Abstract
The effects of fuel components on EGR and lean limits in multi-cylinder gasoline engines were investigated. The combustion stabilities for various fuel components varying the olefin contents and adding oxygenate components such as ethanol and ETBE were especially evaluated. The experimental results show that the fuel components have a significant impact for the EGR and lean limits. It was found that the fuel containing a large volume of olefin with ethanol could extend not only EGR and lean limit but also knock limit. We revealed the potentiality for improving thermal efficiency with adjusting fuel components.
