Compression ignition engine fumigation system

Patent · Tue Sep 22 00:00:00 EDT 1987

OSTI ID:5831929

Lowi, A Jr

This patent describes a variable area venturi apparatus for variably metering a constant proportion fumigation fuel/air mixture into a main air flow supplied to a compression ignition engine having an intake manifold. It consists of: a housing defining an inner surface and having an air intake port, an output port for being coupled to the intake manifold, a main passageway between the air intake port and the output port through which the main air flow to the engine occurs, and a branch port coupled for enabling the constant proportion fumigation fuel/air mixture to be drawn into the main passageway to be variably mixed with the main air flow; a variable restrictor means in the main passageway defining a variable area throat. The restrictor mean variably opening and closing to open and close the throat in response to air flow drawn through the main passageway by the engine for creating a variable pressure drop downstream of the throat. The branch port is positioned between the throat of the restrictor means and the intake manifold. The amount of constant proportion fumigation fuel/air mixture being drawn into the main passageway varies in response to the variable pressure drop to vary the proportion of fumigation fuel mixed with air supplied to the intake manifold.

• Assignee: NOV; NOV-87-083375; EDB-88-001621
• Patent Number(s): US 4694802
• OSTI ID: 5831929
• Resource Relation: Patent File Date: Filed date 21 Sep 1984
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
FUEL SYSTEMS
DESIGN
FUEL-AIR RATIO
METERING
INTERNAL COMBUSTION ENGINES
AEROSOLS
AIR FLOW
AUTOMOTIVE FUELS
COMPRESSION
IGNITION
MIXTURES
OPERATION
PRESSURE DEPENDENCE
RESPONSE FUNCTIONS
VAPORS
VENTURI TUBES
COLLOIDS
DISPERSIONS
ENGINES
FLUID FLOW
FLUIDS
FUELS
FUNCTIONS
GAS FLOW
GASES
HEAT ENGINES
SOLS
330100* - Internal Combustion Engines