US3916020A - System for controlling pressure by acoustic means - Google Patents
System for controlling pressure by acoustic means Download PDFInfo
- Publication number
- US3916020A US3916020A US361064A US36106473A US3916020A US 3916020 A US3916020 A US 3916020A US 361064 A US361064 A US 361064A US 36106473 A US36106473 A US 36106473A US 3916020 A US3916020 A US 3916020A
- Authority
- US
- United States
- Prior art keywords
- conduit
- pressure
- float chamber
- flow
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- 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
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M5/00—Float-controlled apparatus for maintaining a constant fuel level
- F02M5/08—Float-controlled apparatus for maintaining a constant fuel level having means for venting float chambers
-
- 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
- This invention relates to a method and apparatus for controlling pressure in containers from a periodic acoustic source.
- This invention utilizes the periodic acoustic phenom ena produced by these engines or other acoustic sources to control the pressure in containers where it is required to effect a pressure correction.
- the static positive or negative pressure increases rapidly with the alternating acoustic pressure and depends generally on the geometric features of the container system, the value of the ratio of the pressure loss coefficients, and the frequency of the alternating acoustic pressure of the periodic source.
- a pressure control is effected in a container, such as the float chamber of an internal combustion engine carburetor, from a periodic acoustic source by connecting the container to the acoustic source by means of a conduit constructed so that the pressure losses differ according to the direction of flow through the conduit.
- conduit used in this invention is constructed so that the ratio of the pressure loss coefficients in one direction and the other direction is dif ferent from 1 so that the alternating acoustic pressure passing through the conduit and originating from the periodic acoustic source produces a static positive or negative pressure inside the container depending upon the value other than I of the said ratio.
- a further object of this invention resides in providing a system for controlling pressure in a container from a periodic acoustic source by means of a conduit connecting the container to the acoustic source and so designed that the pressure losses inside the conduit differ according to the direction of flow inside the conduit.
- Another object of this invention is to provide a control conduit for the system of the preceding object wherein the interior of the conduit comprises at least one air jet of the venturi type.
- Still another object of this invention is to provide a control conduit, the inner wall of which comprises a series of steps of different diameters thus producing a very appreciable pressure loss in one direction and a small pressure loss in the other direction.
- FIG. I is a diagrammatic section showing a first embodiment of the invention connecting a carburetor float chamber venting system to the intake of an inter nal combustion engine;
- FIG. 2 is a diagrammatic section of a second embodiment of the invention connecting a carberetor float chamber venting system to the exhaust of an internal combustion engine.
- the air inlet passage 1 and its associated venturi 2 are connected at one end to the air filter 3, of the periodic acoustic sources of an internal combustion engine, and at its other end to the intake manifold of the engine.
- the chamber 4, the float chamber of the carburetor, communicates with the jet 5 through the supply passage 6, the jet 5 discharging at the constricted section of the air passage 1.
- the top part of chamber 4 is connected directly to the interior of air filter 3 by a smooth tube 7 containing two air jets 8 and 9 of the venturi type. Jets 8 and 9 are oriented in tube 7 in such a manner that the pressure loss coefficient for a flow of gas (air in this instance) through conduit 7 and jets 8 and 9 in the direction of chamber 4 is less than the pressure loss coefficient of a flow of the same gas through conduit 7 and jets 8 and 9 in the reverse direction from chamber 4 to the air filter 3.
- the ratio of the pressure loss coefficient in the direction of the acoustic source 3 to the pressure loss coefficient in the direction of chamber 4 is, therefore, greater than unity in the case of FIG. 1.
- the assembly enables the intake resonance effects which would normally result in a mixture richness minimum, which is required to be limited, are counteracted.
- the correction provided by this invention is at all times proportional to the error, since the latter is a function of the amplitude of the alternating pressure which itself modulates the value of the correction.
- the disclosed and claimed invention is the creation of a static pressure within a defined, closed space by connection of a conduit to a source of acoustic, dynamic pulsed pressure outside the space, the conduit having assymetric pressure loss characteristics, that is to say different pressure loss coefficients dependent on direction of flow through the conduit.
- the lid of float chamber 4 includes a conduit machined to provide a series of diameters 11a, llb, and 110 which increase in the outward direction.
