US3785628A - Device for the implementation of procedures for the decontamination of internal combustion engine exhaust gases - Google Patents

Device for the implementation of procedures for the decontamination of internal combustion engine exhaust gases Download PDF

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Publication number
US3785628A
US3785628A US00280229A US3785628DA US3785628A US 3785628 A US3785628 A US 3785628A US 00280229 A US00280229 A US 00280229A US 3785628D A US3785628D A US 3785628DA US 3785628 A US3785628 A US 3785628A
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throttle flap
carburetor
improvement according
ramjet
duct
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US00280229A
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L Lang
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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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • 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
    • F02M29/00—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture
    • F02M29/04—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture having screens, gratings, baffles or the like
    • F02M29/06—Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture having screens, gratings, baffles or the like generating whirling motion of mixture
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder

Definitions

  • ABSTRACT A device for the implementation of procedures for the decontamination of internal combustion engine exhaust gases by preparation of a flammable and ignitable air-fue1 mixture with a variable air ratio figure A by means of a throttle flap adjustment regulating the fuel jet hydraulic resistance, and which is adjustable such that fuel atomization is performed, using a throttle flap permitting a tolerated air gap all around the circumference in the carburetor duct for the throttle flap position a 0, which has rims with bores on both sides, and which is followed by a ramjet in the carburetor duct.
  • This invention relates to a device for the implementation of procedures for the decontamination of internal combustion engine exhaust gases by preparation of the flammable and ignitable air-fuel mixture with a variable air ratio figure A by means of a throttle flap adjustment regulating the fuel jet hydraulic resistance, and which is adjustable such that fuel atomization is performed, using a throttle flap permitting a tolerated air gap all around the circumference in the carburetor duct for the throttle flap position a which has rims with bores on both sides, and which is followed by a ramjet in the carburetor duct.
  • the vertical measure provides, as compared to the technical state-of-the-art of carburetors with a disctype throttle flap, an increased mixture preparation by increased vorticity of the air/fuel mixture with maximum possible fuel atomization.
  • any fuel portions which may have remained liquid are prepared by a twin jet following the carburetor.
  • the twin jet has a collecting pocket, in which any liquid portions of the fuel accumulate, and are subject to post-atomization by bores in the collecting pocket walls.
  • the horizontal measure relates to the supply of additional air, synchronously controlled by the throttle flap movement and dependent on the operational steps, over the partial range of an exhaust gas decontamination test, with no additional air being supplied in the case of small throttle flap swivel angles of e.g. up to
  • an air regulating plate is arranged below the carburetor, connected with a roll guide additional air transmitter or a segment-controlled additional air supply. Control of additional air-supply in accordance with the operational steps, is, in this case,
  • This combined processing technique has resulted in an effective exhaust gas decontamination in the case of internal combustion engines.
  • the task of the invention is to eliminate any difficulties in the modification of state-of-the-art carburetors, particularly in the vertical provision for improving the air-fuel mixture, which is of special importance in the modification of motor vehicles used in traffic.
  • the parts required for that would have to guarantee a possible interchangeability at any time. These parts shall be limited to a minimum number with the exchange parts being of such a design that they are of maximum effectiveness and cheap in production.
  • my improvement over my copending application resides in the bores of the rims being formed as oblong holes, and that a ramjet having a smooth entry surface and a subsequent rough surface is arranged between carburetor and suction tube.
  • FIG. 1 is a perspective view of a throttle flap
  • FIG. 2 is a sectional drawing of a throttle flap in a carburetor duct
  • FIG. 3 is a longitudinal section of a ramjet following the carburetor
  • FIG. 3a is an enlarged illustration of a portion of FIG.
  • FIG. 4 is a diagram of the passage cross sections in the carburator duct, as a function of the throttle flap position, in the case of a rim-free and rim-containing throttle flap half;
  • FIG. 5 is a diagram of the passage cross sections in the carburetor duct, as a function of the throttle flap position of a disc-type throttle flap a and a throttle flap b' partially covered with rims.
  • FIG. 6 is a diagram of a change in the passage cross section as a function of the throttle flap angle for a rimcontaining throttle flap and a disc-type throttle flap without rims.
  • the rims ll, 12 on both sides extend over half of the circumference of throttle flap 111, with the bores being formed as oblong holes 112.
  • the surface portion of the two oblong holes 112 at the top and at the bottom surface of throttle flap 1 l l is about 12 18 percent of the surface of the whole rim back, with the oblong holes preferably of the same form, having a slot width of preferably 0.8 1.0 mm.
  • the width b, at the widest point of the rim back is determined by an angle 2 X [3 of approximately 30 altogether to the throttle flap shaft axis.
  • the passage gap s,, at the rim-covered throttle flap half, and passage gap s, at the remaining throttle flap half between carburetor duct 20 is within preferably 0.05 and 0.08 mm.
  • Ramjet 113 shown in a longitudinal section in FIG. 3, has a total height h, and an upper outer diameter D, which is equal to the diameter of suction duct 25.
  • the total height h of ramjet 113 is within the limits of 0.6 and 0.8 of the upper outer diameter D of ramjet 113.
  • the conicity of the conical entry of ramjet l 13 is determined by a reduction of the exit cross sectional area F in the area of the rough distance h,,, of about -20 percent as compared to the entry cross sectional area F of ramjet 113.
  • the rough distance itself shall be about half of the total height h of ramjet 113.
  • Roughness height h, at this rough distance h, is 0.5 0.8 mm, at a carburetor duct diameter D of 28 40 mm.
  • the roughness height h itself can be made by a fine thread or by knurling.
  • the ramjet 113 below carburetor 21 is, with its flange 109, between carburetor 21 and suction duct 25 to the engine cylinders sealed to the outside by two preferably standard flange packings with flange 109 of ramjet 113 being arranged between these two flange packings. Good sealing characteristics were obtained in practice by designing the packings according to FIG. 3a.
  • the lower packing 115 has a hole of the diameter of the ramjet flange 109, the upper packing 114 has a hole diameter of the carburetor duct D, i.e., standard-type packing is used in most cases for the upper packing 114.
  • ramjet 113 can be rounded off at the entry in the surface F,;, in order to make up for any inaccuracies in the packing bores.
