Acoustical damping device for gaseous fueled automotive engines
August 6, 2013. 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 ReferencesTuneable intake manifold Device for the feeding of an internal combustion motor with gas Intake device for internal combustion engine Engine intake passage length varying device Selectively tuned intake manifold Arrangement for the metering of fuel and metering device therefor Intake manifold for an internal combustion engine Hydraulically-actuated fuel injection system having Helmholtz resonance controlling device Fuel injection Patent #: 5293856 InventorsAssigneeApplicationNo. 102930 filed on 08/06/1993US Classes:123/527, Gaseous fuel and air mixer123/456Common rail systemExaminersPrimary: Wolfe, Willis R.Assistant: Solis, Erick Attorney, Agent or FirmForeign Patent References
International ClassF02M 021/04AbstractA fuel supply system for a gaseous fueled automotive engine has means for damping pressure waves occurring within the fuel line between the fuel tank and the engine. In a preferred embodiment, acoustical barriers, such as annular rings, are secured to the inside of the fuel rail for partially transmitting and partially reflecting the pressure waves so that wave amplitude is decreased. An alternative embodiment comprises an acoustical barrier in the fuel line having a cylindrical section with a diameter larger than that of the fuel line. Baffles, possibly annular rings, within the cylindrical section also serve to damp the pressure waves. The acoustical barrier may also be composed of a conical section with diameters equal to that of the cylindrical section on one end and the fuel line at the other end. Acoustical barriers placed in both the fuel line and the fuel rail also effectively damp the pressure waves. | |
