US3844260A - Exhaust gas recirculating valve - Google Patents

Exhaust gas recirculating valve Download PDF

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Publication number
US3844260A
US3844260A US00302935A US30293572A US3844260A US 3844260 A US3844260 A US 3844260A US 00302935 A US00302935 A US 00302935A US 30293572 A US30293572 A US 30293572A US 3844260 A US3844260 A US 3844260A
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Prior art keywords
valve
exhaust
plate
exhaust gas
intake manifold
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US00302935A
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English (en)
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M Scott
F Wheeler
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Stp Corp
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Stp Corp
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Priority to US00302935A priority Critical patent/US3844260A/en
Priority to GB2073773A priority patent/GB1417081A/en
Priority to JP5543973A priority patent/JPS558666B2/ja
Priority to SE7314169A priority patent/SE404068B/xx
Priority to DE2353925A priority patent/DE2353925C3/de
Priority to IT53458/73A priority patent/IT996363B/it
Priority to FR7338963A priority patent/FR2205106A5/fr
Priority to CA184,692A priority patent/CA974832A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/59—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor
    • F02M26/61—Systems for actuating EGR valves using positive pressure actuators; Check valves therefor in response to exhaust pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/36—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with means for adding fluids other than exhaust gas to the recirculation passage; with reformers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/68—Closing members; Valve seats; Flow passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the exhaust system

