Fuel injection throttle body

Patent · Tue Mar 11 04:00:00 EST 1986

OSTI ID:5688164

Jones, C; Clemens, W J

This patent describes an engine air/fuel throttling body having an induction passage open at an air inlet end and connected to the engine intake manifold at the opposite end, a throttle valve mounted for a rotatable movement across the passage to control flow therethrough, a fuel injector mounted above the air inlet for the spray of fuel thereinto, and a variable flow area, convergent-divergent (C-D) plug and nozzle assembly in the passage beneath the injector for increasing the air velocity to atomize the fuel. The assembly includes a plug member having a fuel deflecting surface beneath the injector and a nozzle member surrounding and cooperating with the plug member defining a minimum cross-sectional throat area therebetween. The C-D flow area increases the velocity of the air at the throat area to shear the fuel from the adjacent plug surface to thereby atomize the fuel. One of the members is movable relative to the other by the air flow there against at higher engine air flow rates and alternatively by engine vacuum at lower engine air flow rates to a self-regulating position providing essentially a constant air velocity to the air flowing through the throat area.

• Assignee: Ford Motor Co., Dearborn, MI
• Patent Number(s): US 4574760
• OSTI ID: 5688164
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
AIR FLOW
ATOMIZATION
CLOSURES
DESIGN
ENGINES
FLOW RATE
FLUID FLOW
FUEL INJECTION SYSTEMS
FUEL SYSTEMS
FUEL-AIR RATIO
GAS FLOW
HEAT ENGINES
INDUCTION
INTERNAL COMBUSTION ENGINES
MOTION
NOZZLES
POSITIONING
ROTATION
SPRAYS