Intake system for internal combustion engine
An intake system is described for an internal combustion engine having cylinders comprising an intake manifold and a surge tank member connected together to form first discrete intake passages each of which leads to one of the cylinders and is bowed substantially in a vertical plane and a volume chamber disposed on upstream ends of the first discrete intake passages characterized in that the intake manifold is provided with second discrete intake passages. Each of the branches off from one of the first discrete intake passages to extend from the inner side of the same and is shorter than the first discrete intake passages, and with a communicating passage for interconnecting the second discrete intake passages, a passage switching means is provided to open and close the second discrete intake passages according to an operating condition of the engine and a part of a wall defining the communicating passage being formed by a plate member sandwiched between the intake manifold and an outer wall of the surge tank member.
- Assignee:
- Mazda Motor Corp.
- Patent Number(s):
- US 4690106
- OSTI ID:
- 6096674
- Resource Relation:
- Patent File Date: Filed date 27 Jun 1986
- Country of Publication:
- United States
- Language:
- English
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