Study of the Best Spark-timing Advance for LP-Gas Used in the Dual-fuel System Engines

• Main Authors: Chin, Chi-Nan, 秦志南
• Other Authors: 蘇金佳
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/84086509273082031854

碩士 === 國立臺灣大學 === 機械工程研究所 === 84 === 　　Two engines converted to dual-fuel system operated on both LP-Gas and gasoline, one is injection-type and another is carbureted-type. The first part of the experiments studies on the effect of fuel additives on spark -timing characte -ristics of the injection-types engines. The second part of the experiments studies on the effect of the LP-Gas fuel on the carbureted-types engines performance and emissions and its spark-timing characteristics. 　　It was found that significant improvements in air pollution emission and considerable loss in power occured with LP-Gas compared to gasoline at virtually all operating condition. With the spark-timing advance, the HC and NOx emission of both fuel increase obviously, but the CO emmision of LP-Gas merely increase slightly. According to the experimental analysis, the best choice for our experimental dual-fuel carbureted-types engines is 5 degrees-advance than the original engine design.