• 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:
    The fuel flow control device is screwed in the tapped hole (3) of the carburettor (4) for the idling nozzle. A fuel line (20) connects the carburettor float housing to the tapped hole (3). In addition a vacuum line (21) is arranged between the carburation chamber and the fuel-air mixture inlet of the engine. The device has a closing body (17) movable in a chamber between two valve seats (8, 12), the actuating means (25) of which body are designed in such a way that when the engine is idling none of the valve seats (8, 12) is closed and that the first of the valve seats is closed at increased engine speed when the carburettor valve flap (23) is opened, whilst the closing body (17) rests on the second valve seat (12) when the engine speed is reduced due to sudden closure of the carburettor valve flap (23). Due to the fact that the full quantity of fuel can flow to the engine by way of an orifice (9) only when idling and the flow is interrupted or reduced in the case of a high or suddenly reduced speed, the fuel consumption can be reduced and combustion conditions improved. <IMAGE>
    公开号:SU736883A3
    申请号:SU762396654
    申请日:1976-09-03
    公开日:1980-05-25
    发明作者:Ро Жан；Бийа Жорж；Ренар Андре
    申请人:За витель Иностранец Жан Ро (Франци ) Иностранцы (Франци ) К ПАТЕНТУ (61) Дополнительный к патенту - (22) За влено 03.09.76 (23) Приоритет - 7527676；
    IPC主号:
    专利说明:

    (54) DEVICE FOR FUEL FLOW MANAGEMENT IN CARB DURING SYSTEM
    one
    The invention relates to engine construction, in particular, to devices for controlling the flow of fuel in a carburetor metering system.
    Arrangements are known for controlling the flow of fuel in a carburetor dosing system for an internal combustion engine, comprising a housing connected by thread to a carburetor housing element and forming a cylindrical chamber associated with at least one radial channel and two axial channels formed at different ends of the chamber, having a saddle surface and serving for the passage of air and the mixture, respectively, and a locking member provided with two locking end surfaces for the saddles of the axial channel and associated with the body placed in the bore through the spring-loaded rod disposed in the housing with a clearance forming an annular channel for air supply 1.
    However, in the known devices, it is not possible to control the mixture composition in all engine operating modes, in connection with
    than exhaust gases have toxic components.
    The aim of the invention is to improve the accuracy of fuel metering and the reduction of engine exhaust emissions.
    This is achieved by the fact that the rod at the end opposite to the locking member is provided with a piston that is displaceable in the bore of the housing, connected to the atmosphere and with an annular channel for supplying air, and a longitudinal opening is provided in the piston for air passage.
    The proposed device differs from the known ones in that the spring is placed concentrically with the stem and is located between the piston and the housing, and the locking member and the stem are equipped with a device for rotation, the latter can be formed by profiled blades integral with the stem. In addition, the housing from the side of the thread is provided with a cylindrical nozzle, the internal cavity of which forms a cylindrical chamber.
    FIG. I shows in section the proposed device for controlling the flow of fuel in the carburetor metering system; in fig. 2 - device execution variant; in fig. 3 shows an embodiment of the closure member and stem; in fig. 4 is a view along arrow A in FIG. 3; in fig. 5 shows an embodiment of the housing.
    Depicted in FIG. 1, a device for controlling the flow of fuel in a carburetor metering system for an internal combustion engine comprises a housing 1 connected with a thread 2 to a carburetor body 3 and provided with a cylindrical nozzle 4 forming a cylindrical chamber 5 connected by radial holes 6 and 7, respectively made in the housing 1 and the nozzle 4, and two axial channels (holes) 8 and 9 with 5 at the different ends of the chamber, having saddle surfaces 10 and 11, respectively, on the housing 1 and the nozzle 4, and the locking member 12, provided with two locking end surfaces 13 and 14 for the saddle surfaces 10 and 11 and associated with a stem 15 passing in the opening 8 of the housing 1 with a gap forming the annular channel 16. The stem 15 at the end opposite to the stop member 12 is provided with a gear 17, which is movably disposed in a bore 18, made in housing 1 and connected on one side with an annular channel 16, and on the other with an atmosphere. In the bore 18 of the housing 1, a loading spring 19 of the locking member 12 is placed, which is placed between the piston 17 and the housing 1 concentric with the rod 15.