Definitions

  • a single plate valve is provided in an improved exhaust gas recirculating valve, whereas in a second form, dual plate valves are used.
  • a velocity nozzle means for introducing the gases into the intake manifold and for helping to scavenge the PCV systems crank case emissions.
  • Cornelius U.S. Pat. No. 2,722,927 Another arrangement for reducing the pollutants discharged from an internal combustion engine is shown in Cornelius U.S. Pat. No. 2,722,927.
  • the Cornelius system introduces exhaust gases to the combustion chamber of an internal combustion engine to dampen out the surges normally resulting from the rapid opening and closing of the intake and exhaust valves. Exhaust gases are introduced only when required in order to effect maximum volumetric efficiency and at all other times the gases will pass out of the exhaust pipe.
  • This system is rather complex for it utilizes governors, diaphragms and associated linkages and does not effectively control the discharge of pollutants during all operating conditions of the internal combustion engine.
  • catalytic converters be employed in mufflers to help break down the pollutants before they are discharged to the atmosphere.
  • the pollutants are still found in the engine and in the event of malfunction would be discharged to the atmosphere. Further, such systems are relatively expensive.
  • An object of this invention is to provide an improved exhaust gas recirculating means that is relatively inexpensive to make and install on used automobiles or on new automobiles.
  • Another object of the present invention is to provide improved exhaust gas recirculating means that are compatible with engines incorporating PCV valves, such recirculating means including an improved EGR valve and a velocity nozzle means for introducing the gases and/or air into the intake manifold and for helping to scavenge the PCV systems crank case emissions.
  • Another object of this invention is to provide improved exhaust gas recirculating means for a vehicle that will reduce exhaust emissions from a motor vehicle engine without significantly adversely affecting vehicle performance.
  • Still another object is to provide improved exhaust gas recirculating means providing for fresh air intake during engine operation through a plate valve automatically self-responsive to the differential pressure of the atmosphere, the intake manifold, and the exhaust manifold for reducing oxides of nitrogen, and generally reducing hydrocarbons, carbon monoxide, aldehydes and hydrocarbon reactivity.
  • Yet another object of the present invention is to provide improved exhaust gas recirculating means embodying an EGR valve having dual plate valves therein for more precisely controlling the flow of exhaust gas and fresh air through the EGR valve.
  • FIG. 1 is a schematic view of an internal combustion engine incorporating the novel pollution control system of the present invention
  • FIG. 2 is an enlarged detailed view partly in cross section of the improved pollution control system of the present invention
  • FIGS. 3, 4 and 5 are detailed cross-sectional views illustrating various operational positions of the plate valve within a modified exhaust gas recirculating valve of the present invention
  • FIG. 6 is a plan view of the separator plate used in the exhaust gas recirculating valve of FIGS. 3-5;
  • FIG. 7 is a plan view of a typical plate valve utilized in the exhaust gas recirculation valve of FIGS. 3-5;
  • FIG. 8 is a cross-sectional view of a further embodiment of exhaust gas recirculating valve
  • FIG. 9 is a plan view of a secondary plate valve utilized in the embodiment of FIG. 8;
  • FIGS. 10, ll, 12 and 13 are cross-sectional views of the modified exhaust gas recirculation valve of FIG. 8, illustrating the positions of the dual plate valves during various modes of engine operation;
  • FIGS. 14, I5, l6, l7 and 18 are cross-sectional views of a further modification of the exhaust gas recirculating valve, illustrating various operational positions of the dual plate valves therein,
  • FIG. 19 is a cross-sectional view of the exhaust gas recirculating valve of FIG. 15 taken generally along the line l9l9;
  • FIG. 20 is a plan view of the separator plate of the modification of exhaust gas recirculating valve of FIGS. 14-13;
  • FIG. 21 is a cross-sectional view of the exhaust gas recirculating valve of FIG. 17 taken generally along the line 21-21,
  • FIG. 22 is a schematic view of an exhaust gas recirculating system for an internal combustion engine incorporating a vacuum advance bleed control means
  • FIG. 23 is a further modification of exhaust gas recirculating valve.
  • FIG. 1 there is illustrated an improved pollution control system for an internal combustion engine which embodies the present invention.
  • the internal combustion engine with which the pollution control device 12 of the present invention is used may be of conventional design and comprise an engine block 14 having a pan secured to the bottom thereof which cooperates with the block 14 to define a crank case chamber.
  • the usual pistons are operable within cylinders in the engine block 14 which is closed at the top by cylinder head 16a and valve cover means 16.
