Intake manifold assembly for a multicylinder internal combustion

Details Intake manifold assembly for a multicylinder internal combustion Intake manifold assembly for a multicylinder internal combustion

1990-03-16

1991-04-23

Okonsky, David A.

Internal-combustion engines

Multiple cylinder

123432, F02M 3510

Patent

active

050092006

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.

REFERENCES:
patent: 4627400 (1986-12-01), Takata et al.
patent: 4726343 (1988-02-01), Kruger
patent: 4765297 (1988-08-01), Richter
patent: 4860709 (1989-08-01), Clarke et al.
patent: 4877004 (1989-10-01), Nishizawa

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