Integrated Exhaust Manifold Cylinder Head Design Methodology for RDE in Gasoline Engine application
In recent years, world-wide automotive manufacturers have been continuously working in the research of suitable technical solutions to meet upcoming stringent Real Driving Emission (RDE) and Corporate Average Fuel Economy (CAFÉ) targets, as set by international regulatory authorities. Many technologies have been already developed, or are currently under study by automotive manufacturer for gasoline engines, to meet legislated targets. In-line with above objective, , Integrated Exhaust Manifold (IEM) is the key technology of the Internal Combustion (IC) engine to expand lambda 1 region expansion by reducing fuel enrichment at high load-high RPM by reducing exhaust gas temperature for RDE regulation. This technology also helps to increase fuel economy during cold start stage of World-wide harmonized Light vehicles Test Cycles (WLTC) by faster warm-up and High Speed fuel consumption by fuel enrichment reduction.