A Turbocharged Dual-Fuel HCCI Engine
Author
Summary, in English
A 6-cylinder truck engine is modified for turbocharged dual-fuel Homogeneous Charge Compression Ignition (HCCI) engine operation. Two different fuels, ethanol and n-heptane, are used to control the ignition timing. The objective of this study is to demonstrate high load operation of a full-size HCCI engine and to discuss some of the typical constraints associated with HCCI operation. This study proves the possibility to achieve high loads, up to 16 bar Brake Mean Effective Pressure (BMEP), and ultra-low NOdx emissions, using turbo charging and dual fuel. Although the system shows great potential, it is obvious that the lack of inlet air pre heating is a drawback at low loads, where combustion efficiency suffers. At high loads, the low exhaust temperature provides little energy for turbocharging, thus causing pump losses higher than for a comparable diesel engine. Design of turbocharger therefore, is a key issue in order to achieve high loads in combination with high efficiency. In spite of these limitations, brake thermal efficiencies and power rating close to those of the original diesel engine are achieved with significant reduction in NOdx emissions. The maximum efficiency is 41.2%, which is slightly lower than for the original diesel engine.
Department/s
Publishing year
2001-05-07
Language
English
Publication/Series
SAE Special Publications
Volume
2001
Issue
1627
Full text
- Available as PDF - 160 kB
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Document type
Conference paper
Publisher
Society of Automotive Engineers
Topic
- Energy Engineering
Keywords
- HCCI
- High Load Operation
- Engine
- Turbocharged
Conference name
International Spring Fuels and Lubricants Meeting and Exhibition
Conference date
2001-05-07 - 2001-05-09
Conference place
Orlando, FL, United States
Status
Published
ISBN/ISSN/Other
- ISSN: 0099-5908