  • a carburetor is considered an atomizer, which works on the principle of the velocity atomizers; i.e., a cohesive mass of liquid is disrupted by the inertia, surface and viscosity forces, as a result of the relative speed between the liquid and the airstream surrounding it.
  • This literature additionally points out the calculation of the degree of fuel atomization which can be obtained. From that it can be seen that the maximum smallest drop size depends, apart from the substance constant, very much on the air/fuel relative speed. The higher it is, the finer will be the fuel atomization.
  • FIG. 4 shows the difference between surfaces on the rim-covered side and the rim-free side.
  • the difference is particularly obvious in small throttle flap swivel angles of e.g. up to l5.
  • S means the gap on the rim-free side and 8, means the gap on the rim-covered side. If the throttle flap is swivelled through the closely tolerated gap of the horizontal throttle flap position a 0 is maintained at the rim covered side of the throttle flap, whereas a crescent-shaped surface has already been formed at the rim-free side. This results in maintaining the maximum relative speed air to fuel at the side of the idling jet and bypass bores. Thus a maximum possible mixture preparation is reached at the lower engine operating range, resulting in a trouble-free and efficient engine operation.
  • FIG. 5 shows that the resulting flow surface in the carburetor duct is smaller in case of a throttle flap according to FIG. 1 than in case of a disc-type throttle flap.
  • Curve a is for a disc-type throttle flap
  • curve b is for a rim-covered throttle flap.
  • Increased vorticity in the flow in the area of the throttle flap according to FIG. 1 has a braking influence on the flow, which is roughly compensated by a flow acceleration due to the reduced flow surface.
  • FIG. 6 shows the surface variation as a function of the swivel angle a of the throttle flap.
  • the differential curves dF/da for the disc-type throttle flap, and a throttle flap according to FIG. 1 provide information about a change in the flow. Flow processes are largely not clarified, particularly under the influence of additional air (correction air in the carburetor), so that mathematical aspects of the flow are not given.
  • FIG. 6 shows the areas in which the speeds are largely constant, this is actually the case if dF/da is approximately 0.
  • a crescent-shaped throttle flap has a position already at idle engine r.p.m. which varies with the idling speed to be adjusted.
  • a basic adjustment of the disc-type throttle flap of approximately 8 was assumed. It can be concluded from the surface influence of the increasing crescent surfaces on both sides of the throttle flap shaft, that a nearly constant delay in the flow is effective over the area q of curve a, whereas the delay is less rapid from about 60 onwards, in order to turn into a constant flow depending on the cross section along, in the subsonic range. Therefore, calculations can be performed in range p by using simple gas dynamic equations; the simple Bernouille equation for incompressible media and the continuity law. This is not possible in portion q of curve a. As in portion q the speeds, in case of reducing throttle flap position angles, approach the transsonic range to sonic speed, the pressure function P /dp/s in compressible flows becomes effective.
  • the pulsating-turbulent flow permanently existing already in the carburetor throat receives an increase in pulsation in the throttle flap area, which is indicated e.g. by a rocking motion of the fuel film at the wall of the carburetor duct.
  • a throttle flap according to FIG. 1 has a different flow path in case of throttle flap swivel angles of a 0 to
  • the gap surface at the rim side, with gap width s,, has a constant value to swivel angles of up to e.g. 15; i.e. dF/da 0.
  • the throttle flap according to FIG. 1 enables fine fuel atomization to the maximum and acts against the formation of deposits on the wall.
  • the wall deposit consists of the reluctantly evaporating portions in the fuel, i.e., of portions with high boiling points.
  • the invention uses this possibility of a preparation of liquid fuel portions by applying the known flow processes in rough tubes.
  • a pulsating tubulent flow has, in the boundary layer at the wall, a fine and very thin laminar underflow, which is the carrier of those fuel portions that remain liquid.
  • the roughness height required in order to dissolve a laminar flow is known from resistance measurements performed on rough tubes, as outlined in the literature listed under 3 below.
  • Reynolds numbers of 2 X. [0 to 2 X 10 occur in the suction tubes of carburetors.
  • the critical Reynolds number for the change of a laminar flow into a turbulent one is at 2300 in the case of circular tubes. It can be seen from the diagram for the resistance number in the case of rough tubes, in the literature referenced in 3 below, that a roughness height of 0.5 to 0.8 is required for the existing Reynolds Nos., at suction tube diameters of state-of-the-art carburetors, in order to dissolve the laminar underflow at the wall of a carburetor suction tube.
  • the liquid film of reluctantly evaporating portions of the fuel is torn when flowing over the rough passage of the jet-type insert according to FIG. 3.
  • a ram collar effect occurs, which directs the torn liquid portions into the main flow and pulls them away with the overall flow.
  • the preferably conical entry passage of the insert according to FIG. 3 accelerates the main flow and actually compensates for the braking vorticity losses of the dissolving wall stream.
  • the simplest method would be to toughen the jet-type insert according to FIG. 3 by the arrangement of a fine-thread, having a thread pitch h of a suitable profile.
  • the task of the invention is fulfilled, in particular as far as the modification of operating motor vehicles is concerned, if the standard disc-type throttle flap of a carburetor of the state-of-the-art, is replaced by a throttle flap according to FIGS. 1 and 2, and if a ram jet according to FIG. 3 is installed below the carburetor, to the suction duct to the cylinders. Installation and maintenance of both devices presents no problem to workshop and customer. No adjustments can be performed on the devices, so that the effect of these devices is independent of the motor vehicle running time. Both devices are independent of the motor vehicle make, and also of the carburetor manufacturers.
  • throttle flap 111 is made from permeable i.e., porous material, a selectable filter effect can be reached, depending on the degree of porosity, so that, as the case may be, bore 16 in the throttle flap may no more be required.
  • a porous throttle flat from sintered metal can then be easily fabricated, particularly in mass production.
  • a flow gap (s) exists between the throttle flap and the carburetor duct and is within the limits of preferably 0.05 0.08 mm.
  • said roughness height (h,) is made by a fine thread with preferably sharp-edged thread profile.
  • said ramjet means is arranged below the carburetor with its flange between the carburetor and the suction duct to the engine cylinders and is sealed by a lower packing which has a hole equal in diameter to the flange diameter and an upper packing which has a hole equal in diameter to the carburetor duct, said ramjet means being rounded at the entry of surface (F 14.
  • said throttle flap is made of porous permeable material.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Lift Valve (AREA)
  • Fuel-Injection Apparatus (AREA)
US00280229A 1971-08-16 1972-08-14 Device for the implementation of procedures for the decontamination of internal combustion engine exhaust gases Expired - Lifetime US3785628A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2140910A DE2140910C3 (de) 1971-08-16 1971-08-16 Drosselklappe für Vergaser von Brennkraftmaschinen

