• 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:
    Injection device for a compression-ignited combustion engine comprising a modifying device between the injector and the fuel supply pump. The modifying device operates by taking off and restoring fuel so as to modify the injection law of the injection device. The injection device comprises an injection pump having a delivery chamber in which are movable pumping and/or distributing means which comprise first means for ensuring the non-simultaneous openings of communications between the delivery chamber and the injector and the delivery chamber and the modifying device. The modifying device comprises means for retarding the restoration of the fuel taken off to the delivery chamber so long as the first means leave the modifying device in communication with the delivery chamber.
    公开号:SU743592A3
    申请号:SU711634230
    申请日:1971-03-29
    公开日:1980-06-25
    发明作者:Ренье Марсель；Ле Крере Морис
    申请人:Отомобиль Пежо (Фирма)；
    IPC主号:
    专利说明:

    (54) DIESEL FUEL PUMP The invention relates to internal combustion engines. A fuel pump is known, for example, for a diesel engine, comprising a housing in which a mechanically driven plunger is placed, a cavity above which is hydraulically connected to the injection line for supplying fuel and communicating with the supply and diverting channels, made in the form of a spring-loaded piston. In such pumps, the cam profile that triggers them is chosen based on the implementation of the optimal flow law, the most characteristic (preferential) engine operating modes, and the device, which changes the value of the feed, corrects the redistribution of fuel that is injected one cycle, in time while reducing the amount of cyclic feed. Thus, the diesel and fuel injection modes of operation are coordinated. However, under the operating conditions of a number of diesel engines, it is often necessary to satisfy such high-speed modes under which the cycle feed at partial loads of the cycle must remain stable and the injection law be kept optimal, since these modes they are very long in time and constitute a significant percentage of the total engine operating time (for example, in transport propulsion systems). The aim of the invention is to improve fuel delivery performance, mainly at partial loads and idling of the engine. This is achieved by changing the injection law without changing the amount of fuel supplied per cycle and is achieved by introducing a series of corrective elements into the device to change the supply of the fuel pump, optimizing the introduction of fuel into the combustion chamber over time in one cycle. The device for changing the feed law comprises an accumulating chamber, an axial channel formed in the piston with a throttle and a radial channel with inlet and outlet channel 1 1i, in which check valves are installed. The device for measuring the feed law can be made in a separate case in which the valve blocks of the QQB and piston are fastened together with a hollow threaded plug that forms a storage chamber with the piston unit, and the housing itself is connected to the fuel pump using a threaded connection.
    To limit the maximum displacement, the piston of the feed change device is provided with a rigid stop located in the accumulating cavity.
    FIG. 1 shows schematically a fuel pump with an accumulating chamber of a device for changing the fuel supply law; a cross-section in FIG. Figure 2 shows a graph of the change in pressure P of the fuel in the storage chamber as a function of the angle of rotation of the mechanical drive; in fig. 3, the change in the fuel supply law as a function of the angle of rotation of the various modes (in the graphs, the dotted lines show the nominal load and the junction line is partial).
    The diesel fuel pump has a housing 1 in which plungers 2 and a valve 3 with a mechanical drive 4 are placed, the cavity 5 above which is hydraulically connected to the discharge line b channel 7 and connected to the inlet 8 and outlet 9 channels with a device 10 for changing the feed law made in the form of spring-loaded porins 11 with a fixed stop 12. The device 10 for changing the feed law comprises an accumulating chamber 13 communicated with an axial channel 14 in the piston 11 with a throttle 15 and a radial 16 channel with an inlet 8 and outlet 9 channels, in which check valves 17 and 18 are installed. A device for changing the supply law is made in a separate housing 19, in which valve blocks 20 and 21 and a piston are mounted, fastened with a hollow threaded plug 22, which forms a storage chamber 13 with a block then , moreover, the housing 19 of the device 10 is connected to the pump housing 1 by means of a threaded joint 23,
    The fuel pump works as follows. The plungers 2, due to the mechanical actuator 4, are compressed in the cavity 5, the fuel entered into the channel 7, and it is fed into the discharge line b to the nozzle (not shown) when the distributor 3 is rotated at a corresponding angle in the housing 1. At the same time, through the channel 8 Injected fuel enters the device 10 to change the feed law, the passage through the check valve 17 placed in block 20 through the throttle 15 of the spring-loaded piston 11 and its internal axial channel 14 into the accumulating chamber 13. The latter is limited to the end the piston 21 and the inner surface of the thread of your plug 22 ,. screwed into the case. 19 devices 10.
    The piston 11 moves gradually until it stops 12. The throttle prevents the piston 11 from abruptly moving.
    Q 15, as well as the fact that it (the piston) is made spring-loaded. When the piston 11 moves in the direction of the stop 12, the radial channel 16 separates with that part of the exhaust channel 9, which is located in the piston block 21.
