• 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:
    In a method of testing a gas injection valve for an internal combustion engine, the valve is placed in a holder with a first chamber 2 and a second chamber 3, the valve jet tip 11 being placed in the first chamber 2, after which the valve is closed in closed state by a test gas under pressure. checking whether the valve seat and valve gaskets in 13a, 13b are sealed. By this method it is also possible to indicate where there is a leak.
    公开号:DK201100877A
    申请号:DKP201100877
    申请日:2011-11-09
    公开日:2013-05-10
    发明作者:Kortsen Bent
    申请人:Iop Marine As；
    IPC主号:
    专利说明:

    A method for testing a gas injection valve and a plant for carrying out the method.
    The invention relates to a method for testing a gas injection valve for an internal combustion engine.
    From WO 9824014 an equipment for testing fuel injection valves is known by means of compressed air. However, such test equipment is not sufficient for testing gas injection valves for internal combustion engines where even small leaks are unacceptable and involve a risk of explosion.
    Furthermore, a device for testing gas injection valves for internal combustion engines is known. However, this equipment does not appear to be entirely satisfactory.
    The object of the invention is therefore to provide a test method which is also suitable for testing gas injection valves and which is capable of detecting even the smallest leaks. In addition, the method must be particularly simple.
    A method of the kind mentioned initially according to the invention is characterized in that the valve is placed in a holder with a first and a second chamber, the valve jet tip is placed in the first chamber and the valve in the closed state is actuated by a non-combustible gas to control, whether the valve seat and valve gaskets are tight. A leakage of gas from the first chamber will then indicate that there is a leakage at the valve seat and the valve jet tip, while a leakage of gas from the second chamber indicates that there is a leakage at least one of the valve gaskets.
    Still, according to the invention, the test gas can be supplied to the first chamber under a pressure of approx. 300 bar, a sealing oil being applied to the other part of the valve at a pressure higher than the gas pressure.
    Furthermore, according to the invention, the test gas may, for example, be nitrogen.
    In a particularly convenient embodiment, the pressure of the test gas can be brought up to approx. 300 bar using a compressor which simultaneously brings the pressure of the control oil to a higher value. This allows you to do with a compressor.
    According to the invention, the gas escaping at the valve seat and the valve jet tip during the gas supply can be detected via a gas discharge tube which is fed to a separate liquid container from the first chamber. This will detect any eventuality. discharges as bubbles and thereby achieve a particularly simple method for detecting leaks at the valve seat and the valve jet tip.
    According to the invention, the gas which escapes during the gas supply due to leaky valve gaskets can be detected separately via a gas discharge pipe connected to the valve, which is led to another separate liquid container. Thus, a particularly simple method for detecting leaks in the valve gaskets is obtained.
    The invention also relates to a plant for practicing the method of testing a gas injection valve for an internal combustion engine. According to the invention, the system comprises a holder in which the valve can be placed, which holder has a first and a second chamber, the system further comprising a unit for supplying sealing oil to the gas injection valve, a unit for supplying control oil to the valve, a unit for supplying test gas. for the holder and units for testing the valve for leaks when observing any. release of gas from the holder. This results in a particularly simple system for testing a gas injection valve.
    The invention will be explained in more detail below with reference to the drawing, in which FIG. 1 shows the entire system according to the invention for testing a gas injection valve FIG. 2 is a longitudinal and perpendicular sectional view of the valve holder included in the system for the gas injection valve and FIGS. 3a and 3b.
    Gas injection valves for internal combustion engines must be checked fairly frequently and at regular intervals to leaks can cause explosion of explosive gases.
    FIG. 1 shows a device according to the invention for testing a gas injection valve. The plant includes a valve holder to which test gas, sealing oil and control oil can be supplied. The valve holder with the gas injection valve 1 disposed therein is shown Ϊ perspective in fig. 2 and in section in FIG. 3a and 3b.
