Intake manifold assembly for a multicylinder internal combustion engine

US5009200A · kind A · utility

Assignee

• AUDI AG · DE

Inventors

• Richard van Basshuysen · Zell am Harmersbach, DE
• Armin Bauder · Neckarsulm, DE

Key dates

• Filing date: Mar 16, 1990
• Grant date: Apr 23, 1991
• Expiry date: Mar 16, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In an intake manifold assembly for a multicylinder internal combustion engine with at least three inlet valves 4, 5, 6, to which lead individual intake manifolds 9, 10, 11 of different length, the shorter individual intake manifold of which 10, 11 can be put into operation, as the revolutions per minute and/or the load increases, by opening the shutoff valves 18, 19, the effective length of each individual intake manifold is shortened to the length of a shorter individual intake manifold, when the latter is put into operation, owing to the fact that appropriate intake ports 22, 24, 26 have been provided, which are controlled by control butterfly valves 23, 25, 27. Such an arrangement accomplishes that the resonating tube length of all individual intake manifolds, which have been put into operation, is the same, so that an optimum power output is ensured.