公开(公告)号：US20150113985A1

公开(公告)日：2015-04-30

申请号：US14568585

申请日：2014-12-12

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Bungo KAWAGUCHI ,  Tomihisa ODA ,  Tomomi ONISHI ,  Masaaki SATO ,  Satoshi KOBAYAKAWA ,  Takeru SHIRASAWA

IPC: F01N3/20 ,  F02M25/07

CPC classification number: F01N3/208 ,  F01N3/20 ,  F01N3/2013 ,  F01N13/009 ,  F01N2240/36 ,  F01N2240/40 ,  F01N2610/02 ,  F01N2610/1453 ,  F02B29/0406 ,  F02B37/22 ,  F02D41/005 ,  F02D41/0065 ,  F02D41/126 ,  F02M26/05 ,  F02M26/06 ,  F02M26/08 ,  F02M26/10 ,  F02M26/15 ,  F02M26/23 ,  F02M26/36 ,  Y02T10/24 ,  Y02T10/26 ,  Y02T10/47

Abstract: The present invention discloses an exhaust gas purification system for an internal combustion engine, which is provided with: a low pressure EGR mechanism that is equipped with a low pressure EGR passage and a low pressure EGR valve; a selective reduction type catalyst that is arranged in a portion of the exhaust passage downstream; a supply device which serves to supply an ammonia derived compound to said selective reduction type catalyst; and a control unit that causes said supply device to supply the ammonia derived compound when said low pressure EGR valve is in a valve open state, makes the amount of the ammonia derived compound supplied from said supply device larger in cases where an amount of the low pressure EGR gas flowing through said low pressure EGR passage is large, in comparison with the case where it is small.

Abstract translation: 本发明公开了一种内燃机的排气净化系统，其具备：配置有低压EGR通路和低压EGR阀的低压EGR机构， 选择性还原型催化剂，其布置在下游的排气通道的一部分中; 用于向所述选择还原型催化剂供应氨衍生化合物的供应装置; 以及控制单元，当所述低压EGR阀处于阀打开状态时，使所述供给装置供给氨衍生化合物，使得从所述供给装置供给的氨衍生物的量较大， 与其小的情况相比，流经所述低压EGR通路的高压EGR气体大。

公开(公告)号：US20180274428A1

公开(公告)日：2018-09-27

申请号：US15919928

申请日：2018-03-13

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yoshitaka NAKAMURA ,  Harufumi MUTO ,  Tomomi ONISHI ,  Yosuke HASHIMOTO ,  Koichi TSUJI

IPC: F01N11/00

CPC classification number: F01N11/007 ,  F01N11/00 ,  F01N2560/026 ,  F01N2900/0416 ,  F01N2900/1402 ,  F02D41/1463 ,  F02D41/222 ,  G01N27/4175 ,  G01N33/007 ,  Y02T10/47

Abstract: A NOx sensor abnormality detector for a NOx sensor includes a measurement chamber, a pump cell, and a sensor cell. The NOx sensor abnormality detector includes a signal receiving section configured to receive the detection value of the sensor cell, a reduction process executing section configured to execute a reduction process that reduces the discharge function of the pump cell, and an abnormality determining section configured to perform abnormality determination of the NOx sensor. The NOx sensor abnormality detector is configured to execute abnormality detection control in which the abnormality determining section performs abnormality determination of the NOx sensor based on the detection value of the sensor cell, which is input to the signal receiving section, after the reduction process executing section starts the reduction process.