of the exhaust gas catalyst and a second exhaust gas sensor downstream of the exhaust gas catalyst. A fill level of an exhaust gas component that can be stored in the exhaust gas catalyst is determined using a theoretical catalyst model, into which, as the input value, a signal of the first exhaust gas sensor (a first signal); a signal of the second exhaust gas sensor (a second signal); and a target signal are provided. The target signal corresponds to the signal that would be expected at the determined fill level in the exhaust gas catalyst. The catalyst model is reinitiated when the deviation of the second signal from the target signal exceeds a predetermined threshold value. The fill level is also regulated, and an air-fuel mixture is adjusted.
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公开(公告)号：US11655773B2
公开(公告)日：2023-05-23
申请号：US17540118
申请日：2021-12-01
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Yuki Nose , Yuto Ikeda , Takanobu Gotoh
CPC classification number: F02D41/1475 , F02D41/0085 , F02D41/0087 , F02D41/024 , F02D41/0295 , F02D41/1454 , F02D2200/0802 , F02D2200/0814
Abstract: A control device and a control method for a multi-cylinder internal combustion engine including a post-processing device are provided. The control device includes an electronic control unit executing a temperature raising process of raising the temperature of the post-processing device and a recovery-time process. The temperature raising process includes a stopping process and a rich process. In the stopping process, supply of fuel to several of cylinders is stopped. In the rich process, the air-fuel ratio of an air-fuel mixture for different ones of the cylinders other than the several cylinders is made lower than the stoichiometric air-fuel ratio. In the recovery-time process, the concentration of unburned fuel in exhaust gas discharged to the exhaust passage is made higher than an equivalent concentration, when the temperature raising process is stopped. The equivalent concentration is the concentration of unburned fuel being just enough to react with oxygen in the exhaust gas.
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3.发明申请公开(公告)号：US20190085747A1
公开(公告)日：2019-03-21
申请号：US15711304
申请日：2017-09-21
Applicant: GM Global Technology Operations LLC
Inventor： Michael A. Smith , Christopher L. Whitt , Sarah Funk , Shouxian Ren
CPC classification number: F01N3/22 , F01N3/08 , F01N3/0864 , F01N9/00 , F01N2370/04 , F01N2430/00 , F01N2430/06 , F01N2570/16 , F01N2900/1624 , F02D11/105 , F02D41/0295 , F02D2041/1412 , F02D2200/0814 , F02D2250/18
Abstract: Technical solutions are described for limiting exposure of components of an emissions control system to rich exhaust conditions. An example an emissions control system includes an oxygen storage component; and a controller that limits exposure of the oxygen storage component to rich exhaust conditions. The limiting includes determining an air-to-fuel equivalence ratio in exhaust gas in response to an engine receiving a request to generate torque, the request including a displacement of a pedal; determining an amount of oxygen in the exhaust gas based on the air-to-fuel equivalence ratio; determining an oxygen level stored by the oxygen storage component; and if the oxygen level is above a predetermined threshold, lowering a torque generation rate of the engine, which specifies amount of torque generated per unit displacement of the pedal.
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公开(公告)号：US10072545B2
公开(公告)日：2018-09-11
申请号：US15200136
申请日：2016-07-01
Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Inventor： Shigemasa Hirooka
CPC classification number: F01N3/20 , F01N3/0885 , F01N3/101 , F01N2900/0416 , F01N2900/1402 , F01N2900/1624 , F02D41/0295 , F02D41/1454 , F02D41/146 , F02D2200/0814
Abstract: An exhaust purification system of an internal combustion engine having an upstream side catalyst a downstream side catalyst, a downstream side air-fuel ratio sensor provided between the upstream side catalyst and the downstream side catalyst, and a control device able to control an air-fuel ratio of exhaust gas flowing into the upstream side catalyst as air-fuel ratio control.
