Exhaust system for internal combustion engines
AssigneeAVL List GmbH
InventorFranz Laimböck
Life of this patent
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Abstract
An exhaust system for internal combustion engines, in particular two-cycle internal combustion engines, includes a resonance-type exhaust part having at least one diffuser-cone unit formed with a diffuser, a countercone, and a connecting part with a preferably constant cross section extending between the diffuser outlet cross section and cone inlet cross section. In order to provide the resonance-type exhaust part as compact as possible by employing a simple production method, the connecting part is formed as a first deflection arc, preferably with an angle of deflection of about 180°±30°.
Claims22
An exhaust system for an internal combustion engine with a resonance-type exhaust part, comprising:
- at least one diffuser-cone unit with a diffuser, a countercone, and a connecting part for providing a first deflection arc between a diffuser outlet cross section and countercone inlet cross section;
- means forming a second deflection arc in an initial zone of the diffuser;
- and
- means forming a third deflection arc in an end zone of the countercone,
- a central line of the second deflection arc being arranged substantially in a second plane which is inclined to a first plane defined by
- a central line of the first deflection arc, with the second plane being arranged approximately normal to the first plane, and
- a third deflection arc being arranged in a third plane which is inclined to the first plane, with the third plane enclosing an angle of approximately 90° to the first plane and being arranged approximately parallel to the second plane.
A resonance-type exhaust apparatus for an internal combustion engine which comprises:
- a diffuser-countercone unit which includes a diffuser member that conveys exhaust gas therethrough, a countercone member that conveys exhaust gas therethrough, and a curved first connection part that deflects exhaust gas in a first arc from an outlet of said diffuser to an inlet of said countercone part,
- an inlet member which conveys exhaust gas therethrough,
- a second connection part which deflects exhaust gas in a second arc from an outlet of said inlet member to an inlet of said diffuser member,
- an end piece which conveys exhaust gas therethrough, and
- a third connection part which deflects exhaust gas in a third arc from an outlet of said countercone member to an inlet of said end piece,
- a central line of the third arc defining a plane which is approximately parallel with a plane defined by a central line of the second arc and approximately perpendicular to a plane defined by a central line of the first arc.
Dependencies are inferred from the claim text.