Title:
ENGINE EXHAUST PURIFICATION CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/074368
Kind Code:
A1
Abstract:
An NH3 supply amount control unit that reduces and corrects the amount of NH3 supplied to an SCR catalyst by an NH3 supply unit, when exhaust gas flowing into an NOX catalyst has a rich air-fuel ratio and the NOX occluded by the NOX catalyst is reduced to N2. The amount that the NH3 supply is reduced by the NH3 supply amount control unit is set so as to increase as the flowrate of exhaust gas detected or estimated by an exhaust gas flowrate detection unit increases.
Inventors:
TSUBOI GORO (JP)
YAMAGUCHI TAKAYUKI (JP)
IKEDA DAISHI (JP)
TOMITA YOSHIAKI (JP)
ISHIHARA CHIKARA (JP)
YAMAGUCHI TAKAYUKI (JP)
IKEDA DAISHI (JP)
TOMITA YOSHIAKI (JP)
ISHIHARA CHIKARA (JP)
Application Number:
PCT/JP2017/037231
Publication Date:
April 26, 2018
Filing Date:
October 13, 2017
Export Citation:
Assignee:
MAZDA MOTOR (JP)
International Classes:
F01N3/20; F01N3/08; F02D41/04; F02D45/00
Domestic Patent References:
| WO2014115303A1 | 2014-07-31 |
Foreign References:
| JP2008190461A | 2008-08-21 | |||
| JP2010116784A | 2010-05-27 | |||
| JPS518398B1 | 1976-03-16 | |||
| JP2010112345A | 2010-05-20 | |||
| JP4347076B2 | 2009-10-21 |
Other References:
See also references of EP 3524788A4
Attorney, Agent or Firm:
TANAKA Shinichiro et al. (JP)
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