5-2-5 Investigation of High Load Operation Range Expansion in a Supercharged HCCI Engine

Abstract

We focused on a homogeneous charge compression ignition (HCCI) engine. HCCI engine can realize high efficiency and clean combustion. But it has a problem that restraint of steep combustion in the high load and control of the combustion phasing are difficult. In this study, a gaseous fuel blend was used with the aim of expanding the high load operating region. The results revealed that the region of high load operation can be suitably combining a high boost level, high exhaust gas recirculation, low compression ratio and a change in the fuel blending ratio.