• 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:
    Fuel injection system (100) comprising a first high pressure accumulator (1), a second high pressure accumulator (2) and a connecting piece (3). The first accumulator (1) has a first high-pressure chamber and the second accumulator (2), a second high-pressure chamber. The first accumulator (1) has a first connection (la) for a first injector and the second accumulator (2) a second connection (2a) for a second injector. The connecting piece (3) connects the first accumulator (1) to the second accumulator (2). The connecting piece (3) has a connecting channel which connects the two chambers.
    公开号:FR3039595A1
    申请号:FR1657198
    申请日:2016-07-27
    公开日:2017-02-03
    发明作者:Michael Madert；Erguen Filiz；Philippe Allio；Jerome Pedron
    申请人:Robert Bosch GmbH；
    IPC主号:
    专利说明:

    Field of the invention
    The present invention relates to a fuel injection system for an internal combustion engine comprising a first high-pressure accumulator, a second high-pressure accumulator and a connecting piece, the first high-pressure accumulator having a first upper chamber. -pressure and the second high-pressure accumulator having a second high-pressure chamber, the first high-pressure accumulator having at least one first connection for at least one first fuel injector and the second high-pressure accumulator having at least one second connection for at least one second fuel injector.
    State of the art
    Fuel injection systems comprising a high-pressure accumulator, for example according to DE 10 2008 040 901 A1, are known. The known high-pressure accumulator has a high-pressure chamber for receiving high-pressure fuel. Beside the connections for the pump and the injectors, there are also connections for other components. Usually, the two components installed on the accumulator are a ramp pressure sensor and a pressure regulating valve or pressure limiting valve.
    For larger engines or larger internal combustion engines, a fuel injection system with a larger high-pressure accumulator is required which requires a new production line.
    Purpose of the invention
    The object of the present invention is to make it possible to produce a fuel injection system requiring a volume of fuel under high high pressure and this with simple means without the need for a new production line.
    DESCRIPTION AND ADVANTAGES OF THE INVENTION For this purpose, the subject of the present invention is a fuel injection system for an internal combustion engine comprising a first high-pressure accumulator, a second high-pressure accumulator and a connecting piece. the first high pressure accumulator having a first high pressure chamber and the second high pressure accumulator having a second high pressure chamber, the first high pressure accumulator having at least one first connection for at least one first fuel injector and the first second high pressure accumulator having at least one second connection for at least one second fuel injector, said fuel injection system being characterized in that the connecting piece connects the first high pressure accumulator to the second high pressure accumulator, the connecting piece having a connecting channel which connects the first high pressure chamber to the second high pressure chamber ar a hydraulic connection.
    The fuel injection system according to the invention has the advantage, vis-à-vis the state of the art, of producing a high-pressure fuel accumulator of relatively large volume for the fuel injection system . This accumulator consists of two high-pressure accumulators manufactured in existing manufacturing lines. The global high-pressure accumulator formed of two high-pressure accumulators joined together is made in length so that the differences in the high-pressure connections of the different fuel injectors correspond to the difference between the engine cylinders and the engine manufacturer. thus has a single high-pressure pipe for the cylinders which has economic benefits resulting from standardization and logistics.
    The fuel injection system according to the invention for internal combustion engines comprises a first and a second high-pressure accumulator and a connecting piece. The first high pressure accumulator has a first high pressure chamber and the second accumulator a second high pressure chamber. The first high-pressure accumulator has at least one first connection for at least one first fuel injector and the second accumulator has at least one second connection for at least one second injector. The connecting piece connects the first and second high-pressure accumulators. This connecting piece has a connecting channel for hydraulically connecting the first and second high-pressure chambers.
    There is thus obtained a global high-pressure accumulator formed of the first high-pressure chamber, the second high-pressure chamber and the connecting channel; this global accumulator has a relatively large accumulation volume. This makes it possible to connect the fuel injectors of large engines to uniform high-pressure lines, connected to two high-pressure accumulators which are high-pressure accumulators manufactured on production lines for high-pressure accumulators of smaller engines. .
    According to an advantageous development, the connecting piece has a sealing head and the second high pressure accumulator has a corresponding sealing seat, the sealing head and the sealing seat being pressed against each other by a nut which makes it possible to seal for the high pressures prevailing in the two high-pressure accumulators.
