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Combustion Improvement of a Premixed Charge Compression Ignition Methanol Engine using Flash Boiling Fuel Injection
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 24, 2001 by SAE International in United States
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A premixed charge compression ignition methanol engine targeting a drastic decrease in NOx emissions and a brake specific energy consumption equivalent to that of a DI diesel engine has been developed (1). The problems of this combustion system are that the brake thermal efficiency decreases, and CO and THC emissions increase due to a deterioration of high load combustion. The purpose of this study is to improve the high load combustion of a premixed charge compression ignition methanol engine using a flash boiling fuel injection technique.
The results of this study have shown that the premixed charge compression ignition methanol combustion system using a flash boiling fuel injection technique increases the brake thermal efficiency, decreases CO and THC emissions, while maintaining low NOx emissions in the high load region. The reason may be that heating the fuel prior to injection causes flash boiling to occur, and the spray penetration is reduced, so that a suitable mixture is formed in the cylinder. With regard to the performance of the premixed charge compression ignition methanol combustion system using flash boiling fuel injection, the NOx emissions were cut by over one half, and the brake specific energy consumption was superior than that of a conventional diesel engine, at high loads. Particularly, when the brake specific energy consumption was 10 MJ/kWh at high load operation, NOx emissions decreased to as low as 3 g/kWh.
CitationSeko, T. and Kuroda, E., "Combustion Improvement of a Premixed Charge Compression Ignition Methanol Engine using Flash Boiling Fuel Injection," SAE Technical Paper 2001-01-3611, 2001, https://doi.org/10.4271/2001-01-3611.
- Seko, T. and Kuroda, E., “Methanol Lean Burn in an Auto-Ignition DI Engine,” SAE Paper 980531, 1998, SAE Transactions.
- Takeda, Y., Nakagome, K. and Niimura, K., “Emission Characteristics of Premixed Lean Diesel Combustion with Extremely Early Staged Fuel Injection,” SAE Paper 961163, 1996.
- Yanagihara, H., Satou, Y. and Mizutani, J., “A Simultaneous Reduction of NOx and Soot in Diesel Engines under a New Combustion System (Uniform Bulky Combustion System-UNIBUS),” 17th Int. Vienna Motor Symposium, 1996.
- Tsuchiya, K. and Seko, T., “Combustion Improvement of Heavy-Duty Methanol Engine by Using Autoignition System,” SAE Paper 950060, 1995, SAE Transactions.