- the venting conduit 11 fitted into the largest and outermost diameter 11c,
- a periodic acoustic source may be connected through a flexible tube 12 to a point of the engine where a periodic acoustic source occurs, for example the engine intake or exhaust or any suit able component where the alternating pressure varies according to engine speed.
- the ratio of the pressure loss coefficient in the direction of the acoustic source to the pressure loss coefficient in the direction of chamber 4 is greater than unity and the periodic pressure waves produce a positive pressure in chamber 4 so that the rate of flow of fuel is increased.
- the system and method of controlling pressure in a container in accordance with this invention may be used as illustrated particularly in the case of internal combustion engines to obviate the disadvantages due to intake resonance which may produce a richness maximum or a richness minimum in the air-fuel mixture.
- the system according to the invention may also be used to modify the slope ofa richness curve over a wide operating range. If it is found in a given engine that the mixture richness is excessive over an appreciable range, for example at low engine speeds, the pressure loss in the float venting conduit may be so devised as to produce a negative pressure in the carburetor float chamber, this having the effect of compensating for the excess richness.
- the alternating acoustic source will preferably be a component of the engine where the alternating pressure varies only slightly according to engine speed. In this way the negative pressure produced in the carburetor float chamber by means of the system according to the invention will be practically constant irrespective of engine speed.
- the compensating effect of the system according to the invention will decrease when the speed increases, and in this way it will be possible regularly to reduce the richness of the mixture at low speeds, while retaining the engine operation unchanged at higher speeds.
- the system and the method according to the invention are of particularly advantageous application in controlling carburetion in internal combustion engines and particularly in the carburetor float chamber venting conduits.
- the invention may also be used wherever it is required to carry out pressure control in a container and it is possible to use a periodic acoustic source.
- a method of correcting carburetion errors in internal combustion engines comprising the steps of venting the carburetor float chamber through a conduit whose pressure loss coefficient is different depending upon the direction of flow in the conduit and connecting the conduit to vent the flow chamber to a periodic acoustic source of the engine to establish a preselected static pressure in the float chamber in accord with the direction of flow through the conduit.
- venting conduit is connected to establish a positive static pressure in the float chamber.
- venting conduit is connected to establish a negative static pressure in the float chamber.
- Apparatus for correcting carburetion errors in internal combustion engines comprising a carburetor including a float chamber and an intake passage containing a venturi tube. a fuel supply passage leading from said float chamber to said intake passage. a venturi jet disposed in said intake passage to receive the fuel supplied through said fuel supply passage and deliver the received fuel to the restricted area of said venturi tube. an air filter connected to the intake end of said intake passage. and conduit means interconnecting said float chamber and said air filter. said conduit means having a pressure loss coefficient in one direction of flow different from the pressure loss coefficient in the other direction of flow to establish a preselected static pressure in said float chamber.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Sampling And Sample Adjustment (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
- Pipe Accessories (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Abstract
A system for controlling pressure in a container, for example the carburetor of an internal combustion engine, from a periodic acoustic source, for example the intake or exhaust of the engine or a selected engine component where the alternating pressure varies only slightly according to engine speed where it is desired to modify the slope of a fuel richness curve over a wide operating range. The system is characterized in that it comprises a conduit connecting the container chamber to the acoustic source, the pressure losses being different according to the direction of flow in the conduit.
Description
United States Patent [1 1 Malphettes et al.
[ SYSTEM FOR CONTROLLING PRESSURE BY ACOUSTIC MEANS [75] Inventors: Jean Malphettes; Pierre Fontanet,
both of Versailles, France [73] Assignees: Regie Nationale des Usines Renault;
Automobiles Peugot, France [22] Filed: May 17, 1973 [21] Appl. N0.: 361,064
[30] Foreign Application Priority Data May 29, 1972 France 72.19147 [52] US. Cl 261/72 R; 138/44; 261/D1G. 67 [51] Int. Cl. F02M 5/08 [58] Field of Search 261/72 R, DIG. 67; 138/39,
[56] References Cited UNITED STATES PATENTS 2,732,835 1/1956 Hundt 261/72 R FOREIGN PATENTS OR APPLICATIONS 769,648 3/1957 United Kingdom 261/72 Oct. 28, 1975 Primary Examiner-Donald R. Schran Assistant E.\'aminerZ. R. Bilinsky Attorney, Agent, or Firm-Strauch, Nolan, Neale, Nies & Kurz [57] ABSTRACT 4 Claims, 2 Drawing Figures us. Patent 'O ct.28,1975 Shee't1of2 3,916,020
US. Patent Oct. 28, 1975 Sheet 2 of2 3,916,020
SYSTEM FOR CONTROLLING PRESSURE BY ACOUSTIC MEANS BACKGROUND OF THE INVENTION This invention relates to a method and apparatus for controlling pressure in containers from a periodic acoustic source.
