Numerical investigation of the effect of injection strategy on a high-pressure isobaric combustion engine

High-pressure isobaric combustion adopted in the double compression expansion engine (DCEE) has prospect to achieve higher thermal efficiency compared conventional diesel combustion. This work numerically explored effects of various injection strategies on and emission characteristics The study developed a mathematical model predict rate profile. After validations, extensive simulations were conducted with peak pressure up 300 bar – mimicking high-pressure unit DCEE. Several major design parameters such as exhaust recirculation gas (EGR) rate, speed, strategy, intake varied evaluated. results demonstrated that EGR resulted loss but lower heat transfer owing temperature, so exhibited firstly growing then declining trend. Besides, speed generated due shorter duration thus loss. Consequently, 47.5% was achieved at = 50% 1800 rpm. cylinder performance can also be improved an appropriate introduction isochoric combustion, its impact whole DCEE setup needs further investigation.