Air-fuel mixture control system
Patent 4040403 Issued on August 9, 1977. Estimated Expiration Date: 
August 9, 1994. 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.
August 9, 1994. 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 References 2448131 2672329 2742886 2954020 3800533 InventorsApplicationNo. 05/634625 filed on 11/24/1975US Classes:123/522, Liquid fuel evaporating by submerged air supply123/527, Gaseous fuel and air mixer123/568.15, Having exhaust gas mixed with a constituent before entry into intake manifold261/119.2, Carburetor261/69.2Wet diaphragmExaminersPrimary: Lazarus, Ronald H.Attorney, Agent or FirmAbstractMethod and means are provided for effecting the controlled vaporization of a liquid fuel to simplify the ability to control a specific air-fuel ratio for an internal combustion engine. The invention contemplates two basic operations: first, a vaporized fuel is provided in which the fuel content is precisely known. This is accomplished by vaporizing liquid fuel with a diluent gas and separating out any fuel droplets so that the vaporized fuel is provided at the dew point. Second, orifice-venturi combination meters are incorporated in the inlet air and fuel flow paths providing respective air and fuel pressure signals which, when balanced against each other, establish a desired air-fuel ratio over a desired operating range of the internal combustion engine. | |
