A Model for the Physical Part of the Ignition Delay in a Diesel Engine

Investigations on the combustion duration and ignition delay period of a dual fuel diesel engine with hydrogen and producer gas as secondary fuels

“…As the vapor pressure of pilot diesel fuel increases exponentially with the increase in temperature, the heat transfer to the diesel droplet increases, and evaporation attained at fast rate. As a result, small time is required to form a stoichiometric mixture and hence ignition delay is small [11]. Further, for higher concentration of the gaseous fuel mixture at high load condition, the propagation of flame from various ignition centers of the pilot fuel is fast and consumes the largest part of the cylinder gaseous fuel-air mixture resulted in higher residual gas temperature [28].…”

“…and S. I. engines. The ignition delay in a diesel engine is defined as the time elapsed between the injection of first droplet in to the combustion chamber and the first sign of combustion [11]. Further, it can also be defined as the angle between the time of injection and the time at which 1% of mass fraction is burned [19].…”