  • an intake manifold 18 that is operatively associated with the carburetor mechanism 20 and the usual air cleaner 22.
  • an exhaust manifold 24 which includes a conduit or pipe 26 adapted to communicate exhaust gases from the engine to a muffler mechanism (not shown) from which the gases may be discharged through a tailpipe to the atmosphere.
  • the intake and exhaust manifolds may be connected directly to the block 14 or to the head 16a.
  • the internal combustion engine 10 includes a distributor mechanism 30 that is adapted to be connected by means or electrical cable to the spark plugs 32 positioned in the cylinder head 16a.
  • the engine 10 may include a fly wheel and the other conventional accessories.
  • the noval pollution control system of the present invention includes in addition to the aforedescribed elements a velocity nozzle means 36 adapted to be connected to the PCV inlet between the carburetor and the intake manifold 18.
  • the velocity nozzle 36 is connected by means of the conduit 40 to the PCV valve of the internal combustion engine 10 and through the conduit 42 to the exhaust gas recirculation valve 12.
  • the present invention there is provided means for precisely controlling the amount of exhaust gas recirculated, by means of plate valve means that meters the flow of exhaust gases and/or ambient air in automatic selfresponse to the differential pressures of the exhaust manifold, the intake manifold and the ambient air pressure.
  • plate valve means that meters the flow of exhaust gases and/or ambient air in automatic selfresponse to the differential pressures of the exhaust manifold, the intake manifold and the ambient air pressure.
  • the body or housing 46 of the exhaust gas recirculation (EGR) valve 12 is connected to the exhaust gas manifold 24 or the heat riser 24a or the exhaust pipe 26 through a conduit 48.
  • the body 46 has a separator plate member 50 secured to the bottom thereof by means of fastening means, for example screws 52 which also retain an inlet coupling 54 to the body 46.
  • the inlet coupling 54 communicates with the carburetor air cleaner through the conduit 56.
  • the separator plate member 50 is provided with opening means, for example, holes 58, for communicating with the chamber 60 of the valve body 46.
  • An outlet coupling 62 in turn connects the valve body 46 to the conduit 42 that is connected to the velocity nozzle 36.
  • plate valve member Disposed within the chamber 60 is plate valve member that is adapted to alternately cooperate with the ports 58 and conduit valve seat 61 to precisely regulate the flow of fresh air and exhaust gases into the pollution control system.
  • Guide means 72 guide the movement of the plate valve 70 toward and away alternately from the ports 58 in the separator plate 50 and the conduit valve seat 61.
  • the guide means 72 may take the form of pins secured to the separator plate 50 and disposed in openings within the plate valve 70, such that the plate valve 70 can slide on the pins 72 with a minimum of friction.
  • FIG. 3 the same cycle takes place with fresh air mixed with exhaust gases entering the intake manifold 18 and fresh air entering the exhaust gas manifold 24.
  • fresh air entering the exhaust manifold 24 also helps oxidize the unburnt hydrocarbons (HC) and carbon monoxide (CO), while the exhaust gases mixing with fresh air entering the intake manifold 18 give better vaporization and help reduce oxides of nitrogen.
  • HC unburnt hydrocarbons
  • CO carbon monoxide
  • the positive pulses overcome the negative pulses in the exhaust manifold. Therefore, there is no fresh air drawn into the recirculating valve.
  • the intake manifold 18 draws only exhaust gases through the metering hole 71 in plate valve 70 and exhaust gases also escape through the holes 58 and pass through the conduit 56 through the carburetor air cleaner. These exhaust gases reduce the oxides of nitrogen.
  • the plate valve 70 is set 58in the separator plate 50 via the conduit 48 into the exhaust gas manifold 24 where it enters the cylinder during exhaust valve overlap, thereby reducing the dilution of the air-fuel mixture by exhaust gases and thus creating better combustion and reducing all emissions.
  • the continued pulsation of the plate valve keeps the valve seat at the bottom of conduit 61 and the metering holes 71 in the plate valve 70 clean. Only filtered air enters the EGR valve 12 from the carburetor air cleaner 22 via the coupling 54.
  • the plate valve 70 is controlled by the differential in exhaust manifold, intake manifold, and ambient pressures to properly and precisely control the flow of exhaust gases and fresh air introduced when needed.
  • the plate valve 70 is automatically responsive to the pressures acting on the surfaces thereof.
  • An advantage of the system utilizing the EGR valve of the present invention is that the need for solenoids, idle control valve and associated linkage, as is used in a prior known exhaust gas emission control system can be eliminated.
