US3730157A - Carburetor control system and method for regulating air to fuel ratio - Google Patents

Carburetor control system and method for regulating air to fuel ratio Download PDF

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Publication number
US3730157A
US3730157A US00040182A US3730157DA US3730157A US 3730157 A US3730157 A US 3730157A US 00040182 A US00040182 A US 00040182A US 3730157D A US3730157D A US 3730157DA US 3730157 A US3730157 A US 3730157A
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carburetor
fuel
air
pressure
engine
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US00040182A
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C Gerhold
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Universal Oil Products Co
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Universal Oil Products Co
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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
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/10—Other installations, without moving parts, for influencing fuel/air ratio, e.g. electrical means
    • F02M7/11—Altering float-chamber pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2700/00—Mechanical control of speed or power of a single cylinder piston engine
    • F02D2700/02—Controlling by changing the air or fuel supply
    • F02D2700/0217—Controlling by changing the air or fuel supply for mixture compressing engines using liquid fuel
    • F02D2700/0225—Control of air or mixture supply
    • F02D2700/0228—Engines without compressor
    • F02D2700/023—Engines without compressor by means of one throttle device
    • F02D2700/0233—Engines without compressor by means of one throttle device depending on several parameters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/67—Carburetors with vented bowl

Definitions

  • Sensing means are p i to be responsive 261/72; 123/119 140 MC to ambient conditions and/or to a given exhaust gas component.
  • sensors along with transmitter [56] References C'ted means, are integrated into the system to have fuel flow UNITED STATES PATENTS increased or decreased by pressure in the float chamber proportlonal to the net effect of having an ml,999,5l7 4/l935 Prentis ..26l/DIG.
  • Gerho/d A TTOR/VEYS CARBURETOR CONTROL SYSTEM AND METHOD FOR REGULATING AIR TO FUEL RATIO The present invention relates to an improved method and means for operating an engine carburetor system so as to provide corrective variations in the air-fuel ratio and thereby obtain a desired exhaust gas composition.
  • the invention is directed to a method and system for regulating the air to fuel ratio by varying pressure in the carburetor float bowl.
  • fuel flow is increased or decreased to the fuelair mixing section of the carburetor responsive to one or more sensors which will provide signals indicative of an increase or decrease in the amount of oxygen reaching the engine and being carried through the engine to an exhaust gas converter zone.
  • the change in ambient conditions which will affect the actual amount of present and the air-fuel ratio will include changes in air temperature; barometric pressure and humidity.
  • sensing means and accompanying amplifying or transmitted means to effect corrective variations in the fuel introduction for changes in any one of these ambient conditions.
  • a correction in the air-fuel ratio for any one ambient change affecting 0 content is of advantage; however, the sensing of all of the changes and the scaling and totalizing thereof is preferable.
  • OBJECTS OF THE INVENTION As an object of the present invention to obtain better catalytic conversion of engine exhaust gases, there is herewith provided a method of more closely controlling the air to fuel ratio, or more particularly fuel input at the carburetor zone, by adjusting the pressure on the fuel in the carburetor chamber responsive to at least one ambient change affecting 0 content.
  • the system may be such that only one sensor-transmitter affects the pressure control to the carburetor bowl.
  • a plurality of sensor-transmitters will be connected to a computing or totalizing relay device, which will transmit a net effect to the pressure regulating means.
  • the sensing or signaling means for the system may be from the analysis or measurement of a, particular exhaust gas component, such as O, or CO, and pressure on the fuel then adjusted responsive to such measurement or analysis.
  • a, particular exhaust gas component such as O, or CO
  • the present invention provides, in connection with an internal combustion engine with a carburetor system, the improved method of operation to make corrective variations in air to fuel ratios and maintain a substantially constant exhaust gas composition, which comprises, providing a pressure source in communication with the fuel float.
  • the present invention provides a carburetor control system :for an internal combustion engine which will effect corrective variations in the air to fuel ratio so as to maintain a desired exhaust gas composition, which comprises in combination, a
  • gas pressure source connecting through passageway means to the float chamber of the engine.
