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A Turbo Charged Dual Fuel HCCI Engine
Technical Paper
2001-01-1896
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A 6-cylinder truck engine is modified for turbo charged 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 NOx 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 turbo charging, thus causing pump losses higher than for a comparable diesel engine. Design of turbo charger 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 NOx emissions. The maximum efficiency is 41.2%, which is slightly lower than for the original diesel engine.
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Authors
- Jan-Ola Olsson - Division of Combustion Engines, Lund Institute of Technology
- Per Tunestål - Division of Combustion Engines, Lund Institute of Technology
- Göran Haraldsson - Division of Combustion Engines, Lund Institute of Technology
- Bengt Johansson - Division of Combustion Engines, Lund Institute of Technology
Topic
Citation
Olsson, J., Tunestål, P., Haraldsson, G., and Johansson, B., "A Turbo Charged Dual Fuel HCCI Engine," SAE Technical Paper 2001-01-1896, 2001, https://doi.org/10.4271/2001-01-1896.Also In
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