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US 4,187,820 AGranted
Intake manifold variable atomizing valve
OwnerSherwood F. Webster, Richard L. Heiseinventors
Life of this patent
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OwnerSherwood F. Webster, Richard L. Heiseinventors
Estimating the term…
An air-fuel mixture in the proper ratio is delivered by a carburetor to a variable atomizing valve which is positioned inside of the intake manifold by projecting through the main inlet opening on the customary carburetor base mounting face of the intake manifold. The atomizing valve is normally biased by an eccentric spring means to a nearly closed position but opens automatically to any required position in response to engine demand. The valve embodies an interior relatively stationary imperforate barrier sleeve and an exterior relatively movable screen assembly mounted telescopically on the barrier sleeve. The screen assembly consists of an interior comparatively coarse mesh screen surrounded by a fine mesh screen and an exterior rigid cage for the screens. The two concentric screens are in firm contact around their entire circumferences. A bearing intervened with the barrier sleeve and the rigid cage establishes a necessary jump space between the interior screen and the bore of the barrier sleeve so that the incoming fuel charge after turning will impinge with some force on the interior screen. Complete atomization of the engine fuel charge is obtained with many attendant advantages and wetting of the intake manifold with raw fuel droplets is completely avoided. The incoming fuel charge is aimed at the intake ports of the engine, is a cool charge, and travels with velocity.
In an internal combustion engine having an intake manifold to receive a fuel charge from a carburetor for delivery through said manifold to engine cylinders, said manifold having a main inlet opening for the fuel charge, the improvement comprising a mounting element adapted for interposition between said manifold and said carburetor and having a bore in communication with said main inlet opening, a fixed sleeve on the mounting element depending therefrom and extending into the intake manifold through said main inlet opening, an atomizing screen assembly telescopically engaged with the fixed sleeve and being extensible and retractable relative thereto in said manifold, said screen assembly comprising a relatively rigid cage, first and second concentric screens fixed within the cage and being in circumferential contact, bearing means between the fixed sleeve and the screen assembly and maintaining a radial space around the fixed sleeve and between it and the innermost of said concentric screens, the innermost screen being relatively coarse mesh screen and the outermost screen being a finer mesh screen, and automatically variable resistance biasing means connected with the screen assembly and resiliently urging it toward a retracted position on the fixed sleeve and yielding in response to the increased demand of an engine for fuel and increasing engine speeds to allow automatic gradual extension of the screen assembly on the fixed sleeve to progressively uncover greater screen areas through open spaces of said cage relative to the fixed sleeve.
An automatically variable fuel charge atomizing valve for an engine having an intake manifold including a fuel charge inlet, said atomizing valve comprising mounting means having a fuel charge passage to communicate with said manifold fuel charge inlet, a fixed sleeve on the mounting means extending through said fuel charge inlet to the interior of the manifold, a reciprocable atomizing screen assembly on the fixed sleeve and adapted to project varying distances from the fixed sleeve into the manifold responsive to varying demands of an engine for fuel, radial spacing means between the fixed sleeve and reciprocable atomizing screen assembly, and an automatically varying spring tension biasing means connected with the screen assembly and urging it toward a retracted position on the fixed sleeve whereby the fixed sleeve covers substantially the interior of the screen assembly to block substantially the passage of a fuel charge therethrough radially inside of the manifold, and said biasing means including an over-dead-center linkage operable to cause the biasing means to most strongly resist extension of the screen assembly on the fixed sleeve at low engine speeds and to gradually decrease resistance to extension of the screen assembly on the fixed sleeve at higher engine speeds.
An automatically variable fuel charge atomizing valve device for engines comprising a mounting element having a passage, a fixed sleeve secured to the mounting element within said passage and extending beyond one face of the mounting element for entry into an intake manifold, a substantially cylindrical atomizing screen assembly mounted for extension and retraction on said fixed sleeve and adapted to extend varying distances into the manifold across the major axis of the manifold with the fixed sleeve covering and uncovering varying screen areas of said screen assembly, bearing spacer means between the fixed sleeve and screen assembly and establishing a radial space of predetermined magnitude between the bore of the fixed sleeve and the interior of the screen assembly, and a variable tension over-dead-center biasing linkage connected with said screen assembly and resisting extension of the screen assembly on the fixed sleeve with progressively decreasing biasing force as said screen assembly is extended automatically in response to increasing engine demand for fuel.
In an internal combustion engine having an intake manifold and a down draft carburetor for delivering a fuel charge into said manifold, the improvement comprising an automatically variable atomizing valve unit including a mounting element arranged between the manifold and carburetor, a fixed sleeve on the mounting element extending inside of said manifold, a relatively movable atomizing screen assembly on the fixed sleeve and adapted to have its atomizing screen side wall progressively uncovered by the fixed sleeve during automatic movement progressively of the screen assembly into the manifold responsive to increasing engine demand for fuel, and automatically varying and gradually decreasing resistance biasing means interconnecting said mounting element and said screen assembly.
Dependencies are inferred from the claim text.