• 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:
    A fuel injection nozzle unit includes a differential valve member biased by a spring to a closed position and opened to allow fuel flow through an outlet by fuel under pressure from an inlet. The spring is housed within a spring chamber and fuel leaking into this chamber is vented to the inlet when delivery of fuel has ceased. A relief valve is provided which has a valve element having a surface exposed to the pressure in the chamber and an opposing surface exposed to the pressure exterior of the nozzle unit. The valve element is biased to a closed position by a spring and it controls flow along a path from the chamber to the inlet. The flow path also incorporates a non-return valve. The valve element is set to lift from its seating at a pressure which is greater than the residual pressure in the inlet plus the pressure required to open the non-return valve.
    公开号:SU1098526A3
    申请号:SU813238727
    申请日:1981-02-02
    公开日:1984-06-15
    发明作者:Фенне Айвор
    申请人:Лукас Индастриз Лимитед (Фирма)；
    IPC主号:
    专利说明:

    The phrase refers to engine building. A nozzle for supplying fuel to a diesel engine, comprising a housing with a channel and an outlet, a needle mounted in a channel with a gap, having the ability to move and control the toppive stream passing through the outlet, a needle loading spring located in the inner chamber of the housing, a pressure outlet in the housing and the means for discharging the totadive from the chamber through a spring-loaded non-return valve to the discharge port 1 j The disadvantage of this nozzle is the low stability of the supply due to the influence Full-time pressure in the discharge hole. The purpose of the invention is to increase stability. This goal is achieved by the fact that in a nozzle for supplying fuel to a diesel engine, comprising a housing with a channel and an outlet, a needle installed in a channel with a gap, having the ability to move and adjust the flow of fuel passing through the outlet, internal; there is a housing chamber, a discharge orifice in the hub and means for. diverting fuel from the chamber through a spring-loaded non-return valve to the discharge port, the nozzle is provided with an additional safety valve with elastic means for regulating the pressure of fuel in the chamber installed between the non-return valve and the chamber. The safety valve contains a seat and a valve element with a head which, in the closed positions of the valve element, interacts with the seat and has a through channel connected to the chamber, while the valve element and the valves form an annular cavity in the housing connected to the discharge port through a check valve. The check valve is located in the housing. The valve element for connection with the elastic means is provided with a stem, which is installed in the bore of the housing and has sealing means, the outer end of the stem being connected to the atmosphere. The drawing shows a constructive nozzle diagram. 26 The nozzle includes a housing 1 with a channel 2 and an outlet 3 installed in the channel 2 with a clearance of the needle 4, having the ability to move and adjust the fuel flow passing through the outlet 3, a spring 5 for loading the needle 4 located in the inner chamber 6 of the housing 1 , an injection port 7c of the housing 1 and means for diverting fuel from the chamber 6 through a swirled check valve 8 into the injection port 7. The nozzle is provided with an additional safety valve 9 with elastic means 10 for regulating pressure There is fuel in chamber 6 installed between the check valve 8 and the chamber 6. The check valve 8 is located in the housing 1. The safety valve 9 contains a seat 11 and a valve element 12 with a head 13, which in the closed damping of the valve element 12 interacts with the saddle 11 and has a through channel 14 connected to the chamber 6, wherein the valve element 12 and the sedpo 11 form an annular cavity 15 in the collar, v connected to the discharge port 7 through the non-return valve 8. The valve element 12 for connection with the elastic means 10 is provided with a rod 16, which is mounted in the bore 17 of the housing 1 and has a seal which is provided above the means 18, the outer end 19 of the stem 16 being associated with the atmosphere. The nozzle works as follows. When the fuel is supplied to the injector due to the increasing pressure, the needle "4 and-fuel injection into the engine through the outlet 3 is lifted." The spring 5 is compressed. Part of the fuel through the gap in the channel 2 between the needle and the housing 1 enters the chamber 6, where, using a safety valve 9, a predetermined pressure value is set, which serves for additional loading of the needle 4. The pressure value is determined by tightening the elastic means 10 and does not depend on changes in the residual pressure in the heating hole 7, which increases the stability of the nozzle. Thus, the proposed nozzle design provides increased stability.
