A SIMPLE METHOD OF DESIGN OF REACTIVE MUFFLERS FOR SMALL TWO-STROKE AND FOUR-STROKE ENGINES

Some design rules are presented for choosing the dimensions of silencers for two-stroke and four-stroke engines. The cause of exhaust noise is explained, and details are given of the design and testing of a reactive type of silencer which makes use of pipes and chambers of tuned lengths. Test results show the silencer to be very effective with little loss of power. A major disadvantage of this type of silencer is that the relative lengths of the pipes and chambers are very critical to the performance, requiring an accuracy of manufacture within 2 percent. /TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0028808X
• Corporate Authors:

  Technical Publications Limited

  C.P.O. 3047
  Wellington,   New Zealand 
• Authors:
  • Harman, TTC
• Publication Date: 1976-10

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 236-238
• Serial:
  • NEW ZEALAND ENGINEERING
  • Volume: 31
  • Issue Number: 10
  • Publisher: Institution of Professional Engineers New Zealand
  • ISSN: 0028-808X

Subject/Index Terms

• TRT Terms: Design; Design methods; Engines; Exhaust pipes; Measurement; Metals; Motors; Mufflers; Noise; Pipe; Sound; Two stroke cycle engines
• Old TRIS Terms: Chambers; Engine noise
• ITRD Terms: 9011: Design (overall design); 1384: Exhaust pipe; 6136: Measurement; 4543: Metal; 1334: Motor; 1395: Silencer; 6748: Sound
• Subject Areas: Design; Environment; Highways; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00149887
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Jun 17 1977 12:00AM