Internal combustion engine air intake system with variable effective length
An air intake system for feeding intake air to combustion chambers of a multicylinder internal combustion engine having two groups of longitudinally spaced engine cylinders is described comprising: a. a longitudinally extending surge tank positioned adjacent the engine cylinders; b. flow control valve means for opening and closing the aperture, the flow control valve means including a butterfly valve pivotally mounted in the aperture of the wall extension of the extension portion; and c. actuator means responsive to engine operating conditions for controlling opening and closing of the butterfly valve to vary the extent of flow communication between the volumetric chambers through the aperture, thereby varying the effective length of the intake system with engine operating conditions.
- Assignee:
- Toyota Jidosha Kabushiki Kaisha, Aichi
- Patent Number(s):
- US 4738229
- OSTI ID:
- 7007193
- Resource Relation:
- Patent File Date: Filed date 6 Dec 1985
- Country of Publication:
- United States
- Language:
- English
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