TY JOUR TI Calculation method for determining the dimensions of a structurally modified piston ring of a new seal for parts of a marine diesel engine cylinder piston group KW cylinder piston group KW piston ring KW friction KW cylinder sleeve KW piston KW efficiency KW compression KW pressure KW combustion chamber KW ring self-elasticity JO Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies AU Kuritsyn, S.. AU Matveev, Y.. PY 2025 IS 2025 PB Astrakhan State Technical University