Common rail pipe and fuel common rail system for engine

Abstract

The utility model discloses a common rail pipe and fuel common rail system for engine, the common rail pipe comprises a pipe body, an installation seat for installing a fuel control valve is integrally formed on the pipe body, the installation seat protrudes out of the outer surface of the pipe body, the installation seat is provided with an accommodating cavity which is communicated with a pipe cavity of the pipe body through a first channel and is used for accommodating the fuel control valve, and the fuel control valve is arranged in the accommodating cavity. The mounting seat is provided with a mounting hole for the fuel control valve to enter and exit from the accommodating cavity and a fuel outlet for conveying fuel. According to the common rail pipe, the arrangement structure of a fuel common rail system can be simplified, and convenience can be provided for assembly and later maintenance work.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a common rail pipe and a fuel common rail system for engines. Background Technology

[0002] The common rail fuel system of an engine is a fuel supply system that uses common rail technology to completely separate the generation of fuel (e.g., fuel oil) injection pressure from the injection process. Traditional common rail fuel systems have a relatively complex layout, which makes assembly and subsequent maintenance inconvenient. Utility Model Content

[0003] In view of this, one objective of this utility model is to provide a common rail pipe to simplify the layout of the fuel common rail system and facilitate assembly and subsequent maintenance. Another objective of this utility model is to provide a fuel common rail system for an engine that includes the aforementioned common rail pipe.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A common rail pipe includes a pipe body, on which an integrally formed mounting seat for mounting a fuel control valve is formed. The mounting seat protrudes from the outer surface of the pipe body and has a receiving cavity for accommodating the fuel control valve, which communicates with the lumen of the pipe body through a first channel. The mounting seat is provided with a mounting hole for the fuel control valve to enter and exit the receiving cavity and a fuel outlet for transmitting fuel.

[0006] Optionally, the common rail includes a connector fixedly connected to the mounting base. The connector has a second channel and a third channel extending outward from the fuel outlet in different directions. The connector has a mounting surface for mounting and engaging with the engine. The ends of the second channel and the third channel away from the fuel outlet extend through to the mounting surface.

[0007] Optionally, in the above-mentioned common rail pipe, the connector is integrally formed with the mounting base, and the connector has a support portion connected to the outer surface of the pipe body.

[0008] Optionally, in the above-mentioned common rail pipe, the projection of the connector along the target direction is triangular or V-shaped, and the target direction is a direction perpendicular to the mounting surface.

[0009] Optionally, in the common rail described above, the mounting base is raised at the end where the mounting hole is located and is provided with a flange that mates with the fuel control valve.

[0010] Optionally, in the above-mentioned common rail pipe, the outer surface of the pipe body is provided with a feed pipe connector for connecting to the pipeline.

[0011] Optionally, in the common rail described above, the feed pipe fitting is configured as a fitting body for realizing a ferrule fitting.

[0012] Optionally, in the aforementioned common rail pipe, at least one end of the pipe body is sealed by a sensor installed at the pipe opening.

[0013] Optionally, in the common rail described above, the sensor is configured as a temperature sensor, a pressure sensor, or a temperature-pressure sensor.

[0014] A common rail fuel system for an engine, comprising a common rail as disclosed in any of the foregoing.

[0015] The common rail pipe provided by this utility model has the following beneficial effects:

[0016] The common rail of this invention includes a mounting seat that protrudes from the outer surface of the pipe body and is integrally formed with the pipe body. The mounting seat is used to install the fuel control valve. That is, the common rail of this invention integrates the mounting seat for installing the fuel control valve into the pipe body, thus simplifying the engine's common rail system to a certain extent. This makes both the assembly and subsequent maintenance of the common rail system more convenient. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a three-dimensional schematic diagram of a common rail pipe according to an embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the common rail pipe from another perspective;

[0020] Figure 3 yes Figure 1 A partial cross-sectional view of the common rail pipe shown.

