Exhaust system of commercial vehicle: a review

Abstract

Abstract In Automobiles like Truck, Bus, Car, and other commercial vehicles, various exhaust emission norms like Euro IV and Euro VI are considered for a non-polluted environment. This paper focuses on increasing engine and vehicle performance of commercial vehicle by reducing back-pressure and noise due to after treatment systems, considering exhaust emission norms. Back-pressure in exhaust systems is calculated with advanced Computational Fluid Dynamics (CFD) technologies like ANSYS Fluent, GT Power. Backpressure in the exhaust pipe is reduced by varying length, diameter, number of bends, exhaust mass flow rate and bending angle of exhaust pipe. Narrow band noise in vehicles is predicted by Large Eddy Simulation (LES). Selective Catalytic Reduction (SCR) converts harmful NOx to harmless N2. SCR non-linearities are calculated by CFD code CONVERGE and TRIZ method. SCR urea deposit is minimized by proper nozzle position of urea spray. Diesel and gasoline particulate filter is used to filter particulate matter in diesel and gasoline engine respectively. This research focuses on the optimization of commercial vehicle exhaust systems.