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US (1) US3785628A (xx)
JP (1) JPS524683B2 (xx)
AT (1) AT336960B (xx)
BE (1) BE787616R (xx)
CH (1) CH575073A5 (xx)
DE (1) DE2140910C3 (xx)
FR (1) FR2150022A6 (xx)
GB (1) GB1406842A (xx)
IT (1) IT1048402B (xx)
LU (1) LU65909A1 (xx)
NL (1) NL7211107A (xx)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3914350A (en) * 1973-08-13 1975-10-21 Hyundai Motor Co Ltd Carburetor throttle valve with fuel re-sprayer
US3930473A (en) * 1974-04-15 1976-01-06 Edelbrock Equipment Company Manifold for internal combustion engines having steps in the walls of the manifold runners
US4281632A (en) * 1979-02-21 1981-08-04 Chrysler Corporation Throttle body and mixing tube
US4297302A (en) * 1978-10-07 1981-10-27 Nissan Motor Company, Limited Butterfly throttle valve with a raised upper lip
US4356801A (en) * 1981-02-02 1982-11-02 Chrysler Corporation Throttle body fuel injection
US4377538A (en) * 1980-07-11 1983-03-22 Aisan Industry, Co., Ltd. Variable venturi type carburetor
US4462358A (en) * 1981-05-25 1984-07-31 Mikuni Kogyo Kabushiki Kaisha Throttle valve
WO2002014721A1 (en) * 2000-08-16 2002-02-21 Visteon Global Technologies, Inc. Rotatable airflow control mechanism and method of manufacturing
US20130273831A1 (en) * 2012-04-12 2013-10-17 Airfixture Llc Damper vane and housing construction
US20190085998A1 (en) * 2017-09-20 2019-03-21 Copreci, S. Coop. Electromagnetic Gas Valve, Gas Regulating Valve and Gas Cooking Appliance
US11549429B2 (en) * 2018-01-12 2023-01-10 Transportation Ip Holdings, Llc Engine mixing structures
US11608803B2 (en) 2021-07-07 2023-03-21 Transportation Ip Holdings, Llc Insert device for fuel injection
US11725619B2 (en) 2021-02-23 2023-08-15 Transportation Ip Holdings, Llc Alignment system and associated method
US11781469B2 (en) 2021-08-12 2023-10-10 Transportation Ip Holdings, Llc Insert device for fuel injection