  • the plate or reed valve 70 is so designed that during deceleration, fresh air is drawn into the EGR valve 12. This fresh air is not diluted with exhaust gases because fresh air is also entering the exhaust manifold. The fresh air enters the intake manifold metered by the control hole or orifice 71 in the plate 70 and then passes through the recirculation conduit 42 and the velocity nozzle to the carburetor 20, thereby accomplishing the same metering action that the solenoid control valve or deceleration valve prior known systems accomplish, in a much simplified fashion.
  • the solenoid control valve of one prior system holds the butterfly of the carburetor partially open, allowing more air to enter the intake manifold and thus reducing the over-rich mixture by reducing the vacuum on the idle circuit and thus lowering the emissions.
  • this solenoid valve sometimes sticks, thereby holding the throttle partially open.
  • There was a major automotive recall by one of the automotive manufacturers because the bracket holding this valve was defective, causing the throttle to stick partially open.
  • This problem is obviated in the present invention in that if the exhaust recirculating valve 12 fails, the engine will only idle rough, but the throttle will not stick nor will the engine race due to malfunction of the plate valve 70. Even if the valve 12 is rendered completely inoperative, the engine 10 will not race, rather, it will tend to stall due to the off-balanced fuel-air ratio caused by the excess air entering the intake manifold 18.
  • the elapese time is longer than for an engine not equipped with an EGR valve 12 in accordance with the present invention.
  • the reason for this is that fresh air drawn through the plate valve 70 enters the intake manifold 18 through a suitable opening in the intake manifold or an induction plate secured between the carburetor and intake manifold, thus simulating a partial throttle opening.
  • the air becomes diluted with exhaust gases, thus simulating a closed throttle condition and normal idle speeds are maintained.
  • the velocity nozzle 36 comprises a generally L-shaped body 80 which is connected at one end to a coupling 81 that is in turn connected to conduit 40. Conduit 40 is adapted to be secured to the outlet from the PCV valve 34. Fitting 82 is connected to the body 80 at an angle to the coupling conduit 81. Extending inwardly from the fitting 82 is an induction conduit 84. The cross-sectional area of the passage in conduit 84 must be less than the cross-sectional area of the passage in body 80.
  • the said area of the passage in conduit 84 is used to meter the exhaust gas recirculating flow when the plate valve 70 is away from the valve seat on the end of conduit 61.
  • the length of the passage in conduit 84 must be no less than twice the diameter of said passage.
  • FIG. 8 there is illustrated a further modification of the EGR valve of the present inventio.
  • the EGR valve 12' of FIG. 8 is essentially like the valve of FIGS. 2-5 except that it incorporates a dual plate valve construction.
  • valve 70 there is provided a valve 69.
  • plate valve 69 is very much like the valve plate 70 except that the hole 68 in the center thereof is larger than the hole 71 in the plate 70 and the outer diameter of valve plate 69 is larger than that of plate valve 70.
  • Both valves 69 and 70 are guided by suitable guide means for movement toward and away from openings 58 in the separator plate and conduit 61 as for example, by the guide pins 72.
  • the dual plate valve unit 12 shown in FIG. 8 operates in substantially the same manner as the single valve unit shown in FIGS. 2-5 except that at high speed cruise operation, as shown particularly in FIG. 12, plate valve 69 is pressed tightly against the separator plate 50, closing the openings 58 to fluid flow, namely the exhaust gas and/or air.
  • the plate valve member 69 is slightly larger in area than the plate valve member 70 and has a larger hole 68 in the center thereof, which reduces the vacuum effect, thus making the plate valve 69 more responsive to exhaust pressure.
  • the exhaust pressure forces the plate valve 69 tightly against the separator plate 50, thus increasing the pressure between the plate valves 69 and 70, which in turn forces more exhaust gases through the metering hole 71 in the plate valve 70. This provides more exhaust gas recirculation under the carburetor and less through the air cleaner 22, thus eliminating the reduction in volumetric efficiency caused by recirculating hot gases into the carburetor inlet.
  • FIG. 10 discloses the positions of the valve plates 69 and 70 during the idle mode and deceleration mode of operation.
  • FIG. 11 illustrates the position of the valves 69 and 70 during the acceleration mode of operation.
  • FIG. 12 shows the valves 69 and 70 during the high speed cruise mode of engine operation.
  • FIG. 13 indicates the position of the valves at the low speed cruise mode of operation.
  • exhaust gas recirculating valve can be mounted on the exhaust manifold, the heat riser or the header pipe. Exhaust gas should enter the EGR valve from the exhaust manifold, heat riser, or exhaust pipe.
  • FIGS. 14-21 there is illustrated an improved form of exhaust gas recirculating valve.
  • the structure of the valve 112 is very much like that of the valve 12 except that the two disc or plate valves 169 and 170 are disposed on opposite sides of the separator plate 150, whereas in the embodiment of FIG. 10-12 the dual plates 69 and 70 are on the same side of the separator plate.
