Catalyst Conversion Rates Measurement on Engine Fueled with Compressed Natural Gas (CNG) Using Different Operating Temperatures

Further restrictions on the use of compression-ignition engines in transportation are prompting search for adaptations to run other fuels. One most popular alternative fuels is Compressed Natural Gas (CNG), which due its low carbon content can be competitive with classical This paper presents results testing a Cummins 6BT compression ignition engine that has undergone numerous modifications convert CNG power. The sequential gas injection system and were installed this engine. ratio was also lowered from 16.5 11.5 by replacing pistons. Tests conducted an dynamometer show differences emission conversion catalyst hydrocarbons contained exhaust gases. Two structurally different catalysts operating at temperatures (400 500)±2.5°C used. 500±2.5°C showed 23.5% higher rate than lower temperature range speed tested. Also external indicators, such as power torque case took values over 70% higher. research one stages comprehensive assessment possibility adaptation CNG-only fueling.