Dual-mode induction system
This patent describes a dual-mode induction system for a multi-cylinder internal combustion engine having at least one intake port to each cylinder for allowing air to each cylinder for purposes of combustion. It comprises a manifold having an elongated plenum forming a cavity and a mounting surface for attachment to the engine, the manifold having an inlet air duct communicating with the plenum and a plurality of runners corresponding to and coupled respectively to each of the intake ports, each of the runners forming a loop of predetermined length and communicating with the elongated plenum, each of the runners defining a long flow path between the plenum and its respective intake port, the plenum including a wall portion and a plurality of bypass ports located in line along the wall portion, a bypass member extending and providing communication between a respective one of the bypass ports and each of the runners intermediate the intake port, the bypass member defining a flow path shorter than the predetermined length of the long flow path; and valve means for regulating the flow of air through each the bypass part to vary the effective length of the runners to maximize engine output at various engine speed conditions, the valve means including a single valve member adapted to overlay and thereby close at least a pair of the bypass ports.
- Assignee:
- Ford Motor Co., Dearborn, MI (United States)
- Patent Number(s):
- US 5092285; A
- Application Number:
- PPN: US 7-685312
- OSTI ID:
- 5337096
- Resource Relation:
- Patent File Date: 15 Apr 1991
- Country of Publication:
- United States
- Language:
- English
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