  • carburetor an adjustablevalving means in said passageway means to regulate pressure to said chamber, interconnecting at least one sensor means into said system and to transmitter means for producing at least one scaled signal responsive to a change noted by the sensor from an ambient condition or a change in quantity of an engine exhaust gas component, connecting each such transmitter means to a relay to provide a resulting output signal, and connecting said output signal of said relay to said valving means, whereby such output signal effects an adjustment in the air to fuel ratio to said engine.
  • the change in pressure in the carburetor bowl or chamber to provide a change in air to fuel ratio may be made responsive to analyzing means for sensing a change in oxygen or other critical components in exhaust gas stream, as well as by sensing changes in one or all of the various ambient conditions that can effect oxygen content reaching the carburetor mixing zone.
  • a preferred system which will correct for all of the various changes in ambient conditions will thus have a plurality of sensing devices and transmitting means to in turn carry the signals to an addition means or to a computing means such that there may be a single resultant signal to the control instrument varying the pressure to the carburetor bowl.
  • sensors and transmitting means may be embodied in a particular overall control system and it is not intended to limit the present invention to any one type of sensortransmitter or to any one type of control which provides a summation or resulting output signal which in turn is connected to the valving means to effect the adjustment in air to fuel ratio.
  • the sensing or analyzing means may provide a signal for accompanying amplifying and/or transmitter means which provides an electrical or electronic output, or alternatively, the sensing-transmitter means may be hydraulic, pneumatic or mechanical in nature and each output signal carried to a suitable and compatible control means for regulating pressure.
  • the sensing-transmitter means may be hydraulic, pneumatic or mechanical in nature and each output signal carried to a suitable and compatible control means for regulating pressure.
  • totalizing or computing relay devices which can handle at least up to about six different scaled pneumatic signals and provide a resulting output control signal.
  • totalizing or computer relay means that can receive electrical or electronic signals and in turn transmit a single resultant electrical or pneumatic output signal capable of regulating either a motor driven or a pneumatically operated control valve means. All of these types of equipment are familiar to those familiar with the use and selection of instrumentation devices and they need not be set forth or described in detail herein.
  • FIG. 1 of the drawing indicates diagrammatically one simplified embodiment of the present invention by having a sensor and connecting control device to provide regulation of manifold pressure in turn connective with the carburetor float chamber, whereby the air to fuel ratio may be varied for the engine.
  • FIG. 2 of the drawing is a graph showing diagrammatically how carburetion or air to fuel ratio has an effect on conversion of the various noxious components in the exhaust gas stream from an internal combustion engine.
  • FIG. 3 of the drawing indicates diagrammatically the integration of a plurality of sensing means or analyzing means with a computing relay so as to provide regulation of pressure on the carburetor float chamber.
  • FIG. 4 of the drawing illustrates an alternate modification wherein the pressure line may be a vacuum line connected to the engine manifold.
  • an internal combustion engine I with intake manifold means 2 and a superposed carburetor 3 with a float chamber 4 which receives fuel by way of gas inlet line 5.
  • Air for admixture with the gasoline is drawn to the carburetor through air filter means 6 so as to flow downwardly through the throttle area 7 into a venturi section 8 which in turn receives fuel by way of suitable jets or openings, not shown, which are connective with the float chamber 4.
  • suitable jets or openings not shown, which are connective with the float chamber 4.
  • Other details of the carburetor system may be conventional and are not indicated in the present diagrammatic drawing.
  • idling jets there may be one or more idling jets, acceleration or high speed jets, etc., as well as internal vent means leading from the upper portion of the carburetor float chamber 4 into the air intake section of the carburetor.
  • internal vent means leading from the upper portion of the carburetor float chamber 4 into the air intake section of the carburetor.
  • the carburetor float bowl is vented internally or externally, there is only an effect from atmospheric pressure with respect to the fuel level in the carburetor bowl or float chamber and the application of a varying regulated pressure to such chamber from an outside source will have an effect of increasing or decreasing fuel flow from the chamber through the internal jets of the carburetor into its venturi zone for admixture with incoming air.
  • the quantity of air entering such zone is, of course, responsive to the position of the carburetor throttle as determined by the drivers foot pedal or other linkage means.
  • FIG. 1 also shows tubing or other piping means 9 and 10 connecting the intake manifold 2 to control device 12 and to line 11 whereby a varying vacuum can be exerted on the top of the fuel in float chamber 4.
  • a sensor-transmitter is also shown connecting by way ofline 13 to the control device 12.