    An axial channel 9 connects the cylindrical chamber 5 to the fuel channel 20 connected to the fuel chamber (not shown) of the carburetor, and the radial holes 6 and 7 connect the cylindrical chamber 5 to the channel 21 of the carburetor idling system. The channel 21 in the upper part is connected to the carburetor mixing chamber 22 by means of the hole 23, and in the lower part - to the throttle space 24 by means of the holes 25 and 26, in the latter of which there is an adjusting screw 27. In the carburetor in the area of the holes 25 and 26 a rotary throttle valve 28 is installed. The load spring 19 is designed so that when the engine is not running, the locking member 12 is located between the saddle surfaces 10 and 11 (as shown in Fig. 1).
    The operation of the device occurs in the following way ...
    When the internal combustion engine starts and it runs at idle speed, the air that is sucked into the engine is passed through channel 2t, creating radial holes 6 and
    736883
    7, a vacuum in the cylindrical chamber 5, as a result of which fuel is sucked in through the opening 9 from the fuel chamber through the fuel channel 20. The latter, displaced by the passing air, forms a top-of-the-air mixture, which through openings 25 and 26 enters the throttle space 24 and is directed further into the engine cylinders. At the same time, the rarefaction, the flow through the annular channel 16 is transmitted to the bore 18 of the housing 1 and this vacuum
    This acts on the piston 17, but the spring 19 prevents the latter from moving inside the housing 1, as a result of which the locking member 12 is held between the saddle surfaces 10 and 11. As a result, a fuel-air mixture enters channel 21, the composition of which ensures stable operation of the engine during operation. idle move.
    As the engine speed increases (with the throttle valve closed) 28) above idling speed, the vacuum in the cylindrical chamber 5 increases and the vacuum in the bore 18 increases, and therefore the force acting on the piston 17 exceeds the force of the spring 19. The piston 17 moves into the body I and through the rod 15 moves the locking member 12 up to the stop of the end surface 14 into the saddle surface P. The locking member 12 thus blocks the axial bore 9, stopping the flow of fuel from the fuel channel 20 into the cyl Indra chamber 5. In connection with this, through the channel 21 only air is passed into the throttle space 24 and the fuel supply to the engine cylinders is stopped.
    When the engine speed is again reduced to the idling speed, the vacuum inside the cylindrical chamber 5 will decrease, and the spring 19 will push the piston 17, and with it the locking member 12 away from the saddle surface And, therefore the cylindrical chamber 5 will again be connected through the opening 9 with the fuel channel 21, and the fuel-air mixture will start to enter the engine cylinders, as described above.
    When the engine speed falls below idling speed, the pressure in the cylindrical chamber 5 increases and 19 will move the piston 17 with the brush 15 and
     shut-off the flange 12 until the stop of the end surface 13 into the saddle surface 10 of the housing 1, thereby disconnecting the cylindrical chamber 5 from the annular channel 16 and the radial holes 6 and 7. Therefore, in
    5, the air passing through the duct 21 stops the flow of fuel from the cylindrical chamber 5, and only the air enters the throttle space 24 and into the engine cylinders.
    In this way, the fuel supply is stopped both when the idling speed is exceeded and when they are lowered, and therefore the accuracy of fuel metering is improved and the exhaust gas toxicity is reduced.
    In the FIG. In the second embodiment of the device in the housing 1, a hole 29 is made for supplying additional air through the annular channel 16. At least one longitudinal hole 30 in the piston 17 can also be provided for supplying additional air.
    When the engine is operating, through the openings 29 and 30 and the annular channel 16 additional air enters the channel 21, while the amount of additional air depends on the operating mode of the engine (i.e., the vacuum in channel 21). Additional air provides the subsequent decrease in toxicity of the fulfilled gases.
    It is possible to release a device in which the closure member and the stem are provided with means for ensuring rotation.
    This device, as shown in FIG. 2, is formed by a load spring 19. Air passing through the longitudinal bore 30 of the piston 17 and the bore 18 acts on the spiral surface of the load spring 19, in connection with which the rod 15 and the locking member 12 receive rotation. This makes it possible to ensure a uniform distribution of the fuel over the surfaces of the device where it passes, which improves the evaporation of the fuel and the uniformity of the resulting air-fuel mixture. In addition, this device for rotation can be formed by profiled blades (not shown), made in one piece with the rod 15 and located in the channels of the housing 1. These profiled blades flow around the air flow, and therefore they work as turbine blades and drives the rotation of the slit 15 with the locking member 12.
    In the embodiment shown in FIG. 3 of the embodiment of the closure member 12, the latter has projections 31 on one of the end surfaces separated by slots 32 (see also Fig. 4).
