| Title | Noise Reduction Retrofit for a "New Look" Flxible® Transit Bus Service Bulletin |
|---|---|
| Record ID | 48931 |
| Personal Name Creator |
Kaye, Michael C. |
| Source | 66p. in various pagings |
| Corporate Creator | Tri-County Metropolitan Transportation District of Oregon |
| Corporate Contributor |
John A. Volpe National Transportation Systems Center (U.S.); United States. Urban Mass Transportation Administration |
| Publisher | United States. Urban Mass Transportation Administration |
| Publication Date | 19800901 |
| Language | English |
| Abstract | This document presents instructions on how to apply a noise treatment to a contemporary city transit bus without extensive structural alteration. Baseline bus configuration, noise ratings, and performance benchmarks are presented for a Flexible 111DC-D061 transit bus powered by a Detroit Diesel 8V-71N engine. The concepts and much of the hardware described in this report are transferable to similar buses. The information presented herein is of interest primarily to transit bus operators wanting to reduce noise by practical means, and to government agencies, manufacturers, and planners concerned with reducing the noise of buses in service at a moderate cost. In this report instructions are given on how to retrofit the engine with a turbocharger and ancillary hardware. Acoustic benefits and performance side-effects are given. One beneficial side-effect, because of turbocharging, is reduced harmful exhaust emissions. Another, because of smaller injectors and reduced exhaust back pressure, is fuel conservation. The instructions in this report are complete with sources for manufactured components and raw materials, and with mechanical drawings for components to be locally fabricated. Illustrations and text direct installation as well as effects of noise ratings and performance side- effects are also presented. In this report practical application is coupled with theoretical explanation throughout. |
| Rosap ID | dot:10418 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/10418 |
| TRT Terms | Buses; Noise control; Sound level; Acoustics; Exhaust gases; Diesel engine exhaust gases; Diesel engines; Fuel consumption; Urban areas; Emergency vehicles; Benefit cost analysis; Turbochargers |
| Classification | NTL - ENERGY AND ENVIRONMENT - ENERGY AND ENVIRONMENT; NTL - ENERGY AND ENVIRONMENT - Transit Energy and Environment; NTL - PUBLIC TRANSPORTATION - Bus Transportation; NTL - PUBLIC TRANSPORTATION - Transit Energy and Environment; NTL - PUBLIC TRANSPORTATION - PUBLIC TRANSPORTATION |
| Geographical Coverage |
United States |
| Contract Number | UMTA-OR-06-0005 |
| Report Number | DOT-TSC-UMTA-80-16; UMTA-OR-06-0005-80-1; PB80-226103 |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/48000/48900/48931/DOT-TSC-UMTA-80-16.pdf |
| Format | |
| Database | NTL Digital Repository |