    According to an advantageous development, the sealing seat is a flat seat particularly simple to manufacture. This makes it possible to compensate for axis or paralax defects between the two high-pressure chambers and the nuts.
    Advantageously, the sealing head has a peripheral sealing lip cooperating with the sealing seat. The prestressing force is thus transmitted by the relatively small surface of the sealing lip so that there are significant surface pressures at the sealing lip. The connection between the sealing piece and the second high-pressure accumulator is thus particularly fluid-tight.
    According to a development, the sealing head has a conical sealing surface cooperating with the sealing seat. Advantageously, the sealing seat is also conically shaped but with a slightly different cone angle to obtain a contact edge between the sealing surface and the sealing seat. In reality, there will be a relatively small contact area on which at least always high surface pressures will be exerted. This conical sealing surface cooperates by screwing with a centering effect on the connecting piece for the second high-pressure accumulator.
    According to a particularly advantageous development, the sealing head has a conical sealing surface cooperating with the sealing seat. In this embodiment, the sealing seat has an advantageously conical shape. This embodiment results in a relatively small contact surface between the sealing surface and the sealing seat, which allows sealing for the high pressure in the two high-pressure accumulators. The spherical sealing surface between the connecting piece and the second high-pressure accumulator forms a ball joint (or spherical-head connection) for compensating for angle defects between angle or alignment defects between two high-pressure accumulators.
    According to a development, the first high pressure accumulator has a thread and the connecting piece has a corresponding complementary thread, the thread and the complementary thread forming a screw connection. The connecting piece is thus screwed directly onto the first high-pressure accumulator, which constitutes a particularly simple and economical connection. In addition, this link can receive a seal.
    Alternatively, according to an advantageous development, the first high-pressure accumulator is connected to the connecting piece by a nut.
    In addition, the end of the connecting piece opposite the sealing head has another sealing head. The first high-pressure accumulator has another corresponding sealing seat. This other sealing head and the other sealing seat are tightened to one another by another nut, which allows sealing for particularly high pressures in the two high-pressure accumulators.
    Advantageously, the other sealing seat is a flat seat particularly simple to manufacture. In addition, this makes it possible to compensate for misalignments between the two high-pressure chambers and the other nut.
    According to one development, the other sealing head has a peripheral sealing lip or a sharp edge that cooperates with the other sealing seat. The prestressing force is transmitted by the relatively small surface of the other sealing lip so as to create high surface pressures at the other sealing lip. The connection between the sealing piece and the first high-pressure accumulator is in these conditions particularly fluid-tight.
    According to an advantageous development, the other sealing head has another conical sealing surface cooperating with the other sealing seat. Advantageously, the other sealing seat also has a conical shape but the angle of the cone is slightly different to thus ideally obtain a contact edge between the other sealing surface and the other seat. seal. In reality we will have a relatively small contact surface on which surface pressures will always be very high. The other conical sealing surface cooperates with a centering effect on the connecting piece with the first high-pressure accumulator at the time of screwing.
    According to a particularly advantageous development, the other sealing head has another spherical sealing surface cooperating with the other sealing seat. In this embodiment, the other sealing seat has an advantageous conical shape, which creates a relatively small contact area between the other sealing seat and the other sealing surface for sealing against pressures. elevations prevailing in both high-pressure accumulators. This other spherical sealing surface between the connecting piece and the first high-pressure accumulator is in the form of a spherical head or ball head compensating for misalignment or angular defect between the two high-pressure accumulators. pressure.
    If the connecting part of both the first high-pressure accumulator and the second high-pressure accumulator is in the form of a ball joint, this also makes it possible to compensate for paralax or parallel offset defects and positioning defects. two high-pressure accumulators.
    According to advantageous developments, the connecting piece has a median zone of reduced section. Thus, this median zone has less rigidity to compensate for positioning defects, tolerances and angular defects between the two high-pressure accumulators.
