Method and apparatus for the determination of the nitrogen oxide emission of internal combustion engines, particularly the case of ship diesel engines

摘要

A method for determining of the nitrogen oxide emission of internal combustion engines (10), in particular the case of ship diesel engines, by means of a measurement in the exhaust gas stream of the internal combustion engine,in the exhaust gas flow of the oxygen content is determined,characterized in thatthe oxygen content in the waste gas stream by means of a lambda probe (27) is determined which of the lambda probe (27) measured value obtained with a the obtained by measurement of fuel (b) indicating the size and one or more further measured values, and from the combination of these measured values of the nitrogen oxide emission is calculated,this further measured values a, several or all of the following variables are obtained by measurement:a) rotational speed (n) of the internal combustion engine (10),b) in a pressure (single) for the supply of air from the air supply duct in the region of an intake valve for the air, however, as viewed in the feed direction from this inlet valve,c) of maximum pressure (pmax) in a combustion chamber (28) of the internal combustion engine (10) immediately after the inlet of the air into the combustion chamber (28) of the internal combustion engine (10),..