    The FIG. 3a and 3b, the valve holder 1 shown with the valve disposed therein has a first lower chamber 2 and a second upper chamber 3. Furthermore, the valve itself is seen which comprises a body piece with a longitudinal opening. To the lower part of the body piece, a valve jet tip 11 is mounted by means of an inward flange 8 with an inward flange 11. The valve jet tip has an elongated opening which communicates with the through-opening in the body piece, in which there is a spindle guide 12 which can be lifted up by means of castor oil supplied through an opening 4a. The control oil then has a pressure of approx. 300 bar. From the opening 4a, the guide oil is passed down through a vertical channel 5 and into a cavity which is upwardly defined by a piston-like body 6. This body 6 can be pressed up against an overhead spring 7 by supplying the said control oil, whereby the associated spindle guide 12 is lifted and the gas injection valve opens. The supply of the control oil is controlled by means of a sliding valve 25 included in the system, cf. In addition, an opening 9 is seen in the side of the holder for supplying test gas from a gas container, typically containing N2. However, other test gases may also come up for discussion. The test gas is passed via a circumferential cavity 10 around the body piece and some inclined downward channels to the lower portion 14 of the spindle guide 12. On each side of the circumferential cavity 10 in the upward and downward directions, respectively, there is a circumferential sealing ring 13a, 13b, which serves to ensure that no accidental release of compressed gas ffa occurs around the annular cavity 10. These sealing rings 13a, 13b may, for example, consist of teflon.
    A possible. leakage due to leaking sealing rings then causes test gas to be discharged through the openings 16,17 through the opening 19. Furthermore, an ev. discharge of test gas at the valve seat and the valve jet tip 11 to release gas at the opening 20.
    The parts forming the upper chamber 3 and the lower chamber 2, respectively, and the head piece 27 containing the compression spring 7 are fixed to flanges 38,39 held together by bolts 40.
    The valve's placement in the holder 1 also corresponds to the valve's placement in a motor, typically a two-stroke motor. However, when the valve is placed in a motor, the lower part of the valve jet tip 11 is freely projecting.
    FIG. Figure 1 shows the entire system for testing a gas injection valve. It comprises, in addition to the valve holder 1 with the two chambers 2.3, a conduit 21 for supplying sealing oil from a tank 26 at a pressure greater than the pressure of the test gas, for example 340 bar. The sealing oil is fed above to an opening 21 a and serves to ensure that gas does not flow into the valve due to the high gas pressure. Furthermore, there is a conduit 4 for supplying control oil from the tank 26 at a pressure of, for example, a maximum of 300 bar to an opening 4a in the head piece 27. The supply of control oil is controlled by means of the electrically controlled sliding valve 25. Return of the sealing oil and guide oil, respectively, from the opening 24a takes place via a conduit 24 to the tank 26, from which the oil is returned to the holder 1. By means of compressed air pumps 36,37, various pressure gauges are also seen.
    In a particularly convenient embodiment, the pressure of the test gas is brought up to approx. 300 bar using a compressor 31.34 inserted in the gas line. The same compressor can be used to simultaneously bring the pressure of the control oil to substantially the same value.
    Any gas leakage from the orifice 20 is detected via a connected hose which is introduced into a liquid container 28. A possible gas leakage is then detected by gas leaks in the container 28. This is a particularly sensitive detection method which is simultaneously incredibly simple.
    A possible. gas leakage from the side opening 19, which may result from leaking seals 13a and 13b, is detected via a hose 19a connected to the opening 19 which is fed into a liquid container 29. gas leakage is then detected by observing some gas bubbles in the container 29. This, too, is a very sensitive detection method, which is at the same time extremely simple.
    A particular advantage of the plant according to the invention is that it is able to indicate where there is a leak.
    If the control oil does not open at the correct pressure, small drops of sealing oil can flow out under high pressure (300 bar) together with nitrogen. If the oil drops come into contact with oxygen, the high pressure can cause local combustion to occur. This is avoided by first emptying / cleaning the valve nozzle for oxygen by supplying nitrogen at low pressure before conducting the test of the gas injector valve opening.
    权利要求:
    Claims (7)
    [1]
    A method of testing a gas injection valve for an internal combustion engine, wherein the valve is disposed in a holder (I) with a first chamber (2) and a second chamber (3), the valve jet tip (II) being placed in the first chamber ( 2) and the valve in the closed state is actuated by a non-combustible test gas under pressure to check whether the valve seat and valve gaskets (13a, 13b) are tight.
    [2]
    Process according to claim 1, characterized in that the test gas is supplied to the second chamber (3) under a pressure of approx. 300 bar, a sealing oil being applied to the other part of the valve at a pressure higher than the gas pressure.
    [3]
    Process according to claim 1 or 2, characterized in that the test gas is nitrogen.
    [4]
    Method according to claim 2, characterized in that the pressure of the test gas is brought up to approx. 300 bar by means of a compressor (31,34) which simultaneously brings up the pressure of the control oil at substantially the same value.
    [5]
    Method according to one of the preceding claims, characterized in that the gas escaping at the valve seat during the gas supply is separately detected, possibly, via a gas discharge pipe (20a) which is fed from a first chamber (2) to a separate liquid container (28). ).
