• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1482569 Spray carburetters HONDA GIKEN KOGYO KK 6 Nov 1974 [7 Nov 1973] 48046/74 Heading F1H The choke valve 20 of a carburetter 16 in an assembly 14 for supplying a mixture to a main combustion chamber 4 and a richer mixture to a pre-combustion chamber 6 is fully opened by a device 44 when the engine is operating. The valve 20 is biased closed by a spring 48 and opened by a diaphragm 46 subject to the suction downstream of the throttle valve 22. The choke valve 19 of the main carburetter 15 of the assembly may be controlled by a bi-metal strip 28, heated by an electric heater, and a suction responsive device 33 or by a manually operated cable (66), Fig. 2 (not shown). In the latter case the valves 19 and 20 have a lost-motion connection (68 and 69), so that the valve 19 may be fully opened without opening the valve 20. The valve 20 is biased closed by a spring and the device 44 has a lostmotion connection (45, 70) to the valve.
    公开号:SU735187A3
    申请号:SU742079548
    申请日:1974-11-06
    公开日:1980-05-15
    发明作者:Ийяма Масахико；Камезаки Такаси
    申请人:Хонда Гикен Когио Кабусики Кайся (Фирма)；
    IPC主号:
    专利说明:

    I
    This invention relates to the field of engine construction and, in particular, to carburetors.
    Carburetors for an internal combustion engine are known, comprising a housing with main and additional flow channels forming the mixing chambers, main and additional throttles, kinematically interconnected, main and additional air dampers eccentrically located on the axes in the flow channels, vacuum drive, connected to the throttle - the main space of the main flow channel and connected via a cable to the first lever mounted on the axis of the main air damper and bound in with the control actuator, and a second arm disposed on the axis of the additional vozduschnoy za- slonki and associated with the closure device 1 of the last.
    However, in such carburetors, the quick opening of the air dampers after the start of rotation of the engine's engine is not ensured during start-up, and therefore the composition of the mixture entering the engine cylinders is not optimal, and complete combustion of the fuel is not achieved.
    This is especially important for the internal combustion engine with a pre-chamber, in which the core of the new carburetor flow channel is designed to power the main engine combustion chamber, and the additional carburetor channel is for the pre-chamber.
    The aim of the invention is to improve the technical and economic performance of the engine.
    The goal is achieved by installing a vacuum servo on the case, which is connected to the throttle space of the additional flow channel and connected with the second lever of the additional air damper to ensure the latter is open after the engine is started, and the third {ejag having a limiting stop for the second lever, and the device for closing the additional air damper is made in the form of a coil spring concentric with respect to its axis one power end of which is connected to the second lever, and the other to the third. .
    The proposed carburetor differs from that also known by the fact that the vacuum servo is connected to the second lever via the third lever, and the fourth lever is freely mounted on the axis of the main air damper, which has a limiting stop for the first lever and is connected to it The actuator is made in the form of a manual control cable connected to the fourth lever.
    In addition, the proposed carburetor differs from the known ones in that the vacuum drive and the servo drive are connected respectively to the first and second levers via free-angle hinges, and the third and fourth levers are interconnected by means of a free-wheel and tie rod.
    FIG. I depicts the proposed carburetor for an internal combustion engine; in fig. 2 shows an embodiment of a carburetor .-,
    Depicted in FIG. 1 The carburetor for internal combustion engine 1 comprises a housing 2 with a main 3 and an additional 4 flow channels forming the mixing chambers, a main 5 and an additional 6 throttle valves, a main 7 and an additional 8 air dampers eccentrically located on axes x 9 and 10 in the flow channels 3 and 4, a vacuum actuator 11 connected through pu 12 to the first lever 13 mounted on the axis 9 of the main air damper 7 and connected via pu 14 to the control actuator, and a second lever 15 placed on the axis 10 in addition air damper 8 and associated with the closing device last.
    The main throttle valve 5 is mounted on a drive axle 16, on which is attached a drive lever 17 connected to a cable 18 connected to the accelerator pedal-. torus (not shown), and equipped with a stop 19 for an adjusting screw 20 mounted on housing 2. The drive lever 17 is loaded with a torsion spring 21, the force of which is directed toward closing the main throttle valve 5. On the drive axis 16 there is also a lever 22, in contact with one of its shoulders with an anvil 19 and through tgu 23 connected with a drive lever 24, fixed on the drive axle 25 of the additional throttle valve 6 and loaded with a torsion spring 26, the force of which is directed in the direction of closing additional The throttle valve 6. The drive lever 24 is provided with a stop 27 for the adjusting screw 28, mounted on the housing 2. The drive lever 17, the lever 22 and the drive lever 24 form a kinematic link between the drive axes 16 and 25 of the main 5 and the additional 6 throttle valves .
