• 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:
    This invention relates to a fuel injection system. The fuel injection system has a fuel proportioning valve (3,4) which is supplied by a fuel feed line (39). The fuel proportioning valve supplies fuel to fuel injection valves (not shown) via a diaphragm valve 25. A differential pressure regulator 35 is provided to alter the pressure in the system in accordance with engine parameters. The pressure in the system is controlled by system pressure valve 41. In operation excess fuel is returned to fuel tank 70. When the engine is switched off a stop valve 63 closes the return line and valve 25 is closed in response to a drop in pressure in the differential pressure regulator 35, thus sealing the system and maintaining the pressure within the fuel supply part of the system to facilitate easy restarting. Seals 73 are provided in the fuel proportioning valve (3,4) to prevent fuel leakage from the seal part of the system between the valve 3 and valve cylinder 4 of the fuel proportioning valve.
    公开号:SU1056919A3
    申请号:SU802943148
    申请日:1980-07-04
    公开日:1983-11-23
    发明作者:Баудер Армин
    申请人:Ауди Нсу Ауто Унион Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to mechanical engineering, in particular, to devices for the continuous injection of fuels into an internal combustion engine. Devices for continuous fuel injection into an internal combustion engine with external mixing and forced ignition are known, comprising a plate located in the intake tract for measuring the amount of intake air associated with a metering valve located in the housing, having an inlet duct connected to a pressure line fuel booster pump, equipped with a reduction valve, metering body having two cylindrical sections in contact with the body supports into the full section at least one metering, edge, and outlet, valve of adjustable differential pressure, equipped with a regulating body, connected with a membrane located in the housing element, which forms two working chambers, the first of which is connected to the pressure line, and the second - through the regulator - to the bypass line, and a diaphragm valve placed in the body, made in the form of a spring-loaded diaphragm fixed in the body and forming with it two voids, the first of which is connected to the metering outlet Apaana and the second - to a second operating valve a differential pressure control chamber and the central valve seat element adapted to contact with the diaphragm on the side facing the first cavity, and a fuel-injection nozzle to .klyuchennogo ij. However, in known devices, during engine operation, fuel leakage through the metering body of the metering valve is possible, and after stopping the engine, bubbles of fuel vapors may form, which results in deterioration of the device operation and engine start-up and it has poor performance. . I The purpose of the invention is to improve performance. The goal is achieved in those in a device for continuous injection of top oil to an internal combustion engine with external mixture formation and forced ignition containing a plate located in the intake path for measuring the amount of intake air associated with the metering valve placed in the housing and having an inlet channel connected to the pressure line of the fuel booster pump, equipped with a pressure reducing valve, metering body having two cylindrical sections in contact with the supports body between the support sections. at least one metering edge and the outlet channel, a pressure differential control valve, supplied by a regulator connected to a membrane placed in the body element, forming with the latter two working chambers, the first of which is connected to a pressure head The highway, and the second through the regulating body, to the bypass line, and an agmenny valve placed in the housing of the diaphragm valve, made in the form of a spring-loaded diaphragm fixed in the housing and forming with it two halves the first of which is connected to the outlet of the metering valve, and the second to the second working chamber of the pressure regulation valve, and the central seat element, which is in contact with the diaphragm of the side facing the first cavity and connected to the fuel injection nozzle, the metering valve in at least one cylindrical section is provided with a cylindrical groove and is located in the last sealing ring element, and the overflow line is provided with an additional a valve connected behind the pressure regulation valve relative to the flow and having a shut-off member configured to be loaded with pressure in the bypass line, and output from the reduction valve: connected to the bypass line between the differential pressure regulating valve and the additional valve, and the diaphragm spring is placed into the second the cavity of the diaphragm valve, the sealing ring element is formed by a plastic contact ring and an elastic spacer ring recessed into the groove ohm round section of elastomer material. The contact ring is made of polytetrafluoroethylene, the cylindrical groove is made in the hull support. In addition, the additional valve is provided with a diaphragm forming two chambers connected respectively to the pressure line and the outlet of the differential pressure control valve, and the locking member of the additional valve is equipped with a spring, the force of which is directed towards the closing of the additional valve. Figure 1 shows the proposed device for continuous fuel injection into an internal combustion engine with external mixing and forced ignition, a cut; in FIG. 2 -. Node in figure 1; fig. 3 - the same embodiment.
