中文摘要：

建立了一个适用于由正庚烷、异辛烷、甲苯和二异丁烯组成的汽油替代燃料均质压燃着火（HCCI）燃烧过程的简化机理模型，包含103种组分199个反应.二异丁烯主要通过燃料的脱氧反应消耗掉，生成三种同分异构体， JC8H15-A、JC8H15-B和JC8H15-D；燃料的分解反应也是二异丁烯的另外一条主要消耗路径，生成两种重要的C4产物， TC4H9和IC4H7.这些产物是CH2O的主要来源.甲苯掺比燃料（TRF）机理主要是基于Andrae等建立的TRF半详细机理，甲苯和二异丁烯子机理是通过路径分析和敏感性分析得到.简化机理能够很好地模拟激波管里的着火延迟和HCCI发动机实验，由此可知，本文提出的简化机理用来模拟HCCI燃烧是可靠的.

英文摘要：

A new reduced chemical kinetic model that includes 103 species and 199 reactions is developed and used to describe the oxidation of a gasoline surrogate fuel consisting of n-heptane, iso-octane, toluene, and di sobutylene （DIB） for homogeneous charge compression ignition （HCCI）. DIB is mainly consumed by H-abstraction reactions by OH radicals to form three isomers, namely JC8H15-A, JC8H15-B, and JC8H15-D. Decomposition reaction is also one of the main reactions of DIB consumption, and this process forms two important C4 products, namely TC4H9 and IC4H7. These products are the primary sources for CH2O generation. The skeletal mechanism of toluene reference fuel （TRF） is based on the existing semi-detailed TRF mechanism developed by Andrae. The toluene and DIB sub-mechanism is developed using reaction path and sensitivity analyses. Good agreements are achieved with the experimental ignition delays observed in a shock tube and an HCCI engine. The present reduced model has reliable performance for HCCI combustion simulations.