    The vacuum drive 11 has a membrane 29 rigidly connected to the pull 12 and loaded. 7351
    spring 30, and the working chamber 31 connected via pipe 32, fitting 33 and holes 34 in housing 2 to the throttling space of the main flow channel 3. T he 12 is in contact with
    5 by one of the p / leaks of the first lever, the second arm of which is connected with a pull 14 connected to the control actuator. The latter is made in the form of a bimetallic spring 35 installed in the casing 36 and having an electric heater (not shown in the drawing). The outer end of the bimetallic spring 35 is connected with a protrusion 37 placed inside the case 36, which is made on the case 2, and its inner end is connected to a pivot pin 38 fitted on
    j protruding from the casing 36 by the lever 39 associated with the thrust 14.
    The device for closing the additional air damper 8 is made in the form of a coil spring concentric with the axis 10, one power end of which is connected with the second lever 15 and the other with the third lever 41, which is freely mounted on the axis 10. The third lever 41 has a limiting stop 42 for the second lever 15 and is connected with a pull 43 of the vacuum servo 44 mounted on the housing 2. The vacuum servo 44 has a diaphragm 45 rigidly connected to the pull 43 and loaded by a spring 46, and a working chamber 47 connected by and pipe 48, schtutsera 49 and the holes 50 in the housing 2 to the throttle space of the additional flow channel 4.
    Each cylinder of the engine 1 has a main combustion chamber 51, the inlet channel 52 of which is connected to the main carburetor flow channel 3, and a pre-chamber 53, the inlet channel 54 of which is connected to an additional flow channel 4. The forging chamber 53 is connected to the main combustion chamber 51 through the channel 55. In the prechamber 53
    0 a spark plug 56 is installed. In this case, the combined mixture is supplied from the main flow channel 3 of the carburetor, and from the additional 4 - enriched. The work of the carburetor is as follows.
     -Before starting the internal combustion engine, when the shaft is not rotating, atmospheric is created in the working chambers 31 and 47 of the vacuum drive 11 and servo drive 44.
    - pressure. As a result, under the force of a spring of 30 tons ha 12, the first lever 13 is rotated so that the main air damper 7 blocks the flow section of the main flow channel 3. When the engine 1 is cold, the bimetallic spring 35 sets the lever 39 to the extreme upper position and not prep Installing the main air damper 7 to the fully closed position. But if the engine temperature is relatively high, then the bimetallic spring 35 prevents the main air damper 7 from fully closing. Simultaneously under the action of a spring pressure of 46 tons ha 43, the third lever 41 moves towards the closing of the additional damper 8. The lever 41 acts on the helical spring 40. the second lever 15 and translates it with the axis 10 and the additional air damper 8 in the closing position of the latter. The main 5 and additional 6 throttle flaps are installed before start-up with cable 18. When the shaft rotates during engine start with a handle or starter, the main 7 and additional 8 air flaps are in the closed position from the flow channels 3 and 4 of the carburetor into the pre-chamber 53 and the main combustion chamber 51 enters the enriched fuel-air mixture. The mixture is enriched with those. The higher the lower the temperature of the engine 1. Fast. The mixture in the cylinder is compressed, and as a result of compression, a part of the mixture from the main combustion chamber 51 is compressed into the prechamber 53, and a charge is formed in the latter that easily ignites the spark plug 56 at the end of the compression stroke. After ignition of the charge in the prechamber 53, as a result of the increase in pressure in it, the flame passes through channel 55 to the main combustion chamber 51 and ignites the poorer charge in it, in which the fuel completely burns out at the beginning of the stroke. Since the cold mixture enters the cylinders when the engine is started, a reliable start of the engine 1 is achieved. With further rotation of the engine shaft from the handle or starter, the pressure in the flow channels 3 and 4 is reduced due to the closed position of the air dampers 7 and 8, resulting in vacuum the actuator 11 and the servo drive 44 open the air dampers 7 and 8, thereby preventing excessive enrichment of the mixture entering the engine cylinders. When the engine shaft begins to rotate as a result. The fuel energy received and the shaft speed stabilize, a vacuum is generated in the throttling spaces of the flow channels 3 and 4, which is transmitted to the working chambers 31 and 47, causing the membranes 29 and 45 to pull inwards. The membrane 29 retracts from the first lever 13, and the