Internal-combustion engines – Multiple cylinder
Patent
1989-06-02
1990-08-07
Okonsky, David A.
Internal-combustion engines
Multiple cylinder
123432, F02M 3510
Patent
active
049458655
ABSTRACT:
An engine induction system for providing air to the cylinders of an engine. The induction system includes a primary plenum and a primary runner leading therefrom to each cylinder. A primary inlet valve is generally adjacent the inlet to the primary plenum. Each of the primary runners is tuned to facilitate cylinder charging at a predetermined lower range of engine speeds. The induction system includes a secondary plenum and a secondary runner leading therefrom to each cylinder. Each of the secondary runners is tuned to facilitate cylinder charging at a predetermined higher range of engine speeds. The induction system includes valves which are operable to close at the predetermined lower range of engine speeds to obstruct air flow into the secondary plenum and the secondary runners, and to open at the predetermined higher range of engine speeds to allow air flow through the secondary plenum and the secondary runners.
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Belcher Gordon F.
General Motors Corporation
Okonsky David A.
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