Internal combustion engine cylinder head variable swirl siamese type intake port structure with bypass passage from straight intake passage communicated by gap to helical intake passage
A variable swirl siamese type intake port structure for an internal combustion engine cylinder head is described comprising: a first generally straight intake passage which leads to a first intake port and a second generally helical intake passage which leads to a second intake port formed with a helical end vortex portion; a control valve fitted in the first generally straight intake passage at an upstream portion thereof so as to control its flow resistance; and a bypass passage, opening from a point downstream of the control valve in the first generally straight intake passage to the helical end vortex portion of the second intake port; characterized in that: a downstream portion of the bypass passage is communicated to a downstream portion of the second generally helical intake passage.
- Assignee:
- Toyota Jidosha Kabushiki Kaisha, Aichi
- Patent Number(s):
- US 4699104
- OSTI ID:
- 5977712
- Resource Relation:
- Patent File Date: Filed date 3 Jun 1986
- Country of Publication:
- United States
- Language:
- English
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