position of the main air damper 7 is then determined only by the force of the bimetallic spring 35. The membrane 45 through the tractor 43 t does not have the third lever 41, which by its stop 42 displaces the second lever 15, and together with it and an additional air damper 8 to the position of complete opening of the additional flow channel 4, in which the formation of the fuel-air mixture with cocjaBOM, determining the normal operation of the engine, is ensured. However, due to the small size of the pre-chamber 53, the latter manages to quickly warm up in the initial period of the engine start-up, due to which all the fuel entering it is used and there is no excessive depletion of charge in it, which is easily ignited by a spark. Simultaneously with the stabilization of the shaft revolutions and the disconnection of the means for rotating the shaft, the electric bimetallic spring heater 35 is connected to the current source and the temperature inside the housing 36 begins to rise, thereby deforming the bimetallic spring 35 and starting to move the lever 39 downward, thereby moving the main air damper 7 to the position of complete opening of the main flow channel 3. As the flow cross section of the latter increases, the air-fuel mixture forming in it when fully opened, this mixture is depleted within the limits ensuring reliable ignition of the charge in the prechamber 53 and complete combustion of the fuel in the main combustion chamber 51. Thus, the proposed carburetor ensures reliable start and warming up of the cold engine and complete combustion of the fuel With which the technical and economic indices of the engine are improved. In the embodiment shown in FIG. In the second embodiment of the carburettor on axis 9 of the main air damper 7, the fourth lever 57 is freely mounted, and the control actuator is made in the form of a manual control cable 58 connected to the fourth lever. Axis 9 has a different form of the first lever 59, which is provided with a protrusion 60 and a slot 61. The fourth lever 57 is connected to one end of the spring 62, the other end of which is connected to the housing 2, and has a limiting stop 63 for the protrusion 60 of the first lever 59, which It is connected with the fourth lever 57. with the help of a helical torsion spring 64. The tension of the vacuum actuator 11 of the vacuum drive 11 is 65, which is located in the slot 61 and forms with it a hinge of free angular movement. The second arm 66, which is another form, is rigidly fixed on the axis 10, has a slot 67, and a tractor 43 of the vacuum servo 44 is provided with a pin 68, which is located in the slot 67 and forms with it a hinge of free angular displacement. The third lever 41, loosely mounted on the axis 10, is made in almost the same form as in FIG. 1, is connected to one end of a cable gi 69, the other end of which is provided with a finger 70. In the fourth lever 57 a slot 71 is made in which the finger 70 is located, which together with it forms a free-wheeling hinge.
    The operation of the carburetor shown in FIG. 2, occurs as follows.
    When starting the idle motor with cable 58, the fourth lever 57 is moved clockwise, as a result of which the main damper 7 can be moved to the closed position, and with it the additional air damper can be transferred to the fully closed position by the servo drive 44. However, if the cable 58 does not fully move to cover the main air damper 7, the additional air damper 8 is moved to the fully closed position by means of the spring 46, since the pin 70 of the tip 69 will slide in the slot 71. If there is no movement of the manual control cable 58 or partial when it is displaced, the torsion spring 64, acting on the first lever 57, moves the main air damper 7 to the position of fully or partially opening the flow area of the main flow channel 3, overcoming the spring force 30 vacuum drive 11.
    When the engine shaft is stable during start-up, due to the release of energy from the burning fuel, the additional damper 8 will be opened by a vacuum servo 44 that will move the second lever 66 relative to the third lever 41, while spinning the vivot spring 40; Also, the vacuum actuator 11 will move the main air damper to a position correspondingly with the position of the fourth lever 57, so that the force from the actuator 11 is not balanced, it will strengthen the torsion spring 64.
    Otherwise, the operation of the carburetor shown in FIG. 2 is similar to the operation of the carburetor shown in FIG. one.
    Thus, such a configuration of the carburetor allows the engine to start reliably at low temperatures and to provide the required composition of the mixture entering the cylinders, due to the preset opening of the main and additional air dampers, both during engine warming up and during its operation, due to what increases its technical and economic indicators.
