Effect of Divided Exhaust Period in a High Efficiency TGDI Engine

The divided exhaust period (DEP) concept was applied to a high-efficiency gasoline engine and its impact on various performance aspects were investigated. To this end, key design parameters of DEP components optimized through 1-D simulation. designed fabricated experimental verification performed an dynamometer test. developed shows suitable for electrified vehicles, with maximum thermal efficiency 42.5% as well wide sweet spot area over 40%. improvement in mainly due reduction pumping loss. Notably, the loss achieved under high gas recirculation (EGR) flow conditions, where further improvements fuel consumption could be synergistic combination implementation dilution combustion. Furthermore, significantly improved catalyst light-off time, uncharacteristic turbocharged engines, confirmed simulated cold-start heating