• 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 exhaust valve has a valve member (2) which opens away from the combustion chamber (4) of the engine cylinder and which is biased for opening by the gas pressure prevailing in the combustion chamber. The valve is kept closed by an opposed hydraulic pressure which in a holding chamber (12) acts on a holding piston (11) secured to the spindle (10) of the valve member. When the valve is to be opened, the pressure in the holding chamber is relieved and one or more valve controlled flow passages (35, 36) are opened, through which hydraulic liquid flows from the holding chamber to a reservoir (14) defined by a piston (13) secured to the valve spindle (10). The two pistons (11 and 13) are preferably of substantially equal size. When the exhaust valve is to be closed a hydraulic pressure is applied to a substantially smaller closing piston (17) which is also secured to the valve spindle (10). During the closing movement hydraulic liquid flows from the reservoir back to the holding chambre and after the closing movement that chamber is again connected to the hydraulic pressure which ensures that the valve member is maintained in its closed position against the gas pressure.
    公开号:SU1205783A3
    申请号:SU823494405
    申请日:1982-09-21
    公开日:1986-01-15
    发明作者:Грам Мадсен Джон
    申请人:Бэнд В.Дизель А/С (Фирма)；
    IPC主号:
    专利说明:

    "
    The invention relates to mechanical engineering, in particular, to the construction of the internal valves of an internal combustion piston engine (ICE), mainly two-stroke diesel engine, its piston, which is opened by the gas pressure in the combustion chamber (CS) and moves away from it and is closed by working pressure. fluid in the working chamber of the hydraulic cylinder.
    Figure 1 shows the exhaust valve according to the invention, an axial section; 2 schematically shows a valve control system; Fig. 3 shows the positions of the adjustable switches (.o,) and the control valves (s) and the outlet valve plunger (J depending on the position of the engine piston during the full operating cycle, where 1 is the positions of the switches and valves in TDC, II - their opposite positions.
    The exhaust valve for a two-stroke diesel engine with a predominantly two-stroke diesel engine with direct exhaust gas removal (Fig. 1) contains a plunger 1 installed in the exhaust channel 2 of the cylinder head 3 with the possibility of axial movement and blocking the outlet 4
    To the top of the head 3 cylinder; An intermediate block 3 is attached to the rail. A second intermediate block 6 is mounted on the upper part of the block 5. The casing 7 with a clamp 8 is mounted on the upper part of the block 6.
    The plunger 1 is rigidly connected to the rod 9p which passes through the blocks 5,6 and the casing 7.
    The rod 9 is rigidly connected to the pistons 1 O and 1 1 of different diameters, and the larger diameter piston 10 forms in the cylindrical bore of the head 3, together with the bottom side of the block 5, a larger diameter cavity 12 (holding), and this cavity adjoins the plunger 1, and the piston 11 of smaller diameter, together with a hole in the casing 7 and the upper clamp 8, forms a cavity 13 of the smaller diameter (closing cavity), with both cavities 12 and 13 forming the working chamber of the hydraulic cylinder.
    The additional piston 14 is also rigidly connected to the rod 9 and
    05783
    can move in the cylindrical hole of the block 6 and together with the upper side of the block 5 forms a buffer cavity 15 for the working
    5 fluids. The latter is located between the cavities 12 and 13. The chamber 16 above the piston is connected with the surrounding space through the channel 17 in the casing 7. The diameter of the additional piston 14
     About equal to the diameter of the piston 10.
    The buffer cavity 15 is communicated with a hollow space of 12 larger diameter with the help of four channels 18 in block 5, and in each channel is installed
    15 a control valve 19 provided with a closing spring 20 and an annular protrusion 21,
    The control of the opening and closing movements of the exhaust valve is realized by means of a hydraulic system (Fig.2) containing a high pressure line (MVA) 22 powered by a high pressure pump and a low pressure line
    25 (MFA) 23, in which the pressure is maintained just above atmospheric. For an engine in which the maximum pressure in the cylinder is about 100 bar, the pressure in the MVD may
    30 to be about 200 bar, and the pressure in the MFA is about 1.5 bar.