It is well-known that a periodic acoustic phenomenon produces alternating pressure waves. It is also known that in heat engines, and particularly internal combustion engines, there are a large number of sources of pe riodic noise and that there are also pressure control problems, particularly as regards metering of the airfuel mixture in the carburetion of internal combustion engines.
This invention utilizes the periodic acoustic phenom ena produced by these engines or other acoustic sources to control the pressure in containers where it is required to effect a pressure correction.
Furthermore, in internal combustion engines used in motor vehicles, it is well-known that carburetion is frequently disturbed by acoustic phenomena produced by the engines. This invention proposes more particularly to obviate this type of disadvantage by making use of the acoustic phenomenon which produced the disturbance, in order to correct the effects of the latter.
The static positive or negative pressure increases rapidly with the alternating acoustic pressure and depends generally on the geometric features of the container system, the value of the ratio of the pressure loss coefficients, and the frequency of the alternating acoustic pressure of the periodic source.
SUMMARY OF THE INVENTION According to the invention, a pressure control is effected in a container, such as the float chamber of an internal combustion engine carburetor, from a periodic acoustic source by connecting the container to the acoustic source by means of a conduit constructed so that the pressure losses differ according to the direction of flow through the conduit.
More specifically the conduit used in this invention is constructed so that the ratio of the pressure loss coefficients in one direction and the other direction is dif ferent from 1 so that the alternating acoustic pressure passing through the conduit and originating from the periodic acoustic source produces a static positive or negative pressure inside the container depending upon the value other than I of the said ratio.
A further object of this invention resides in providing a system for controlling pressure in a container from a periodic acoustic source by means of a conduit connecting the container to the acoustic source and so designed that the pressure losses inside the conduit differ according to the direction of flow inside the conduit.
Another object of this invention is to provide a control conduit for the system of the preceding object wherein the interior of the conduit comprises at least one air jet of the venturi type.
Still another object of this invention is to provide a control conduit, the inner wall of which comprises a series of steps of different diameters thus producing a very appreciable pressure loss in one direction and a small pressure loss in the other direction.
BRIEF DESCRIPTION OF THE DRAWINGS Other objects will appear from the following description and appended claims when read in conjunction with the accompanying drawings wherein:
FIG. I is a diagrammatic section showing a first embodiment of the invention connecting a carburetor float chamber venting system to the intake of an inter nal combustion engine; and
FIG. 2 is a diagrammatic section ofa second embodiment of the invention connecting a carberetor float chamber venting system to the exhaust of an internal combustion engine.
Referring to the drawings, the air inlet passage 1 and its associated venturi 2 are connected at one end to the air filter 3, of the periodic acoustic sources of an internal combustion engine, and at its other end to the intake manifold of the engine. The chamber 4, the float chamber of the carburetor, communicates with the jet 5 through the supply passage 6, the jet 5 discharging at the constricted section of the air passage 1.
Depending upon the position of the usual manual control butterfly valve (not shown in the drawings), conventionally situated downstream of air passage 1, the flow of air through filter 3 and along the passage 1 produced by operation of the engine creates a vacuum operative to induce a flow of fuel from passage 6 and atomization of the fuel to produce a metered mixture of the fuel from chamber 4 and air from the filter 3.
