AIR INTAKE SILENCER

  • US 3,712,416 A
  • Filed: 11/26/1971
  • Issued: 01/23/1973
  • Est. Priority Date: 11/26/1971
  • Status: Expired due to Term
First Claim
Patent Images

1. For a snowmobile having a two-stroke cycle engine and a carburetor for supplying an air-fuel mixture thereto, an air intake silencer, comprising:

  • a. a housing having a plurality of chambers therein;

    b. an air intake port mounted on said housing for the transfer of air to said housing;

    c. an air outlet port for the transfer of air out of said housing;

    d. means attaching said housing to said carburetor for the transfer of air from said outlet port to said carburetor;

    e. a tuning chamber defined by said housing for the reflection of pressure waves of different phase from pressure waves emanating from said two-stroke cycle engine through said air outlet port;

    f. a balancing chamber defined by said housing and disposed therein so that pressure waves emanating from said engine reach said balancing chamber at a later time than when said pressure waves reach said tuning chamber for the reflection of pressure waves of different phase than said waves reflected from said tuning chamber and different in phase from said waves emanating from said two-stroke cycle engine; and

    g. a silencing chamber defined by said housing and disposed therein so that pressure waves emanating from said engine reach said silencing chamber at a later time than when said pressure waves reach said tuning chamber and prior to when said pressure waves reach said balancing chamber, said silencing chamber having a perforated tube mounted therein with one end extending into said tuning chamber and the other end having a gradually increasing diameter and extending into said balancing chamber for changing the phase of sound pressure waves providing for their destructive interference with other sound pressure waves.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×