    The hydraulic system contains three external two-position adjustable switches 24.25, and 26
    35 for inlet and outlet of the working fluid in the cavities (from the cavities) 12,13 and 5. Valves 1 9. Are etched by switch 25 and, in addition, by the flow of the working fluid circulating
    40 between, cavity 12 and 15.
    A larger diameter cavity 12 is connected to MVD 23 via a check valve 27 to compensate for leaks. Used head 3 cylinder made channel 28
    45 for supplying fluid to the cavity 12, in the casing 7 - channel 29 for supplying liquid to the cavity 13 of smaller diameter a, and in block 5 - channels 30 for supplying liquid to the channels 18.
    5Q In addition, in block 6, channel 31 is completed.
    The buffer cavity 15 is additionally provided with a channel 32 for connecting to the MID 23 and the choke 33 is installed in the latter.
    55
    The cavity 3 of a smaller diameter is provided with an additional annular chamber 34 located around the stem.
    3
    9 and adjacent to the lower end of the piston 11 of smaller diameter, the chamber 3A provided with a channel 35 for connection to MVD 22.
    The valve works as follows
    At the position of the engine piston at TDC, the pressure at MVD 22 of the hydraulic system acts on cavity 12 through switch 24 and channel 28. Since the area of the piston is equal to or slightly larger than the area of the outlet orifice 4, while the pressure B; than the maximum pressure in the cylinder of the engine, the plunger 1 closes the outlet 4.
    The buffer cavity 15 is disconnected from cavity 2 because the valves 19 are closed, and since cavity 15 is permanently connected to MID 23 only through channel 32 with the throttle 33 installed in FIG. 2, the pressure in this cavity 15 is low. The cavity 13 is smaller diameter through switch 26 and channel 29 communicates with MID 23, while additional chamber 34 is permanently connected to MVD 22 through channel 35. The effective area of chamber 34 is so small that upwardly directed force acting on piston 11, as a result of pressure in chamber 34 insignificant compared to with downward directional force, which in the cavity 12 acts on the piston 10.
    During the engine stroke, switches 24,25,26 and valves 19 remain in the position shown in Figures 1 and 2 until switch 25 moves in response to a control signal, for example, from a camshaft cam, rotating synchronously with the engine crankshaft. This opens the flow of working fluid from the Ministry of Internal Affairs 22 through the channels 30 in block 5 to the annular projections 21 of the valves 19 (moment 1 of figure 3). However, the valves 19 are still closed, since at their lower ends there is a high fluid pressure in the cavity 12 and the force of the springs 2
    A little later (time tj in Fig. 3, the switch 24 moves to a position in which it shuts off channel 28. of MVD 22 and connects it to channel 31, which is connected to the buffer cavity 15. This cancels the pressure difference between cavities 12 and 15 and thus differential pressure.
    05783
    acting on the valves 19. The pressure force of the liquid acting on the annular protrusions 21 of the valves 19 exceeds the force of the springs 20 so that
    5, valves 19 move downwards and open four channels 18 in block 5 between cavities 15 and 12. Equalizing pressure between cavities 12 and 15 causes the force acting on piston 10 and the combustion chamber is able to move the plunger 1 upwards, i.e. the valve will open (FIG. 3).
    (5 During the movement of the plunger, the fluid in the cavity 12 flows into the cavity 15 through the open valves 19, and a small amount of liquid that was in the cavity
    20 13, flows through channel 29 and switch 26 to MFA 23.
    When the engine piston passes the NMT and moves up, the switch 26 moves (moment
    25 t3 Fig. 3), the cavity 13 is thereby connected through a switch to the MVD, and the pressure of the working fluid acting on the piston 11 will begin to move the rod 9 and the piston 2 connected with it down. At this time, the valves 19 are still open, so that through the channels 18, the fluid flows freely from the cavity 15 into the cavity 12.
