Top-feed fuel injector mounting in an integrated air-fuel system
AssigneeSiemens Electric Limited
InventorsKevin A. Murphy, Alan R. Taylor, Henry C. Dozier
Life of this patent
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Abstract
A rigid connector tube telescopically engages the fuel rail and the inlet of a top-feed fuel injector. Various embodiments of such connector tubes are disclosed. Such connector tubes enable a top-feed fuel injector to be used in an integrated air-fuel system where a fuel rail is integrally formed with a manifold such that the fuel supply ports of the fuel rail are in fixed spatial relation to the fuel injection ports of the manifold.
Claims29
An integrated air-fuel system for an internal combustion engine comprising an induction air passage via which such an engine inducts air to a combustion chamber space thereof, a fuel rail including at least one electrically operated fuel injector via which fuel is injected into said induction air passage, wherein said fuel injector comprises an inlet that is communicated with a fuel supply port of said fuel rail and an outlet that is communicated with a fuel injection port of said induction air passage, said fuel supply port and said fuel injection port being in fixed spatial relation to each other that precludes their re-positioning to any other spatial relation, characterized in that said fuel supply port and said fuel injection port are spaced apart a fixed distance that is greater than the distance between the fuel injector's inlet and outlet, and the connection of said fuel injector with said ports is established by means which includes a tube that is telescopically engaged with one of said ports via a first fluid-tight joint for selective positioning between a first position that allows said fuel injector to be disposed between said tube and the other of said ports for installation and removal of the fuel injector and to a second position that captures the fuel injector in installed position between said tube and said other of said ports, including a second fluid-tight joint between the installed fuel injector and said tube and a third fluid-tight joint between the installed fuel injector and said other of said ports.
An integrated air-fuel system for an internal combustion engine comprising an induction air passage via which such an engine inducts air to a combustion chamber space thereof, a fuel rail including at least one electrically operated fuel injector via which fuel is injected into said induction air passage, wherein said fuel injector comprises an inlet that is communicated with a fuel supply port of said fuel rail and an outlet that is communicated with a fuel injection port of said induction air passage, said fuel supply port and said fuel injection port being in fixed spatial relation to each other that precludes their relative re-positioning to any other spatial relation, characterized in that between the fuel injector's inlet and said fuel supply port there is a separate rigid tube through which fuel is conveyed from said fuel supply port to said fuel injector's inlet, said tube has telescopic engagement with said fuel supply port via a first fluid-tight joint comprising a first O-ring seal and said tube has telescopic engagement with said fuel injector's inlet via a second fluid-tight joint comprising a second O-ring seal.
An air-fuel system for an internal combustion engine comprising an induction air passage via which such an engine inducts air to a combustion chamber space thereof, a fuel rail including at least one electrically operated fuel injector via which fuel is injected into said induction air passage, wherein said fuel injector comprises an inlet that is fluid-connected with a fuel supply port of said fuel rail and an outlet that is fluid-connected with a fuel injection port of said induction air passage, characterized in that the fluid-connection of said fuel injector's inlet with said fuel supply port comprises a fluid-tight joint that comprises an O-ring seal that is axially captured on said fuel supply port between spaced apart shoulders of said fuel outlet port, in which the fluid-connection of said fuel injector's inlet with said fuel supply port comprises and the fluid-connection of said fuel injector's inlet with said fuel supply port comprises a separate rigid tube having one end that is telescopically engaged with said fuel supply port and another end that is telescopically engaged with said fuel injector's inlet, the O.D. of said one end of said separate tube having sealing contact with the I.D. of said O-ring seal.
An air-fuel system for an internal combustion engine comprising an induction air passage via which such an engine inducts air to a combustion chamber space thereof, a fuel rail including at least one electrically operated fuel injector via which fuel is injected into said induction air passage, wherein said fuel injector comprises an inlet that is communicated with a fuel supply port of said fuel rail and an outlet that is communicated with a fuel injection port of said induction air passage, characterized in that between the fuel injector's inlet and said fuel supply port there is a separate rigid tube through which fuel is conveyed from said fuel supply port to said fuel injector's inlet, said tube has telescopic engagement with said fuel supply port via a first fluid-tight joint comprising a first O-ring seal and said tube has telescopic engagement with said fuel injector's inlet via a second fluid-tight joint comprising a second O-ring seal.
An assembly method for an air-fuel system for an internal combustion engine comprising an induction air passage via which such an engine inducts air to a combustion chamber space thereof, a fuel rail including at least one electrically operated fuel injector via which fuel is injected into said induction air passage, wherein said fuel injector comprises an inlet that is communicated with a fuel supply port of said fuel rail and an outlet that is communicated with a fuel injection port of said induction air passage, characterized by telescopically connecting one end of a separate rigid tube with said fuel supply port by means of a first fluid-tight joint comprising a first O-ring seal and telescopically connecting another end of the tube with said fuel supply port by means of a second fluid-tight joint comprising a second O-ring seal.
Dependencies are inferred from the claim text.