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Device and method for altering the acoustic signature of an internal combustion engine

  • US 5,042,444 A
  • Filed: 03/07/1990
  • Issued: 08/27/1991
  • Est. Priority Date: 03/07/1990
  • Status: Expired due to Term
First Claim
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1. A device for altering the noise signature of a multi-cylinder internal combustion engine, said device comprising:

  • power output sensing means for producing a low-load signal when the power output request to said engine falls below a predetermined limit; and

    cylinder cutout means responsive to said low-load signal for pseudo-randomly disabling normal operation of the cylinders of said engine in a time-varying fashion to produce an aperiodic engine exhaust noise.

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