    According to advantageous developments, the connecting piece is made of a composite material steel / plastic reinforced with glass fibers. The connecting piece is then elastic enough to compensate for positioning defects, tolerances and / or angular defects.
    drawings
    The present invention will be described below in more detail with the aid of embodiments of an internal combustion engine fuel injection system shown in the accompanying drawings, in which: FIG. fuel injection system comprising a first high-pressure accumulator, a second high-pressure accumulator and a connecting piece, FIG. 2 is a longitudinal sectional view of the first embodiment of the fuel injection system, this view being limiting to the main elements, FIG. 3 is a longitudinal sectional view of another embodiment of the fuel injection system being limited to the essential parts, FIG. 4 is a longitudinal section of another embodiment of FIG. a fuel injection system of which only the essential parts are represented.
    Description of embodiments
    Figure 1 is a perspective view of a fuel injection system 100 composed of a first high-pressure accumulator 1, a second high-pressure accumulator 2 and a connecting piece 3 mainly cylindrical; the connecting piece 3 is located between the first high-pressure accumulator 1 and the second high-pressure accumulator 2. According to the invention, the connecting piece 3 connects the two high-pressure accumulators 1, 2 to form a global accumulator, relatively large, composed of two high-pressure accumulators 1, 2. Thanks to the modular construction of the fuel injection system 100 can be used high-pressure accumulators 1, 2 existing, making only slight modifications, even to no modification, to the existing lines of manufacture.
    The two high-pressure accumulators 1, 2 each have injector connections 1a, 2a, characteristics of a high-pressure accumulator and pump connections 1d, 2d. By way of example, for each high-pressure accumulator 1, 2 there are three injector connections 1a, 2a and two pump connections 1d, 2d. The pump connections 1d, 2d are connected to a high-pressure pump (not shown) which supplies the two high-pressure accumulators 1, 2 with high-pressure fuel. According to the variant embodiments, the pump connections 1d, 2d can also be connected to several high-pressure pumps. In addition, the two high-pressure accumulators 1, 2 may have other connections. In the embodiment of Figure 1, the first high-pressure accumulator 1 has a pressure sensor lb provided with an electrical connection. The second high-pressure accumulator 2 has a pressure regulating valve 2b with an electrical connection and a low-pressure connection 2c. The low-pressure connection 2c is connected to a low-pressure circuit that is not detailed.
    Figure 2 shows, in longitudinal section, a portion of an embodiment of the fuel injection system 100 according to the invention. The first high pressure accumulator 1 has a first high pressure chamber 10 and the second high pressure accumulator 2 has a second high pressure chamber 20. The injector connections 1a, 2a and the pump connections 1d, 2d open in the high-pressure chamber 10, 20 respectively. The connecting piece 3 has a connecting channel 30 in the form of a through hole connecting the first high-pressure chamber 10 to the second high-pressure chamber 20 by a hydraulic connection.
    The connection between the first high-pressure accumulator 1 and the connecting piece 3 of the embodiment of Figure 2 is a screw connection. For this, the first high-pressure accumulator 1 has a thread 11 at its end adjacent to the connecting piece 3; this thread 11 is in the form of an internal thread. Thread 11 is a bore larger than the bore of the high pressure chamber 10 and has a thread. The connecting piece 3 has, appropriately, a complementary thread 31 corresponding in the form of an external thread, which allows to screw the connecting piece 3 in the first high-pressure accumulator 1. The seal between the first high-pressure accumulator 1 and the connecting piece 3 is made by a sharp edge 39 formed on the connecting piece 3 which is dimensioned according to the necessary sealing force at high pressure. However, it is possible to envisage variants of sealing principles, for example a conical seat like that presented in FIG.
    The connection between the second high-pressure accumulator 2 and the connecting piece 3 is done by means of a nut 4, the nut 4 of this embodiment of FIG. 2 is in the form of a cap nut. . Advantageously, the connection is in the form of a ball joint, which makes it possible to compensate for the tolerances and in particular the angle defects between the two high-pressure accumulators 1,2.
