Method and apparatus for forming a septum for an engine intake manifold
US7556007B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2006 |
| Grant date | Jul 7, 2009 |
| Priority date | — |
| Expiry date | Aug 22, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M35/1283
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a method for forming an injection molded manifold, the portion of the mold that forms a septum is modified to provide a substantially thicker septum, preferably about 8.5 mm or greater. In the molding operation, one or more removable slides are inserted through this region of the mold, each slide being preferably about 2.5 mm thick and about 30 mm wide. The septum is cast around the slides which are then withdrawn from the septum after the polymer composite is set, resulting in a septum that is substantially thicker than a prior art septum, comprising first and second plates, each about 3 mm thick, and a plurality of open core voids about 2.5 mm high and about 30 mm wide between the plates. The improved septum is stiffer than a single 4 mm thick prior art septum, has a higher natural frequency, and improves suppression of engine noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.