Research on the Gas/Diesel Dual Fuel Combustion Engine with the Fuel Reformation by Piston Compression (Second Report)

- Influences of the reformed gas composition on combustion characteristics –

Abstract

The lean combustion of reformed gases has a potential for low NOx emissions and high thermal efficiency. The reformed gases are produced by piston compression of rich mixture in a reformer cylinder, introduced to a power cylinder with air, and ignited with diesel micro-pilot injection. The research is focused on the combustion characteristics of reformed gases in the power cylinder. The engine tests with representative reformed gases are conducted, and the operational ranges are investigated. Further, the optimum gas compositions for the various engine operations are analyzed from the points of ignitability and combustion duration with the kinetic reaction simulations.