In the embodiment shown in FIG. 1, the top part of chamber 4 is connected directly to the interior of air filter 3 by a smooth tube 7 containing two air jets 8 and 9 of the venturi type. Jets 8 and 9 are oriented in tube 7 in such a manner that the pressure loss coefficient for a flow of gas (air in this instance) through conduit 7 and jets 8 and 9 in the direction of chamber 4 is less than the pressure loss coefficient of a flow of the same gas through conduit 7 and jets 8 and 9 in the reverse direction from chamber 4 to the air filter 3. The ratio of the pressure loss coefficient in the direction of the acoustic source 3 to the pressure loss coefficient in the direction of chamber 4 is, therefore, greater than unity in the case of FIG. 1. Upon operation of the internal combustion engine, the acoustic alternating pressure waves which appear in air filter 3 and which are transmitted through jets 8 and 9 to chamber 4 result in a positive pressure in chamber 4 to increase the flow of fuel introduced through conduit 6 to the air passage 1.
As a result of this conduit and its association with filter 3 and float chamber 4, the assembly enables the intake resonance effects which would normally result in a mixture richness minimum, which is required to be limited, are counteracted. The correction provided by this invention is at all times proportional to the error, since the latter is a function of the amplitude of the alternating pressure which itself modulates the value of the correction.
In other words, the disclosed and claimed invention is the creation of a static pressure within a defined, closed space by connection of a conduit to a source of acoustic, dynamic pulsed pressure outside the space, the conduit having assymetric pressure loss characteristics, that is to say different pressure loss coefficients dependent on direction of flow through the conduit.
With this in mind, any one of ordinary skill in the art may obtain the desired results of the invention merely by computing the pressure and resolving simple, known mathematical considerations.
Specifically, the parameters to be considered and resolved can be stated as follows:
Simple physics dictates that the formula for determining the pressure difference for a flow directed from the closed space to the outside can be stated:
M2 1, P PTII F Conversely, for a flow from the outside to the closed space;
M2 P Pm "ET Restated:
M) P p 12 Pressure variations versus time according to a known adiabatic law may be stated:
Substituting and solving:
11 112. if P p Again, any one of ordinary skill in the art may obtain the desired result merely by inserting determined values and resolving the derived equation.
DESCRIPTION OF ALTERNATE EMBODIMENT In the alternate embodiment shown in FIG. 2, the lid of float chamber 4 includes a conduit machined to provide a series of diameters 11a, llb, and 110 which increase in the outward direction. The venting conduit 11 fitted into the largest and outermost diameter 11c,
may be connected through a flexible tube 12 to a point of the engine where a periodic acoustic source occurs, for example the engine intake or exhaust or any suit able component where the alternating pressure varies according to engine speed.
It will be apparent from FIG. 2 that the different diameters in machined conduit 11, 110, Ill; and 11a, produce a pressure loss coefficient which is higher in a direction of flow from chamber 4 to the acoustic source.
As in FIG. 1, the ratio of the pressure loss coefficient in the direction of the acoustic source to the pressure loss coefficient in the direction of chamber 4 is greater than unity and the periodic pressure waves produce a positive pressure in chamber 4 so that the rate of flow of fuel is increased.
The system and method of controlling pressure in a container in accordance with this invention may be used as illustrated particularly in the case of internal combustion engines to obviate the disadvantages due to intake resonance which may produce a richness maximum or a richness minimum in the air-fuel mixture. According to the invention it is in fact possible to provide a carburetor chamber venting conduit so that the rate of flow of the fuel is increased in the case where intake resonance results in a mixture richness minimum.
Of course it would also be possible to provide a conduit in which the ratio of the pressure loss coefficients would be less than unity, for example by a reversal of jets 8 and 9 or the series of diameters 11a, 1 1b and 110, so that the alternating pressure waves would in that case produce a negative pressure in the carburetor float chamber. This could be used to obviate a richness maximum produced by an intake resonance.
The system according to the invention may also be used to modify the slope ofa richness curve over a wide operating range. If it is found in a given engine that the mixture richness is excessive over an appreciable range, for example at low engine speeds, the pressure loss in the float venting conduit may be so devised as to produce a negative pressure in the carburetor float chamber, this having the effect of compensating for the excess richness. In that case, the alternating acoustic source will preferably be a component of the engine where the alternating pressure varies only slightly according to engine speed. In this way the negative pressure produced in the carburetor float chamber by means of the system according to the invention will be practically constant irrespective of engine speed.
