REDUCTION OF AUTOMOBILE BOOMING NOISE USING ENGINE MOUNTINGS THAT HAVE AN AUXILIARY VIBRATING SYSTEM

This paper presents a new concept concerning engine mountings that can reduce engine booming noise by utilizing an additional vector. Booming noise in passenger cars, particularly those with a four-cylinder engine, is caused by exciting forces such as the second harmonic of engine intertial force. The authors have found that exciting forces transmitted from the engine to the body structure through the engine mountings are reduced by adding another vector which cancels out these exciting forces. This new vector can be obtained by using a mass-controlled region of a vibrating system possessing either a single degree of two degrees of freedom. When this optimally designed mechanism is adopted on a small passenger car, booming noise can be significantly reduced.

• Supplemental Notes:
  • From SAE Meeting held February 23-27, 1981.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Sakamoto, H
  • Yazaki, K
  • FUKUSHIMA, M
• Publication Date: 1981

Media Info

• Features: References;
• Pagination: 8 p.
• Serial:
  • Society of Automotive Engineers Preprint
  • Publisher: Society of Automotive Engineers (SAE)

Subject/Index Terms

• TRT Terms: Absorption; Automobiles; Damping (Physics); Engine mounts; Force; Motor vehicle bodies; Noise; Reduction (Chemistry); Sound level; Suppressors; Vehicle power plants; Vibration; Vibration control
• Old TRIS Terms: Antivibration mountings; Automobile bodies; Automobile engines; Mounting; Reduction; Vibration suppressors
• Subject Areas: Environment; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00342489
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: SAE 810399
• Files: TRIS
• Created Date: Jan 29 1982 12:00AM