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

IPC: F01N3/08 ,  F02D41/02 ,  B01D53/94 ,  B60W10/06

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.

公开(公告)号：US10683785B2

公开(公告)日：2020-06-16

申请号：US16210009

申请日：2018-12-05

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Daichi Imai ,  Hiroshi Kobayashi

IPC: F01N3/20 ,  F01N3/08 ,  F01N9/00 ,  B01D53/94 ,  B60W10/06

Abstract: In an exhaust gas purification apparatus for an internal combustion engine, the apparatus comprising NOx storage reduction catalyst, and a controller comprising at least one processor is configured to carry out rich spike, wherein in cases where the storage amount of NOx is the same, in a period of time from the completion of the execution of the last rich spike to the start of the execution of the current rich spike, the controller makes a period of execution of the current rich spike longer, and/or a degree of richness of a rich air fuel ratio achieved by the execution of the current rich spike larger, in the case where a period of time in which a temperature of the NOx storage reduction catalyst becomes equal to or higher than a predetermined determination temperature is long than in the case where it is short.

公开(公告)号：US09988960B2

公开(公告)日：2018-06-05

申请号：US15311252

申请日：2015-05-20

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshihisa Tsukamoto ,  Kazuhiro Itoh ,  Hiromasa Nishioka ,  Daichi Imai ,  Hiroshi Ohtsuki ,  Yasumasa Notake

IPC: F01N3/023 ,  F01N3/027 ,  F01N9/00 ,  F01N11/00 ,  B01D46/00 ,  B01D46/44 ,  B01D46/46

CPC classification number: F01N3/0232 ,  B01D46/0078 ,  B01D46/446 ,  B01D46/46 ,  B01D2279/30 ,  F01N3/023 ,  F01N3/0234 ,  F01N3/027 ,  F01N9/002 ,  F01N9/007 ,  F01N11/002 ,  F01N2550/04 ,  F01N2900/0412 ,  F01N2900/0601 ,  F01N2900/1404 ,  F01N2900/1406 ,  F01N2900/1602 ,  F01N2900/1606 ,  F02D41/024 ,  F02D41/029 ,  Y02T10/26 ,  Y02T10/47

Abstract: An estimated trapped amount (PM) that is an estimated value of an amount of particulate matter that is trapped in a particulate filter arranged in an engine exhaust passage is calculated based on an engine operating state, and PM removal control is performed when the estimated trapped amount exceeds an upper limit amount. Reference temperature increase control is performed to remove the particulate matter from the particulate filter, and an actual temperature that is the temperature of the particulate filter while the reference temperature increase control is being performed is detected. A reference temperature that is the temperature of the particulate filter when it is assumed that the reference temperature increase control has been performed when the amount of particulate matter trapped in the particulate filter is a reference initial trapped amount is stored in advance. The estimated trapped amount is corrected based on the actual temperature and the reference temperature.

公开(公告)号：US10648391B2

公开(公告)日：2020-05-12

申请号：US16221684

申请日：2018-12-17

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryohei Ono ,  Masaaki Sato ,  Katsuhiro Ito ,  Akira Mikami ,  Kazuhiro Umemoto ,  Daichi Imai

IPC: F01N11/00 ,  F01N3/20

Abstract: A controller estimates a first estimated adsorption amount which is an amount of adsorption of ammonia in the SCR catalyst at the time when the SCR catalyst is assumed to be in a predetermined abnormal state, estimates a second estimated adsorption amount at the time when the SCR catalyst is assumed to be in a predetermined normal state, calculates a first slip development temperature based on the first estimated adsorption amount, and calculates a second slip development temperature based on the second estimated adsorption amount. The controller, when carrying out an abnormality diagnosis based on a concentration of ammonia in an exhaust gas at the downstream side of the SCR catalyst, carries out diagnostic temperature control so as to control the temperature of the SCR catalyst to a temperature which is equal to or more than the first slip development temperature and is less than the second slip development temperature.

公开(公告)号：US20190195114A1

公开(公告)日：2019-06-27

申请号：US16221684

申请日：2018-12-17

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryohei ONO ,  Masaaki Sato ,  Katsuhiro Ito ,  Akira Mikami ,  Kazuhiro Umemoto ,  Daichi Imai

IPC: F01N11/00

CPC classification number: F01N11/007 ,  F01N11/002 ,  F01N2550/02 ,  F01N2550/03

Abstract: A controller estimates a first estimated adsorption amount which is an amount of adsorption of ammonia in the SCR catalyst at the time when the SCR catalyst is assumed to be in a predetermined abnormal state, estimates a second estimated adsorption amount at the time when the SCR catalyst is assumed to be in a predetermined normal state, calculates a first slip development temperature based on the first estimated adsorption amount, and calculates a second slip development temperature based on the second estimated adsorption amount. The controller, when carrying out an abnormality diagnosis based on a concentration of ammonia in an exhaust gas at the downstream side of the SCR catalyst, carries out diagnostic temperature control so as to control the temperature of the SCR catalyst to a temperature which is equal to or more than the first slip development temperature and is less than the second slip development temperature.

