• 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 dual-fuel injector for a cylinder (2) of an internal combustion engine (1), with at least one first nozzle valve (7), via which a first fuel, in particular diesel, is introducible into a combustion chamber (5) of the respective cylinder (2), and with at least one second nozzle valve (9), via which a second fuel, in particular methanol, is introducible into the combustion chamber (5) of the respective cylinder (2), wherein in the region of the or each second nozzle valve (9) a nozzle needle of the respective second nozzle valve (9) is guided in a needle guide of the same, wherein the needle guide defines a needle fuel chamber, which is suppliable with the second fuel with a defined fuel pressure via a supply line, at least in sections, wherein in the region of the or each second nozzle valve (9) the needle guide of the respective second nozzle valve (9) is suppliable with a sealing and lubricating oil in order to avoid, on the one hand, the second fuel escaping into the surroundings via the needle guide and on the other hand lubricate the respective nozzle needle in the needle guide, wherein the or each second nozzle valve (9) is assigned a switching valve (18), which supplies the respective needle fuel chamber of the respective second nozzle valve (9) with the second fuel as a function of an injection cycle of the respective cylinder (2) via the supply line, so that the fuel pressure of the second fuel is present in the needle fuel chamber as a function of the injection cycle, and wherein the needle guide of the respective second nozzle valve (9) defines a needle lubricating chamber suppliable by the sealing and lubricating oil at least in sections, which has a distance from the respective needle fuel chamber that is dimensioned in such a manner that in particular when in the respective needle fuel chamber the fuel pressure of the second fuel as a function of the injection cycle is present, the second fuel does not enter the region of the needle lubricating chamber.
    公开号:FI20185834A1
    申请号:FI20185834
    申请日:2018-10-04
    公开日:2019-04-10
    发明作者:Johann Wloka；Ludwig Maier；Holger Schaar
    申请人:Man Energy Solutions Se；
    IPC主号:
    专利说明:

    MAN Diesel & Turbo SE
    DUAL-FUEL INJECTOR, DUAL-FUEL SYSTEM, INTERNAL COMBUSTION ENGINE AND METHOD FOR OPERATING THE SAME
    The invention is a dual-fuel injector. The invention, furthermore, is a dual-fuel system.
    Dual-fuel internal combustion engines, which are in the first phase of the second fuel, are thoroughly known from practice. The fuel combusted in the first operating mode is preferentially liquid fuel such as for example diesel. The second fuel combusted in the second operating mode can either be a gas fuel, or as a fuel. In the second operating mode, the first fuel is preferentially utilitarian for igniting the second fuel. The invention of a fuel used as a fuel in a single case. A dual-fuel internal combustion engine is a dual-fuel system. Dual-fuel injectors known for the second nozzle valves, and the second nozzle valves serve the second cylinder, and the second nozzle valves serve for the second. fuel into the combustion chamber of the cylinder. Alternatively ethanol or LPG.
    Nozzle needle is the nozzle of the nozzle valve of the nozzle valve of the nozzle of the nozzle. valve defines a needle fuel chamber at least in sections. The fuel needle is a fuel in the air. This is not the case for the second nozzle valve.
    Which diesel fuel moreover is non-toxic. Methanol, by contrast, which is an introductory via the second nozzle valves into the combustion chamber. by the second nozzle guard in the region of the second one, the second guide to the second one nozzle needle in the needle guide.
    In a dual-fuel injectors known as a fuel, the second fuel is permanently present in the second fuel, which can be used as a fuel. particular in the order of magnitude of approximately 600 bar. This is a dual-fuel injector, which is a dual-fuel injector. lubricating oil that is under high pressure. This is Complicated and disadvantageous. DE 10 2014 014 452 B4 discloses a dual fuel injector according to the prior art with a second fuel.
    Starting out of the new combustion engine is a dual-fuel system and an internal combustion engine.
    This article was previously published under Q307483 The function of the injection cycle is the second fuel in the injection cycle. The needle guide of the second nozzle valve defines the need for a needle, which is a need to be cleaned up. the fuel is the second type of fuel, the second fuel is present in the needle.
    Because of the fact that the fuel pressure is the second in the fuel. the second fuel is not permanently present in the needle. the sealing and lubricating oil is a definite continent;
    The sealing function and the lubricating function of the second fuel in the second operating mode. The fuel pressure of the second fuel is present, which is more than the second fuel. oil pressure of the sealing oil, the second fuel does not enter the region. Insofar, the sealing and lubricating function of the sealing and lubricating oil.