    When the device is in operation, the protrusions 31 do not allow the locking member 12 to block the axial channel 9. At the same time, if the locking member 12 and the stem 15 rotate, these protrusions whirl the flowing fuel flow, and therefore the effect of the rotation device is improved. In addition, the flow around the flow of fuel of the closure member 12, having a larger diameter than the brush 15, provides an increased surface for evaporation of the fuel, which also contributes to improved movement of the fuel and air.
    i-In depicted in FIG. 5 of the embodiment of the device, the body 33 of the latter is integrally formed with a cylindrical tip and has a smooth longitudinal hole 34, ending with an axial hole 35, which is connected in the carburetor to the fuel channel 20. Radial holes 36 are made in the housing 33 and connected to the channel 21 in the carburetor In this part of the longitudinal hole 34, adjacent to the axial hole 35, forms
    the cylindrical chamber 5, and the housing 33 has a thread 37 for connection with the carburetor body element 3.
    This embodiment of the housing 33 improves its manufacturability. At the same time, arrows 38, 39 and 40 show the directions of the respective main and additional air fuel flows occurring during operation of the device.
    Thus, such an embodiment of the device for controlling the flow of fuel in the carburetor metering system provides; Stopping the supply of fuel to the intake air, both when idling is exceeded and when the speed is reduced below a predetermined level, also improves fuel evaporation and mixing of the latter with air, thereby increasing the accuracy of fuel metering to the engine and reducing the toxicity of exhaust gases.
    权利要求:
    Claims (6)
    [1]
    1. An apparatus for controlling the flow of fuel in a carburetor metering system for an internal combustion engine, comprising: a housing connected by means of a thread to a carburetor housing element and forming a cylindrical chamber,
    related to. with at least one radial channel and two complete
    . at different ends of the chamber are axial channels having saddle surfaces and serving for the passage of air and mixture, respectively, and a locking member provided with two locking end surfaces for the Chedon of the axial channels and connected to a load spring placed in the bore of the body through a rod located in the body with gap forming
    An annular channel for the supply of atmospheric air, characterized in that, in order to improve the accuracy of the dosing of fuel supply to the engine and reduce the toxicity of exhaust gases, the rod at the end opposite to the shut-off member is equipped with a piston arranged for movement in the bore of the housing connected to the atmosphere and with an annular channel for the supply of air.
    [2]
    2. A device according to claim I, characterized in that a longitudinal opening is made in the piston for the passage of air.
    [3]
    3. The device according to paragraphs. 1 and 2, characterized in that the spring is arranged concentrically to the rod and is located between the piston and the housing.
    [4]
    4. Device on PP. 1-3, characterized in that the locking member and the stem are provided with means for ensuring rotation.
    [5]
    5. The device according to claim 4, characterized in that the device for ensuring rotation is formed by profiled
    blades, made at the same time the whole with the rod.
    [6]
    6. The device according to PP. 1-5, characterized in that the case on the side of the thread is provided with a cylindrical nozzle, the internal cavity of which forms a cylindrical chamber.
    Priority points:
    09.05.75 on PP. 1, 3 and 6
    10/07/75 in paragraphs 4 and 5
    04.06.76po n. 2. Sources of information
    taken into account in the examination 1. US patent No. 342387, cl. 261-41, published. 1962.
    /five
    thirty
    FIG.
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    同族专利:
    公开号 | 公开日
    DK401576A|1977-03-06|
    OA05431A|1981-03-31|
    CH622064A5|1981-03-13|
    DE2639069C2|1982-07-15|
    CA1046364A|1979-01-16|
    GB1535403A|1978-12-13|
    PT65555B|1978-03-28|
    JPS5237633A|1977-03-23|
    JPS5726652U|1982-02-12|
    DE2639069A1|1977-03-17|
    SE7609784L|1977-03-06|
    BR7605900A|1977-08-16|
    SE423125B|1982-04-13|
    DD127371A1|1977-09-21|
    PT65555A|1976-10-01|
    NL7609687A|1977-03-08|
    AR209195A1|1977-03-31|
    ES451208A1|1977-12-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1996308U|1968-05-15|1968-11-07|Ernst Bauch|IDLE THROTTLE FOR CARBURETOR OF COMBUSTION ENGINE|JPS53165124U|1977-05-31|1978-12-25|
    FR2425554B1|1978-05-10|1983-02-25|Beaucaron Jerome De|
    FR2462566B2|1978-12-01|1985-03-22|Gaget A|
    FR2442971B1|1978-12-01|1983-07-22|Gaget A|
    DE3261665D1|1982-03-05|1985-02-07|Pierburg Gmbh & Co Kg|Regulating screw for a mixture formation device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7527676A|FR2312662B1|1975-09-05|1975-09-05|
    FR7530627A|FR2327412B1|1975-10-07|1975-10-07|
    FR7616913A|FR2353717B2|1976-06-04|1976-06-04|
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