  • one or more sensing devices can be used to note a change in oxygen content of the ambient air.
  • temperature, or a barometric pressure change, or a humidity change can require a corrective variation in the fuel addition to in turn maintain a desired air to fuel ratio reaching the engine.
  • control device 12 will be operated to permit a greater vacuum to reach the float chamber 4 and in turn reduce the fuel flow from such chamber into the carburetor mixing zone.
  • the humidity of the ambient air may decrease from that of a previous condition, or from a normal condition, such that the ambient air has a greater amount of oxygen per cubic foot
  • a sensing of the humidity change and regulation to a suitable control device 12 whereby vacuum on the fuel in the chamber 4 will be lessened and an increased quantity of fuel permitted to flow into the mixing zone of the carburetor.
  • a sensor-transmitter means may be utilized in combination with the system to note variations in atmospheric pressure and the control device 12 in each instance is regulated responsive to the particular barometric pressure change such that fuel input is modified to provide a change in air to fuel ratio.
  • control means 12 can also be operated responsive to a sensor or analyzer means which is directly connective within the converter means 15 so as to read variations in oxygen or CO content, whereby a more stabilized or preferable air to fuel ratio can be provided at the carburetor zone from pressure on the fuel in the carburetor bowl.
  • a sensor or analyzer means which is directly connective within the converter means 15 so as to read variations in oxygen or CO content, whereby a more stabilized or preferable air to fuel ratio can be provided at the carburetor zone from pressure on the fuel in the carburetor bowl.
  • oxygen sensing devices which can provide an electronic or pneumatic signal which may be directly connective with the control means 12, and in view of their commercial availability it is not believed necessary to provide details of such types of apparatus herein.
  • the percent CO present in the exhaust gas stream which in turn is a measure of the carburetion or air to fuel ratio.
  • the percent CO present will be high where there is a low air to fuel ratio and conversely, lower where there is more oxygen present as a result of a higher air to fuel ratio.
  • the graph clearly shows that for a catalytic converter utilizing an optimum type of catalyst to effect the conversion of the noxious components in the exhaust gas stream there is the necessity to control the percent of CO, or oxygen, as determined by the air to fuel ratio for the engine operation, whereby there is a conversion condition generally optimum for each of the undesirable components and their substantial elimination from the exhaust gas stream.
  • FIG. 3 of the drawing there is indicated diagrammatically a carburetor control system which has a carburetor float bowl section 16 provided with pressure regulation means from piping or tubing 17 having control valve 18.
  • the pressure line 17 may be a portion of a vacuum line 19 connective with the engine manifold 20 (See FIG. 4) or alternatively, it may comprise an extended portion of line 21, with valve 22, from an air storage tank 23.
  • the latter may be a small tank suitable to hold relatively low pressure air from a small compressor means 24 so as to have an air supply line 25 connective with computing relay 26.
  • a controlled pneumatic output is thus provided from the latter through line 27 to control valve means 18.
  • a plurality of sensor-transmitter means are indicated diagrammatically at 28, 29, 30, 31 and 32 for respectively providing: oxygen analysis; 0 signal transmitter means; temperature change signals; barometric pressure change signals; and humidity variation signals.
  • air pressure lines 33, 34, 35 and 36 to provide a pneumatic form of transmission means to the plurality of sensor-transmitter means shown as 29, 30, 31 and 32.
  • lines 37, 38, 39 and 40 to effect the transmission of the varying pneumatic signals from the respective transmitter means to the computer relay means 26.
  • the latter may comprise a standard pneumatic form of totalizing relay adapted to handle a plurality of pneumatic signals and in turn transmit a resultant output signal by way of line 27 to control valve means 18.
  • the analyzer-transmitter means at 28 and 29 of FIG. 3 of the drawing may embody the O analyzer of page 29, Chapter 24 of the Handbook of Automation, Computation and Control coupled with electrical resistance signal converting means, such as described on pages 17 and 18 of Chapter 7 of the same book, whereby the pneumatic pressure of line 33 is scaled in line 37 to computing relay 26.
  • the temperature transmitter-sealer at 30 could embody a thermocouple of resistance thermometer coupled to a electropneumatic converter means as heretofore noted in connection with 29.
