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Indexed by:期刊论文

Date of Publication:2008-06-01

Journal:Journal of Beijing Institute of Technology (English Edition)

Included Journals:EI

Volume:17

Issue:2

Page Number:168-172

ISSN No.:10040579

Abstract:The combustion processes of homogeneous charge compression ignition (HCCI) engines whose piston surfaces have been coated with catalyst (rhodium or platinum) were numerically investigated. A single-zone model and a multi-zone model were developed. The effects of catalytic combustion on the ignition timing of the HCCI engine were analyzed through the single-zone model. The results showed that the ignition timing of the HCCI engine was advanced by the catalysis. The effects of catalytic combustion on HC, CO and NOxemissions of the HCCI engine were analyzed through the multi-zone model. The results showed that the emissions of HC and CO (using platinum (Pt) as catalyst) were decreased, while the emissions of NOxwere elevated by catalytic combustion. Compared with'catalyst Pt, the HC emissions were lower with catalyst rhodium (Rh) on the piston surface, but the emissions of NOxand CO were higher.