Development of FAW 2.0 L Turbocharged Gasoline Direct Injection Engine

摘要

Chinese passenger cars market is facing the transition from PFI to GDIT. In a predictable future, PFI engine will still dominate the market. The authors developed a direct injection turbocharged (GDIT) 2.0 L gasoline engine based on a port fuel injection turbocharged (PFIT) engine. The combustion system hardware was optimized by CFD simulations. Thermodynamic calculations were carried out to confirm the performance of turbocharger and the air exchange management system design. The reduced wall thickness design method of block was used and the low friction loss technologies such as Physical Vapor Deposition (PVD) and Diamond-Like Carbon (DLC) were also adopted for engine design. The optimized construction design reduced the engine's gross weight about 2 kg. The friction loss reduced 10 %. The GDIT engine's lowest BSFC reaches 238 g/kWh. The GDIT engine's BSFC at 2,000 rpm 2 bar BMEP reaches 373 g/kWh. The rated power of the engine reaches 145 kW. The maximum torque reaches 280 Nm at the speed of 1,500 r/min.