Throttle body assembly
AssigneeFitech Fuel Injection
InventorKam Pui Koo
Life of this patent
Estimating the term…
Abstract
A throttle body assembly that includes a throttle body defining a primary air passage for an air intake system of an automobile. A valve is located in the primary air passage and is moveable along a travel path between a closed position, wherein an air flow through the primary air passage is blocked, and an open position, wherein the air flow can travel through the primary air passage. The open position includes a plurality of positions along a scale between a minimum amount of openness and a maximum amount of openness and a greater air flow rate corresponds to a larger amount of openness. A limiter is located in the primary air passage adjacent to the valve and reduces the relationship between openness and the corresponding flow rate for a portion of the travel path.
Claims20
A throttle body assembly comprising:
- a throttle body having at least one interior wall extending along an axis to define at least one primary air passage for guiding an air flow;
- a valve disposed in the at least one primary air passage and including a valve plate delimited by a pair of opposing edges disposed in an aligned relationship and also in close proximity to the interior wall in a closed position to block substantially all of the air flow through the at least one primary air passage;
- the valve plate pivotable from the closed position towards an open position to move the pair of opposing edges along a travel path and into a spaced relationship with the interior wall to allow air flow through the at least one primary air passage;
- a limiter extending from the interior wall into the at least one primary air passage to define a contour surface extending along a portion of the travel path of one of the pair of opposing edges to reduce air flow between the respective opposing edge and the interior wall during an initial movement of the valve plate from the closed position towards the open position;
- and
- wherein the degree of pivoting along the travel path of the valve plate directly corresponds to a resulting RPM in a provided engine and the limiter is configured to form a linear relationship between the degree of pivoting along the travel path and the resulting RPM.
Dependencies are inferred from the claim text.