  • FIG. 14 there is illustrated the position of the components during the idle mode of operation.
  • the plate valve 169 is seated tight against the seat at the end of the conduit 161 and the plate or poppet valve 170 is up against the separator plate 150, such that there is a full flow of fresh air from the conduit 156, through the inlet portion 154 and the ports 158 in the separator plate 150.
  • Some of the fresh air will pass through the metering orifice 168 in the plate valve 169 and flow through the conduit 161 to the pressure nozzle 36 from which it ends up in the intake manifold 18.
  • FIG. 15 there is illustrated the position of the plate valves 169 and 170 during the acceleration mode of engine operation.
  • the exhaust gases force the plate valve 169 against the separator plate 150, thereby closing the passages 158 and 158a in the separator plate to the flow of exhaust gases.
  • the exhaust gases reach a pressure of anywhere from 1 to 7 psi depending on the rpm of the engine and the exhaust muffler system.
  • FIG. 16 there is illustrated the EGR valve 112 during the high cruise mode of engine operation.
  • the plate 169 When the engine is operated at or above 50 to 60 miles per hour (high cruise operation), the plate 169 is up against its seat at the end of the conduit 161 due to the intake manifold vacuum which may be on the order of 10 to 16 inches mercury (Hg).
  • Exhaust gas pressure seats valve plate 170 against seat 113.
  • the exhaust gases entering the EGR system pass into the intake manifold and are then metered through the metering orifice 168 within the plate 169.
  • the metering orifice 168 in the plate 169 has a characterized orifice therein, the area of which is determined by the displacement of the engine with which the EGR valve 112 is used.
  • the area of the opening 168 is in direct proportion to the cubic displacement of the engine.
  • the poppet valve or plate valve 170 is seated against the seat 113.
  • the exhaust pressures become sufficiently high so that they force the poppet valve closed and build up a pressure in the EGR chamber 160, thus forcing more exhaust gases through the metering orifice 168.
  • Valve 170 functions to cut off the flow of exhaust gases and prevent them from going back through the fresh air system into the air cleaner where they might enter the carburetor and then cause over-rich air-fuel mixtures.
  • FIG. 17 there is illustrated the positions of the valve components during the deceleration mode of operation of the engine.
  • the plate valve 169 is set tight against its seat at the end of the conduit 161 due to the high intake manifold vacuum.
  • Fresh air is allowed to enter the EGR valve 112 through the inlet portion 154 and the ports 158 in the separator plate 150.
  • the poppet valve 170 is up tight against the separator plate 150, permitting the free flow of fresh air into the EGR system.
  • the fresh air entering the EGR valve 112 travels through the orifice 168 in the plate 169 and into the velocity nozzle where it enters the intake manifold and thus reduces the high vacuum in the carburetor idling circuit. This reduces the fuel-air ratio during deceleration.
  • fresh air is allowed to enter the port or passage within the inlet portion 154 and pass through the conduit 148, thus reducing the pumping action caused by the pistons when the throttle valve is closed and there is no place for the cylinders to pull fresh air back through the exhaust system and through the exhaust valve during the overlap period into the cylinder, where it will mix with the incoming over-rich air-gas mixture, thus making a combustible fue-air mixture. Combustion does take place, thereby lowering the formation of hydrocarbons and carbon monoxide.
  • FIG. 18 there is illustrated the position of the valves 169 and 170 within the EGR valve 112 during the lower cruise mode of operation.
  • the poppet valve 170 is pulsating off its seat and thus the exhaust gases and fresh air entering the EGR valve 112 through the inlet portion 154 may pass through the openings 158 and through the orifice 168 in the plate valve 169 seated agains the conduit 161 into the conduit 161 and then to the intake manifold.
  • exhaust gases from the conduit 148 may enter the chamber within the EGR valve 112 below the metering orifice 168 and pass through the metering orifice to the velocity nozzle.
  • all fresh air and exhaust gases enter size and an outer circle of holes 158 of a larger size.
  • a plurality of holes 173 are provided near the peripheral edge of the separator plate for receiving the screws 152 which secure the intake portion 154 to the main body 146 of the EGR valve 112. If desired, the inner circle of holes 158a can be replaced by a single central hole.
  • FIGS. 19 and 21 there is better illustrated the construction of the housing 112 and showing the means for guiding the movement of the plate valves toward and away from their respective seats.
  • the plate valve 169 is a generally solid or imperforate plate member having a single central metering orifice 168 therein.
  • lnwardly extending projections or guide means 180, 181, 182 and 183 are provided on the side walls of the housing 146 in order to guide the movement of the plate 169 toward and away from its seat at the end of the conduit 161.