    The connection is made with the following constructional features: - the nut 4 has a nut head 41 and a nut thread 42. The nut thread 42 is an internal thread, - the connecting piece 3 comprises in its outer zone a shoulder-ment 32 and a sealing head 33. The sealing head 33 is in the form of a sealing surface 34 conically, narrowing towards the second high-pressure chamber 20. Alternatively, the sealing head 33 has a spherical sealing surface 34 for making a ball joint connection; the second high-pressure accumulator 2 comprises an external thread 21 and a conical sealing seat 22; the sealing seat 22 cooperates with the sealing surface 34. The conical sealing seat 22 opens into the upper chamber 20 and widens towards the connecting piece 3. In the example embodiment of Figure 2, the outer thread 21 radially surrounds the sealing seat 22. The nut 4 is screwed by its thread 42 on the outer thread 21 of the second high-pressure accumulator 2. The nut head 41 cooperates with the shoulder 32 of the connecting piece 3 and pushing the sealing head 33 or the sealing surface 34 against the sealing seat 22 of the second high-pressure accumulator 2. The connecting piece 3 is thus packed into the axial direction by this type of connection screwed between the shoulder 32 and the sealing head 33; the nut 4 is correspondingly stretched between its head 41 and its thread 42. The second high-pressure accumulator 2 is stretched in the outer zone, that is to say in the zone of the external thread 21 and is compressed in the inner zone, that is to say in the area of the sealing seat 22.
    In the embodiment of Figure 2, the two links, that is to say between the first high-pressure accumulator 1 and the connecting piece 3 and between the second high-pressure accumulator 2 and the piece 3 are made to ensure the same tightness to high-pressure fluids: the sharp edge 39 of the connecting piece 3 cooperates with a sealing surface of the first high-pressure accumulator 1 to achieve fluid tightness, the sealing head 33 or the sealing surface 34 of the connecting piece 3 cooperates with the sealing seat 22 of the second high-pressure accumulator 2 so as to achieve fluid tightness.
    Alternatively or additionally, it is also possible to use sealing elements to achieve sealing. In the first place, the different possibilities of connection between the two high-pressure accumulators 1, 2 and the connecting piece 3 will be presented.
    Figure 3 shows another embodiment of the fuel injection system 100 according to the invention by a longitudinal section. The connection between the first high-pressure accumulator 1 and the connecting piece 3 is similar to that of the first connection example according to FIG. 2 in the form of a screw connection; in this connection, the connecting piece 3 is screwed into the first high-pressure accumulator 1.
    The connection between the second high-pressure accumulator 2 and the connecting piece 3 is made with the nut 4. The embodiment of the nut 4 differs from that of the embodiment of FIG. nut 42 is an external thread from a corresponding internal thread 23 of the second high-pressure accumulator 2. The end of the connecting piece 3 facing the second high-pressure accumulator 2 has a groove 35 in the radial direction. In the axial direction, the groove 35 is substantially opposite the thread 42 of the nut, radially on the inside. The groove 35 receives an elastic ring 6. The elastic ring 6 transmits the prestressing force between the nut 4 and the connecting piece 3. To transmit the preload, the nut 4 has a recess 43 on the frontal side which receives the 6. By screwing the nut 4 in the internal thread 23 of the second high pressure accumulator 2, the nut 4 pushes the elastic ring 6 applied in the recess 43 against the receiving groove 35 of the connecting piece. 3.
    In addition, the connecting piece 3 cooperates with the sealing seat 22 of the second high-pressure accumulator 2. In the embodiment of FIG. 3, the sealing seat 22 is a flat seat, but it can also conical shape. If the sealing seat 22 is a flat seat, it is particularly advantageous that the sealing head 33 of the connecting piece 3 or the end face of the connecting piece 3 comprises a peripheral sealing lip 36 cooperating with the Sealing seat 22. The prestressing force of the connection of the nut 4 of the connecting piece 3 and the second high-pressure accumulator 2 is transmitted between the sealing seat 22 and the sealing lip 36. thus realizes a large surface pressure between the sealing seat 22 and the sealing lip 36 which ensures good sealing.
    In the embodiment of Figure 3, the connecting piece 3 has a median zone 3a of reduced section. This embodiment of the connecting piece 3 is not limited to the embodiment of Figure 3, but applies to all variants. The median zone 3a thus narrowed has less rigidity. This makes it possible to compensate for the positioning errors and the tolerances of the two high-pressure accumulators 1, 2. The positioning defects can be generated at the time of mounting of the two high-pressure accumulators 1, 2 on the internal combustion engine.
    Alternatively or in addition to the median zone 3a of reduced section, the connecting piece 3 can be made of a steel / plastic material reinforced with fibers so that the connecting piece 3 is sufficiently elastic to compensate for defects positioning and tolerances.
