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US 4,159,703 AGranted
Air assisted fuel atomizer
AssigneeThe Bendix Corporation
InventorEndre A. Mayer
Life of this patent
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Abstract
An improved air assisted fuel atomizer is disclosed herein. The atomizer receives air from a source having a higher pressure than the output environment of the atomizer and fuel under pressure from a pulsed source. Each fuel pulse is injected tangentially into a circular fuel swirl chamber to form a rotating fuel ring concentric with air path through the atomizer. Fuel from the rotating fuel ring is gradually carried off by the air flow to produce uniformly distributed effectively continuous air/fuel mixture. In the preferred embodiment the air assisted fuel atomizer is embodied in an internal combustion engine, single point fuel injection system.
Claims25
A delivery system for providing an atomized air/fuel mixture to the intake manifold of an internal combustion engine comprising:
- a throttle body connected to the intake manifold having a primary air passageway therethrough providing an air flow path from an external source to the intake manifold;
- throttle valve means disposed in said throttle body for controlling the air flow through said primary air passageway in response to operator commands;
- means for generating signals having a value indicative of the engine's fuel requirement;
- fuel delivery means for delivering a quantity of fuel in response to said signals, said fuel delivery means including at least one fuel control valve having an input port receiving fuel under pressure from an external source and an output port outputting said quantity of fuel;
- atomizer means disposed in said air passageway downstream of said throttle valve means, said means comprising an air chamber having a cylindrical inner surface, a secondary air passageway conducting air from said primary air passageway upstream of said throttle valve means to said air chamber tangential to said cylindrical surface, an orifice concentric with said air chamber restricting the air flow through the said air chamber, a generally circular fuel swirl chamber disposed adjacent to said orifice, connecting means connecting the output port of said fuel control valve with said fuel swirl chamber for injecting said quantity of fuel into said fuel swirl chamber tangential to the inner surface of said fuel swirl chamber to form a fuel ring therein, and an exit port conducting the air received by said air chamber and the fuel injected into said fuel swirl chamber back into said air passageway downstream of said atomizer means.
2 more elements
In combination with an air/fuel delivery system for an internal combustion engine having:
- an intake manifold directing the air fuel mixture to the individual engine cylinders;
- a throttle body connected to the intake manifold having a primary air passageway therethrough providing an air path from an external source to the intake manifold;
- throttle valve means disposed in said throttle body for controlling the air flow through said primary air passageway in response to operator commands;
- means for generating signals having a valve indicative of the engine's fuel requirements;
- and
- fuel delivery means for delivering a quantity of fuel in response to said signals, said fuel delivery means having an input port receiving pressurized fuel from an external source and an output port outputting said quantity of fuel;
- an improved air assisted fuel atomizer comprising:
- an atomizer housing disposed in said throttle body downstream of said throttle valve means and concentric with said primary air passageway;
- a secondary air passageway conducting air from said primary air passageway upstream of said throttle valve means to said atomizer housing;
- an orifice disposed in said atomizer housing restricting the air flow through said atomizer housing;
- a circular fuel swirl chamber disposed in said atomizer housing adjacent to said orifice and concentric therewith, said fuel swirl chamber having a recessed inner surface;
- and
- means connecting the output port of said fuel delivery means with said fuel swirl chamber for injecting said quantity of fuel into said fuel swirl chamber tangential to its inner surface to form a fuel ring therein.
10 more elements
An improved air assisted fuel atomizer for a liquid fuel consuming device comprising:
- a conduit having a pressure differential thereacross for conducting an air flow to the device said conduit including throttle means for controlling the quantity of air flowing therethrough;
- an atomizer housing centrally disposed in said conduit downstream from said throttle means;
- a secondary air passageway having one end receiving air at a pressure greater than the pressure at the end of said conduit connected to the device for conducting air to said atomizer housing;
- an orifice disposed in said housing to restrict the air flow received from said secondary air passageway through said air chamber;
- a fuel swirl chamber disposed in said housing adjacent to said orifice and concentric therewith;
- fuel delivery means for supplying a predetermined quantity of fuel under pressure at an output port;
- and
- a fuel passageway connecting the output port of said fuel delivery means with said fuel swirl chamber, said fuel passageway injecting said fuel into said fuel swirl chamber tangential to said inner surface thereof to form a fuel ring therein.
5 more elements
Dependencies are inferred from the claim text.