Exhaust gas recirculating valve

Claim 2

In an internal combustion engine that uses the compressing of a fuel-air mixture comprising an exhaust manifold means, intake manifold means and carburetor means, exhaust gas recirculating means for regulating the flow of a portion of the exhaust gases from the exhaust manifold to the intake manifold in automatic self-response to atmospheric pressure, intake manifold pressure and exhaust manifold pressure, so as to reduce the formation of pollutants formed within the internal combustion engine, the improvement wherein said recirculating means includes an exhaust gas recirculating valve being open to fresh air from the carburetor means and having plate valve means for controlling the flow of the exhaust gases and/or fresh air, and terminate flow of exhaust gas to the carburetor means during selected modes of engine operation.

Claim 3

The arrangement of claim 1 wherein the recirculating means includes a velocity nozzle for intRoducing fresh air and exhaust gases into the intake manifold and for scavenging the crank case gases of the internal combustion engine.

Claim 4

The arrangement of claim 2 wherein said exhaust gas recirculating valve is disposed between the intake manifold means and the exhaust manifold means.

Claim 5

The arrangement of claim 2 wherein said exhaust gas recirculating valve is disposed between the intake manifold means and the exhaust pipe means.

Claim 6

The arrangement of claim 2 wherein said exhaust gas recirculating valve is disposed between the intake manifold means and the heat riser means.

Claim 7

The arrangement as in claim 1 wherein the internal combustion engine includes a PCV valve and the velocity nozzle is disposed between the intake manifold, the PCV valve and the exhaust gas recirculating valve.

Claim 8

The arrangement of claim 6 wherein the exhaust gas recirculating valve includes a separator plate having openings therethrough and said recirculating valve including outlet to the intake manifold means, said plate valve means movable within said exhaust gas recirculating valve so as to control flow through said openings in said separator plate and said outlet.

Claim 9

The arrangement as in claim 7 wherein a metering orifice is provided in the plate valve means, said metering orifice permitting controlled flow even though the plate valve means is closing the said intake manifold means outlet.

Claim 10

The arrangement as in claim 7 wherein a metering orifice is provided in the plate valve means, the area of said metering orifice being a function of engine displacement.

Claim 11

The arrangement as in claim 1 wherein the exhaust gas recirculating valve includes a separator plate having openings therethrough, an inlet from the carburetor means, an outlet to the intake manifold means, and an inlet from the exhaust manifold means, said valve movable within said exhaust gas recirculating valve between said separator plate and said outlet to the intake manifold means, and guide means in said exhaust gas recirculating valve for guiding movement of said plate valve means toward and away from the separator plate and said outlet to the intake manifold means, respectively.

Claim 12

The arrangement as in claim 10 wherein the guide means comprise pins extending substantially perpendicularly to the separator plate and outlet.

Claim 13

The arrangement as in claim 10 wherein the guide means comprise projections in the exhaust gas recirculating valve disposed about the plate valve means and cooperating with the periphery thereof.

Claim 14

The arrangement as in claim 1 wherein the exhaust gas recirculating valve includes a separator plate having openings therethrough an inlet from the carburetor means, an outlet to the intake manifold means and an inlet from the exhaust manifold means, and two plate valves disposed in the exhaust gas recirculating valve for controlling flow therethrough.

Claim 15

The arrangement as in claim 13 wherein the two plate valves are disposed between the separator plate and the outlet to the intake manifold means.

Claim 16

The arrangement as in claim 13 wherein the two plate valves are disposed on opposite sides of the separator plate.

Claim 17

The arrangement as in claim 15 wherein a first plate valve is between the separator plate and the intake manifold means outlet and a second plate valve is between the separator plate and inlet from the carburetor means, and the chamber formed between the separator plate and exhaust gas recirculating valve body containing the first plate valve communicates with the exhaust manifold means inlet.

Claim 18

The arrangement as in claim 16 wherein the first plate valve has a metering orifice to permit flow therethrough when the first plate valve is seated closing said outlet to said carburetor means.

Claim 19

The arrangement as in claim 16 wherein the area of the metering orifice is a function of the displacement of the internal combustion engine.

Claim 20

The arrangement as in claim 6 wherein the velocity nozzle includes a body having a passage therethrouGh communicating at one end with the PCV valve and at the other end with the intake manifold means, and an induction inlet communicating with the outlet to the intake manifold means in the exhaust gas recirculating valve, with the flow through the induction inlet into the said passage in the velocity nozzle inducing a low pressure in the PCV system to help scavange emissions from the crank case of the internal combustion engine.

