Title:
EGR SYSTEM
Document Type and Number:
Japanese Patent JP2019044745
Kind Code:
A
Abstract:
To provide an EGR system capable of reducing an NOx concentration in exhaust gas emitted from a tail pipe to the atmosphere even when the NOx concentration in the exhaust gas discharged from an exhaust emission control device exceeds a reference value.SOLUTION: An EGR system 30 applied to a vehicle 1 having an exhaust emission control device 10 capable of eliminating NOx includes: an EGR passage 31; a flow rate change mechanism 32; and a control device 20 that starts execution of control processing for controlling the flow rate change mechanism so as to reduce a ratio of a flow rate of exhaust gas flowing into a tail pipe 4a and to increase a ratio of a flow rate of exhaust gas flowing into the EGR passage when an NOx concentration in exhaust gas discharged from the exhaust emission control device exceeds a preset reference value and causes the ratio of the flow rate of the exhaust gas flowing into the EGR passage to become larger than that of the flow rate of the exhaust gas flowing into the tail pipe in the control processing.SELECTED DRAWING: Figure 1
Inventors:
FUJINO RYUSUKE
Application Number:
JP2017171855A
Publication Date:
March 22, 2019
Filing Date:
September 07, 2017
Export Citation:
Assignee:
ISUZU MOTORS LTD
International Classes:
F02M26/51; F01N3/08; F02M26/06
Domestic Patent References:
| JP2000130270A | 2000-05-09 |
Foreign References:
| US20160251012A1 | 2016-09-01 | |||
| WO2012081049A1 | 2012-06-21 | |||
| US20150275737A1 | 2015-10-01 |
Attorney, Agent or Firm:
Seiryu International Patent Service Corporation
Takayoshi in the daytime
Masao Sakaizawa
Yuki Yamada
Takayoshi in the daytime
Masao Sakaizawa
Yuki Yamada