US 7,549,618 B1 · Straight bore butterfly valve carburetor with accelerator assist module

Abstract

A straight bore butterfly valve carburetor with accelerator assist module includes a butterfly valve carburetor with a straight bore and a vacuum accelerator assist module. The butterfly valve carburetor with a straight bore includes a substantially straight bore intake chamber. The venturi in the intake chamber is eliminated. The vacuum accelerator assist module includes two housing halves, a diaphragm and means for biasing the diaphragm into the fuel chamber. The diaphragm creates a vacuum chamber and a fuel chamber. The vacuum chamber communicates with the substantially straight bore intake chamber and the fuel chamber communicates with a fuel metering chamber of the carburetor. A vacuum is applied to the diaphragm at engine idle, which overcomes the means for biasing. When the butterfly valve is opened, the vacuum collapses and fuel is feed into the substantially straight bore intake chamber to increase engine speed.

Claims20

Dependent claims

A butterfly valve carburetor having a substantially straight bore intake chamber in combination with an accelerator assist module, comprising:

a first housing half and a second housing half, each said housing half including a cavity;
a diaphragm being retained between said first and second housing halves, said diaphragm creating a first chamber and a second chamber;
and
means for biasing said diaphragm into said second chamber, wherein, said first chamber communicating with said substantially straight bore intake chamber of said butterfly valve carburetor, said second chamber communicating with a fuel metering chamber of said butterfly valve carburetor.

1 more element

Dependencies are inferred from the claim text.

Straight bore butterfly valve carburetor with accelerator assist module

Life of this patent

Straight bore butterfly valve carburetor with accelerator assist module

Life of this patent

Abstract

Claims20