    The second nozzle valves are assigned a common switching valve. This is an advantageous design for the dual-fuel injector.
    According to an advantageous further development, the switching valve is a dual-fuel injector. This makes it possible to replace the switching valve.
    The dual-fuel system is defined in the Claim 9;
    Preferred further developments. Exemplary embodiments of the invention are explained in detail by the drawing without being restricted to this. There it shows:
    Fig. 1: a block diagram of a dual-fuel system,
    Fig. 2: an extract from a dual-fuel injector in the region; and
    Fig. 3: extract of Fig. 2 in the opened state of the second nozzle valve.
    The invention is a dual-fuel injector and dual-fuel injector.
    Fig. 1 shows a schematic of the internal combustion engine of a single combustion engine. Of the cylinder 2, a cylinder head 3 and a piston 4 are shown, and a piston 4 delimit a combustion chamber 5 of the cylinder.
    The Cylinder Head 3 Receives The Cylinder 2 A Dual Fuel Injector 6 2 the multiple fuel injector 6;
    The first fuel is a first liquid fuel. The second fuel 10 is also a liquid fuel, or liquid petroleum gas.
    The first fuel tank 12 is the first fuel tank 12, the first fuel is 12 fuel supply system 11 and the first fuel tank 12, the the dual fuel injector 2, the the first fuel pump 2. The the first fuel pump 13 can be a so-called cylinder-individual plug-in pump, which is an example of a magnitude of at least 1,500 bar, or 1,500 bar to 2,500 bar.
    The Second Nozzle Valves 9 The Second Nozzle Valves 9 The Second Nozzle Valves 2 The Second Fuel Supply System 2 14. A second fuel pump 14 a second fuel tank 14 into a fuel storage unit 17, in which the fuel is kept, the order of magnitude of approximately 600 bar. Emanating from a storage unit 17, a second-generation injector 6 a switching valve 18 is coupled, which does not to get the second fuel in the combustion chamber 5 into the combustion chamber 5 of the relevant cylinder 2.
    Fig. 1, furthermore, shows a sealing and lubricating oil system 19, which can be used as a lubricant; valves of the dual-fuel injector 6.
    Fig. 2 and 3 show the second fuel injector 6, which serves as an injector for the second fuel into the combustion chamber. second nozzle valve 9 is closed and in Figure 3 the same is opened.
    Fig. 2 and 3 is a guide for the second nozzle valve of the dual-fuel injector 6 shown in FIG. 23 of the dual fuel injector 6. The needle guide 22 of the dual fuel injector 24, which is a supplement to the second fuel. switching valve 18 and the supply line 25 for the second fuel injector;
    As the second fuel valve is the second fuel valve. as a function of the cycle of the cylinder 2, ie the function of the cylinder; Fig. 3 is opened, i.e. when the contour 2 of the needle guide 22 is the second nozzle valve 9 is closed because of the fact that the contour 26 of the needle guide 22, the switching valve 18 is closed so that the needle fuel chamber 24 is the second fuel via the supply line. pressure of the second fuel is then present in the needle fuel chamber 24.
    In Fig. 3, the flow of the second fuel with opened second line, which, emanating from the opened switching valve 18, is the supply line 25 via the supply line 25 and 21 in the combustion chamber 5 in the combustion chamber 2 in the combustion chamber 2 in the dash -dotted lines that the second fuel is not supplied, the second fuel is not provided, the second fuel is then not present. In the state of Fig. 3, the sealing and lubricating oil flow in the region 24.
    According to Fig. 2 and 3, the needle guide 22 of the second nozzle valve 9 delimits, furthermore, a needle lubricating chamber 29 that is suppliable with the sealing and lubricating oil. Fig. 2 and 3, according to the dashed arrow lines shown in Fig. 2 and 3, the need needle lubricating chamber 29 is an additive with the sealing and lubricating oil system 19 in order to lubricate on the one hand the need sealing needle 21 in the needle needle guide 22 and on the needle guide 22.
    Here, seen in the direction of the nozzle needle 21 of the needle fuel chamber 24 and the needle lubricating chamber 29 is dimensioned in such a continent the fuel of the second fuel (see Fig. 3) is the fuel of the second fuel. That is, the need for lubricating chamber 29, however, is the only way to get rid of the needle. fuel pressure of the second fuel.
