Abstract
Effect of combustion temperature in the engine cylinder of diesel engine convert to Compressed Natural Gas (CNG) engine was presents in this study. The objective of this study was to investigate the engine cylinder combustion temperature effect of diesel engine convert to CNG engine on variation engine speed. Problem statement: The hypothesis was that the lower performance of CNG engine was caused by the effect of lower in engine cylinder temperature. Are the CNG engine is lower cylinder temperature than diesel engine? This research was conducted to investigate the cylinder temperature of CNG engine as a new engine compared to diesel engine as a baseline engine. Approach: In this study, the combustion temperature was investigated in 7 cases engine speed. The engine speeds variation start from 1000 rpm until 4000 rpm with variation in 500 rpm. The engine conversion development and combustion temperature investigation was conducted at automotive laboratory, faculty of mechanical engineering, University Malaysia Pahang, Malaysia. Results: The results of the combustion temperature in the engine cylinder in variation engine speeds showed that diesel engine convert to CNG engine effect decrease the combustion temperature in the engine cylinder characteristics. Conclusion/Recommendations: In the low speed the conversion can be increase the combustion temperature, but the increasing engine speeds can be decrease the combustion temperature in the engine cylinder.
Highlights
The great problems of the world in the internal combustion engines usage until today are focuses on environment protection and economically fuel consumption
The highest maximum combustion temperature in the engine cylinder is declared at 3500 rpm engine speed, because in this case the combustion is most excellent than the other condition and unburned fuel is lowest, so the temperature product from the combustion is the highest
In the Compressed Natural Gas (CNG) engine, the highest maximum combustion temperature in the engine cylinder is declared in 1500 rpm engine speed, because in this case the combustion process is most excellent than the other condition and unburned fuel is lowest, so the temperature product from the combustion is the highest
Summary
The great problems of the world in the internal combustion engines usage until today are focuses on environment protection and economically fuel consumption. In the internal combustion engines there are any gasoline engines and diesel engines were used to generate the power in industries and transportations This problems need the new design, research and technology to find the new design of the new engine or its components so its can use of the alternative fuels another gasoline and diesel, protect and friendly with the environment, high power and efficient in fuel consumption. It is well known that the fossil fuel reserves all over the world are diminishing at an alarming rate and a shortage of crude oil is expected at the early decades of this century[1]. Compressed Natural Gas (CNG) as an alternative fuel is becoming increasingly important
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