    [6]
    Method according to one of the preceding claims, characterized in that the gas which escapes during the gas supply as a result of leaking valve gaskets (13a, 13b) is separately detected, possibly via a gas discharge pipe (19a) connected to the valve, separate liquid container (29).
    [7]
    An apparatus for testing a gas injection valve for an internal combustion engine comprising a holder (1) in which the valve can be mounted, said holder having a first chamber (2) and a second chamber (3), the system further comprising a unit (32) for supply of sealing oil to the valve, a unit (31) for supplying control oil to the valve, a unit for supplying test gas to the holder and units for testing the valve for leaks when observing any. release of gas from the holder.
    类似技术:
    公开号 | 公开日 | 专利标题
    DK177454B1|2013-06-17|A method for testing a gas injection valve and a plant for carrying out the method
    JP6034886B2|2016-11-30|Method for testing a gas shut-off valve and system for carrying out this method
    JP2014532884A5|2015-08-20|
    KR20080099387A|2008-11-13|Apparatus and method for testing leak of fuel tank
    KR101613540B1|2016-04-19|Leak tester for high pressure component
    CN207066700U|2018-03-02|Mass spectrum leak detection equipment with connector
    CN102297751A|2011-12-28|Air tightness detection device for high-pressure opened liquefied petroleum gas cylinder valve
    CN103207053B|2015-09-30|Windshield Washer leakage inspector
    CN208223759U|2018-12-11|A kind of air tightness test-bed of oil storage cylinder
    CN110486629A|2019-11-22|Air-tightness detection device and method for double fuel host gas pipeline
    CN105971728A|2016-09-28|Leak check device
    KR101187563B1|2012-10-04|Fuel leak test device for wing fuel tank
    EP2199655B1|2011-08-31|A leakage control mechanism for LPG cylinders
    CN104122049B|2016-08-31|A kind of high pressure airtightness testing method
    CN211059791U|2020-07-21|Leak protection detection device for gas holder
    CN210322228U|2020-04-14|Tensioner steel ball gas leakage testboard
    CN210154759U|2020-03-17|Engine leakage test system
    CN210625965U|2020-05-26|Device for detecting rivet air tightness of battery shell
    CN209979174U|2020-01-21|Multi-station sealing cover tightness measuring device
    CN207066688U|2018-03-02|Mass spectrum leak detection equipment with elevating mechanism
    CN204405580U|2015-06-17|Coal gas explosion test device
    RU121341U1|2012-10-20|SYSTEM FOR PREPARING FOR OPERATION OF HIGH PRESSURE AIR BLOCK
    CN111157185A|2020-05-15|Air tightness detection device and air tightness detection method for emergency cut-off valve
    CN204202826U|2015-03-11|Sensor pressure inlet tapering connects air-tightness detection device
    同族专利:
    公开号 | 公开日
    KR20140079440A|2014-06-26|
    CN103906917A|2014-07-02|
    EP2776703B1|2016-10-12|
    US20140318221A1|2014-10-30|
    JP2014532884A|2014-12-08|
    KR101639493B1|2016-07-13|
    CN103906917B|2017-02-15|
    WO2013068090A1|2013-05-16|
    US8925372B2|2015-01-06|
    EP2776703A1|2014-09-17|
    JP6133315B2|2017-05-24|
    DK177454B1|2013-06-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3106835A|1959-02-10|1963-10-15|Gomco Surgical Mfg Corp|Check valve tester|
    US3245256A|1962-10-30|1966-04-12|Varian Associates|Low flow rate meter|
    US3511082A|1968-05-07|1970-05-12|M & J Valve Co|Leak detecting apparatus for valves|
    US4157656A|1977-12-02|1979-06-12|Walle L Irwin|Leak detection system|
    GB8303407D0|1983-02-08|1983-03-16|Tectron Eng Ltd|Fuel injectors|
    US4770029A|1986-08-21|1988-09-13|Atwood & Morrill Co., Inc.|Valve testing method and device|
    DE4026228C1|1990-08-18|1991-08-22|Robert Bosch Gmbh, 7000 Stuttgart, De|
    JPH04370365A|1991-06-18|1992-12-22|Mazda Motor Corp|Method and device for inspecting fuel injection valve|
    JPH0785042B2|1991-09-11|1995-09-13|株式会社フクダ|Leak tester for injector|
    JPH07119585A|1993-10-28|1995-05-09|Toyota Motor Corp|Fuel injection valve inspecting device|
    JPH109991A|1996-06-19|1998-01-16|Unisia Jecs Corp|Method and apparatus for loquidtightness inspection|
