Growth of Exhaust Pulsation Resonance during Rapid Engine Acceleration
2007-01-2207
05/15/2007
- Event
- Content
- The purpose of the present study is to improve the on-street exhaust noise measurement technique for regulating vehicles emitting unacceptably large exhaust noise. The method under development uses racing operation of engines with a wide-open throttle. Due to the high engine acceleration in this operation, exhaust pulsation amplitudes at resonant speeds may not increase sufficiently to represent the amplitudes under full-load acceleration conditions. To investigate the seriousness of this problem, experiments and numerical simulations were conducted. As a result, the sound level measurement error caused by the insufficient resonance growth was found to be sufficiently small for on-street tests.
- Pages
- 11
- Citation
- Ishihama, M., and Itoh, Y., "Growth of Exhaust Pulsation Resonance during Rapid Engine Acceleration," SAE Technical Paper 2007-01-2207, 2007, https://doi.org/10.4271/2007-01-2207.