Analysis of Pulsation Inside Pipe and Study on Exhaust Sound Characteristics of V Type 8 Cylinder Engine - Study on Optimized Front Pipe Junction Structure 1999-01-1651
The research of pulsation wave propagation inside exhaust pipe installed in V8 engine shows that pulsation from engine was changed by joining two front pipes in entire exhaust pipe. In short, frequency of pulsation inside the pipe is not always equal to engine explosion first order frequency or its harmonics. Accordingly, structure of junction has been studied, which indicated that having volume at junction add engine revolution first order component pressure fluctuation to blow-down wave component and makes exhaust sound worse. This phenomena is caused by irregular explosion interval on each bank of V8 engine and phase delay of propagation at junction.
Citation: Hosomi, M., "Analysis of Pulsation Inside Pipe and Study on Exhaust Sound Characteristics of V Type 8 Cylinder Engine - Study on Optimized Front Pipe Junction Structure," SAE Technical Paper 1999-01-1651, 1999, https://doi.org/10.4271/1999-01-1651. Download Citation
Toyota Motor Corporation
Noise & Vibration Conference & Exposition
Proceedings of the 1999 Noise and Vibration Conference-P-342, SAE 1999 Transactions - Journal of Passenger Cars-V108-6