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公开(公告)号：US10300435B2
公开(公告)日：2019-05-28
申请号：US15041826
申请日：2016-02-11
Applicant: NGK Spark Plug Co., LTD.
Inventor： Takaya Yoshikawa , Kentaro Mori , Hiroyuki Suzuki
Abstract: An ammonia generation apparatus is disposed in a stage after a urea water injection unit. The ammonia generation apparatus includes a main body which has an introduction opening for introducing exhaust gas, a discharge opening for discharging the exhaust gas, a first flow passage and a second flow passage which communicate with the introduction opening and the discharge opening and which are separated from each other. The ammonia generation apparatus includes a heating unit disposed in the first flow passage, and a first changeover section which is disposed on one side of the main body where the introduction opening is provided and which can switch the exhaust gas flow passage between the first flow passage and the second flow passage.
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公开(公告)号：US10570799B2
公开(公告)日：2020-02-25
申请号：US16405087
申请日：2019-05-07
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yoshinori Hibino , Kentaro Mori
Abstract: A purification control device (12) controls a urea water injector (5) for supplying urea as a reducing agent to an SCR catalyst (4). The purification control device (12) sets a pre-deterioration maximum occlusion amount based on the SCR catalyst temperature, and estimates the concentration of ammonia discharged from the SCR catalyst (4), as an estimated ammonia concentration, based on upstream NOx concentration information, downstream NOx concentration information, urea injection amount information, the pre-deterioration maximum occlusion amount, and ammonia occlusion amount information. The purification control device (12) acquires downstream ammonia concentration information. When the downstream ammonia concentration is greater than the estimated ammonia concentration, the purification control device (12) decreases the supply amount of urea from the urea water injector (5).
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3.发明授权公开(公告)号：US10047658B2
公开(公告)日：2018-08-14
申请号：US15047738
申请日：2016-02-19
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Takaya Yoshikawa , Kentaro Mori , Hiroyuki Suzuki
Abstract: An exhaust gas temperature control apparatus adjusts the temperature of exhaust gas in a stage before an exhaust gas purification unit disposed in an exhaust pipe passage of an internal combustion engine. The exhaust gas temperature control apparatus includes a heat reservoir which can store and radiate heat, a heating member which causes the heat reservoir to store heat, and a temperature control section which controls the temperature of the exhaust gas discharged from the exhaust gas temperature control apparatus by causing the heat reservoir to store heat or radiate heat in accordance with operation state of a vehicle on which the internal combustion engine is mounted.
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Patent Agency Ranking
公开(公告)号：US09964017B2
公开(公告)日：2018-05-08
申请号：US15047824
申请日：2016-02-19
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Takaya Yoshikawa , Hiroyuki Suzuki , Kentaro Mori
CPC classification number: F01N9/002 , F01N3/0275 , F01N3/031 , F01N3/101 , F01N2410/04 , F01N2550/12 , F01N2900/08 , F01N2900/1602 , Y02T10/22 , Y02T10/47
Abstract: A particulate collection system collects particulates contained in exhaust gas discharged from an internal combustion engine. The particulate collection system includes a first particulate collection filter; a second particulate collection filter capable of storing or radiating heat; a heating member for heating the second particulate collection filter; and a control section which selectively executes collection of particulates by the first particulate collection filter, collection of particulates by the first particulate collection filter and the second particulate collection filter, and heating of the second particulate collection filter by the heating member.
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公开(公告)号：US09759586B2
公开(公告)日：2017-09-12
申请号：US15010043
申请日：2016-01-29
Applicant: NGK Spark Plug Co., LTD.
Inventor： Kentaro Mori
IPC: G01D11/24 , G01N27/407
CPC classification number: G01D11/245 , G01N27/4077
Abstract: A gas sensor includes a gas sensor element, a metallic shell, and a tubular protector fixed at a front side of the metallic shell. A front end of the gas sensor element faces an internal space formed between an inner surface of the protector and an inner surface of the metallic shell. The protector includes: a fixing portion surrounding the front side of the metallic shell and fixed to the metallic shell; a space partition portion extending radially and having inner gas introduction holes communicating with the internal space; a side wall connected to a radially inner side of the space partition portion; and a bottom wall formed on a front side of the side wall with an inner gas discharge hole. The gas sensor element is located rearward relative to an inner surface of an inner gas introduction hole located on the frontmost side.
