Carburetor fuel feed system with bidirectional passage
OwnerJames S. Jonesinventor
Life of this patent
Estimating the term…
Abstract
An improved carburetor is provided wherein a bidirectional passage is provided between an air velocity reader and a location downstream of a throttle. Metered fuel flows into the bidirectional passage adjacent the air velocity reader. Flow direction in the bidirectional passage is dependent on the pressure relationship between the ends of the bidirectional passage.
Claims12
In a carburetor having an air inlet, an outlet, throttling means for controlling the flow through a main air path, and a venturi for reading air velocity through the carburetor located between the throttling means and the air inlet, the improvement comprising a bidirectional passage between the venturi and an area downstream of the throttling means for allowing free movement of air either from the venturi to the area downstream of the throttling means or from the area downstream of the throttling means to the venturi, the direction of air movement being dependent on the pressure relationship between the venturi and the area downstream of the throttling means, and having means for receiving metered fuel into the bidirectional passage and allowing metered fuel to blend with air moving through the bidirectional passage and meet with the main air path either at the area downstream of the throttling means or at the venturi, wherein the means for receiving metered fuel comprises a tubular section extending into the bidirectional passage adjacent the venturi and providing a confined area of high velocity where fuel meets with air when the flow is from the venturi to the area downstream of the throttling means.
A carburetor comprising an inlet, an outlet, throttle means for controlling the flow through a main air path, a primary venturi and primary venturi amplifying means between the inlet and the throttle means, the primary venturi amplifying means being a secondary venturi upstream of, but extending into the throat of the primary venturi, a bidirectional passage between the primary venturi amplifying means and an area between the throttling means and the outlet, and means for receiving metered fuel comprising a tubular section extending into said bidirectional passage adjacent the primary venturi amplifying means and defining a confined area of high velocity within the bidirectional passage where fuel meets with air when the flow is in the direction from the primary venturi amplifying means to the area below the throttling means.
Dependencies are inferred from the claim text.