    DE19648689A1|1996-11-25|1998-05-28|Bosch Gmbh Robert|Method and device for testing and / or adjusting valves|
    DE19652832B4|1996-12-18|2005-12-15|Denso Corp., Kariya|Leckagemeßvorrichtung|
    JPH1122598A|1997-07-02|1999-01-26|Mitsubishi Electric Corp|Back pressure resistance measuring device for cylinder fuel injection valve|
    GB9930120D0|1999-12-21|2000-02-09|Assembly Technology & Test Lim|Monitoring equipment for monitoring the performance of an engine fuel injector valve|
    GB0009165D0|2000-04-14|2000-05-31|Assembly Technology & Test Lim|Monitoring equipment|
    DE10309440A1|2003-03-05|2004-09-16|Robert Bosch Gmbh|Method, device and computer program for measuring the leakage of injection systems, in particular for internal combustion engines of motor vehicles|
    GB0325184D0|2003-10-28|2003-12-03|Dt Assembly & Test Europ Ltd|An automotive fuel injector leakage tester|
    JP4120576B2|2003-12-15|2008-07-16|株式会社デンソー|Liquid volume measuring device|
    DE102004055575A1|2004-11-18|2006-05-24|Robert Bosch Gmbh|Method and device for leakage testing of a fuel injection valve of an internal combustion engine|
    DE102005055746A1|2005-11-23|2007-05-24|Robert Bosch Gmbh|Fluid-feeding part e.g. fuel injection valve, hydraulic leakage rate determining method for e.g. mixture-compaction externally ignited internal combustion engine, involves measuring rate by test fluid concentration and heating vapor mixture|
    JP4371157B2|2007-07-11|2009-11-25|株式会社デンソー|Liquid volume measuring device and liquid volume measuring method|
    US8020585B2|2008-08-22|2011-09-20|Airgas, Inc.|Apparatus and method for detecting a leak within a duplex valve assembly|
    US8332130B2|2008-09-30|2012-12-11|Dale Arden Stretch|Leak detection system|
    EP2455604B1|2010-11-22|2015-07-22|Continental Automotive GmbH|Measuring apparatus and methodfor determining a leakage of an injection valve|CN103837309B|2014-03-26|2016-10-12|零八一电子集团四川天源机械有限公司|Valve sealing performance automatic checking device|
    DK178894B1|2015-03-27|2017-05-08|Iop Marine As|PROCEDURE FOR CHECKING A FLUID GAS INJECTION VALVE|
    CN106089533B|2016-08-15|2018-08-10|潍柴西港新能源动力有限公司|A kind of cleaning of fuel gas injection valve and gas leakage detection device and detection method|
    KR101712875B1|2016-08-18|2017-03-07| 대진유압기계|Apparatus for testing airtightness of gas injection valve for gas engine|
    KR101878815B1|2016-11-18|2018-08-17|전영근|Inspection method for gas injection valve|
    KR101722966B1|2016-11-18|2017-04-05|한미유압기계|Gas injection valve inspection device|
    KR101977283B1|2018-01-08|2019-05-10|주식회사 유연이앤이|Testing apparatus of fuel injection valve and testing method thereof|
    DK180473B1|2019-09-06|2021-05-07|Iop Marine As|Method for testing a valve body of an injector valve and method for testing an injector valve|
    DK180460B1|2019-09-13|2021-05-06|Iop Marine As|Method for testing an inlet-outlet valve|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201100877A|DK177454B1|2011-11-09|2011-11-09|A method for testing a gas injection valve and a plant for carrying out the method|
    DK201100877|2011-11-09|DKPA201100877A| DK177454B1|2011-11-09|2011-11-09|A method for testing a gas injection valve and a plant for carrying out the method|
    KR1020147011453A| KR101639493B1|2011-11-09|2012-11-05|Method of testing a gas injector valve and a system for exercising the method|
    JP2014540347A| JP6133315B2|2011-11-09|2012-11-05|Method for testing a gas injection valve and system for carrying out this method|
    EP12791692.2A| EP2776703B1|2011-11-09|2012-11-05|METHOD OF TESTING A GAS INJECTOR VALVE AND A SYSTEM FOR performing THE METHOD|
    CN201280053086.3A| CN103906917B|2011-11-09|2012-11-05|Method of testing gas injector valve and system for exercising the method|
    PCT/EP2012/004592| WO2013068090A1|2011-11-09|2012-11-05|Method of testing a gas injector valve and a system for exercising the method|
    US14/355,173| US8925372B2|2011-11-09|2012-11-05|Method of testing a gas injector valve and a system for exercising the method|
    [返回顶部]