[0021] The diagram is marked as follows:

[0022] 1. Pipe body; 11. Pipe cavity; 12. First channel; 2. Mounting base; 21. Mounting hole; 22. Flange; 3. Feed pipe connector; 4. Sensor; 5. Connector; 51. First fixing hole; 52. Second fixing hole; 53. Second channel; 54. Third channel; 55. Mounting surface; 56. Support; 6. Plug. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The common rail is a key component of the common rail fuel system used in engines; it is the common feed pipe used to supply fuel to the engine. See also Figures 1-3 This utility model provides a common rail pipe, including a pipe body 1. A mounting seat 2 for installing a fuel control valve (not shown) is integrally formed on the pipe body 1. The mounting seat 2 protrudes from the outer surface of the pipe body 1. The mounting seat 2 has a receiving cavity for accommodating the fuel control valve, which is connected to the pipe cavity 11 of the pipe body 1 through a first channel 12. The mounting seat 2 is provided with a mounting hole 21 for the fuel control valve to enter and exit the receiving cavity and a fuel outlet for transmitting fuel.

[0025] As is easily understood, when constructing a common rail fuel system using the common rail of this invention, the fuel control valve (e.g., fuel injection valve, hydrogen injection valve, etc.) is inserted into the receiving cavity of the mounting base 2 through the mounting hole 21 and fixed. The feed side of the fuel control valve is opposite to the first channel 12, and the discharge side of the fuel control valve is opposite to the fuel outlet. The fuel outlet is connected to the combustion chamber of the engine through, for example, a pipe. During operation, the fuel flow path is as follows: the fuel in the cavity 11 of the pipe body 1 reaches the fuel control valve through the first channel 12 and enters the interior of the fuel control valve. After exiting the fuel control valve, it is sprayed towards the fuel outlet, and then reaches the combustion chamber through, for example, a pipe connecting the fuel outlet and the combustion chamber of the engine.

[0026] Because the common rail pipe of this invention integrates the mounting seat 2 for the fuel control valve onto the pipe body 1, it simplifies the engine's common rail system to a certain extent. This makes both the assembly and subsequent maintenance of the common rail system much more convenient. Figure 1 As shown, in some embodiments, the number of mounting seats 2 integrated on the pipe body 1 of the common rail pipe can be two or more, such as four, five, or six. When there are two or more mounting seats 2 integrated on the pipe body 1 of the common rail pipe, all of these mounting seats 2 can be arranged on the same side of the pipe body 1, and the mounting holes 21 of each mounting seat 2 are arranged facing the same side of the pipe body 1. When there are more than two mounting seats 2, these mounting seats 2 can be configured to be evenly distributed along the length direction of the pipe body 1.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the common rail may include a connector 5 fixedly connected to the mounting base 2. The connector 5 is provided with a second channel 53 and a third channel 54 extending outward from the fuel outlet in different directions. The connector 5 has a mounting surface 55 for mounting and engaging with the engine. The ends of the second channel 53 and the third channel 54 furthest from the fuel outlet extend through the mounting surface 55. It should be understood that the outer surface of the engine block has a structure that fits against the mounting surface 55 of the common rail. During installation, the mounting surface 55 of the common rail is attached to the corresponding position on the outer surface of the engine and then fixed. The second channel 53 and the third channel 54 are respectively connected to two different (but leading to the same combustion chamber) channels inside the engine block. In some embodiments, in order to achieve a fixed connection between the common rail and the engine, the connector 5 may have a first fixing hole 51. The first fixing hole 51 is used to install fasteners (such as screws) to fix the common rail to the engine.

[0028] like Figure 1 and Figure 2 As shown, in some embodiments, the connector 5 can be configured to be integrally formed with the mounting base 2, and the connector 5 has a support portion 56 connected to the outer surface of the tube 1. That is, the connector 5, the mounting base 2, and the tube 1 are an integral structure. It should be noted that the aforementioned second channel 53 and third channel 54 are located in the portion of the connector 5 other than the support portion 56. This portion can be referred to as the other portion of the connector 5. The support portion 56 mainly serves to strengthen the connection between the other portion of the connector 5 and the tube 1. Therefore, the support portion 56 can be understood as a reinforcing rib between the other portion of the connector 5 and the tube 1. It is easy to understand that due to the presence of the support portion 56, a larger area of ​​connection is made between the connector 5 and the outer surface of the tube 1, so the connection between the connector 5 and the tube 1 is less prone to breakage. In addition, in Figure 2 In the exemplary embodiment, a portion of the aforementioned mounting surface 55 is located within the support portion 56. That is, the mounting surface 55 is formed jointly by a portion of the surface of the connector 5 and a portion of the support portion 56. Therefore, the presence of the support portion 56 allows the mounting surface 55 to have a relatively large area. Of course, in other embodiments, the mounting surface 55 may also be formed solely by a portion of the surface of the connector 5. For example, the side of the connector 5 facing the engine may be configured to protrude beyond the side of the support portion 56 facing the engine. That is, the sides of both the connector 5 and the support portion 56 facing the engine are no longer similar. Figure 2 As shown, the coplanarity condition is satisfied, and a portion of the connecting body 5 extends outward relative to the support part 56.