  • this means of guiding the plate 169 is as functional as if pins were to be secured to the interior of the housing and/or separator plate and passed through suitable holes in the plate valve 169 forguiding same.
  • a similar guide means are provided for guiding the valve toward and away from its seat 113.
  • a plurality of projections 186, 187, 188 and 189 extend upwardly from the bottom of the inlet portion 154.
  • the internal diameter of the innermost surface of the guide means 186, 187, 188 and 189 is spaced just outwardly of the maximum diameter of the reed valve 170.
  • the guide means thus retain the plate or poppet valve 170 for movement toward and away from its seat with a minimum of friction.
  • FIG. 22 there is shown schematically an improved exhaust gas recirculating system which includes in addition to the aforedescribed EGR valve and velocity nozzle, a vacuum advance control mechanism inserted into the tube or conduit connecting the carburetor with the distributor vacuum advance diaphragm.
  • the vacuum advance control mechanism is separately described and claimed in the copending application of Milford M. Scott, Case No. 72,782, filed on the same date as this application.
  • the tube 201 connecting the carburetor 20 and the advance mechanism 204 of distributor 30 has a bleed orifice means 203 for bleeding air into the vacuum advance system so as to retard the spark advance and help reduce formation of pollutants.
  • the exhaust gas recirculating valve 212 is functionally like the valve 112 of FIGS. 14-18, with some structural improvements.
  • the valve seats 261 and 213 are formed from a suitable material, for example, stainless steel, and cast into the body or housing 246 and the cover 254, respectively.
  • the guide means comprise pins 272 which are secured to the separator plate 250 and extend into recesses in the body 246 and cover 254 for retaining the ends of the pins 272.
  • the pins 272 extend through holes in the plate 269 and the lower portions of the pins 7 function to cage or guide the plate 270.
  • Chart l results on a 1969 Ford Mustang having a 302 CID engine, a 2 venturi carburetor with automatic transmission.
  • Chart ll tabulates results for a 1969 Neighborhood 440 ClD engine, 4-venturi carburetor, with automatic transmission.
  • Chart lll tabulates results for a 1970 Ford Maverick, 170 CID engine, l-venturi carburetor, with automatic transmission. More extended preliminary tests completed for the California Air Resources Board on or about Oct. 25, 1972 substantiate the specific data presented in the following Charts I, ll and lll.
  • the present invention an improved emission control system using exhaust gas recycling for reducing pollutants formed during engine operation without materially adversely affecting engine performance, power and economy.
  • the disclosed system reduced peak cycle temperatures in the cylinders, the burning rate is controlled, and nitrogen oxide emissions are reduced.
  • the disclosed system includes an EGR valve incorporating a single plate valve or dual plate valve which provides control of the amount of exhaust gas recirculated and the amount of fresh air bled in from atmosphere, said EGR valve systern being automatically self-responsive to the differential pressures of the exhaust manifold, the intake manifold and the ambient or fresh air.
  • 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
  • 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.
  • the recircu' lating 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.
  • 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.
  • 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.
  • 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.
  • the velocity nozzle includes a body having a passage there through 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.
  • 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 selfresponse 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
  • 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 man
  • 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.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
US00302935A 1972-11-01 1972-11-01 Exhaust gas recirculating valve Expired - Lifetime US3844260A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US00302935A US3844260A (en) 1972-11-01 1972-11-01 Exhaust gas recirculating valve
GB2073773A GB1417081A (en) 1972-11-01 1973-05-02 Internal combustion engine exhaust gas recirculation system
JP5543973A JPS558666B2 (xx) 1972-11-01 1973-05-18
SE7314169A SE404068B (sv) 1972-11-01 1973-10-18 Anordnig for atercirkulation av avgaser vid forbrenningsmotorer
DE2353925A DE2353925C3 (de) 1972-11-01 1973-10-27 Vorrichtung zur Überwachung und Steuerung von Verunreinigungen bei einer Verbrennungskraftmaschine
IT53458/73A IT996363B (it) 1972-11-01 1973-10-31 Dispositivo antiinquinamento per motori a combustione interna a ricircolazione di gas di scarico
FR7338963A FR2205106A5 (xx) 1972-11-01 1973-10-31
CA184,692A CA974832A (en) 1972-11-01 1973-10-31 Exhaust gas recirculating means for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00302935A US3844260A (en) 1972-11-01 1972-11-01 Exhaust gas recirculating valve