    The device for continuous fuel injection into the internal combustion engine with external mixture formation and forced ignition contains plate 3 for measuring the amount of intake air located in the inlet duct 1 of pipeline 2, rigidly connected with a protruding end 4 of the metering body 5 of the metering valve placed in housing 6 and having an inlet channel 7 connected to the pressure line 8 of the fuel injection pump 9, metering body 5 having two cylindrical sections 10 and 11, made between the last they metering edge 12, formed by a screw groove 13 and the output channel 14, a pressure differential control valve, equipped with a regulator 15 connected to a membrane 16 fixed between the housing element parts 17 and 18 and forming with them two working chambers 19 and 20, the first of which is connected to the pressure line 8, and the second through the flow channel 21 and the distribution window 22, made in the regulating body 15, to the bypass line 23, and a diaphragm valve in the body 6, made in the form of a spring-loaded diaphragm valve fragments 24 and the central saddle element 25.
    The casing 6 of the metering valve is provided with a cover 26, which is connected to the pipeline 2 with screws 27, and a distribution sleeve 28, in which distribution ports 29 are connected to the outlet channel 14. The distribution sleeve 28 is fixed in the housing 6j and the metering body 5 is made The radial bearings of the metering body 5 are rotatable using a plate 10 formed by cylinders 10 and 11, and its axial bearing is formed by a thrust bearing 30 located between the end of the distribution sleeve 28 and the washer 31, closed lennoy with a bolt 32 to the dispensing body 5 (the surface on the distribution sleeve 28 and the washer 31 in contact with the bearing 30 must perform with high hardness)
    In the housing 6 and the distribution sleeve 28, several output channels 14 and distribution windows 29 are made, and each output channel 14 is in communication with its own diaphragm valve, the spring-loaded diaphragm 24 of which is fixed in the housing 6 by means of the cover 33. The spring-loaded diagonal 24 forms with the cover 33 the first cavity 34 communicated with the channel 7 of the metering valve, and with the housing b - the second cavity 35 communicated with the help of the pipeline 36, the chamber 37 and the channel 38, made in part 18 of the housing element, with the operating chamber 20 of the valve Ani pressure differential. The central seat 25 is adapted to contact with the diaphragm 24 from the side of the first cavity 34, and from the side of the second
    0 the cavity 35, the diaphragm 24 is equipped with a spring 39 acting on the diaphragm 24 through the supporting plate 40 and provided with an adjusting screw plug 41.
    five
    The lid 33 also has a pressure relief valve 8 which is formed by a shut-off member 42 loaded with a spring 43 and pressed against the seat 44. The output 45 of the boost valve is connected to the overflow main 23 between the differential pressure control valve and the auxiliary valve, the stop member 46 of which is placed in strips 47 of the cylindrical protrusion 48 fixed on the lid 33 of the housing 6, and provided with a rod 49 connected with the membrane 50 forming the chamber 51 with the lid 33, connected to the pressure line 8, and the chamber 52 connected to the bypass line. The locking member 46 is designed to be loaded with pressure in the bypass line and provided with a spring 53, the force of which is directed 5 to close the locking member 46 in the cavity 47 of the additional valve 47 through pipe 54 connected to the fuel tank 55,
    Valve Regulator 15
    0 controlling the differential pressure is loaded by a spring 56 located in the chamber 37 and connected to the device 57, which is activated, for example, by the engine load. Membrane 16 with
    5 on the side of the location of the regulator 15 is loaded with a spring 58, and on the side of the working chamber 19 with a spring 59 connected to the device 60 for enrichment during cold start when yomoshchi stockd 61. The working chambers 19 and 20 are interconnected by a channel 62 having a hydraulic choke 63 .
    The dosing unit 5 on the cylindrical sections 10 and 11 is provided with cylindrical grooves 64, in which sealing ring elements 65 are placed.
    The device works as follows.
    0 way.
    When the device is operating, the pressure of the pressure line 8 acts on the membrane 50 so that the locking member 46 opens the flow area for the fuel directed through the bypass line 23 from the pressure differential control valve and from the pressure reducing valve.