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公开(公告)号：US20180163652A1
公开(公告)日：2018-06-14
申请号：US15610470
申请日：2017-05-31
Inventor： Jin Woo CHOUNG , SooMin LEE , SungJae KIM
CPC classification number: F02D41/0295 , F01N3/0864 , F01N3/0885 , F01N3/101 , F01N9/00 , F01N11/002 , F01N11/007 , F01N2430/00 , F01N2900/1624 , F02D41/064 , F02D41/126 , F02D41/1445 , F02D41/1454 , F02D2200/0802 , F02D2200/0816 , Y02A50/2324 , Y02T10/22 , Y02T10/47
Abstract: A method for controlling an exhaust gas purification apparatus as a catalyst oxygen purge control method during a cold engine period of an exhaust gas purification apparatus including a three way catalyst (TWC) converter purifying exhaust gas exhausted from the engine includes determining whether a fuel cut condition of an injector which injects the fuel to the combustion chamber is satisfied; performing a fuel cut of the injector when the fuel cut condition is satisfied; determining heat load of the three way catalyst by use of a temperature detector and an exhaust gas flow rate detector; measuring oxygen storage capacity (OSC) stored in the three way catalyst according to the heat load; determining an inflection point by use of variation amount of the OSC; and controlling oxygen purge period differently around the inflection point.
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Patent Agency Ranking
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：US09982614B2
公开(公告)日：2018-05-29
申请号：US15200581
申请日：2016-07-01
Applicant: Toyota Jidosha Kabushiki Kaisha
Inventor： Go Hayashita , Koji Ide
IPC: F02D41/00 , F02D41/14 , F02D41/06 , F01N3/10 , F02D35/00 , F02D41/26 , F02D41/02 , F01N9/00 , F01N11/00
CPC classification number: F02D41/1494 , F01N3/101 , F01N9/00 , F01N11/007 , F01N2430/06 , F01N2560/025 , F01N2560/14 , F01N2560/20 , F01N2900/08 , F02D35/0015 , F02D41/0295 , F02D41/065 , F02D41/1441 , F02D41/1454 , F02D41/26 , F02D2041/1418 , F02D2200/0814 , Y02T10/22
Abstract: A control device for an internal combustion engine comprises an air-fuel ratio control part configured to control the air-fuel ratio of the exhaust gas and a heating control part configured to control the heating of the air-fuel ratio sensors. The heating control part controls the sensor heaters so that the temperature of the upstream air-fuel ratio sensor becomes less than the activation temperature and so that the temperature of the downstream air-fuel ratio sensor becomes the activation temperature or more while the internal combustion engine is stopped by the automatic stop function. The air-fuel ratio control part controls the exhaust air-fuel ratio based on the outputs of the two air-fuel ratio sensors during engine operation and control the air-fuel ratio temporarily based on only the output of the downstream air-fuel ratio sensor after the internal combustion engine has been restarted after automatic stop.
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公开(公告)号：US20170342932A1
公开(公告)日：2017-11-30
申请号：US15604188
申请日：2017-05-24
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Manuel FRANZ
CPC classification number: F02D41/222 , F02D41/008 , F02D41/0295 , F02D41/1445 , F02D41/1454 , F02D41/1495 , F02D41/26
Abstract: A method is disclosed for detecting a malfunction of an oxygen sensor in the exhaust gas system of an internal combustion engine having several cylinders. The cylinders are operated at the same air-fuel ratio and the resultant first output signal of the oxygen sensor is monitored. The cylinders are operated at varying air-fuel ratios and the resultant second output signal of the oxygen sensor is monitored. The first and second output signals are compared to determine whether the oxygen sensor has malfunctioned.
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公开(公告)号：US20170284252A1
公开(公告)日：2017-10-05
申请号：US15089513
申请日：2016-04-02
Applicant: Dorian Francis Corliss, II
Inventor： Dorian Francis Corliss, II
CPC classification number: F02D41/0295 , B01D53/9454 , B01D53/9477 , B01D53/9495 , B01D2255/904 , B01D2258/012 , F01N3/0205 , F01N3/043 , F01N3/101 , F01N3/30 , F01N13/0093 , F01N2270/02 , F01N2560/025 , F01N2560/14 , F01N2570/14 , F02D41/1441 , F02D41/1454 , F02D2250/36 , Y02T10/22
Abstract: A provision of assemblies and methods for treating an exhaust gas from an internal combustion engine. The treatment method comprises at least two catalyst stages. The exhaust gas is directed to a first stage catalyst. After the first stage catalyst, the exhaust is passed to an inter-catalyst stage comprising an exhaust cooling process and an oxygen enrichment process. Next, the exhaust is passed to a second stage catalyst for reducing carbon monoxide, ammonia and hydrocarbon concentration in the exhaust gas, before exiting via an outlet.
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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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