    权利要求:
    Claims (5)
    [1]
    Invention Formula
    . A carburetor for an internal combustion engine, comprising a housing, with primary and secondary flow channels forming the mixing chambers, primary and secondary throttle valves, kinematically interconnected, primary and secondary air
    S dampers, eccentrically located on the axes in the flow channels, a vacuum actuator connected to the throttling space of the main flow channel and connected via a cable to the first lever; mounted on the axis of the main air damper and connected to the control actuator, and a second lever placed on the axis of the additional air damper and connected with a closing device of the latter, characterized in that, in order to improve
    5 of the technical and economic indicators, a vacuum servo drive is installed on the core, connected to the throttle space of the additional flow channel and connected to the second lever of the additional air damper to ensure that the latter is open after the engine is started.
    [2]
    2. The carburetor of claim 1, wherein
    that on an axis additional air
    flap mounted third lever,
    having a limiting stop for the second lever, and the device for closing the additional air damper is made, in the form of a helical spring concentric with respect to its axis, one power end of which is connected with the second lever and the other with the third one.
    0
    [3]
    3. Carburetor on n. 2, characterized in that the vacuum servo is connected to the second lever via a third lever.
    [4]
    4. Carburetor by. 1-3, characterized in that the fourth lever is freely mounted on the axis of the main air damper, having a limiting stop for the first lever and connected to it via an elastic element, and the control actuator is made in the form of a manual control cable connected with the fourth lever .
    0
    [5]
    5. The carburetor according to claim 4, characterized in that the vacuum drive and the servo drive are connected respectively to the first and second steps through free-angle hinges, and the third and fourth levers are interconnected by
    5 t gi and freewheel. V., -. Sources of information received in. attention during examination 1. US Patent No. 3396948,
    5 cl. 261-23, 1968. 62 50S3 Jff 7f
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1075993A3|1984-02-23|Carburettor for internal combustion engine
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    JP2020084867A|2020-06-04|Laminar scavenging two-cycle engine
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    US2158572A|1939-05-16|Automatic engine control
    US4276240A|1981-06-30|Carburetor
    同族专利:
    公开号 | 公开日
    AR207637A1|1976-10-22|
    FR2250027A1|1975-05-30|
    JPS5224603B2|1977-07-02|
    CH592243A5|1977-10-14|
    SE7413956L|1975-05-09|
    NL163304C|1980-08-15|
    NL7414472A|1975-05-12|
    US3967600A|1976-07-06|
    CA1016028A|1977-08-23|
    JPS5074027A|1975-06-18|
    AU7473374A|1975-05-15|
    GB1482569A|1977-08-10|
    DE2452707C3|1978-11-30|
    DD117514A5|1976-01-12|
    BR7409291A|1976-05-11|
    FR2250027B1|1980-04-30|
    DE2452707B2|1978-04-06|
    NL163304B|1980-03-17|
    IT1023094B|1978-05-10|
    DE2452707A1|1975-05-15|
    SE412625B|1980-03-10|
    BE821905A|1975-05-06|
    ES431687A1|1976-09-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3443552A|1966-12-13|1969-05-13|Ernest A Von Seggern|Internal combustion engine,fuel supply system and process|
    US3659564A|1968-11-01|1972-05-02|Toyoda Chuo Kenkyusho Kk|Internal combustion engine with sub-combustion chamber|
    US3785624A|1970-10-12|1974-01-15|Ethyl Corp|Carburetor|
    US3837322A|1973-07-30|1974-09-24|Honda Motor Co Ltd|Carburetor choke|JPS5840015B2|1973-09-07|1983-09-02|Honda Motor Co Ltd|
    JPS5332454B2|1974-08-15|1978-09-08|
    JPS5332456B2|1974-11-06|1978-09-08|
    JPS568602U|1979-06-29|1981-01-24|
    DE10208051B4|2002-02-25|2013-02-28|Andreas Stihl Ag & Co.|Diaphragm carburettor for a combustion engine working with a rinse aid|
    JP2004176634A|2002-11-27|2004-06-24|Walbro Japan Inc|Carburetor for stratified scavenging|
    US7104253B1|2005-03-30|2006-09-12|Walbro Engine Management, L.L.C.|Stratified scavenging carburetor|
    CN102119266A|2008-08-08|2011-07-06|纳格旭·西达帕萨帕·马云纳哈利|Integrally cast block and upper crankcase|
    US8714130B2|2009-10-19|2014-05-06|Nagesh S. Mavinahally|Integrally cast block and upper crankcase|
    US8453998B2|2010-08-17|2013-06-04|Walbro Engine Management, L.L.C.|Air scavenging carburetor|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP12521273A|JPS5224603B2|1973-11-07|1973-11-07|
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