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1. (WO2017153665) METHOD FOR OPTIMIZING THE CONSUMPTION OF REDUCING AGENT IN A MOTOR VEHICLE EXHAUST LINE

Pub. No.:    WO/2017/153665    International Application No.:    PCT/FR2017/050477
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Mar 04 00:59:59 CET 2017
IPC: F01N 3/20
F01N 13/00
F01N 11/00
F01N 3/10
Applicants: CONTINENTAL AUTOMOTIVE FRANCE
CONTINENTAL AUTOMOTIVE GMBH
Inventors: MAERTENS, Steven
Title: METHOD FOR OPTIMIZING THE CONSUMPTION OF REDUCING AGENT IN A MOTOR VEHICLE EXHAUST LINE
Abstract:
The invention relates to a method for optimizing the consumption of reducing agent in the form of ammonia in an exhaust line (1) comprising first and second selective catalytic reduction systems (2, 3), the second system (3) being located downstream of the first system (2) at a distance (4) therefrom, an excess of unused ammonia being conducted through the exhaust line (1), the temperature in the exhaust line (1) in the second system (3) being measured or estimated. When the temperature in the second system (3) exceeds a first maximum value or when a calculated rate of temperature increase exceeds a predefined rate of increase, and if the temperature in the second system (3) exceeds a second maximum value that is less than the first maximum value, a forced cooling operation is performed in the space (4) between the first and second systems (2, 3).