Title:
UREA SCR SYSTEM, CONTROL DEVICE OF UREA SCR SYSTEM AND ESTIMATION METHOD OF ACCUMULATION AMOUNT OF WHITE PRODUCT
Document Type and Number:
Japanese Patent JP2021148085
Kind Code:
A
Abstract:
To provide a urea SCR system which can accurately estimate an accumulation amount of white products in an exhaust flow passage, a control device of the urea SCR system and an estimation method of the accumulation amount of the white products.SOLUTION: A urea SCR system 100 comprises a urea water injector 101, an SCR catalyst 102 and a control device 103. The control device 103 determines an addition accumulation amount in an exhaust flow passage 105 of white products on the basis of an addition amount of urea water, a temperature of exhaust emission, and a flow rate of the exhaust emission, determines a subtraction accumulation amount in the exhaust flow passage 105 of the white products on the basis of a current accumulation amount of the white products in the exhaust flow passage 105, the temperature of the exhaust emission and the flow rate of the exhaust emission, and sets a sum of the current accumulation amount of the white products in the exhaust flow passage 105, the addition accumulation amount of the white products in the exhaust flow passage 105, and the subtraction accumulation amount of the white products in the exhaust flow passage 105 to a novel accumulation amount of the white products in the exhaust flow passage 105, thus solving a problem.SELECTED DRAWING: Figure 1
Inventors:
MIYAMOTO TAIGA
NODA KUNIO
SHIBATA SATOSHI
NODA KUNIO
SHIBATA SATOSHI
Application Number:
JP2020049749A
Publication Date:
September 27, 2021
Filing Date:
March 19, 2020
Export Citation:
Assignee:
ISUZU MOTORS LTD
International Classes:
F01N3/08; B01D53/94
Domestic Patent References:
| JP2009257190A | 2009-11-05 | |||
| JP2015010508A | 2015-01-19 | |||
| JP2011220232A | 2011-11-04 |
Foreign References:
| US20190063289A1 | 2019-02-28 |
Attorney, Agent or Firm:
Haruhisa Kinutani
Hiroyuki Hashiyama
Hiroyuki Hashiyama