  • the temperature sensing device could be a Bourdon tube or bi-metal strip which gives a displacement action to control flow in line 38 to computing relay 26.
  • the barometric pressure transmitter-scaler at 31, as well as the humidity transmitter-sealer at 32, could be sensors such as shown respectively in the aforesaid Handbook of Automation at pages 20-12 through 20-6 and Perry s Handbook pages 22-37 and 22-38, whereby a displacement action could in turn regulate flow in the respective lines 39 and 40 to relay 26.
  • the latter may be a Moore Nullmatic M/F, such as shown in the Handbook page 7-60, or other equivalent type.
  • thevarious sensor or analyzer means may be connected to electrical or electronically sensitive transmitting means such that scaled or weighted signals may be simultaneously supplied to a computer or totalizing relay means adapted to effect the summation of suchtype signals and in turn provide a single output signal.
  • the signals may be in a digital or analog form and the various signals in turn carried to a computing type relay so as to provide that the net effect of the various sensing means can be used to control pressure on the fuel and regulate air to fuel ratios.
  • each transmitter means will incorporate, or have in combination therewith, suitable weighted or scaled adjustment means whereby the net effect of each type of reading or analysis can be sent to the computing relay for subsequent transmission of a net signal to the actual regulating means.
  • the pressure adjustment which is to be made on the carburetor float chamber 16 may be a vacuum change resulting from the connection of lines 17 and 19 to the engine manifold or, alternatively, as shown in the full lines of FIG. 3, there may be the regulation of an actual low superatmospheric pressure change carrying through lines 21 and 17 from the small pressure tank 23.
  • a small compressor and storage tank may readily be provided under the hood of an automobile and in convenient combination with the engine, it seems appropriate that the pressure regulation change on the carburetor float chamber be from regulated low pressure air and that the computing relay as well as the sensor-transmitter means connective therewith be operated pneumatically from the same air system.
  • any one condition is such as to decrease oxygen content in the air stream passing to the carburetor system through the air filter means
  • the present improved method and means provide a novel and relatively simple approach providing corrective variations in carburetion for an internal combustion engine and in turn provide a means for stabilizing the oxygen and CO components within the exhaust gas stream so as to permit optimum conversion in a catalytic converter system.
  • the improved method of operation to make corrective variations in air to fuel ratios and maintain a desired exhaust gas composition comprises, providing a pressure source other than atmospheric and remote from the carburetor in communication with the fuel float chamber of the engine carburetor, and adjusting the pressure level on the fuel therein to change fuel flow therefrom responsive to the 0 content in the air stream to the carburetor.
  • the method of claim 1 further characterized in that the pressure source in communication with the fuel float chamber comprises a separate low pressure pneumatic supply.
  • a carburetor control system for an internal combustion engine providing corrective variations in the air to fuel ration so as to maintain -a desired exhaust gas composition which comprises in combination, a gas pressure source other than atmospheric and remote from the carburetor connecting through passageway means to the float chamber of the engine carburetor, an adjustable valving means in said passageway means to regulate pressure to said chamber, a sensor means interconnected into said system, a transmitter means, said transmitter means producing at least one scaled signal responsive to a change noted by the sensor in oxygen content change reaching said carburetor, said transmitter means having a computing relay in interconnection to therewith provide a resulting output signal, and the output signal of said relay being interconnected with said valving means, whereby such output signal effects an adjustment in the air to fuel ratio to said engine.
  • a carburetor control system to effect corrective variations in the air to fuel ratio for an internal combustion system so as to maintain a desired exhaust gas composition which comprises in combination, an air pressure source other than atmospheric and remote from the carburetor connecting through conduit means to the float chamber of the engine carburetor, an adjustable valve means in said conduit means, a multifunction computing relay providing an averaged transmitted power source connecting to said adjustable valve means, and at least two signal connections to said computing relay sensed from atmospheric condition and from an exhaust gas component, each of which shows a change in oxygen content to the carburetor; whereby the effect of at least two signals will be averaged and provide a resulting adjustment in fluid pressure on said float chamber from said valve means.
  • the carburetor control system of claim further characterized in that said computing relay provides a resultant pneumatic output signal connective with said adjustable valve means and said signal connections to said computer relay from said transmitter means are scaled pneumatic signals, whereby said computing relay effects the totalizing of a plurality of pneumatic signals being transmitted thereto.
