Gas Escape from Combustion Chamber to Crankcase, Analysis of a Set of Parameters Affecting the Blow by

One of the several losses of a combustion chamber is the gas leakage toward the crankcase due to imperfect sealing of the rings. Commonly known as blow by, it affects efficiency and emissions. A bibliographic review concerning the phenomenon is mentioned and starting from that, the equations that rule the ring dynamics, inter-ring pressures and mass flows are described and solved for a diesel engine using ©Ricardo RINGPAK Solver. Ring and groove dimension together with engine speed and load were the investigated parameters. However, blow by gasses shows to depend upon by many other factors.