"Integrated Gas Nozzle Check Valve and Engine Using Same" in Patent Application Approval Process (USPTO 20150377184)
By a News Reporter-Staff News Editor at Politics & Government Week -- A patent application by the inventors Poapdiuc, Ovidiu Petru (
, Nicholas Denman
), filed on June 25, 2014, was made available online on January 7, 2016, according to news reporting originating from
, by VerticalNews correspondents.
This patent application has not been assigned to a company or institution.
The following quote was obtained by the news editors from the background information supplied by the inventors: "With the growing abundance of natural gas, there has been a tendency in the engine industry to modify existing diesel engines or create new dual fuel engines with the capability of burning both natural gas and distillate diesel fuel. When operating in a dual fuel mode, a gaseous fuel charge is supplied to the engine cylinder by moving gaseous fuel through a metering valve and a gas supply nozzle into the engine cylinder. The gaseous fuel charge may then be ignited by compression igniting diesel fuel directly injected into the injection cylinder. When operating in a single fuel mode, the engine operates with only diesel fuel. Especially when the engine is operating in a diesel fuel mode, there may be a risk of back flow of gases and contaminants from the engine cylinder back toward the gas metering valve. These issues may be further exacerbated in the case of dual fuel two stroke engines of the type sometimes utilized in the locomotive industry.
"The present disclosure is directed toward one or more of the problems set forth above."
In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventors' summary information for this patent application: "In one aspect, an internal combustion engine includes a housing that defines at least one cylinder. A piston is positioned to reciprocate in the cylinder. A gaseous fuel supply system includes a metering valve fluidly positioned between a source of gaseous fuel and a gas supply nozzle assembly, which includes an outlet that opens into the cylinder. A liquid fuel supply system includes a source of liquid fuel fluidly connected to a fuel injector with a spray tip positioned in the cylinder. The gas supply nozzle assembly includes a check valve attached between a main body, which is attached to the metering valve, and an end nozzle fluidly connected to the cylinder. The check valve is movable between an open position to permit flow of gaseous fuel into the cylinder, and a closed position to prevent fluid flow from the cylinder into the main body.
"In another aspect, a nozzle assembly for port injection of gaseous fuel into a cylinder of an engine includes a main body with a funnel shape that has a large area inlet for attachment to a gas metering valve and a small end. A main body has a centerline that curves through an angle greater than zero. An end nozzle defines a gas passage extending between an inlet and a discharge end. A check valve is clamped between the small end of the main body and the inlet end of the end nozzle, and is biased closed to block flow from the end nozzle into the main body, but opening responsive to a pressure differential to permit flow from the main body into the end nozzle.
"In another aspect, a method of operating the engine includes supplying gaseous fuel to a cylinder by opening a metering valve and a check valve. The supply of gaseous fuel is ended by closing the metering valve. Reverse flow of fluid from the cylinder into the main body of a nozzle assembly is prevented by closing the check valve.
BRIEF DESCRIPTION OF THE DRAWINGS
"FIG. 1 is a schematic view of an engine according to the present disclosure;
"FIG. 2 is an exploded view of a gas supply nozzle assembly for the engine of FIG. 1;
"FIG. 3 is a sectioned side view of the gas supply nozzle assembly of FIG. 2;
"FIG. 4 is a perspective sectioned view of the check valve from the gas supply nozzle assembly of FIG. 3;
"FIG. 5 is a side view of an alternative asymmetric check valve according to another aspect of the present disclosure;
"FIG. 6 is a side view of a cross slit version of a check valve according to another aspect of the present disclosure;
"FIG. 7 is a perspective sectioned view of the check valve of FIG. 6;
"FIG. 8 is a sectioned side view of still another alternative check valve according to the present disclosure in an open position;
"FIG. 9 is a sectioned side view of the check valve of FIG. 8 and its closed position;
"FIG. 10 is a sectioned side view of a butterfly type check valve according to another aspect of the present disclosure; and
"FIG. 11 is a sectioned side view of a split disk check valve according to another aspect of the present disclosure."
URL and more information on this patent application, see: Poapdiuc, Ovidiu Petru;
, Nicholas Denman
. Integrated Gas Nozzle Check Valve and Engine Using Same. Filed June 25, 2014 and posted January 7, 2016. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=5346&p=107&f=G&l=50&d=PG01&S1=20151231.PD.&OS=PD/20151231&RS=PD/20151231
Keywords for this news article include: Energy, Patents, Oil & Gas, Diesel Fuel, Liquid Fuel, Natural Gas.
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