Since the negative pressure between the chamber and the air tube acting on the rate of fuel flow during normal operation of the carburetor increases with engine speed, the compensating effect of the system according to the invention will decrease when the speed increases, and in this way it will be possible regularly to reduce the richness of the mixture at low speeds, while retaining the engine operation unchanged at higher speeds.
The system and the method according to the invention are of particularly advantageous application in controlling carburetion in internal combustion engines and particularly in the carburetor float chamber venting conduits.
The invention may also be used wherever it is required to carry out pressure control in a container and it is possible to use a periodic acoustic source.
The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive. the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
What is claimed and desired to be secured by Letters Patent is:
l. A method of correcting carburetion errors in internal combustion engines comprising the steps of venting the carburetor float chamber through a conduit whose pressure loss coefficient is different depending upon the direction of flow in the conduit and connecting the conduit to vent the flow chamber to a periodic acoustic source of the engine to establish a preselected static pressure in the float chamber in accord with the direction of flow through the conduit.
2. The method of claim 1 wherein the venting conduit is connected to establish a positive static pressure in the float chamber.
3. The method of claim 1 wherein the venting conduit is connected to establish a negative static pressure in the float chamber.
4. Apparatus for correcting carburetion errors in internal combustion engines comprising a carburetor including a float chamber and an intake passage containing a venturi tube. a fuel supply passage leading from said float chamber to said intake passage. a venturi jet disposed in said intake passage to receive the fuel supplied through said fuel supply passage and deliver the received fuel to the restricted area of said venturi tube. an air filter connected to the intake end of said intake passage. and conduit means interconnecting said float chamber and said air filter. said conduit means having a pressure loss coefficient in one direction of flow different from the pressure loss coefficient in the other direction of flow to establish a preselected static pressure in said float chamber.
Claims (4)
1. A METHOD OF CORRECTING CARBURETION ERRORS IN INTERNAL COMBUSTION ENGINES COMPRISING THE STEPS OF VENTING THE CARBURETOR FLOAT CHAMBER THROUGH A CONDUIT WHOSE PRESSURE LOSS COEFFICIENT IS DIFFERENT DEPENDING UPON THE DIRECTION OF FLOW IN THE CONDUIT AND CONNECTING THE CONDUIT TO VENT THE FLOW CHAMBER TO A PERIODIC ACOUSTIC SOURCE OF THE ENGINE TO ESTABLISH A
2. The method of claim 1 wherein the venting conduit is connected to establish a positive static pressure in the float chamber.
3. The method of claim 1 wherein the venting conduit is connected to establish a negative static pressure in the float chamber.
4. Apparatus for correcting carburetion errors in internal combustion engines comprising a carburetor including a float chamber and an intake passage containing a venturi tube, a fuel supply passage leading from said float chamber to said intake passage, a venturi jet disposed in said intake passage to receive the fuel supplied through said fuel supply passage and deliver the received fuel to the restricted area of said venturi tube, an air filter connected to the intake end of said intake passage, and conduit means interconnecting said float chamber and said air filter, said conduit means having a pressure loss coefficient in one direction of flow different from the pressure loss coefficient in the other direction of flow to establish a preselected static pressure in said float chamber.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7219147A FR2187144A5 (en) | 1972-05-29 | 1972-05-29 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/584,936 Division US4020859A (en) | 1972-05-29 | 1975-06-09 | System for controlling pressure by acoustic means |
Publications (1)
Publication Number | Publication Date |
