Variable intake air apparatus

Details Variable intake air apparatus Variable intake air apparatus

1997-02-13

1998-04-21

Okonsky, David A.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02M 3510

Patent

active

057407703

ABSTRACT:
A variable intake apparatus includes an intake manifold. The manifold has a surge tank and a plurality of branch pipes extending therefrom. The air in the surge tank is drawn into the combustion chambers of an engine via the branch pipes. The lengths of the branch pipes are different. A movable pipe is slidably located in each branch pipe. The movable pipes slides within the branch pipes for changing the effective passage length of the intake passages. The passage lengths of the movable pipes are determined such that the effective intake passage lengths are equalized. A motor actuates the movable pipes to slide within the branch pipes based on the engine speed. The movable pipes integrally move with respect to the branch pipes while keeping the passage lengths of the intake passages equalized.

REFERENCES:
patent: 5009200 (1991-04-01), Van Basshuysen et al.

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