Energy loss and emissions of engine compression rings with cylinder deactivation

A novel integrated multi-physics assessment of the piston top compression ring an internal combustion engine under normal operation mode, as well subjected to cylinder deactivation is carried out. The methodology comprises ring-liner thermo-mixed hydrodynamics, elastodynamics ring, gas blow-by and emissions. Therefore, analysis provides prediction contact’s energy losses power leakage across crevices, resulting Cylinder (CDA) technology reduces unburnt fuel entering ring-pack It also shown that frictional are exacerbated CDA by much 20%. Although this lower than potential gains in usage when using CDA. optimisation would provide further efficiency improved emissions, issue which has not hitherto received attention it deserves. in-depth predicted CO, NOx HC emissions nearly 8.5%, 10% 8.7%, respectively.