Publications (1)

Publication Number Publication Date
US3844260A true US3844260A (en) 1974-10-29

Family

ID=23169873

Family Applications (1)

Application Number Title Priority Date Filing Date
US00302935A Expired - Lifetime US3844260A (en) 1972-11-01 1972-11-01 Exhaust gas recirculating valve

Country Status (8)

Country Link
US (1) US3844260A (xx)
JP (1) JPS558666B2 (xx)
CA (1) CA974832A (xx)
DE (1) DE2353925C3 (xx)
FR (1) FR2205106A5 (xx)
GB (1) GB1417081A (xx)
IT (1) IT996363B (xx)
SE (1) SE404068B (xx)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913322A (en) * 1973-08-29 1975-10-21 Kinematics Limited Internal combustion engines
US3946558A (en) * 1973-08-06 1976-03-30 Beekhuis Jr William H Exhaust system and method
US3951115A (en) * 1974-05-15 1976-04-20 Frank Brisko Pollution control device
US3961610A (en) * 1974-10-29 1976-06-08 General Motors Corporation Exhaust gas recirculation control system
US4009689A (en) * 1975-05-02 1977-03-01 General Motors Corporation Rotary combustion engine exhaust gas recirculation system
US4043305A (en) * 1974-10-25 1977-08-23 Regie Nationale Des Usines Renault Control device for regulating the compositions of the inlet and exhaust gases of an internal combustion engine
US4047509A (en) * 1974-05-16 1977-09-13 Regie Nationale Des Usines Renault Method and device for recirculating exhaust gases of internal combustion engines
US4137879A (en) * 1976-06-17 1979-02-06 Toyo Kogyo Co., Ltd. Exhaust gas recirculation means
US4180033A (en) * 1976-09-03 1979-12-25 Nissan Motor Company, Limited Exhaust gas recirculation control system
US4593672A (en) * 1983-11-11 1986-06-10 Tomas Barone Fuel economy apparatus
EP1020633A1 (de) * 1998-07-07 2000-07-19 Man Nutzfahrzeuge Ag Rückschlagventil für Abgasrückführung
US6293266B1 (en) 1998-05-26 2001-09-25 A. Kayser Automotive Systems Gmbh Exhaust gas recirculation device
US6298836B1 (en) * 1999-06-23 2001-10-09 Daimler-Chrysler A.G. Arrangement for venting an engine crankcase
US20060288692A1 (en) * 2005-06-15 2006-12-28 Caterpillar Inc. Exhaust treatment system
US20070068141A1 (en) * 2005-06-15 2007-03-29 Opris Cornelius N Exhaust treatment system
US20070107709A1 (en) * 2005-10-31 2007-05-17 Moncelle Michael E Closed crankcase ventilation system
US20080078170A1 (en) * 2006-09-29 2008-04-03 Gehrke Christopher R Managing temperature in an exhaust treatment system
US7434571B2 (en) 2005-10-31 2008-10-14 Caterpillar Inc. Closed crankcase ventilation system
US7762060B2 (en) 2006-04-28 2010-07-27 Caterpillar Inc. Exhaust treatment system
US20100242927A1 (en) * 2009-03-30 2010-09-30 Saint-Gobain Performance Plastics Pampus Gmbh Seal ring for exhaust gas recirculation system
JP2012077727A (ja) * 2010-10-06 2012-04-19 Daihatsu Motor Co Ltd 内燃機関
US20130042617A1 (en) * 2009-10-20 2013-02-21 Ricardo Uk Limited Energy control
US9273755B2 (en) 2009-03-27 2016-03-01 Ricardo Uk Limited Method and apparatus for balancing a flywheel
US9391489B2 (en) 2010-11-17 2016-07-12 Ricardo Uk Limited Magnetic coupler having magnets with different magnetic strengths
US9704631B2 (en) 2009-03-27 2017-07-11 Ricardo Uk Limited Flywheel
US9718343B2 (en) 2011-04-20 2017-08-01 Ricardo Uk Limited Energy storage system having a flywheel for a vehicle transmission
US20170276080A1 (en) * 2016-03-22 2017-09-28 Toyota Jidosha Kabushiki Kaisha Control apparatus for internal combustion engine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070829A (en) * 1975-08-13 1978-01-31 Honda Giken Kogyo Kabushiki Kaisha Apparatus for controlling secondary air for cleaning exhaust gases
JPS5227924A (en) * 1975-08-25 1977-03-02 Mitsubishi Motors Corp Multi-cylinder internal combustion engine
JPS5922057B2 (ja) * 1977-03-04 1984-05-24 三菱自動車工業株式会社 内燃機関の吸気制御装置
EP0100365A1 (en) * 1982-02-08 1984-02-15 Hanaya Inc. Air supplying device for internal combustion engine
DE19539921C1 (de) * 1995-10-26 1997-02-27 Ranco Inc Ventil
DE19721993A1 (de) * 1997-05-26 1998-12-17 Ammermann Klaus Dr Abgasrückführungsventil mit Druckkompensation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262437A (en) * 1964-12-16 1966-07-26 Harry A Bradshaw Air pollution inhibiting means in the form of a fuel recirculating apparatus for an internal combustion engine
US3717131A (en) * 1971-11-10 1973-02-20 Gen Motors Corp Intake manifold for exhaust gas recirculation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2722927A (en) * 1952-10-29 1955-11-08 George W Cornelius Apparatus for controlling internal combustion engine fuel mixtures
US3362386A (en) * 1965-05-17 1968-01-09 Mcmahon Binder & Huron Internal-combustion engine
DE1944357A1 (de) * 1969-09-01 1971-03-18 Brooks Walker Vorrichtung zum Regeln der zurueckfuehrenden Auspuffgase bei einem Verbrennungsmotor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262437A (en) * 1964-12-16 1966-07-26 Harry A Bradshaw Air pollution inhibiting means in the form of a fuel recirculating apparatus for an internal combustion engine
US3717131A (en) * 1971-11-10 1973-02-20 Gen Motors Corp Intake manifold for exhaust gas recirculation