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2265997A1 (xx) * 1974-03-29 1975-10-24 Reissmueller Anton
FR2420660A1 (fr) * 1978-03-20 1979-10-19 Gaylord James Dispositif d'admission pour moteur a combustion interne
JPS60156756U (ja) * 1984-03-28 1985-10-18 株式会社　フジ電科 気密端子
JPS60162378U (ja) * 1984-04-04 1985-10-28 株式会社　フジ電科 気密端子
JPH0357019Y2 (xx) * 1984-10-08 1991-12-25
JPH0338053A (ja) * 1989-07-05 1991-02-19 Goto Seisakusho:Kk 半導体装置及びその製造方法
JPH0362953A (ja) * 1989-07-31 1991-03-19 Nippon Dempa Kogyo Co Ltd 電子部品の表面実装型容器
JPH03177054A (ja) * 1989-12-05 1991-08-01 Goto Seisakusho:Kk 半導体装置の製造方法
GB2245931A (en) * 1990-07-10 1992-01-15 Rover Group I.c. engine air intake throttle body
FR2674573B1 (fr) * 1991-03-29 1993-07-09 Solex Corps de papillon pour dispositif d'injection de combustible.
CN103192228B (zh) * 2013-04-03 2015-11-25 昆山通塑机械制造有限公司 钢带滚花装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2095263A (en) * 1936-04-25 1937-10-12 Gen Electric Butterfly valve
US2109296A (en) * 1931-10-14 1938-02-22 William E Leibing Fuel control apparatus
GB507977A (en) * 1938-07-15 1939-06-23 Alexander Abramson Improvements in or relating to down draught carburettors for internal combustion engines
US3057606A (en) * 1960-03-31 1962-10-09 California Research Corp Carburetor
US3176704A (en) * 1961-11-20 1965-04-06 Universal Oil Prod Co Carburetor throttle valve
US3298677A (en) * 1964-04-20 1967-01-17 Champion Spark Plug Co Throttle valve for internal combustion engines
US3393984A (en) * 1967-02-14 1968-07-23 Franklin O. Wisman Fuel system components
US3414242A (en) * 1965-12-30 1968-12-03 Bouteleux Rene Device for balanced homogenization of air and liquid fuel mixtures in internal combustion engines
US3559963A (en) * 1968-12-03 1971-02-02 Oscar R Cedarholm Atomization and fuel cutoff carburetor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1842866A (en) * 1924-12-17 1932-01-26 Goudard Maurice Carburetor
AT304184B (de) * 1969-07-03 1972-12-27 Ingbuero Fuer Angewandte Physi Vorrichtung zur stufenweisen Entgiftung von Brennkraftmaschinenabgasen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2109296A (en) * 1931-10-14 1938-02-22 William E Leibing Fuel control apparatus
US2095263A (en) * 1936-04-25 1937-10-12 Gen Electric Butterfly valve
GB507977A (en) * 1938-07-15 1939-06-23 Alexander Abramson Improvements in or relating to down draught carburettors for internal combustion engines
US3057606A (en) * 1960-03-31 1962-10-09 California Research Corp Carburetor
US3176704A (en) * 1961-11-20 1965-04-06 Universal Oil Prod Co Carburetor throttle valve
US3298677A (en) * 1964-04-20 1967-01-17 Champion Spark Plug Co Throttle valve for internal combustion engines
US3414242A (en) * 1965-12-30 1968-12-03 Bouteleux Rene Device for balanced homogenization of air and liquid fuel mixtures in internal combustion engines
US3393984A (en) * 1967-02-14 1968-07-23 Franklin O. Wisman Fuel system components
US3559963A (en) * 1968-12-03 1971-02-02 Oscar R Cedarholm Atomization and fuel cutoff carburetor

