Method for controlling discharge pump of dosing unit for liquid medium of vehicle, involves lowering pump speed according to predetermined pump speed-time-function on absolute minimum value in case of abrupt reduction of dosing amount

摘要

#CMT# #/CMT# The method involves lowering the pump speed according to a predetermined pump speed-time-function on an absolute minimum value in the case of an abrupt reduction of the dosing amount. The pump speed is lowered as quickly as possible on a predetermined value during the presentation of the abrupt reduction of the dosing amount. #CMT# : #/CMT# Independent claims are also included for the following: (1) a computer program for executing a controlling method; and (2) a computer program product with a program code. #CMT#USE : #/CMT# Method for controlling a discharge pump of a dosing unit for a liquid medium, particularly a urea dosing unit of a vehicle. #CMT#ADVANTAGE : #/CMT# The method involves lowering the pump speed according to a predetermined pump speed-time-function on an absolute minimum value in the case of an abrupt reduction of the dosing amount, and thus ensures improved discharge pump controlling method. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a graphical representation of a timing process of the dosage of urea solution into the exhaust system of the vehicle.