Inlet or exhaust line for a reciprocating machine

摘要

PCT No. PCT/FR93/00703 Sec. 371 Date Jan. 27, 1995 Sec. 102(e) Date Jan. 27, 1995 PCT Filed Jul. 7, 1993 PCT Pub. No. WO94/01659 PCT Pub. Date Jan. 20, 1994An inlet or exhaust line for a reciprocating machine attenuates the sound level of the machine while being simple and economical to produce. A sensor measures the instantaneous flow rate of gases passing through the line while a restriction device variably restricts the cross-section of the line as a function of the instantaneous flow rate measured by the sensor. Material for absorbing acoustic energy covers the internal wall of the line.