公开(公告)号：US10071369B2

公开(公告)日：2018-09-11

申请号：US15324394

申请日：2015-05-11

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Hiroshi Otsuki ,  Hiromasa Nishioka ,  Kazuhiro Ito ,  Daichi Imai ,  Yoshihisa Tsukamoto ,  Yasumasa Notake

IPC: B01J37/03 ,  B01D53/92 ,  B01J37/02 ,  F01N3/022 ,  F01N3/035 ,  B01D46/24 ,  B01D46/00 ,  B05D7/22 ,  B01D53/88 ,  B01D53/94

CPC classification number: B01J37/0215 ,  B01D53/885 ,  B01D53/92 ,  B01D53/94 ,  B01D2046/2437 ,  B01D2255/902 ,  B01D2255/9155 ,  B01J37/0219 ,  B01J37/0221 ,  B01J37/0236 ,  B01J37/0244 ,  B05D7/22 ,  F01N3/0222 ,  F01N3/035 ,  F01N2230/00 ,  F01N2330/06 ,  F01N2330/60

Abstract: A gel which contains a component of a catalyst is prepared. The gel and another gel are arranged in layers at a position which faces open ends of exhaust flow passages of a wall flow-type particulate filter. Next, a pusher is used to push and pack the gel and other gel through the open ends to the insides of the exhaust flow passages. Next, the particulate filter is made to dry to thereby make the partition walls carry the catalyst on their surfaces or in their micropores.

公开(公告)号：US20170204763A1

公开(公告)日：2017-07-20

申请号：US15313805

申请日：2015-05-22

Applicant: Toyota Jidosha Kabushiki Kaisha

Inventor： Hiromasa Nishioka ,  Kazuhiro Ito ,  Daichi Imai ,  Yoshihisa Tsukamoto ,  Hiroshi Otsuki ,  Yasumasa Notake

IPC: F01N3/035 ,  F01N9/00 ,  F01N13/00 ,  F01N3/20

CPC classification number: F01N3/035 ,  F01N3/2066 ,  F01N3/208 ,  F01N9/002 ,  F01N13/009 ,  F01N2570/18 ,  F01N2610/02 ,  F01N2900/08 ,  F01N2900/1616 ,  Y02T10/24 ,  Y02T10/47

Abstract: An exhaust purification system including a particulate filter , a selective reduction catalyst provided at a downstream side from the filter, an ammonia ingredient feed device which feeds an ammonia ingredient to the selective reduction catalyst, a control device which controls the amount of the ammonia ingredient which is adsorbed at the selective reduction catalyst to become a target adsorption amount, and a filter regeneration system which performs filter regeneration processing to remove PM which has built up on the particulate filter when an execution start condition stands. When removal of PM is demanded, so long as the execution start condition of the filter regeneration processing by the filter regeneration system does not stand, the target adsorption amount is decreased a plurality of times in stages, and the execution start condition of the filter regeneration processing is changed to a different condition at each stage of the target adsorption amount.

公开(公告)号：US10753249B2

公开(公告)日：2020-08-25

申请号：US16258721

申请日：2019-01-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryohei Ono ,  Masaaki Sato ,  Katsuhiro Ito ,  Akira Mikami ,  Kazuhiro Umemoto ,  Daichi Imai

IPC: F01N3/20 ,  F02M26/00 ,  F01N3/035 ,  F01N13/00 ,  F01N3/08

Abstract: An exhaust emission control device for an internal combustion engine according to the present disclosure includes an exhaust emission control catalyst provided in an exhaust passage in an internal combustion engine and divided into a preceding catalyst and a succeeding catalyst, and a heating device provided in the exhaust passage between the preceding catalyst and the succeeding catalyst. The exhaust emission control catalyst is divided into the preceding catalyst and the succeeding catalyst so that a ratio of a capacity of the preceding catalyst to a total displacement of the internal combustion engine is from 0.3 to 1.5.

公开(公告)号：US10704439B2

公开(公告)日：2020-07-07

申请号：US16207891

申请日：2018-12-03

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Daichi Imai ,  Hiroshi Kobayashi

IPC: F01N3/20 ,  F01N3/08 ,  F01N13/00 ,  F01N9/00 ,  F02D41/02 ,  F02D41/14

Abstract: An exhaust gas purification apparatus for an internal combustion engine includes: a controller comprising at least one processor is configured to carry out rich spike; wherein the controller carries out supply control to supply a reducing agent to a post-stage catalyst, wherein in cases where a temperature of an NSR catalyst becomes less than a predetermined determination temperature in at least a part of a determination period of time, the controller carries out the supply control according to the execution of current rich spike; wherein the controller controls such that in cases where the storage amount of NOx is the same, an amount of supply of the reducing agent in the supply control is made larger as a period of time in which the temperature of the NSR catalyst becomes less than the predetermined determination temperature in the determination period of time becomes longer.

公开(公告)号：US10677125B2

公开(公告)日：2020-06-09

申请号：US16210008

申请日：2018-12-05

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Ryohei Ono ,  Masaaki Sato ,  Katsuhiro Ito ,  Akira Mikami ,  Kazuhiro Umemoto ,  Daichi Imai

IPC: F01N3/08 ,  B60W10/06 ,  B01D53/94

Abstract: An exhaust gas purification apparatus for an internal combustion engine includes the adsorbent, the catalyst and the heat generating element, wherein in cases where the residual capacity of the battery is smaller than a first predetermined value required for raising the temperature of the catalyst to an activation temperature thereof, and in cases where the residual capacity of the battery is larger than a second predetermined value which is smaller than the first predetermined value and which is required for raising the temperature of the adsorbent to a predetermined temperature at which the adsorbent exhibits adsorption performance required at the time of starting of the internal combustion engine, an amount of electric power to be supplied to the heat generating element from the battery is adjusted such that the temperature of the adsorbent becomes the predetermined temperature.