Interference tube (motor vehicle)

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Interference tubes are used in engine construction to change the performance characteristics of internal combustion engines. They are part of the exhaust system and have precisely matched lengths and diameters.

function

Due to the way two-stroke or four-stroke gasoline engines work , the exhaust gas flow vibrates. The main purpose of interference tubes is to amplify these vibrations and to coordinate them with one another in terms of time. Thereby, a loading effect (a slight pre-compression) is in the supply of fresh gas into the combustion chamber reached ( supercharging effect ), resulting in an increase of engine power and engine torque has resulted.

With interference tubes that are intentionally incorrectly dimensioned, the opposite effect is achieved, namely a reduction in performance, such as is used, for example, to throttle motor scooters . In these cases, it is common practice to remove the interference tube for dethrottling.

literature

  • Wolf A. Doernhoeffer: Two-stroke practice. Rieck Verlag, reprint from 1942, ISBN 3-924043-19-1