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Combustion Improvement of Heavy-Duty Methanol Engine by Using Autoignition System
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Abstract
An autoignition DI methanol engine has been developed to improve the thermal efficiency under low load conditions. The engine was compared with glow-assisted and spark-assisted DI methanol engines, and with conventional DI diesel engines.
The results show that the autoignition occurs when the gas temperature in the cylinder exceeds approximately 900K. In the autoignition DI methanol engine, combustion proceeds rapidly, which results in high peak of heat release and short combustion duration. The thermal efficiency of the autoignition DI methanol engine, therefore, is higher than that of other type methanol engines and almost the same as that of diesel engines under low load conditions. NOx of the autoignition DI methanol engine is the lowest since it has the highest EGR.
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Tsuchiya, K. and Seko, T., "Combustion Improvement of Heavy-Duty Methanol Engine by Using Autoignition System," SAE Technical Paper 950060, 1995, https://doi.org/10.4271/950060.Also In
Alternative Fuels for Low Emissions and Improved Performance in Ci and Heavy Duty Engines
Number: SP-1093; Published: 1995-04-01
Number: SP-1093; Published: 1995-04-01
References
- Takada Y. et al Improveed Performance and Durability of a Heavy-Duty Methanol Engine 9th Int. Symp. on Alcohol Fuels 1991
- Yui H. et al Performance and Exhaust Gas Characteristics of a Glow Plug Assisted Methanol Diesel Engine 8th Int. Symp. on Alcohol Fuels 1988
- Hikino K. et al Development of Autoignition Methanol Diesel Engine and Better Fuel Economy of City Bus 9th Int. Symp. on Alcohol Fuels 1991
- Miller S. P. et al Development Status of the Detroit Diesel Corporation Methanol Engine SAE Paper No. 901564 1990