Curved intake duct having improved flow characteristics
May 22, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInduction conduits of internal combustion engines Engine cylinder inlet port Engine cylinder exhaust port Helically-shaped intake port of an internal-combustion engine Exhaust port Internal combustion engine Engine cylinder intake port Intake device of an internal combustion engine Curved intake duct having improved flow characteristics Patent #: 4838219 InventorApplicationNo. 356017 filed on 05/22/1989US Classes:123/188.14, Valve head cooperates with manifold123/188.9Guide, lubricant, or coolantExaminersPrimary: Dolinar, Andrew M.Assistant: Macy, M. Attorney, Agent or FirmForeign Patent References
International ClassF02F 001/00AbstractThe invention is directed to an improved curved intake duct through which fluid flows. The curved intake duct includes a fairing positioned upstream and adjacent to the valve stem which extends through the duct, a fairing downstream of the valve stem and adjacent thereto and a duct floor portion on the inside of the duct at the radius of curvature of the duct. The floor portion of the duct includes a flat section. The curvature including the flat section of the floor portion is decreasing radius energy curve with a height Y at a distance X which follows the following equation, where Y=the longitudinal contour of the surface area at a distance X from X=0 to X=5.1, Y=f(x)=7.42 ⋅10-7 X4 -1.42⋅10-4 X3 +1.36⋅10-2 X2 -2.20⋅10-2 X-3.56 ⋅10-3. The fairings and the floor portion can be used separately or in any combination thereof. The improvement provided by each separate element is additive. The use of all elements provides maximum efficiency to fluid flow through the duct. | |