    FIG. 4 shows another exemplary embodiment of the fuel injection system 100 according to the invention in longitudinal section; the connecting piece 3 is a connecting piece with a double spherical head or double ball head. The connection between the part 3 and the first high-pressure accumulator 1 as well as between the connecting piece 3 and the second high-pressure accumulator 2 are thus each constituted by a ball joint; a ball joint has already been described in the embodiment of Figure 2. The nut 4 connects the connecting piece 3 to the second high-pressure accumulator 2. The nut 4 is screwed by its thread 42 on the thread 21 of the second high-pressure accumulator 2; the thread 21 is an external thread so that the nut head 41 cooperates with the shoulder 32 of the connecting piece 3 and pushes the sealing head 33 against the sealing seat 22 of the second high-pressure accumulator 2 The sealing head 33 is advantageously provided with a sealing surface 34 of conical or spherical shape.
    Another nut 5 connects the connecting piece 3 to the first high-pressure accumulator 1. The connection of the embodiment of FIG. 4 is analogous to the connection with the second high-pressure accumulator 2. The other nut 5 is provided with another thread 52 in the form of internal thread screwed onto the thread 11 of the first high-pressure accumulator 1; the thread 11 is an external thread. The end of the connecting piece 3 opposite that of the shoulder 32 has in the outer zone, another shoulder 37 and another sealing head 38. The threading screw 52 of the nut on the 11 thread makes cooperate the other nut head 51 of the other nut 5 with the other shoulder 37 and pushes the other sealing head 38 and its other sealing surface 39 against the other sealing seat 12 made in the first high-pressure accumulator 1.
    In a similar manner to the sealing head 33, the other sealing head 38 may, according to a development of the invention, have a conical shape, spherical or a sealing lip. Different combinations are possible: the connecting piece 3 with a spherical head connection: for example a sealing head 33 with a conical sealing surface 34 and another sealing head 38 with another spherical sealing surface 39 The connecting piece 3 with the sealing surface 34 of the sealing head 33 is centered in the second high-pressure accumulator 2, at the same time the angle defects between the two high-pressure accumulators 1 can be compensated. , 2 by the spherical sealing surface 39 of the sealing head 38, the connecting piece 3 with two ball joints: the two sealing heads 33, 38 each having a conical sealing surface 34, 39. This makes it possible to compensate for both angle errors and also the offsets in parallel and the positioning errors of the two high-pressure accumulators 1,2.
    In addition to or in a variant of the means developed above, it is also possible to use a "flexible" connecting piece 3. For example, by reducing the section or using less rigid materials (composite materials, plastics) the connecting piece 3 can be made elastic or at least in parts. Tolerances, angle errors, parallel offsets or misalignments of the two high-pressure accumulators 1,2 can also be compensated.
    NOMENCLATURE OF THE MAIN COMPONENTS 1 First high-pressure accumulator 1a, 2a Injector connection ld, 2d Pump connection 2 Second high-pressure accumulator 2c Low-pressure connection 3 Connecting piece 4 Nut 5 Nut 6 Elastic ring 10 First upper chamber pressure 11 Thread 12 Sealing seat 20 Second high-pressure chamber 21 Outer thread 22 Tapered sealing seat 23 Inner thread 30 Connecting pipe 31 Thread 32 Shoulder 33 Seal 34 Sealing surface 35 Nut / Throat 36 Spout Sealing 37 Shoulder 38 Sealing head 39 Sharp edge / sealing surface 41 Nut head 42 Nut thread 43 Grip 52 Nut thread 100 Fuel injection system
    权利要求:
    Claims (14)
    [1" id="c-fr-0001]
    1) Fuel injection system (100) for an internal combustion engine comprising a first high pressure accumulator (1), a second high pressure accumulator (2) and a connecting piece (3), - the first high pressure accumulator (1) having a first high pressure chamber (10) and the second high pressure accumulator (2) having a second high pressure chamber (20), - the first high pressure accumulator (1) having at least one first connection (la) for at least one first fuel injector and the second high pressure accumulator (2) having at least one second connection (2a) for at least one second fuel injector, fuel injection system characterized in that the connecting piece (3) connects the first high-pressure accumulator (1) to the second high-pressure accumulator (2), the connecting piece (3) having a connecting channel (30) connecting the first high-pressure accumulator (1) high-pressure chamber (10) to the second high-pressure chamber (20) by a hydraulic connection.
