TEM Study on the Particles in a Direct-Injection Diesel Engine
Detailed information about particle structure is necessary to properly examine the oxidation reactivity and the interactions of airborne aerosols with their surroundings. Soot nanostructure in the diesel exhaust has been investigated extensively. This article presents the dependence of in-cylinder soot nanostructure upon combustion progress. In-cylinder soot sampling have been made on a single-cylinder conversion of a 6-cylinder, direct-injection diesel engine using a total cylinder sampling system. The structural description of soot sampled in the diesel engine, was performed by means of high-resolution transmission electron microscopy (HRTEM). The soot characteristics were also investigated by elemental analysis with an EDX system. 19 heavy elements were detected in the particles by EDX analysis and the particles containing heavy elements exhibited different morphology from soot. Soot underwent a larger degree of graphitization and growth processes during mixing-controlled combustion phase than in later combustion phase. Well-formed onion-like particles appeared at the end of the mixing-controlled combustion phase.
Jinou Song Chonglin Song Gang Lv Suong Dong Yiqiang Pei
Tianjin University
国际会议
天津
英文
1-7
2009-08-19（万方平台首次上网日期，不代表论文的发表时间）