    When the outlet 4 will be
     closed (time t /, FIG. 3), the switch 25 will occupy the position shown in FIG. 2, whereby the pressure of the liquid on the annular projections 21 of the valves 19 is reduced, and
    thirty
    40
    45
    the valves 19 are closed by the action of the springs 20 (Fig. 3g).
    At the time of Time i: g, the switches 24 and 26 accept the control
    50
    signals that cause them to move to opposite positions, whereby fluid from the MVD is again supplied to cavity 12, which during the rest of the compression stroke and the subsequent stroke in the engine cylinder keeps the plunger I in the closed position. At the same time, the pressure in cavity 13 drops as a result of the connection of this cavity with the MFA. If necessary, switch 26 can be moved later than switch 24.
    2d
    2
    fiyo.1.
    9 (1).
    Bfttt
      iffT
    权利要求:
    Claims (5)
    [1]
    . 1. EXHAUST VALVE FOR PISTON INTERNAL COMBUSTION ENGINE of a predominantly two-stroke diesel engine, comprising a plunger installed in the outlet channel of the head with the possibility of axial movement and blocking the outlet, rigidly connected to the control piston installed in the hydraulic cylinder and forming and connecting the working chamber in it an adjustable switch to the working chamber for its alternate communication with the inlet and outlet lines of the working fluid, characterized in that, in order to increase the conditions, the control piston is made in two stages, and the working chamber of the hydraulic cylinder is in the form of two cavities of different diameters so that the cavity of larger diameter is adjacent to the plunger, and the piston stages are placed in cavities of the corresponding diameter, and an adjustable switch is connected to each cavity of the working chamber,
    [2]
    2. The valve according to claim 1, characterized in that it is provided with a buffer cavity located between the cavities of the working chamber of the hydraulic cylinder, and an additional piston installed therein, rigidly connected to the plunger, the buffer cavity being in communication with the cavity of a larger diameter of the working chamber using the channel, and at least one control valve is installed in the latter.
    [3]
    3. Valve pop. 2, which is thin in that the diameter of the additional piston located in the buffer cavity is made equal to the diameter of the piston stage located in the cavity of a larger diameter working chamber.
    [4]
    4. The valve according to paragraphs 2,3, about t l. characterized in that the buffer cavity is additionally provided with a channel for connecting to a source of low pressure liquid and a throttle is installed in the channel.
    [5]
    5. The valve according to claims 1 to 4, characterized in that the section connecting the piston stages is made in the form of a rod and the cavity of a smaller diameter of the working chamber is equipped with an additional annular chamber located around the stem and adjacent to the lower end of the piston of a smaller diameter, and the annular chamber equipped with a channel for connecting to a source of high pressure fluid.
