Influence of Compression Rings on the Dynamic Characteristics and Sealing Capacity of the Combustion Chamber in Diesel Engines

Internal combustion engines are widely implemented in several applications; however, they still face significant challenges due to the sealing capacity of compression rings. Gas leakage through crankcase, also known as blow-by, directly impacts power losses, overall efficiency, and global emissions. Therefore, present study investigates influence parameters such ring gap, masses, twist angle rings on chamber. A mathematical model is proposed account for geometric, dynamic, operational characteristics a single-cylinder diesel engine. The results indicated that greatest gas losses crankcase occur during stages consequence extreme pressure conditions. Specifically, at least 0.5% gases locked chamber released each cycle, while increasing mass boosts higher inertial forces In contrast, positive reduced by 7.33×10−5 g/cycle. Additionally, combined reduction gap both minimized flows 37%. conclusion, served robust tool evaluate different contribute minimizing Secondary piston motion distortion represent opportunities future studies.