Internal combustion engine
AssigneeFord Motor Company
InventorWilfred T. Oliver
Life of this patent
Estimating the term…
Abstract
A carburetor has a small air passage connected to the main induction passage by a sonic flow orifice; the small passage being supplied with compressed air at all times at a pressure and volume maintaining sonic flow; a fuel supply line is connected to the orifice for a constant flow of fuel, the rate of flow being varied as a function both of throttle valve position and manifold vacuum level.
Claims12
A carburetor having an air/fuel induction passage open to air at one end and connected at its opposite end to the intake manifold of an internal combustion engine to be subject to the manifold vacuum therein for the flow of an air/fuel mixture thereinto, a throttle valve in the passage movable between positions opening and closing the passage, an additional air passage having a discharge portion open to the induction passage on the manifold side of the throttle valve and connected at its inlet end to a compressed air source of a capacity providing a pressure in the air passage higher than the maximum manifold pressure by a critical value sufficient to maintain air flow through the air passage at sonic velocity at all times during engine operation, and a fuel supply line connected to the air passage for the induction of a continuous supply of fuel therefrom into the air passage irrespective of the position of the throttle valve, the air passage comprising a flow restricting orifice, the throttle valve having additional means thereon movable into and out of the discharge end of the air passage upon predetermined movement of the throttle valve to vary the orifice size and flow volume as a function of throttle valve movement.
A carburetor having a cylindrical air/fuel induction passage open to air at one end and connected at its opposite end to the intake manifold of an internal combustion engine to be subject to the change in manifold vacuum therein for the flow of an air/fuel mixture thereinto, the passage being defined by lower and upper cylindrical portions, the upper portion being of larger diameter, the lower portion containing a hollow cylindrical axially slidable throttle valve open at its ends, the upper cylindrical portion having a central axially extending partition therein terminating short of the junction between the cylindrical portions to define a path for the flow of air between the portions, the throttle valve being axially movable between a closed passage position wherein the throttle valve edge abuts the partition to block air flow between portions and open passage positions permitting the air flow, the partition containing an additional air passage connected at one end to a compressed air source and at its other end at all times to the induction passage and manifold through the open ends of the throttle valve, the additional air passage containing a flow restricting orifice, the compressed air source being of a capacity providing a pressure in the air passage higher than the maximum manifold pressure by a critical value sufficient to maintain air flow through the orifice at sonic velocity at all times, and a fuel supply line connected to the orifice for the induction of a continuous supply of fuel into the orifice and out into the induction passage regardless of the position of the throttle valve.
Dependencies are inferred from the claim text.