    The pressurized fuel from the booster pump 9 via the pressure line 8 enters through the inlet channel 7 of the metering valve and into the first working chamber 19 of the pressure difference control valve 19. The plate 3 is set in a position proportional to the air flow in the intake tract 1 and turns the metering body 5 so that the latter with its metering edge 12 controls the amount for the passage of fuel through the distribution window 29 into the output channel 14, from which the fuel then flows into the first cavity 34 and through the center saddle element 25 to the corresponding nozzle. Fuel leakage through the gap between the cylindrical sections; 10 and 11 of the metering body 5 and the distribution sleeve 28 to the thrust bearing 30 and in the intake path1 are prevented by sealing ring elements 65.
    After the engine stops, the additional valve closure member 46 quickly closes the flow area of the overflow line 23, so that no fuel flows through the pressure reducing valve and the differential pressure control valve. The central seat member is also blocked by a diaphragm 24, so that the fuel pressure cannot decrease, and the fuel vapor bubbles formed in the nozzle do not propagate through the channels of the device. The annular sealing elements 65 maintain in the channels of the device a high pressure for a relatively long period of time, in
    therefore, it is easier to re-start the engine.
    Each annular sealing element (FIG. 2) is formed by a contact ring 66 adjacent to the surface of the distribution sleeve 28 and made of plastic, having a low coefficient of friction sliding, for example polytetrafluoroethylene, and recessed in the groove 64 by an elastic spacer ring 67 of circular section of an elastomeric material. The ring 67 is deformed to an elliptical section so that it prevents fuel from flowing through the groove 64, and the ring 66 prevents the fuel from flowing through the gap between the metering body 5 and the distributor sleeve 28. This design of the ring sealing element provides little resistance to rotation of the metering body 5 after the motor stops .
    In the embodiment depicted in FIG. 3, the distributor sleeve 28 is provided with a cylindrical groove 68 in the zone of the cylindrical sections 10 and 11 of the metering body 5. In the groove 68, the spacer ring 69 is recessed and the contact ring 70 is installed. These rings work similarly to the rings in FIG. 2.
    Thus, such an embodiment of a device for continuously injecting fuel into an internal combustion engine ensures that fuel does not leak through the metering valve; and maintaining high pressure in the channels, the device after stopping the engine, in connection with which it is possible to reliably restart the latter and, consequently, the performance of the device is improved.
    权利要求:
    Claims (5)
    [1]
    1. DEVICE FOR CONTINUOUS INJECTION OF FUEL IN THE INTERNAL COMBUSTION ENGINE with external mixture formation and positive ignition, containing a plate located on the inlet tract for measuring the amount of intake air connected to a metering valve located in the casing, which has an inlet channel connected to the pressure head pump equipped with a pressure reducing valve, a metering body having two cylindrical sections ΐ in contact with the supports of the housing, made between the bearings and sections of at least one dispensing edge and an outlet channel, a differential pressure control valve provided with a regulating body connected to a membrane located in the housing element, which forms two working chambers with the latter, the first of which is connected to the pressure line, and the second through the regulatory body - to the bypass line, and a diaphragm valve located in the housing, made in the form of a spring-loaded diaphragm fixed in the housing and forming two cavities with it, the first of which is connected to the outlet to valve, and the second - to the second working chamber of the differential pressure control valve, and the central seat element, made with the possibility of contacting the diaphragm from the side facing the first cavity., and connected to the fuel injection nozzle, characterized in that, in order to improve performance characteristics, the metering valve in at least one cylindrical section is provided with a cylindrical groove and a sealing ring element located in the last, and a bypass supply and an additional valve included behind the differential pressure control valve relative to the flow and having a shut-off member configured to be pressurized in the bypass line, and the outlet from the pressure reducing valve is connected to the bypass line between the differential pressure control valve and the additional valve, the diaphragm spring being located in the second diaphragm valve cavity.
    [2]
    2. The device according to claim 1, characterized in that the sealing ring element is formed by a slip ring made of plastic and a resilient circular spacer recessed in the groove of circular cross section from elastomeric material.
