HCCI Closed-Loop Combustion Control Using Fast Thermal Management
Author
Summary, in English
This study applies Closed-Loop Combustion Control (CLCC) using Fast Thermal Management (FTM) on a multi-cylinder Variable Compression Ratio (VCR) engine together with load control, to achieve a favorable combustion phasing and load at all times. Step changes of set points for combustion phasing, Compression Ratio (CR), and load together with ramps of engine speed with either constant load, i.e., load control enabled, or constant fuel amount are investigated. Performances of the controllers are investigated by running the engine and comparing the result with CLCC using VCR, which was used in an earlier test. Commercial RON/MON 92/82 gasoline, which corresponds to US regular, is used in the transient tests. Limitations to the speed ramps are further examined and it is found that choice of fuel and its low temperature reaction properties has large impact on how the CLCC perform. The CLCC using FTM handles step changes in combustion phasing fairly well and has a time constant of 8 engine cycles, which is 57% faster than the CLCC using VCR even though it suffers from the large air volume between throttle and engine inlet.
Department/s
Publishing year
2004
Language
English
Pages
599-610
Publication/Series
SAE Transactions, Journal of Engines
Volume
113
Issue
3
Full text
Links
Document type
Journal article
Publisher
Society of Automotive Engineers
Topic
- Other Mechanical Engineering
Keywords
- Combustion
- Control
- HCCI
- Engine
Status
Published
ISBN/ISSN/Other
- ISSN: 0096-736X