Carburetor fuel feed system with bidirectional passage

Patent · Tue Dec 30 04:00:00 EST 1986

OSTI ID:7050365

Jones, J S

This patent describes 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 described here comprises 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 is dependent on the pressure relationship between the venturi and the area downstream of the throttling means. A means is included 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. 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.

• Assignee: NOV; NOV-87-041308; EDB-87-055225
• Patent Number(s): US 4632788
• OSTI ID: 7050365
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
AUTOMOTIVE FUELS
CARBURETORS
ENGINES
FLOW RATE
FLUID FLOW
FUEL SYSTEMS
FUEL-AIR RATIO
FUELS
GAS FLOW
HEAT ENGINES
INTAKE STRUCTURES
INTERNAL COMBUSTION ENGINES
MECHANICAL STRUCTURES
METERING
MIXING
PRESSURE DEPENDENCE
VENTURI TUBES