    With the dual-fuel injector, the need for a fuel injection is the most important one. the need cylinder 2, so that is the second fuel in the needle fuel chamber 24 is not permanently present but only as a function of the injection cycle. The needle lubricating chamber 29, which is the distance from the needle fuel chamber 24, is permanently supplied with the fuel pressure of the second fuel. Typically, the bar is about 10 bar. 24, the second fuel, the second fuel, the second fuel, the second fuel is present in the needle fuel chamber 24, can indeed migrate in the direction of the needle lubricating chamber 29, but not the region of the needle lubricating chamber 29 and the needle lubricating chamber 29 is a dimensioned as a function of the pressure of the second fuel.
    The second nozzle valves 9 of the dual-fuel injector 6 of the dual-fuel injector 6 of the dual-fuel injector. the need cylinder 2 are assigned to a common switching valve 18, which is a non-standard switching valve.
    1 Fuel supply system 15 Reservoir 13 Fuel pump 14 Fuel supply system 15 Reservoir 13 16 Fuel pump 17 Reservoir 18 Switching valve 19 Sealing and lubricating oil system 20 Reservoir 21 Nozzle needle 22 Supply line 26 Contour 27 Valve seat 28 Orifice 29 Needle lubricating chamber
    权利要求:
    Claims (10)
    [1]
    1. Duel fuel injector (6) for cylinder (1) of internal combustion engine (1)
    [2]
    2) for having at least one first nozzle valve (7) through which
    5, and at least one second nozzle valve (9) through which the second fuel, especially methanol, can be introduced into the combustion chamber (5) of each cylinder (2), whereby or in the region of each other nozzle valve (9)
    A nozzle needle (21) for the respective second nozzle valve (9) to its needle guide (22), wherein the needle guide (22) defines at least partially a needle fuel space (24) for supplying a second fuel at a specified fuel pressure through the supply line (25). 9) a sealing and lubricating oil may be supplied to the needle guide (22) of each of the second nozzle valves (9) to prevent leakage of second fuel through the needle guide (22) and to lubricate each nozzle needle (21) in the needle guide (22) one or each second nozzle valve (9) is provided with a coupling valve 20 (18) for supplying to the respective needle fuel space (24) the respective second nozzle valve (9) via a supply line (25) with a second fuel depending on the injection fuel of the respective cylinder (2); neu in the fuel mode (24), depending on the injection rate, the needle guide (22) of each second nozzle valve (9) defines
    A needle lubricating chamber (29) fed at least partially with sealing and lubricating oil having a dimensioned distance (X) from the respective needle fuel chamber (24) such that, when the respective needle fuel chamber (24) has a second fuel, 29) to the area.
    A dual fuel injector according to claim 1, characterized in that it comprises a single central first nozzle valve (7).
    [3]
    Dual fuel injector according to claim 1 or 2, characterized in that it comprises a plurality of second nozzle valves (9).
    [4]
    A dual fuel injector according to claim 3, characterized
    35, wherein the second nozzle valves (9) are disposed around the first nozzle valve (7).
    20185834 prh 04-10-2018
    [5]
    Dual fuel injector according to claim 3 or 4, characterized in that a common switching valve (18) is provided on the second nozzle valves (9).
    [6]
    A dual fuel injector according to any one of claims 1 to 5,
    5, characterized in that the switching valve (18) is located outside the base body (23) of the dual fuel injector (6).
    [7]
    An internal combustion engine dual fuel system) comprising a dual fuel injector (6) according to any one of claims 1 to 6 for the respective internal combustion engine cylinder (2),
    A first fuel supply system (11) through which the first fuel can be supplied to each respective dual fuel injector (6), a second fuel supply system (14) through which a second fuel can be supplied to each respective dual fuel injector (6), a sealing and lubricating oil system (19) , through which you can enter
    15 sealing and lubricating oil for each dual fuel injector (6).
    [8]
    A dual fuel fuel system according to claim 7, characterized in that the second fuel supply system (14) makes the second fuel available for use at a specified fuel pressure,
    The sealing and lubricating oil system (19) provides the sealing head with lubricating oil at a specified oil pressure less than the fuel pressure of the second fuel.
    [9]
    9. An internal combustion engine having at least one cylinder (2),
    25 having a dual fuel fuel system according to claim 7 or 8.
    [10]
    A method for operating an internal combustion engine machine (1) according to claim 9, wherein one or each other nozzle valve (9) is supplied with a different fuel depending on the injection cycle of the respective cylinder (2).
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102017123315.6A|DE102017123315A1|2017-10-09|2017-10-09|Dual-fuel injector, dual-fuel fuel system, internal combustion engine and method of operating the same|
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