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US 6,779,628 B2Granted
Device for producing an overtone-rich sporty exhaust sound
AssigneeHeinrich Gillet GmbH
InventorsBernd Fuhrmann, Friedrich Bielert
Life of this patent
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Abstract
The device for producing an overtone-rich, sporty exhaust sound of the exhaust system of a four-cylinder engine includes exhaust pipes with four manifold pipes, at least one front pipe and a tail pipe. The length and/or cross-section of at least one exhaust pipe differ from the length and/or cross-section of the other exhaust pipes. At least some of the exhaust pipes lead into a first, second and/or third collecting point.
Claims8
A device for producing a sporty sounding roaring exhaust sound in four-cylinder engines, the device comprising:
- a manifold with four manifold pipes, two of which pipes meet in one of two first collecting points;
- and
- two down-pipes starting at the first collecting points respectively and ending at a second collecting point, a first of the down-pipes having a cross-section wider than a second of the down-pipes, and the second down-pipe having a length greater than the first down-pipe so that exhaust gas pulses traveling along the first and second down-pipes respectively reach the second collecting point at uneven distances.
Dependencies are inferred from the claim text.