Title:
EXHAUST GAS PURIFICATION SYSTEM FOR INTERNAL COMBUSTION ENGINE, AND EXHAUST GAS PURIFICATION METHOD FOR INTERNAL COMBUSTION ENGINE
Document Type and Number:
WIPO Patent Application WO/2017/191813
Kind Code:
A1
Abstract:
A first temperature T1, which is the temperature of exhaust gas Gc which has passed through an exhaust gas purification treatment device, is detected when urea water U is supplied from a urea water supply device 22. A second temperature T2, which is the temperature of exhaust gas Gc which has passed through a second exhaust gas purification treatment device, while an engine 10 is in the same operation state as when the first temperature T1 was detected, and the supply of urea water U from the urea water supply device 22 is in a stopped state, is calculated from preset data. Furthermore, an ammonia calorific value C, which is the amount of heat generated as a result of ammonia being oxidized by an ammonia slip catalyst device 15, is calculated on the basis of the first temperature T1 and the second temperature T2. Moreover, the ammonia slip amount S from a selective reduction catalyst device 14 is calculated on the basis of the ammonia calorific value C.
Inventors:
NAGASHIMA YOUHEI (JP)
Application Number:
PCT/JP2017/016957
Publication Date:
November 09, 2017
Filing Date:
April 28, 2017
Export Citation:
Assignee:
ISUZU MOTORS LTD (JP)
International Classes:
F01N3/08; B01D53/94; F01N3/18
Foreign References:
| JP2010031731A | 2010-02-12 | |||
| JP2009510333A | 2009-03-12 | |||
| JP2012087628A | 2012-05-10 | |||
| JP2015098869A | 2015-05-28 | |||
| JP2013515897A | 2013-05-09 | |||
| JP2016092375A | 2016-05-23 |
Other References:
See also references of EP 3453853A4
Attorney, Agent or Firm:
HIBIYA Yukihiko et al. (JP)
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