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
US4699104A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1986 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Jun 3, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A variable swirl siamese type intake port structure for an internal combustion engine cylinder head includes 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 which is formed with a helical end vortex portion. A control valve is fitted in the first generally straight intake passage at an upstream portion thereof so as to control its flow resistance. A bypass passage opens 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. And a downstream portion of the bypass passage is communicated to a downstream portion of the second generally helical intake passage. Thereby the resistance to flow of air-fuel mixture of the generally helical intake passage is diminished, and the engine volumetric efficiency and the maximum attainable engine output power are increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.