Compressed Air Injection in Engine Exhaust Manifold to Improve Engine Performance and Fuel Economy 2019-26-0043
According to recent trends, almost all the modern light, medium, and heavy-duty diesel engines are turbocharged to get best power and torque. Turbocharger for internal combustion engine consists of a turbine directly coupled to a compressor. It provides higher air mass flow to the engine excess air of more than 50% can be employed in the DI engines at rated power conditions. In this concept, the detailed study was done by introducing compressed air in engine exhaust manifold before turbocharger to provide more energy to turbocharger in lower speed to enhance better performance of engine in terms of BSFC and torque. Based on the vehicle level trials, it shows that it gives benefit of around 50 mbar boost pressure at low speed ranging 800rpm to 1400rpm and it improves brake specific fuel consumption (BSFC) by 2% - 2.5% at the same speed range. During vehicle level test, it observed better drivability and it improves 2.5% fuel economy.
Keywords: BSFC, Turbo Lag, torque, vehicle duty cycle etc.