Method of controlling urea dosing in an exhaust system of a vehicle
Patents
Language: |
Английский |
Type: |
Invention |
Number |
EP 2375023 B1 |
Request number: |
10159228.5 |
Request date: |
Apr 7, 2010 |
patent.field.start_date: |
|
Registration date: |
Sep 19, 2012 |
patent.field.request_publication_date: |
Oct 12, 2011 |
Authors |
Balenovic M.
,
Carberry B.P.
,
Dubkov A.A.
,
Harmsen J.
,
Reichert M.
|
Affiliations |
1 |
Ford Global Technologies, LLC Dearborn, MI 48126 (US)
|
|
The present invention relates to a method of controlling urea dosing in an exhaust system of a vehicle, wherein said urea is injected into an exhaust gas flow in said exhaust system for selective catalytic reduction, and wherein said method comprising the following steps: (i) Establishing an allocation rule for a group of parameters to characterize an operating condition in said exhaust system, and for a value of an index (UDSI) suited to characterize an Urea Deposition Severity in said exhaust system, (ii) determining a current value combination for said group of parameters for a current operation condition of said exhaust system, (iii) based on said allocation rule, allocating said value combination to a current value of said index (UDSI), and (iv) controlling urea dosing in said exhaust system based on said current value of said index (UDSI).