    类似技术:
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    SU1205783A3|1986-01-15|Exhaust valve for piston internal combustion engine
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    US5058857A|1991-10-22|Solenoid operated valve assembly
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    JPH01253515A|1989-10-09|Valve system for internal combustion engine
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    US4144851A|1979-03-20|Variable compression ratio engine
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    JP3564149B2|2004-09-08|Device for hydraulically operating an exhaust valve of a reciprocating internal combustion engine
    US5337712A|1994-08-16|Valve gear for at least two simultaneously operated valves
    KR970044120A|1997-07-26|Valve lift variable device of automobile engine
    KR100192602B1|1999-06-15|Device for controlling the exhaust valve of an internal combustion
    同族专利:
    公开号 | 公开日
    DK148757C|1986-02-17|
    JPS5865921A|1983-04-19|
    JPH0444081B2|1992-07-20|
    BR8205523A|1983-08-30|
    DK148757B|1985-09-16|
    AR228521A1|1983-03-15|
    KR840001678A|1984-05-16|
    KR890002578B1|1989-07-19|
    EP0075472A2|1983-03-30|
    DK419281A|1983-03-23|
    EP0075472B1|1986-12-10|
    US4484545A|1984-11-27|
    EP0075472A3|1984-05-30|
    DE3274667D1|1987-01-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2518319C2|2008-10-30|2014-06-10|Ман Трак Унд Бас Аг,De|Gas exchange valve system for ice and ice with such system|DE150218C|
    FR810679A|1935-10-08|1937-03-26|Interna Holding|Hydraulic valve control system in internal combustion or internal combustion engines|
    US2329662A|1941-11-12|1943-09-14|Wright Aeronautical Corp|Hydraulic valve gear|
    US3209737A|1962-06-27|1965-10-05|Mitsubishi Shipbuilding & Eng|Valve operating device for internal combustion engine|
    US3943825A|1972-04-17|1976-03-16|Caterpillar Tractor Co.|Hydraulic control system for load supporting hydraulic motors|
    US3851667A|1973-02-13|1974-12-03|V Goryainov|Pulsator for hydraulic systems controlling actuating mechanisms|
    US4088151A|1976-05-26|1978-05-09|Borg-Warner Corporation|Cylinder locking apparatus|
    JPS595763B2|1976-11-02|1984-02-07|Mitsubishi Heavy Ind Ltd|
    DE2940112A1|1979-10-03|1981-04-16|Daimler-Benz Ag, 7000 Stuttgart|PRESSURE CONTROLLER|JPH0235847B2|1983-04-28|1990-08-14|Hitachi Shipbuilding Eng Co|
    US5005538A|1990-07-03|1991-04-09|Bergeron Charles W|Extended circumference intake poppet valve system for opening and sealing a single valve seat|
    US5231959A|1992-12-16|1993-08-03|Moog Controls, Inc.|Intake or exhaust valve actuator|
    EP0738826B1|1995-04-18|2000-11-29|Wärtsilä NSD Schweiz AG|Hydraulic device with differential pistons and its application to a varible thrust drive|
    WO1997009516A1|1995-09-01|1997-03-13|Serge Vallve|Pneumatic engine valve assembly|
    US5762316A|1995-10-04|1998-06-09|Kraft Foods, Inc.|Valve mechanism with improved sealing|
    GB9614421D0|1996-07-09|1996-09-04|Mccain Foods Ltd|Pressure release valve|
    DK172961B1|1997-05-27|1999-10-18|Man B & W Dielsel As|Hydraulic central unit for a cylinder in an internal combustion engine|
    DK176152B1|2000-07-10|2006-10-16|Man B & W Diesel As|Method of activating an exhaust valve for an internal combustion engine and such an exhaust valve|
    US6899068B2|2002-09-30|2005-05-31|Caterpillar Inc|Hydraulic valve actuation system|
    US7067076B2|2003-08-01|2006-06-27|Rhodia Inc.|Flame retardant phosphonate additives for thermoplastics|
    US7318398B2|2003-08-15|2008-01-15|Caterpillar Inc.|Engine valve actuation system|
    AT500679B8|2004-06-16|2007-02-15|Ge Jenbacher Gmbh & Co Ohg|VALVE DRIVE|
    US20070241297A1|2006-04-13|2007-10-18|Honeywell International, Inc.|Guided pneumatic second stage switching valve|
    FR2901306B1|2006-05-19|2012-08-31|Renault Sas|THERMAL MOTOR FOR A MOTOR VEHICLE HAVING AN INVERSE VALVE WITH HYDRAULIC LOCKING|
    US20110265456A1|2010-04-29|2011-11-03|Caterpillar, Inc.|Diesel Engine and Method for Flexible Passive Regeneration of Exhaust After-Treatment Devices|
    SE539632C2|2014-10-15|2017-10-24|Freevalve Ab|Gas exchange valve actuator and internal combustion engine include gas exchange valve actuator|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DK419281A|DK148757C|1981-09-22|1981-09-22|EXHAUST VALVE FOR A Piston Incinerator|
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