Claim 21

In an engine that uses the compressing of a fuel-air mixture comprising exhaust manifold means, intake manifold means, and fuel induction means, exhaust gas recirculating means for regulating the flow of a portion of the exhaust gases from the exhaust manifold means to the intake manifold means in automatic self-response to atmospheric pressure, intake manifold pressure, and exhaust manifold pressure, so as to reduce the formation of pollutants including oxides of nitrogen formed within the engine, characterized by said exhaust gas recirculating means including a body with a first passage communicating with the fuel induction means, a second passage communicating with the intake manifold and a third passage communicating with the exhaust manifold, said recirculating means controlling the flow of the exhaust gases and/or fresh air, and terminating flow of exhaust gases to the fuel induction means during selected modes of engine operation, a separator plate having openings therethrough in said body, and plate valve means movable within said body, so as to control flow of exhaust gases and fresh air through said body, and guide means in said body for guiding movement of said plate valve means.

Claim 22

In an engine that uses the compressing of a fuel-air mixture comprising exhaust manifold means, intake manifold means, and fuel induction means, exhaust gas recirculating means for regulating the flow of a portion of the exhaust gases from the exhaust manifold means to the intake manifold means in automatic self-response to atmospheric pressure, intake manifold pressure, and exhaust manifold pressure, so as to reduce the formation of pollutants including oxides of nitrogen formed within the engine, characterized by said exhaust gas recirculating means including a body with a first passage communicating with the fuel induction means, a second passage communicating with the intake manifold and a third passage communicating with the exhaust manifold, said recirculating means controlling the flow of the exhaust gases and/or fresh air, and terminating flow of exhaust gases to the fuel induction means during selected modes of engine operation, a separator plate having openings therethrough in said body, and plate valve means movable within said body, so as to control flow of exhaust gases and fresh air through said body, and guide means in said body for guiding movement of said plate valve means.

Claim 23

In an internal combustion engine that utilizes the compressing of a fuel-air mixture comprising an exhaust manifold means, intake manifold means, and carburetor means, exhaust gas recirculating means for regulating the flow of a portion of the exhaust gases from the exhaust manifold to the intake manifold in automatic self-response to atmospheric pressure, intake manifold pressure, and exhaust manifold pressure, so as to reduce the formation of pollutants including oxides of nitrogen formed within the engine, characterized by said exhaust gas recirculating means including an exhaust gas recirculating body with a first passage communicating with a carburetor means, a second passage communicating with the intake manifold, and a third passage communicating with the exhaust manifold, said exhaust gas recirculating means controlling the flow of the exhaust gases and/or fresh air, and terminating flow of exhaust gas to the carburetor means during selected modes of engine operation, said exhaust gas recirculating body including a separator plate having openings therethrough, and an opening communicating with the carburetor means, and an opening communicating with the intake manifold means and an opening communicating with the exhaust manifold means, and two plate valves disposed within the exhaust gas recirculating body for controlling flow therethrough.

Claim 24

In an internal combustion engine that utilizes the compressing of a fuel-air mixture comprising an exhaust manifold means, intake manifold means, and carburetor means, exhaust gas recirculating means for regulating the flow of a portion of the exhaust gases from the exhaust manifold to the intake manifold in automatic self-response to atmospheric pressure, intake manifold pressure, and exhaust manifold pressure, so as to reduce the formation of pollutants including oxides of nitrogen formed within the engine, characterized by said exhaust gas recirculating means including an exhaust gas recirculating body with a first passage communicating with a carburetor means, a second passage communicating with the intake manifold, and a third passage communicating with the exhaust manifold, said exhaust gas recirculating means controlling the flow of the exhaust gases and/or fresh air, and terminating flow of exhaust gas to the carburetor means during selected modes of engine operation, said exhaust gas recirculating body including a separator plate having openings therethrough, and an opening communicating with the carburetor means, and an opening communicating with the intake manifold means and an opening communicating with the exhaust manifold means, and two plate valves disposed within the exhaust gas recirculating body for controlling flow therethrough.

Claim 25

The arrangement as in claim 21 wherein the two plate valves are disposed on opposite sides of the separator plate and guide pins are disposed in the separator plate for guiding the movement of the two valve plates.

Claim 26

The arrangement as in claim 22 wherein the guide pins extend through complementary openings in one plate valve and cage the periphery of the other plate valve.

Claim 27

The arrangement of claim 6 wherein the internal combustion engine includes a carburetor and a distributor with a vacuum diaphragm, a vacuum advance line communicating the carburetor and vacuum diaphragm, and means for bleeding air into the vacuum advance line in order to retard the vacuum advance that would otherwise be obtained at a given speed of the internal combustion engine and help reduce formation of pollutants.

Claim 28

The arrangement of claim 20 including a distributor with a vacuum diaphragm and a vacuum advance line communicating the fuel induction means and the vacuum diaphragm, and orifice means for bleeding air from the atmosphere into the vacuum advance line to retard spark advance and help reduce formation of pollutants.

Claim 29

The arrangement as in claim 22 including a metering orifice provided in one plate valve, with an aligned opening in the other plate valve being of larger cross-section than said metering orifice, said other plate valve being of larger area than said one plate valve, whereby said other plate is more responsive to exhaust manifold pressure.