    Thus, in the fuel injection phase, a certain part of it enters the accumulating KSiMepy 13, and, accordingly, transforms the fuel supply curve due to the corresponding
    0 changes in pressure in the cavity of chamber 13 (Fig. 2 and 3).
    The reverse movement of the piston 11 occurs due to its spring, when the process of fuel injection is almost complete. At the same time, the radial channel 16 communicates with the exhaust channel 9, and the fuel from the chamber 13, pressing the check valve 18 located in block 20, again enters the channel 7 of the distributor 3 when the latter is turned to the corresponding angle in the next cycle.
    Consequently, when switching to partial loads due to the presence of the accumulating chamber, a directional beneficial effect on the law of fuel supply to the injectors is carried out without changing its quantity (Fig. 2 and 3), which increases the efficiency of the combustion process and the efficiency of the engine as a whole.
    权利要求:
    Claims (4)
    [1]
    1. Diesel fuel pump, comprising a housing in which a plunger with a mechanical drive 4 is placed, the cavity above which is hydraulically
    connected to the deadline and connected to the feed and discharge channels with a device for changing the feeding law, made in the form of a spring-loaded piston, characterized in that, in order to improve the flow characteristics by ensuring the change of the driving law without changing the amount of fuel injected, the device for changing 0 The feeding law contains an accumulating chamber, connected by an axial channel made in a pore with a throttle and a radial channel with inlet and outlet channels, in which 5 check valves.
    [2]
    2. The pump according to Claim 1, which differs from the fact that the device for changing the law of delivery is made in a separate housing, in which the valve blocks and the piston are mounted, fastened with a hollow threaded plug, forming a storage chamber with the piston unit.
    [3]
    3. Pump according to Claim 2, characterized in that the housing of the device for changing the connection law
    It is not connected to the pump casing with the aid of a rebar switch.
    [4]
    4. A pump according to claims 1 and 2, which is based on the fact that the piston is provided with a rigid stop located in the accumulating cavity to limit the maximum displacement.
    Sources of information taken into account in the examination
    1, Patent of Poland No. 42535, cl. 46 pp. 2, 105, 1958.
    l 3
    3
    类似技术:
    公开号 | 公开日 | 专利标题
    SU743592A3|1980-06-25|Fuel pump for diesel
    US4628881A|1986-12-16|Pressure-controlled fuel injection for internal combustion engines
    USRE33270E|1990-07-24|Pressure-controlled fuel injection for internal combustion engines
    US5213084A|1993-05-25|Fuel injection system for internal combustion engines
    SU578018A3|1977-10-25|Distributing fuel pump
    US2863438A|1958-12-09|Timing of fuel injection pumps
    US4224903A|1980-09-30|Fuel systems for internal combustion engines
    US3592568A|1971-07-13|Liquid fuel injection pumping apparatus
    US6889662B2|2005-05-10|Fuel pump, in particular for an internal combustion engine with direct injection
    US4621605A|1986-11-11|Positive displacement fuel injection system
    EP0107894B1|1990-01-31|Method and apparatus for precisely controlled fuel injection in a diesel engine
    GB1483906A|1977-08-24|Fuel injection pumps for internal combustion engines
    GB1046951A|1966-10-26|Liquid fuel injection pumps for use with internal combustion engines
    GB1122886A|1968-08-07|Improvements in fuel injection pumps for internal combustion engines
    KR20010021800A|2001-03-15|Fuel supply system in an internal combustion engine
    ES338857A1|1968-04-16|Liquid fuel pumping apparatus for supplying fuel to internal combustion engines
    US3123061A|1964-03-03|figure
    US2521119A|1950-09-05|Fuel distributor
    US3014466A|1961-12-26|New device for carrying out the double injection method in internal combustion engines
    US4463726A|1984-08-07|Distributor pump for injecting fuel into internal combustion engines
    US3494289A|1970-02-10|Rotary distributor pump
    US3099217A|1963-07-30|Fuel injection pumps having distributing pistons
    GB1042262A|1966-09-14|Improvements in fuel injection apparatus for internal combustion engines