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3914350A (en) * 1973-08-13 1975-10-21 Hyundai Motor Co Ltd Carburetor throttle valve with fuel re-sprayer
US3930473A (en) * 1974-04-15 1976-01-06 Edelbrock Equipment Company Manifold for internal combustion engines having steps in the walls of the manifold runners
US4297302A (en) * 1978-10-07 1981-10-27 Nissan Motor Company, Limited Butterfly throttle valve with a raised upper lip
US4281632A (en) * 1979-02-21 1981-08-04 Chrysler Corporation Throttle body and mixing tube
US4377538A (en) * 1980-07-11 1983-03-22 Aisan Industry, Co., Ltd. Variable venturi type carburetor
US4356801A (en) * 1981-02-02 1982-11-02 Chrysler Corporation Throttle body fuel injection
US4462358A (en) * 1981-05-25 1984-07-31 Mikuni Kogyo Kabushiki Kaisha Throttle valve
WO2002014721A1 (en) * 2000-08-16 2002-02-21 Visteon Global Technologies, Inc. Rotatable airflow control mechanism and method of manufacturing
US20130273831A1 (en) * 2012-04-12 2013-10-17 Airfixture Llc Damper vane and housing construction
US9127854B2 (en) * 2012-04-12 2015-09-08 Airfixture Llc Damper vane and housing construction
US20190085998A1 (en) * 2017-09-20 2019-03-21 Copreci, S. Coop. Electromagnetic Gas Valve, Gas Regulating Valve and Gas Cooking Appliance
US10801639B2 (en) * 2017-09-20 2020-10-13 Copreci, S. Coop. Electromagnetic gas valve, gas regulating valve and gas cooking appliance
US11549429B2 (en) * 2018-01-12 2023-01-10 Transportation Ip Holdings, Llc Engine mixing structures
US11725619B2 (en) 2021-02-23 2023-08-15 Transportation Ip Holdings, Llc Alignment system and associated method
US11608803B2 (en) 2021-07-07 2023-03-21 Transportation Ip Holdings, Llc Insert device for fuel injection
US11781469B2 (en) 2021-08-12 2023-10-10 Transportation Ip Holdings, Llc Insert device for fuel injection

Also Published As

Publication number Publication date
JPS524683B2 (xx) 1977-02-05
DE2140910B2 (de) 1976-12-09
FR2150022A6 (xx) 1973-03-30
NL7211107A (xx) 1973-02-20
DE2140910C3 (de) 1981-06-11
ATA705872A (de) 1976-09-15
IT1048402B (it) 1980-11-20
AT336960B (de) 1977-06-10
LU65909A1 (xx) 1973-01-15
CH575073A5 (xx) 1976-04-30
BE787616R (fr) 1972-12-18
GB1406842A (en) 1975-09-17
JPS4828830A (xx) 1973-04-17
DE2140910A1 (de) 1973-03-01

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