THE ESSEX SYNCHRONOUS CANCELLATION SYSTEM--A NEW STRUCTURAL CONCEPT FOR VEHICLES

The novel Essex synchronous cancellation system has been used for cancelling low frequency exhaust (and inlet) noise "at source" for several years on a variety of diesel generators and in outdoor, including marine, environments. The same system is also being used to cancel vibration at the mounts of a piston-type compressor, mounted on a large and highly resonant seating. Vibration reduction of at least 40dB is achieved from the lowest frequency of 3Hz up to 250Hz or more. The main purpose of this paper is to show that a unique feature of the synchronous cancellation of vibration could allow the engine to be used as a structural component, instead of being a mass/spring liability.

• Supplemental Notes:
  • ISATA 83. Volume 2. International Symposium on Automotive Technology and Automation with particular reference to Electronics and Energy Saving in the Automotive Industries: Product and Process, Cologne, 19-23 September 1983.
• Corporate Authors:

  Automotive Automotion Limited

  42 Lloyd Park Avenue
  Croydon CRO 5SB, Surrey,   England 

  Ford Werke AG

  ,   Germany 
• Authors:
  • Chaplin, GBB
• Publication Date: 1983

Media Info

• Features: Figures;
• Pagination: 12 p.

Subject/Index Terms

• TRT Terms: Noise; Vehicle design; Vibration
• Old TRIS Terms: Synchronous cancellation
• Subject Areas: Design; Environment; Safety and Human Factors;

Filing Info

• Accession Number: 00393228
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: HS-037 293
• Files: HSL, USDOT
• Created Date: Mar 29 1985 12:00AM