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http://dx.doi.org/10.9726/kspse.2015.19.2.040

A Study on the Spray and Combustion Characteristics of Direct-injection LPG  

Hwang, Seong-Ill (Graduate School, Dong-A University)
Chung, Sung-Sik (Department of Mechanical Engineering, Dong-A University)
Yeom, Jeong-Kuk (Department of Mechanical Engineering, Dong-A University)
Publication Information
Journal of Power System Engineering / v.19, no.2, 2015 , pp. 40-48 More about this Journal
Abstract
As advantages of LPG-DI engine, LPG is directly injected into combustion chamber during compression stroke to reduce compression temperature, prevent knock and spontaneous combustion, and adjust engine output using the amount of directly injected fuel, thereby reducing pumping loss caused by throttle valve. Stratified charge can be supplied nearby spark plugs to allow for overall lean combustion, which improves thermal efficiency and can cope with problems regarding emission regulations. In addition, it is characterized by free designing of intake manifold. Despite the fact that LPG-DI has many advantages as described above, there is lack of detailed investigation and study on spray characteristics, combustion flame characteristics, and ignition probability. In this study, a visualization experiment system that consists of visualization combustion chamber, air supply control system, emission control system, LPG fuel supply system, electronic control system and image data acquisition system was designed and manufactured. For supply of stratified charge in the combustion chamber, alignment of injector and spark plugs was made linear.
Keywords
LPG-DI(Liquefied Petroleum Gas-Direct Injection); Spark-Ignited(SI); Visualization System; Ignition Probability; Flame Propagation;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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