  • the carburetor control system of claim 5 further characterized in that said computing relay providing an averaged signal output connecting to said adjustable valve means receives a plurality of weighted electrical signals from each of the plurality of transmitter means, and said computing relay effects the totalizing of such electrical signals to provide a resultant averaged output signal.
  • the method of claim 1 further characterized in that there is provided an increase in pressure level to increase fuel flow responsive to a decreasing CO content in the exhaust gases from the engine and, conversely, decreasing pressure level responsive to an increasing CO content in the exhaust.
  • the method of claim 1 further characterized in that there is provided an increase in pressure level to increase fuel flow responsive to an increasing 0 content in the exhaust gases from the engine and, conversely, decreasing pressure level responsive to a decreasing 0 content in the exhaust.
  • the method of claim 1 further characterized in that there is provided an increase in pressure level to increase fuel flow responsive to a decreasing air temperature and, conversely, decreasing pressure level responsive to an increasing air temperature.
  • the method of claim 13 further characterized in that there is provided an increase in pressure level to increase fuel flow responsive to an increasing humidity of ambient air and, conversely, a decrease in pressure level for a decreasing humidity.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
US00040182A 1970-05-25 1970-05-25 Carburetor control system and method for regulating air to fuel ratio Expired - Lifetime US3730157A (en)

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US (1) US3730157A (enrdf_load_stackoverflow)
CA (1) CA938185A (enrdf_load_stackoverflow)
DE (1) DE2124725C3 (enrdf_load_stackoverflow)
ES (1) ES391484A1 (enrdf_load_stackoverflow)
FR (1) FR2093684A5 (enrdf_load_stackoverflow)
GB (1) GB1344521A (enrdf_load_stackoverflow)
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Cited By (30)

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US3803839A (en) * 1970-09-12 1974-04-16 Zeuna Staerker Kg Method for the detoxification of exhaust gases of internal combustion engines
US3827237A (en) * 1972-04-07 1974-08-06 Bosch Gmbh Robert Method and apparatus for removal of noxious components from the exhaust of internal combustion engines
US3831910A (en) * 1971-12-16 1974-08-27 Zenith Carburetter Co Ltd Carburetors
US3832848A (en) * 1972-03-30 1974-09-03 Bosch Gmbh Robert Method to reduce noxious components in the exhaust of internal combustion engines
US3874171A (en) * 1972-01-20 1975-04-01 Bosch Gmbh Robert Exhaust gas composition control with after-burner for use with internal combustion engines
US3900014A (en) * 1972-09-15 1975-08-19 Bosch Gmbh Robert Fuel metering device for internal combustion engines
US3908371A (en) * 1971-12-29 1975-09-30 Nissan Motor Apparatus for supplying fuel to a dual-catalyst exhaust treatment system
US3911674A (en) * 1973-01-22 1975-10-14 Toyota Motor Co Ltd Control apparatus for engine exhaust gas purification system
US3933438A (en) * 1974-07-05 1976-01-20 General Motors Corporation Combustible gas sensor for closed loop fuel control
US3974813A (en) * 1972-08-29 1976-08-17 Robert Bosch G.M.B.H. Fuel metering system for internal combustion engines
US3993447A (en) * 1973-12-28 1976-11-23 Phillips Petroleum Company Apparatus and method for control of carbon black reactor
US4034730A (en) * 1975-09-15 1977-07-12 General Motors Corporation Closed loop carburetor air-fuel ratio control apparatus
US4034727A (en) * 1974-12-24 1977-07-12 Nissan Motor Co., Ltd. Automotive engine carburetor
US4039638A (en) * 1975-02-22 1977-08-02 Lucas Electrical Limited Fuel supply system for an internal combustion engine
US4058978A (en) * 1974-03-31 1977-11-22 Wilfried Bockelmann Regulating device for metering a supplementary air quantity to improve combustion in combustion engines
