Throttle body with fluid flow control
AssigneeWalbro Corporation
InventorsGary J. Burns, William E. Galka, Bradley J. Roche, Albert L. Sayers, David L. Speirs
Life of this patent
Estimating the term…
Abstract
A throttle body may have a main bore for supplying a fuel and air mixture to an engine. A throttle valve head may be received in the main bore and movable between idle and wide open positions to control fluid flow through the main bore. A main fuel outlet and a boost venturi may open to the main bore and a flow directing feature may alter the velocity and/or direction of fluid flow in the main bore relative to the fuel outlet or boost venturi. The flow directing feature may be carried by the body, the throttle valve head, or the boost venturi.
Claims19
A throttle body, comprising:
- a body having a main bore from which a fuel and air mixture is discharged for use by an engine, the main bore having an inlet side into which air flows into the main bore and an outlet side from which air and fuel exit the main bore;
- a throttle valve head carried by the body and moveable between an idle position and an open position to control at least some fluid flow through the main bore;
- a boost venturi open to the main bore and arranged between the throttle valve and the outlet side of the main bore;
- and
- a flow directing feature to alter at least one of the velocity or direction of at least a portion of the fluid that flows in the main bore and relative to the boost venturi, the flow directing feature being carried by the body separate from the throttle valve and boost venturi.
A throttle body, comprising:
- a body having a main bore from which a fuel and air mixture is discharged for use by an engine, the main bore having an inlet side into which air flows into the main bore and an outlet side from which air and fuel exit the main bore;
- a throttle valve head carried by the body and moveable between an idle position and an open position to control at least some fluid flow through the main bore;
- a boost venturi open to the main bore and arranged between the throttle valve and the outlet side of the main bore;
- a flow directing feature to alter at least one of the velocity or direction of at least a portion of the fluid that flows in the main bore and relative to the boost venturi, the flow directing feature being carried by the body separate from the throttle valve and boost venturi;
- and
- a tube extending from the main body to the boost venturi and defining a fuel passage having a fuel outlet within the boost venturi, wherein the tube extends into an inner passage of the boost venturi, with at least one port formed in the tube between opposite ends of the tube, with fuel flowing through the port and into the inner passage.
Dependencies are inferred from the claim text.