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3946558A (en) * 1973-08-06 1976-03-30 Beekhuis Jr William H Exhaust system and method
US3913322A (en) * 1973-08-29 1975-10-21 Kinematics Limited Internal combustion engines
US3951115A (en) * 1974-05-15 1976-04-20 Frank Brisko Pollution control device
US4047509A (en) * 1974-05-16 1977-09-13 Regie Nationale Des Usines Renault Method and device for recirculating exhaust gases of internal combustion engines
US4043305A (en) * 1974-10-25 1977-08-23 Regie Nationale Des Usines Renault Control device for regulating the compositions of the inlet and exhaust gases of an internal combustion engine
US3961610A (en) * 1974-10-29 1976-06-08 General Motors Corporation Exhaust gas recirculation control system
US4009689A (en) * 1975-05-02 1977-03-01 General Motors Corporation Rotary combustion engine exhaust gas recirculation system
US4137879A (en) * 1976-06-17 1979-02-06 Toyo Kogyo Co., Ltd. Exhaust gas recirculation means
US4180033A (en) * 1976-09-03 1979-12-25 Nissan Motor Company, Limited Exhaust gas recirculation control system
US4593672A (en) * 1983-11-11 1986-06-10 Tomas Barone Fuel economy apparatus
US6293266B1 (en) 1998-05-26 2001-09-25 A. Kayser Automotive Systems Gmbh Exhaust gas recirculation device
EP1020633A1 (de) * 1998-07-07 2000-07-19 Man Nutzfahrzeuge Ag Rückschlagventil für Abgasrückführung
US6298836B1 (en) * 1999-06-23 2001-10-09 Daimler-Chrysler A.G. Arrangement for venting an engine crankcase
US20070068141A1 (en) * 2005-06-15 2007-03-29 Opris Cornelius N Exhaust treatment system
US20060288692A1 (en) * 2005-06-15 2006-12-28 Caterpillar Inc. Exhaust treatment system
US20070107709A1 (en) * 2005-10-31 2007-05-17 Moncelle Michael E Closed crankcase ventilation system
US7320316B2 (en) 2005-10-31 2008-01-22 Caterpillar Inc. Closed crankcase ventilation system
US7434571B2 (en) 2005-10-31 2008-10-14 Caterpillar Inc. Closed crankcase ventilation system
US7762060B2 (en) 2006-04-28 2010-07-27 Caterpillar Inc. Exhaust treatment system
US20080078170A1 (en) * 2006-09-29 2008-04-03 Gehrke Christopher R Managing temperature in an exhaust treatment system
US9273755B2 (en) 2009-03-27 2016-03-01 Ricardo Uk Limited Method and apparatus for balancing a flywheel
US9704631B2 (en) 2009-03-27 2017-07-11 Ricardo Uk Limited Flywheel
US20100242927A1 (en) * 2009-03-30 2010-09-30 Saint-Gobain Performance Plastics Pampus Gmbh Seal ring for exhaust gas recirculation system
US20130042617A1 (en) * 2009-10-20 2013-02-21 Ricardo Uk Limited Energy control
JP2012077727A (ja) * 2010-10-06 2012-04-19 Daihatsu Motor Co Ltd 内燃機関
US9391489B2 (en) 2010-11-17 2016-07-12 Ricardo Uk Limited Magnetic coupler having magnets with different magnetic strengths
US9718343B2 (en) 2011-04-20 2017-08-01 Ricardo Uk Limited Energy storage system having a flywheel for a vehicle transmission
US20170276080A1 (en) * 2016-03-22 2017-09-28 Toyota Jidosha Kabushiki Kaisha Control apparatus for internal combustion engine
US10247118B2 (en) * 2016-03-22 2019-04-02 Toyota Jidosha Kabushiki Kaisha Control apparatus for internal combustion engine

Also Published As

Publication number Publication date
JPS558666B2 (xx) 1980-03-05
DE2353925B2 (de) 1980-10-23
JPS4977047A (xx) 1974-07-25
IT996363B (it) 1975-12-10
FR2205106A5 (xx) 1974-05-24
DE2353925C3 (de) 1981-06-19
DE2353925A1 (de) 1974-05-09
CA974832A (en) 1975-09-23
GB1417081A (en) 1975-12-10
SE404068B (sv) 1978-09-18

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