Abstract
Ignition delay times of regular gasoline (SIP regular gasoline) and gasoline surrogate (SIP gasoline surrogate S5R) consisting of n-heptane, isooctane, diisobutylene, methylcyclohexane and toluene were measured using a rapid compression machine (RCM) in the temperature range 660 - 730 K and the pressure range 3 - 5 MPa at an equivalence ratio of 0.5. The measured ignition delay times were compared with the simulated ones using a detailed kinetic model of the gasoline surrogate. Ignition delay times of both fuels decreased with increasing pressure and ignition delay times of gasoline surrogate were similar to those of regular gasoline. The simulated results were in reasonable agreement with those of the experiments. The kinetic mechanism of the gasoline autoignition under the high-pressure conditions was investigated using the kinetic model.
