Ligne d'admission ou d'échappement pour machine alternative.

摘要

Inlet or exhaust line especially for reciprocating machine, consisting of a gas flow pipe (1), said pipe having at least one sensor (6) for measuring a physical quantity characteristic of the instant gas flow. The exhaust line further includes at least one device (3) for variably restricting the gas flow pipe cross section, causing an instant variation of the energy loss of gases flowing in said pipe (1) as a function of the quantity measured by the sensor (6), essentially to reduce low frequency gas pulsations and low frequency noise components resulting from its own presence in the gas duct. The inner pipe wall (1a) is lined with an acoustic energy absorbent material to attenuate high frequency gas pulsations and high frequency noise components generated in the pipe (1) by the restricting device (3).