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1. (WO2018182486) METHOD AND SYSTEM FOR CONTROL OF AT LEAST ONE OF A DOSAGE DEVICE AND AN ENGINE

Pub. No.:    WO/2018/182486    International Application No.:    PCT/SE2018/050306
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Sat Mar 24 00:59:59 CET 2018
IPC: F01N 9/00
F01N 3/20
F01N 3/28
Applicants: SCANIA CV AB
Inventors: BIRGERSSON, Henrik
ORRLING, Stefan
TEMPELMANN, David
Title: METHOD AND SYSTEM FOR CONTROL OF AT LEAST ONE OF A DOSAGE DEVICE AND AN ENGINE
Abstract:
A method and a system for control of a dosage device and/or an engine are presented. The engine produces an exhaust stream (203) being treated by an exhaust treatment system (250) by use of at least one additive being injected into the exhaust stream (203) by the dosage device (271 ). The additive is evaporated in an evaporation chamber (280) when being injected into the exhaust stream (203). According to the invention, the method includes: - determining a time dependent condition of a position at an internal wall (281 ) of the evaporation chamber (280), the condition being determined based on the internal temperature related to the position, the internal temperature being determined based on a temperature model for the evaporation chamber (280) and an exhaust temperature for the exhaust stream (203) upstream the evaporation chamber (208); - determining a risk for at least one spatially resolved critical condition related to the position based on the time dependent condition and - controlling the dosage device (271 ) and/or the engine based on the determined risk.