METHOD TO DETERMINE LEVEL OF REDUCTANT IN A TANK

摘要

A method of determining the level of reductant in a storage tank of a Selective Catalytic Reduction dosing system comprising: a) determining the initial air pressure within said tank P1; b) pressurizing the tank; c) determining the added mass of air during said pressurization, m added; d) measuring the pressure of the tank subsequent to pressurization, P2; e) determining the volume of air in the tank from P1, P2 and m added; f) determining the level of reductant in the tank form the determined volume of air in the tank from step e) and the assumed or determined volume of the tank before and/or after pressurization.