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.
Claims21
A throttle body, comprising:
- a body having a main bore from which a fuel and air mixture is discharged for use by an engine;
- 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
- 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.
A throttle body, comprising:
- a body having a main bore from which a fuel and air mixture is discharged for use by an engine and a fuel passage leading to the main bore to provide fuel into the main bore;
- a throttle valve head carried by the body and moveable between an idle position and a wide open position to control at least some fluid flow through the main bore;
- a boost venturi having an inlet open to the main bore at a location downstream of the throttle valve head, an outlet open to the main bore and a passage extending between the inlet and outlet;
- and
- a flow directing feature associated with the throttle valve 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 inlet, and the fuel passage opens into the boost venturi passage so that fuel from the fuel passage is mixed with air flowing through the boost venturi passage and then discharged from the outlet into the main bore for mixing with air in the main bore.
A throttle body, comprising:
- a body having a main bore from which a fuel and air mixture is discharged for use by an engine and a fuel passage leading to the main bore to provide fuel into the main bore;
- a throttle valve head carried by the body and movable between an idle position and a wide open position to control at least some of the fluid flow through the main bore;
- and
- a flow directing feature associated with the throttle valve to alter at least one of the velocity or direction of at least a portion of the fluid that flows in the main bore relative to the main fuel outlet so that fuel from the main fuel outlet is mixed with air flowing through the main bore.
Dependencies are inferred from the claim text.