---|---|
US3916020A true US3916020A (en) | 1975-10-28 |
Family
ID=9099240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US361064A Expired - Lifetime US3916020A (en) | 1972-05-29 | 1973-05-17 | System for controlling pressure by acoustic means |
Country Status (6)
Country | Link |
---|---|
US (1) | US3916020A (en) |
JP (1) | JPS5224607B2 (en) |
DE (1) | DE2323204C2 (en) |
FR (1) | FR2187144A5 (en) |
GB (1) | GB1432461A (en) |
IT (1) | IT987631B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4092380A (en) * | 1976-06-17 | 1978-05-30 | Societe Industrielle De Brevets Et D'etudes S.I.B.E. | Carburetors for internal combustion engines |
US4230646A (en) * | 1978-01-30 | 1980-10-28 | Aquascooter, Inc. | Carburetor device |
US4478764A (en) * | 1982-03-04 | 1984-10-23 | Toyota Jidoshi Kabushiki Kaisha | Air valve type carburetor |
US4726328A (en) * | 1985-08-14 | 1988-02-23 | Yamaha Hatsudoki Kabushiki Kaisha | Induction system for vehicle powered by an air propeller |
US20090197715A1 (en) * | 2008-02-01 | 2009-08-06 | Tai-Her Yang | Continuous variable transmission device with high shift transmission pulley train |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS588933Y2 (en) * | 1976-04-19 | 1983-02-17 | ヤマハ発動機株式会社 | Horizontal ventilation carburetor |
FR2425668A2 (en) * | 1978-05-09 | 1979-12-07 | Renault | ACOUSTICAL PRESSURE ADJUSTMENT DEVICE |
FR2456219A1 (en) * | 1979-05-11 | 1980-12-05 | Sibe | IMPROVEMENTS ON CARBURETORS FOR INTERNAL COMBUSTION ENGINES |
DE4334702A1 (en) * | 1993-10-12 | 1995-04-13 | Opel Adam Ag | Venting device of an internal combustion engine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2732835A (en) * | 1956-01-31 | Ultrasonic |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7039255U (en) * | 1971-08-19 | S I B E | Carburetors for internal combustion engines | |
FR528839A (en) * | 1920-12-20 | 1921-11-19 | Ernest Marie Edmond Jean De Ve | Improvement in carburettors for internal combustion engines |
FR787445A (en) * | 1934-03-16 | 1935-09-23 | Device for starting and operating the cold engine of motor vehicles and airplanes | |
DE689838C (en) * | 1938-01-15 | 1940-04-05 | Alwin Duesterloh Dipl Ing | Spray carburettor with float chamber control |
US2793634A (en) * | 1951-04-02 | 1957-05-28 | Acf Ind Inc | Automatic starting device |
FR1076981A (en) * | 1953-02-14 | 1954-11-03 | App Control Equip Moteurs | Improvements made to fuel systems for internal combustion engines, in particular those for motor vehicle engines |
GB1188783A (en) * | 1968-07-27 | 1970-04-22 | Ford Motor Co | Carburettor. |
-
1972
- 1972-05-29 FR FR7219147A patent/FR2187144A5/fr not_active Expired
-
1973
- 1973-05-08 DE DE2323204A patent/DE2323204C2/en not_active Expired
- 1973-05-14 IT IT24047/73A patent/IT987631B/en active
- 1973-05-17 US US361064A patent/US3916020A/en not_active Expired - Lifetime
- 1973-05-25 GB GB2526173A patent/GB1432461A/en not_active Expired
- 1973-05-28 JP JP48059629A patent/JPS5224607B2/ja not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2732835A (en) * | 1956-01-31 | Ultrasonic |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4092380A (en) * | 1976-06-17 | 1978-05-30 | Societe Industrielle De Brevets Et D'etudes S.I.B.E. | Carburetors for internal combustion engines |
US4230646A (en) * | 1978-01-30 | 1980-10-28 | Aquascooter, Inc. | Carburetor device |
US4478764A (en) * | 1982-03-04 | 1984-10-23 | Toyota Jidoshi Kabushiki Kaisha | Air valve type carburetor |
US4726328A (en) * | 1985-08-14 | 1988-02-23 | Yamaha Hatsudoki Kabushiki Kaisha | Induction system for vehicle powered by an air propeller |
US20090197715A1 (en) * | 2008-02-01 | 2009-08-06 | Tai-Her Yang | Continuous variable transmission device with high shift transmission pulley train |
US8888618B2 (en) * | 2008-02-01 | 2014-11-18 | Tai-Her Yang | Continuous variable transmission device with high shift transmission pulley train |
Also Published As
Publication number | Publication date |
---|---|
FR2187144A5 (en) | 1974-01-11 |
DE2323204C2 (en) | 1981-10-01 |
DE2323204A1 (en) | 1973-12-20 |
IT987631B (en) | 1975-03-20 |
JPS5224607B2 (en) | 1977-07-02 |
GB1432461A (en) | 1976-04-14 |
JPS4954728A (en) | 1974-05-28 |
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