Throttle body and plate
AssigneeArctic Cat Inc.
InventorOle Tweet
Life of this patent
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Abstract
A throttle valve assembly is held within a passageway in a throttle body. The assembly includes a plate and a pivot shaft. The pivot shaft extends through the mounting receptacle and engages with the throttle body. A method of making a series of throttle bodies includes molding multiple like bodies having first and second passageway portions. The first portions are sized to receive butterfly valves of a standard size. The second portions, positioned downstream from the first portions, have cross sectional openings equal to or smaller than the first portions. The second portions are machined or molded to various sizes adapted to flow fluid into the in-take ports of various size engines.
Claims21
A throttle body to control fluid flow to an intake port of an internal combustion engine, the throttle body comprising:
- a. a molded body having a passageway including first and second portions, said first portion having an opening at least as large as said second portion, said second portion being formed such that it is sized to the intake port;
- and
- b. a plate valve pivotally secured within said first portion.
A method of making a throttle body to control fluid flow to an intake port of an internal combustion engine comprising:
- a. molding a body having a passageway including a first portion sized to receive a butterfly valve therein and a second portion having a cross sectional area no larger than said first portion downstream from said first portion;
- and
- b. forming said second portion to a size adapted to flow fluid into the intake port.
A method of making a series of throttle bodies for various internal combustion engine sizes comprising:
- a. molding like bodies having passageways including first portions sized to receive butterfly valves of a standard size therein and a second portion having a cross sectional area no larger than said first portion downstream from said first portion;
- and
- b. forming said second portions to various sizes adapted to flow fluid into the intake ports of the various sized engines.
A method of making a series of throttle bodies for various internal combustion engine sizes comprising:
- a. providing a mold with a standard outer shape and a passageway first portion to form the throttle bodies;
- b. placing a first pin within said mold to form a passageway second portion sized to fit a particular first engine;
- c. molding a first throttle body with a flowable material;
- d. removing the throttle body from the mold;
- e. placing a second pin within the mold to form a passageway second portion sized to fit a particular second engine;
- f. molding a second throttle body with a flowable material;
- and
- g. removing the second throttle body from the mold.
Dependencies are inferred from the claim text.