    权利要求:
    Claims (4)
    [1]
    1. NOZZLE for supplying fuel to a diesel engine, comprising a housing with a channel and an outlet, a needle installed in the channel with a gap, with the ability to move and regulate the fuel flow passing through the 'exit hole' i a spring for loading the needle located in the inner chamber of the housing, an injection hole in the housing and means for removing fuel from the chamber through a spring-loaded check valve into the discharge opening, characterized in that, in order to increase stability, the nozzle is equipped with an additional -enforcement valve with resilient means for adjusting the fuel pressure in the chamber mounted between the nonreturn valve and the chamber.
    [2]
    2. The nozzle according to claim 1, characterized in that the safety valve comprises a seat and a valve element with a head, which in the closed position of the valve element interacts with the seat and has a through channel connected to the chamber, while the valve element and the seat form an annular cavity in the housing associated with the discharge port through a check valve.
    [3]
    3. The nozzle according to claim 2, characterized in that the check valve is located in the housing.
    [4]
    4. Nozzle pop. 1, characterized in that the valve element for connecting with an elastic means is equipped with a stock, which is installed in the bore of the housing and has sealing means, and the outer end of the rod is connected with the atmosphere.
    类似技术:
    公开号 | 公开日 | 专利标题
    US6131607A|2000-10-17|Delivery valve
    JP2542051B2|1996-10-09|Electromagnetically controlled fuel injection valve for diesel engine
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    US5950600A|1999-09-14|Device for controlling an internal combustion engine fuel injector
    US3443760A|1969-05-13|Fail-safe fuel injection nozzle
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    EP0287366B1|1993-08-11|Carburetor and valve mechanism
    US2762654A|1956-09-11|Fuel injection device
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    US20030094203A1|2003-05-22|Fuel metering device for a turbomachine injector
    JPH10141185A|1998-05-26|Fuel injection valve for internal combustion engine
    CZ46496A3|1997-03-12|Shut-off valve of a nozzle and a pressure spray nozzle with a nozzle pressure closing valve
    同族专利:
    公开号 | 公开日
    ES498674A0|1982-04-01|
    JPS56110557A|1981-09-01|
    US4346841A|1982-08-31|
    FR2475143A1|1981-08-07|
    IT1135202B|1986-08-20|
    ES8204065A1|1982-04-01|
    DE3103324A1|1981-12-24|
    IT8119367D0|1981-01-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    GB544384A|1941-01-30|1942-04-10|George Stephen Kammer|Improvements relating to the disposal of seepage liquid from apparatus subjected intermittently to high liquid pressure|
    GB1406216A|1971-10-30|1975-09-17|Cav Ltd|Fuel injection nozzle units|
    US3948446A|1975-01-29|1976-04-06|Deere & Company|Fuel injection nozzle|
    FR2371583A1|1976-11-18|1978-06-16|Lucas Industries Ltd|Fuel injector for compression ignition engine - has plunger raised by fuel pressure on shoulder with non-return valve|
    US4186884A|1978-01-11|1980-02-05|Lucas Industries Limited|Liquid fuel injection nozzles|
    FR2416355A1|1978-02-07|1979-08-31|Vysoke Uceni Tech Brne|Fuel injection for diesel engine - has needle valve in nozzle and non return valve between spring chamber and compression channel|
    US4261513A|1978-09-26|1981-04-14|Lucas Industries Limited|Fuel injection nozzles|US4494697A|1983-01-11|1985-01-22|Geberth John Daniel Jun|Spray control valve|
    JPS60104764A|1983-11-09|1985-06-10|Yanmar Diesel Engine Co Ltd|Fuel injection valve|
    KR20000004196A|1998-06-30|2000-01-25|윤종용|Spraying nozzle having pressure control device|
    US6276125B1|1998-12-17|2001-08-21|Alliedsignal, Inc.|Pressure balanced poppet valve|
    DE10306927A1|2003-02-19|2004-09-09|Hammelmann Maschinenfabrik Gmbh|Pressure relief valve|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    GB8003564|1980-02-02|
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