    EP0647781B1|1998-05-20|Valve arrangement
    US4951626A|1990-08-28|Electrically controlled fuel injection pump
    同族专利:
    公开号 | 公开日
    FR2093250A5|1972-01-28|
    AT308472B|1973-07-10|
    JPS527096B1|1977-02-28|
    GB1344841A|1974-01-23|
    US3759239A|1973-09-18|
    DE2115169A1|1971-12-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2173813A|1936-10-20|1939-09-19|Bischof Bernhard|Fuel injection apparatus|
    US2250877A|1939-05-19|1941-07-29|Kloeckner Humboldt Deutz Ag|Fuel injector for internal combustion engines|
    US2914042A|1948-10-13|1959-11-24|Rieseler Helene|Internal combustion engine|
    GB810456A|1954-10-06|1959-03-18|British Internal Combust Eng|Improvements in or relating to liquid fuel injection systems for internal combustion engines|
    AT276866B|1965-12-31|1969-12-10|Bosch Gmbh Robert|Fuel injection valve for pilot and main injection|
    US3456629A|1966-08-01|1969-07-22|Peugeot|Fuel injection devices for compression ignited internal combustion engines|
    GB1190919A|1966-11-11|1970-05-06|Cav Ltd|Liquid Fuel Supply Systems for Internal Combustion Engines|
    DE1931039A1|1969-06-19|1971-01-07|Bosch Gmbh Robert|Fuel injection pump for internal combustion engines|
    US3627208A|1969-10-06|1971-12-14|Ricardo & Co Engineers|Fuel injection apparatus for internal combustion engines of the liquid-fuelinjection compression-ignition type|DE2503346C2|1975-01-28|1986-04-03|Robert Bosch Gmbh, 7000 Stuttgart|Fuel distributor injection pump for internal combustion engines|
    US4033301A|1975-07-10|1977-07-05|Eaton Corporation|Fluid distributor logic|
    GB1577918A|1976-04-20|1980-10-29|Lucas Industries Ltd|Liquid fuel pumping apparatus|
    GB1571284A|1976-04-20|1980-07-09|Lucas Industries Ltd|Fuel injection pumping apparatus|
    DE2833431C2|1978-07-29|1987-05-14|Robert Bosch Gmbh, 7000 Stuttgart, De|
    DE3011831C2|1980-03-27|1990-11-15|Robert Bosch Gmbh, 7000 Stuttgart, De|
    GB2116263B|1982-02-20|1985-10-09|Lucas Ind Plc|Fuel injection pumping apparatus|
    DE3307828A1|1983-03-05|1984-09-06|Robert Bosch Gmbh, 7000 Stuttgart|FUEL INJECTION DEVICE FOR INTERNAL COMBUSTION ENGINES|
    DE3310049A1|1983-03-19|1984-09-20|Robert Bosch Gmbh, 7000 Stuttgart|FUEL INJECTION DEVICE FOR INJECTING A FUEL MIXTURE MADE OF AT LEAST TWO COMPONENTS|
    JPS59203863A|1983-05-04|1984-11-19|Nissan Motor Co Ltd|Fuel injection pump for fuel injection type internal- combustion engine|
    DE3318236C2|1983-05-19|1992-04-09|Robert Bosch Gmbh, 7000 Stuttgart, De|
    DE3444234A1|1984-01-11|1985-07-18|Robert Bosch Gmbh, 7000 Stuttgart|FUEL INJECTION PUMP|
    US4667641A|1985-09-23|1987-05-26|Stanadyne, Inc.|Injection pump with radially mounted spill control valve|
    US4552117A|1984-10-09|1985-11-12|Stanadyne, Inc.|Fuel injection pump with spill control mechanism|
    US4644924A|1984-10-09|1987-02-24|Stanadyne, Inc.|Fuel injection pump with spill control mechanism|
    DE3541049C2|1984-11-23|1990-08-16|Avl Gesellschaft Fuer Verbrennungskraftmaschinen Und Messtechnik M.B.H. Prof. Dr. Dr.H.C. Hans List, Graz, At|
    JPH0565696B2|1985-06-28|1993-09-20|Nippon Soken|
    DE3624092C2|1986-07-17|1998-01-29|Guenter Stein|Fuel injection pump for internal combustion engines|
    GB8709038D0|1987-04-15|1987-05-20|Perkins Engines Group|Fuel injection|
    DE3820707A1|1988-06-18|1989-12-21|Bosch Gmbh Robert|INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES|
    EP0643220B1|1993-09-14|1998-04-22|Lucas Industries Public Limited Company|Fuel System|
    GB9322850D0|1993-11-05|1993-12-22|Lucas Ind Plc|Control valve|
    US6109536A|1998-05-14|2000-08-29|Caterpillar Inc.|Fuel injection system with cyclic intermittent spray from nozzle|
    EP1826397A3|2002-05-03|2009-08-05|Delphi Technologies, Inc.|Fuel injection system|
    DE102006020692A1|2006-05-04|2007-11-08|Robert Bosch Gmbh|Pressure control valve with emergency drive and ventilation function|
    KR100992227B1|2008-10-27|2010-11-05|현대중공업 주식회사|Prevention device of cavitation erosion damage in the fuel injection pump of the diesel engine|
    US11035331B2|2018-01-31|2021-06-15|Jonathan Tom Tavernier|Internal combustion engine with tubular fuel injection|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7020929A|FR2093250A5|1970-06-08|1970-06-08|
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