公开(公告)号：US09354191B2

公开(公告)日：2016-05-31

申请号：US13942840

申请日：2013-07-16

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Soichi Kawaguchi ,  Yoshinori Hibino ,  Ryosuke Ichida

IPC: G01N27/04 ,  G01N27/409

CPC classification number: G01N27/04 ,  G01N27/409

Abstract: An oxygen sensor controlling apparatus includes: a controller configured to obtain a degradation index of a detection element; obtain a sensor output; detect an internal resistance of the detection element by causing a temporary change between electrodes of the detection element; successively obtain a target resistance value corresponding to the internal resistance using a first sensor output that is a value of the sensor output obtained at a time before or after a period when the temporary change occurs and the degradation index; and feedback control energization of the heater so that the internal resistance becomes the target resistance value.

Abstract translation: 氧传感器控制装置包括：控制器，被配置为获得检测元件的劣化指数; 获取传感器输出; 通过使检测元件的电极之间发生暂时的变化来检测检测元件的内部电阻; 使用作为在临时变化发生的时间之前或之后获得的传感器输出的值和劣化指数的第一传感器输出，连续获得与内部电阻对应的目标电阻值; 并且加热器的反馈控制通电使得内部电阻成为目标电阻值。

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

IPC: F01N3/00 ,  F01N3/10 ,  F01N3/20 ,  F01N9/00

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.

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。