Research Article
Friction Reduction in Compressed Natural Gas Direct Injection Engine using Piston Rings with Diffusion Chromium Coating
Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
E. Adril
Mechanical and Engineering Polytechnics, Andalas University, Padang, Indonesia
A. Muchtar
Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
A.K. Ariffin
Department of Mechanical and Materials Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia