US 5,879,594 AGranted

Temperature responsive pressure splitter

OwnerBarry L. Holtzmaninventor

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Abstract

A pressure splitter is made having a series or orifices, at least one of which has its effective size change with changes in temperature. This size change is provided by using materials with different thermal expansion rates, these different rates changing the relative positions of a body and the free end of a temperature responsive member. This same principle can be used in conjunction with a pressure responsive element, such as a sealed bellows, to provide a splitter which has an intermediate pressure which changes in response to both temperature and pressure. A splitter with temperature compensation only can be used to effectively modify carburetor fuel flow providing a more constant fuel/air ratio. A splitter using both temperature and pressure responsive elements can be used to more effectively maintain carburetor fuel/air ratio over a wide range of relative air densities caused by changes in atmospheric temperature and altutude.

Claims12

Dependent claims

A pressure splitter, said pressure splitter including:

a body,
an inlet with a first pressure P1,
an outlet with a second pressure P2,
a system of orifices between said inlet and said outlet,
an intermediate pressure P3 existing in a region between two said orifices,
an intermediate pressure sensing port to access said intermediate pressure P3,
at least one said orifice being a temperature responsive orifice with a variable effective area,
said temperature responsive orifice having a temperature responsive means,
said temperature responsive means including a temperature responsive member joined at a predetermined point to said body,
said body having a thermal expansion rate,
said temperature responsive member having a thermal expansion rate,
said body thermal expansion rate and said temperature responsive member thermal expansion rate being operationally different,
whereby said body and said temperature responsive member move relatively in response to temperature changes,
whereby said effective area of said temperature responsive orifice changes in response to temperature changes,
thereby changing said intermediate pressure P3 in response to temperature.

12 more elements

Dependencies are inferred from the claim text.