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公开(公告)号：US09068934B2
公开(公告)日：2015-06-30
申请号：US13739543
申请日：2013-01-11
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Kentaro Mori , Soichi Kawaguchi , Ryosuke Ichida , Yoshinori Hibino
IPC: G01N27/409 , F02D41/14 , G01N27/406
CPC classification number: G01N27/409 , F02D41/042 , F02D41/1455 , F02D41/1494 , F02D41/1495 , G01N27/4065
Abstract: A gas sensor processing apparatus (1) which includes voltage shift means (11, 19, S1071) for shifting a detection element voltage VE produced between electrodes (3P, 3N) of a detection element (3) from a pre-shift voltage VE1 to a post-shift voltage VE2; recovery means (11, 19, S1072) for returning the detection element voltage VE from the post-shift voltage VE2 to the pre-shift voltage VE1 after the end of a voltage shift period TS in which the voltage VE is shifted by the voltage shift means; and deterioration index detection means S106-S107 for detecting a deterioration index ID representing the degree of deterioration of the detection element (3) on the basis of a voltage change in the recovery period TK in which the voltage VE is recovered by the recovery means.
Abstract translation: 一种气体传感器处理装置（1），包括电压偏移装置（11,19，S1071），用于将检测元件（3）的电极（3P，3N）之间产生的检测元件电压VE从预移位电压VE1移位到 移位后电压VE2; 用于在电压VE偏移了电压偏移的电压偏移周期TS结束之后将检测元件电压VE从移位后电压VE2返回到移位前电压VE1的恢复装置（11,19,30-772） 手段; 以及劣化指标检测装置S106-S107，用于根据恢复装置恢复电压VE的恢复期TK的电压变化来检测表示检测元件（3）的劣化程度的劣化指数ID。
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公开(公告)号：US10969372B2
公开(公告)日：2021-04-06
申请号：US16214344
申请日：2018-12-10
Applicant: NGK SPARK PLUG CO., LTD
Inventor： Yuji Shimazaki , Hironari Furuta , Kentaro Mori
IPC: G01N33/00
Abstract: A gas sensor includes a sensing element, a metal shell that is tubular and that surrounds the sensing element, and a protector made of a metal and fixed to the metal shell. A back end portion of the protector is joined to an outer surface of the metal shell to form a joined portion. A coefficient of thermal expansion of a material of the protector at 800 degrees Celsius is higher than a coefficient of thermal expansion of a material of the metal shell at 800 degrees Celsius. In a cross section of a portion of the gas sensor including the joined portion, a minimum distance t1 between the outer surface of the metal shell and an outer surface of the protector and a minimum distance t2 between the outer surface of the metal shell and an inner surface of the metal shell satisfy 0.6≤(t1/t2)≤2.0.
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8.发明授权公开(公告)号：US10094261B2
公开(公告)日：2018-10-09
申请号：US15170045
申请日：2016-06-01
Applicant: NGK SPARK PLUG CO., LTD.
Inventor： Yoshinori Hibino , Ryosuke Ichida , Kentaro Mori
Abstract: A purification controller 12 is configured to estimate the amount of ammonia occluded (i.e. ammonia occlusion amount) in an SCR catalyst 4, which is arranged in an exhaust pipe 52 of a diesel engine 51 so as to purify NOx in an exhaust gas of the diesel engine 51. More specifically, the purification controller 12 acquires upstream NO concentration data, upstream NO2 concentration data, downstream NOx concentration data, downstream NO2 concentration data and downstream ammonia concentration data. The purification controller 12 further acquires an urea injection amount. Then, the purification controller 12 estimates the ammonia occlusion amount based on the acquired upstream NO concentration data, upstream NO2 concentration data, downstream NOx concentration data, downstream NO2 concentration data and downstream ammonia concentration data, the acquired urea injection amount and reaction formulas for reduction of NOx with the SCR catalyst 4.
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