    [0002]
    2) fuel injection system (100) according to claim 1, characterized in that the connecting piece (3) has a sealing head (33) and the second high-pressure accumulator (2) has a seat seal (22) corresponding, the sealing head (33) and the sealing seat (22) being tightened against each other by a nut (4).
    [0003]
    3) Fuel injection system (100) according to claim 2, characterized in that the sealing seat (22) is a flat seat.
    [0004]
    4) Fuel injection system (100) according to claim 3, characterized in that the sealing head (33) has a peripheral sealing lip (36) cooperating with the sealing seat (22).
    [0005]
    A fuel injection system (100) according to claim 2, characterized in that the sealing head (33) has a conical sealing surface (34) cooperating with the sealing seat (22).
    [0006]
    Fuel injection system (100) according to claim 2, characterized in that the sealing head (33) has a spherical sealing surface (34) cooperating with the sealing seat (22).
    [0007]
    Fuel injection system (100) according to claim 1, characterized in that the first high-pressure accumulator (1) has a thread (11) and the connecting piece (3) has a complementary thread (31). ) corresponding, the thread (11) making a connection screwed with the corresponding thread (31).
    [0008]
    8 °) fuel injection system (100) according to claim 1, characterized in that the end of the sealing piece (33) opposite the sealing head (33) has another head seal (38) and the first high-pressure accumulator (1) has another corresponding sealing seat (12), this other sealing head (38) and the other sealing seat (12) being tightened against each other by another nut (5).
    [0009]
    9) Fuel injection system (100) according to claim 8, characterized in that the other sealing seat (12) is a flat seat.
    [0010]
    Fuel injection system (100) according to claim 9, characterized in that the other sealing head (38) has another peripheral sealing lip cooperating with the other sealing seat (12). ).
    [0011]
    Fuel injection system (100) according to claim 8, characterized in that the other sealing head (38) has a further conical sealing surface (39) cooperating with the other seat. sealing (12).
    [0012]
    Fuel injection system (100) according to claim 8, characterized in that the other sealing head (38) has another spherical sealing surface (39) cooperating with the other seat of sealing (12).
    [0013]
    13 °) fuel injection system (100) according to claim 1, characterized in that the connecting piece (3) has a central region (3a) of reduced section.
    [0014]
    14 °) fuel injection system (100) according to claim 1, characterized in that the connecting piece (3) is made of a composite material steel / fiber-reinforced synthetic material.
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3039595B1|2020-05-08|
    DE102015214333A1|2017-02-02|
    引用文献:
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    DE19747736C1|1997-10-29|1999-04-08|Siemens Ag|Pressure reservoir for IC engine common-rail fuel injection supply system|
    DE10101476A1|2001-01-12|2002-07-25|Bosch Gmbh Robert|Common rail unit|
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    DE102011056118A1|2011-12-07|2013-06-13|L'orange Gmbh|Modular common rail system for internal combustion engine, comprises nozzle unit opening against spring force in pressurized manner, where control units of fuel injecting units have adjusting and control elements separated from nozzle units|
    JP5938305B2|2012-08-30|2016-06-22|マルヤス工業株式会社|High pressure fuel delivery pipe for direct injection engines|DE102017216643A1|2017-09-20|2019-03-21|Robert Bosch Gmbh|Water injection device of an internal combustion engine|
    EP3734059A4|2018-02-02|2021-03-31|Mazda Motor Corporation|Fuel supply device for engine|
    FR3082958B1|2018-06-20|2020-09-11|Bosch Gmbh Robert|PRESSURE REGULATOR FOR COMMON RAMP AND COMMON RAMP EQUIPPED WITH SUCH A PRESSURE REGULATOR|
    法律状态:
    2017-07-20| PLFP| Fee payment|Year of fee payment: 2 |
    2018-07-23| PLFP| Fee payment|Year of fee payment: 3 |
    2019-01-25| PLSC| Search report ready|Effective date: 20190125 |
    2019-07-24| PLFP| Fee payment|Year of fee payment: 4 |
    2020-07-27| PLFP| Fee payment|Year of fee payment: 5 |
    2021-07-22| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102015214333.3|2015-07-29|
    DE102015214333.3A|DE102015214333A1|2015-07-29|2015-07-29|Fuel injection system|
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