Developing and Finding Efficiency of Two-Stroke Diesel Engine Exhaust Valve Grinder with Air Pressure for Marine Vessels

Abstract

The objectives of this research were to: 1) develop a grinder for diesel engine for marine vessels using air pressure, and 2) find the exhaust valve grinding efficiency of diesel engines for marine vessels using air pressure. The researcher designed and constructed the air valve lifting set with air pressure, valve stem support, valve support, and exhaust valve seat of diesel engines. After that, 5 mechanical designing experts in valve grinding evaluated the quality of the developed exhaust valve grinder for diesel engines for marine vessels with air pressure. Then, 5 sailors and mechanics of marine vessels tested and collected data. The tools for data collection consisted of suitability evaluation form, result recording form, and the satisfaction rating form. Data were analyzed by using percentage, mean and standard deviation.

The results showed that: 1) the experts were satisfied with the exhaust valve grinders of diesel engines for marine vessels with high air pressure at high level. 2) The efficiency of the exhaust valve grinder of diesel engines for marine vessels using air pressure showed that the speed was higher than using manual labor at 94.04% for 90 times of valve lift. In addition, the users were satisfied with the exhaust valve grinders of diesel engines for marine vessels using air pressure at the highest level; thus, being suitable for professional use.