DE2801409A1 (de) * 1977-01-14 1978-07-27 Sibe Vergaser fuer brennkraftmaschinen
US4128088A (en) * 1976-05-10 1978-12-05 Colt Industries Operating Corp. Apparatus and system for controlling the air-fuel ratio supplied to a combustion carburetor
US4135482A (en) * 1976-05-10 1979-01-23 Colt Industries Operating Corp Apparatus and system for controlling the air-fuel ratio supplied to a combustion engine
US4231220A (en) * 1977-08-17 1980-11-04 Toyota Kidosha Kogyo Kabushiki Kaisha Secondary air control system for an internal combustion engine
US4299089A (en) * 1977-05-13 1981-11-10 Toyota Jidosha Kogyo Kabushiki Kaisha Secondary air control system in an internal combustion engine
US4944272A (en) * 1987-11-23 1990-07-31 Aktiebolaget Electrolux Carburetor arrangement
US5021198A (en) * 1990-01-16 1991-06-04 Bombardier Inc. Carburetor with high altitude compensator
US5299551A (en) * 1993-02-10 1994-04-05 Tofel Richard M Carburetor kit for improved air-fuel mixture
US5309889A (en) * 1993-02-10 1994-05-10 Tofel Richard M Carburetor kit for improved air-fuel mixture
US5879595A (en) * 1997-03-19 1999-03-09 Holtzman; Barry L Carburetor internal vent and fuel regulation assembly
US5879594A (en) * 1997-07-10 1999-03-09 Holtzman; Barry L. Temperature responsive pressure splitter
US6186117B1 (en) 1996-10-09 2001-02-13 Bombardier Inc. Electronic compensation system
EP3219972A1 (en) * 2016-03-15 2017-09-20 Honda Motor Co., Ltd. Fuel supply apparatus for general purpose engine
US10934912B2 (en) * 2018-07-31 2021-03-02 Volkswagen Aktiengesellschaft Method for the exhaust aftertreatment of an internal combustion engine and exhaust aftertreatment system
US11168629B2 (en) * 2018-12-12 2021-11-09 Horiba, Ltd. Exhaust gas analysis apparatus, exhaust gas analysis method, and correction expression creation method

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Publication number Priority date Publication date Assignee Title
JPS5219254B2 (enrdf_load_stackoverflow) * 1973-09-19 1977-05-26
JPS59126056A (ja) * 1983-01-07 1984-07-20 Fuji Heavy Ind Ltd 過給機付機関の気化器制御装置

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US2023647A (en) * 1930-03-15 1935-12-10 Schmid Carl Carburetor
US1999517A (en) * 1932-01-25 1935-04-30 Augustin M Prentiss Carburetor
US2244669A (en) * 1936-08-01 1941-06-10 Askania Werke Ag Control device for the fuel feed of internal combustion engines
US2248090A (en) * 1939-10-30 1941-07-08 George M Holley Self-controlled carburetor
US2557111A (en) * 1943-10-22 1951-06-19 Gen Motors Corp Charge forming device
US2796243A (en) * 1955-05-16 1957-06-18 Gen Motors Corp Carburetor
US3036564A (en) * 1958-11-18 1962-05-29 R E T E M Rech S Et Etudes Ele Low-pressure fuel injection device
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Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3803839A (en) * 1970-09-12 1974-04-16 Zeuna Staerker Kg Method for the detoxification of exhaust gases of internal combustion engines
US3831910A (en) * 1971-12-16 1974-08-27 Zenith Carburetter Co Ltd Carburetors
US3908371A (en) * 1971-12-29 1975-09-30 Nissan Motor Apparatus for supplying fuel to a dual-catalyst exhaust treatment system
US3874171A (en) * 1972-01-20 1975-04-01 Bosch Gmbh Robert Exhaust gas composition control with after-burner for use with internal combustion engines
US3832848A (en) * 1972-03-30 1974-09-03 Bosch Gmbh Robert Method to reduce noxious components in the exhaust of internal combustion engines
US3827237A (en) * 1972-04-07 1974-08-06 Bosch Gmbh Robert Method and apparatus for removal of noxious components from the exhaust of internal combustion engines
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Also Published As

Publication number Publication date
FR2093684A5 (enrdf_load_stackoverflow) 1972-01-28
DE2124725C3 (de) 1975-03-13
GB1344521A (en) 1974-01-23
DE2124725B2 (de) 1974-07-25
CA938185A (en) 1973-12-11
SE368852B (enrdf_load_stackoverflow) 1974-07-22
DE2124725A1 (de) 1971-12-02
ES391484A1 (es) 1973-06-16

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