A Study of High Temperature Heat Release Personalities of Hydrocarbons in HCCI Combustion

Abstract

The chemical fundamentals of HCCI combustion processes are investigated and discussed in this paper. There are two reaction routes depending on the types of hydrocarbons. N-paraffins are easily decomposed into radicals and low molecular hydrocarbons during LTHR, and those chemicals assist the start of HTHR reaction (Route 1). On the contrary, naphthenes and aromatics are mostly stable during cool flame period and ring opening reaction temperatures are different(Route 2). Those two reaction routes give the HTHR personalities of hydrocarbons in HCCI combustion.