SIMULATING NOISE FOR ACOUSTIC PERFORMANCE MAXIMIZING EFFICIENCY OF EXHAUST SILENCER WEIGHT AND SIZE

Abstract

In the highly competitive automotive business, there is a growing emphasis on developing new car models that are lighter and more cost-effective. As a result, every aspect of the car's systems is carefully optimized to reduce weight while still meeting the necessary performance standards. The exhaust system is a crucial component of the car, responsible for minimizing engine noise to acceptable levels and ensuring compliance with BP (backpressure) standards for optimal engine functioning. Optimizing the vehicle silencer system for size and weight reduction while simultaneously ensuring NVH performance, meeting backpressure requirements, and satisfying customer expectations of sound quality is a challenging task. This requires a complete overhaul of the silencer, which is highly intricate. This study aims to improve the muffler of a gasoline-powered vehicle by analyzing its acoustic performance using noise simulation. The examination and comparisons were conducted using the Transmission Loss (TL), which represents the silencer's ability to reduce sound. An evaluation was conducted on the primary muffler to measure its transmission loss (TL) and back pressure (BP). The design iterations for the interior components of the silencer have been finalized, and the transmission loss (TL) and back pressure (BP) have been predicted. The design option that corresponds to the baseline silencer performance was selected for the creation of the prototype and further experimental validation. The enhanced suppressor was verified using real-time measurements of TL (Transmission Loss) and BP (Back Pressure).Comparisons against anticipated performance indicated that the altered silencer achieved the same level of performance as the original. This method can also be employed to expedite the design cycle time throughout the existing design phases.