Dual-mode induction system
US5092285A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1991 |
| Grant date | Mar 3, 1992 |
| Priority date | — |
| Expiry date | Apr 15, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A dual-mode induction system for a multi-cylinder internal; combustion engine wherein an individual intake passage or runner communicates between a common air plenum and each engine cylinder. A separate bypass having an individual port at each engine cylinder extends from the plenum and each internal runner to provide a substantially shorter passage to each engine cylinder and a valve covers each bypass port and is operated in response to engine speed and/or related vehicle operating parameters to simultaneously close the bypasses at low engine speed to force intake air through the longer internal runners and provide a ram tube effect and to simultaneously open the bypasses at high engine speeds to force intake air through the shorter internal runners at a higher frequency and low resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.