    [3]
    3. The device pop. 2, characterized in that the contact ring is made of polytetrafluoroethylene.
    [4]
    4. The device according to claim 2, characterized in that the cylindrical groove is made in the support of the housing. ’
    [5]
    5. The device according to claim 1, characterized in that the additional valve is equipped with a membrane forming two chambers, respectively connected to the pressure line and the output of the differential pressure control valve, and the shut-off element of the additional valve is equipped with a spring, the force of which is directed towards the closing side additional valve.
    > and „ p 1056919 A,
    类似技术:
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    US2750933A|1956-06-19|Fuel injection system
    US3896778A|1975-07-29|Apparatus in a combustion engine including a device for continually measuring and individually distributing to a plurality of fuel injection valves the amounts of fuel appropriate to the amounts of combustion air
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    US4745903A|1988-05-24|Pressure regulating valve
    KR870008109A|1987-09-24|Fuel Injection Control Valve
    US3951119A|1976-04-20|Fuel injection system
    同族专利:
    公开号 | 公开日
    US4346687A|1982-08-31|
    JPS5614855A|1981-02-13|
    FR2461107A1|1981-01-30|
    DE2927110A1|1981-01-08|
    GB2054032A|1981-02-11|
    FR2461107B1|1983-07-29|
    SE8004606L|1981-01-06|
    GB2054032B|1983-03-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2604980C2|2011-01-25|2016-12-20|Роберт Бош Гмбх|Relief valve of a fuel injection system|US3831259A|1972-04-13|1974-08-27|Bg & F Inc|A method of providing a solid gall preventer in a pin and box joint|
    US3974809A|1973-03-16|1976-08-17|Robert Bosch G.M.B.H.|Fuel injection system for spark plug-ignited internal combustion engines with compression of the air-fuel mixture|
    DE2348860A1|1973-09-28|1975-04-10|Bosch Gmbh Robert|FUEL INJECTION SYSTEM|
    US4100904A|1973-09-28|1978-07-18|Robert Bosch Gmbh|Fuel injection system|
    DE2502153A1|1975-01-21|1976-07-22|Bosch Gmbh Robert|FUEL INJECTION SYSTEM|
    DE2548549C3|1975-10-30|1978-10-12|Pierburg Gmbh & Co Kg, 4040 Neuss|Device for manifold injection for internal combustion engines|
    DE2637465A1|1976-08-20|1978-02-23|Bosch Gmbh Robert|FUEL INJECTION SYSTEM|
    DE2703722C2|1977-01-29|1986-09-04|Audi AG, 8070 Ingolstadt|Fuel injection system|
    DE2758065A1|1977-12-24|1979-07-05|Audi Nsu Auto Union Ag|FUEL INJECTION SYSTEM|
    DE2810177C2|1978-03-09|1982-10-21|Audi Nsu Auto Union Ag, 7107 Neckarsulm|Fuel metering valve of a fuel injection system|
    DE2829029A1|1978-07-01|1980-01-10|Bosch Gmbh Robert|SEALING ARRANGEMENT FOR PRESSURIZED PARTS|DE3127543A1|1981-07-11|1983-01-20|Robert Bosch Gmbh, 7000 Stuttgart|"FUEL SUPPLY DEVICE FOR INTERNAL COMBUSTION ENGINES"|
    DE3314633A1|1982-12-28|1984-06-28|Robert Bosch Gmbh, 7000 Stuttgart|FUEL INJECTION SYSTEM|
    DE3412746A1|1984-04-05|1985-10-17|Robert Bosch Gmbh, 7000 Stuttgart|FUEL INJECTION SYSTEM|
    DE3442087A1|1984-11-17|1986-05-28|Audi AG, 8070 Ingolstadt|Fuel metering valve of a fuel injection system|
    JPH06129322A|1992-10-15|1994-05-10|Fuji Heavy Ind Ltd|Fuel pressure controlling method for high pressure injection type engine|
    DE102006037174A1|2006-08-09|2008-02-14|Robert Bosch Gmbh|Apparatus and method for controlling a fuel flow rate in a low pressure circuit system for an internal combustion engine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19792927110|DE2927110A1|1979-07-05|1979-07-05|FUEL INJECTION SYSTEM|
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