[0029] In some embodiments, the connector 5 may not be integrally formed with the mounting base 2. For example, the connector 5 can be manufactured separately and then welded to the mounting base 2. This invention does not limit this aspect. The overall shape and structure of the connector 5 can have various options, such as... Figure 1 and Figure 2 As shown, in some embodiments, the connector 5 can be configured such that the projection of the connector 5 along the target direction is triangular or V-shaped, and the target direction is perpendicular to the mounting surface 55, that is, the outer contour of the connector 5 is approximately triangular or V-shaped. See also Figure 3 The connector 5 branches off in a direction away from the mounting base 2, with one part having a second channel 53 and the other part having a third channel 54, thus forming a V-shape. For a more secure mounting to the engine, the connector 5 may include a second fixing hole 52 located at the V-shaped fork, serving the same function as the aforementioned first fixing hole 51. The second fixing hole 52 is used to install fasteners (e.g., screws) to secure the common rail to the engine. Due to the need for the second fixing hole 52, a portion of the connector 5 fills the fork between the portion containing the second channel 53 and the portion containing the third channel 54. In this structure, the projection of the connector 5 along a direction perpendicular to the mounting surface 55 is approximately triangular, as shown below. Figure 1 As shown.

[0030] See Figure 1 and Figure 3 In some embodiments, the end of the mounting base 2 located at the mounting hole 21 may be raised and provided with a flange 22 that mates with the fuel control valve. That is, a portion of the outer surface of the mounting base 2 protrudes radially from other nearby portions along the mounting hole 21 to form a flange structure. When installing the fuel control valve, after the body of the fuel control valve is inserted into the receiving cavity of the mounting base 2 through the mounting hole 21, a portion of the fuel control valve abuts against the flange 22 outside the mounting base 2. The portion of the fuel control valve exposed outside the mounting base 2 and the flange 22 are provided with corresponding fastener fixing holes for installing fasteners (e.g., screws) connecting the fuel control valve and the flange 22. Of course, in other embodiments, the fuel control valve can be fixedly connected to the mounting base 2 in other ways. For example, the inner wall of the mounting hole 21 of the mounting base 2 may be provided with a groove for engaging the fuel control valve, or with an internal thread for helical engagement with the fuel control valve. In this way, the fuel control valve is fixed to the mounting base 2 by snap-fit ​​or thread engagement.

[0031] See Figure 1 and Figure 2 In some embodiments, the outer surface of the pipe body 1 may be provided with a feed pipe connector 3 for connection to a pipeline. The feed pipe connector 3 can be located at any position between the two ends of the pipe body 1, and the present invention is not limited thereto. It should be understood that the pipeline connected to the feed pipe connector 3 is a pipeline for conveying fuel into the cavity 11 of the pipe body 1. In some embodiments, the feed pipe connector 3 can be configured as a connector body for implementing a compression fitting. In this structure, the feed pipe connector 3 is connected to the pipeline for conveying fuel to the cavity 11 by means of a compression fitting.

[0032] In some embodiments, at least one end of the tube 1 is sealed by a sensor 4 installed at that end. Figure 1 and Figure 2 In the exemplary embodiment, one end of the pipe body 1 is sealed by a sensor 4, and the other end is sealed by a plug 6. The sensor 4 serves the same function as the plug 6, sealing the pipe opening of the pipe body 1, and also detects parameters of the fuel within the pipe cavity 11 (e.g., pressure, temperature). The sensor 4 can be of various types; for example, it can be a temperature sensor, a pressure sensor, or a temperature-pressure sensor. It should be understood that a temperature-pressure sensor is a sensor capable of detecting both temperature and pressure. The connection between the sensor 4 and the pipe body 1 can be a screw connection. For example, the outer surface of the sensor 4 has external threads, and the pipe opening of the pipe body 1 has internal threads; the sensor 4 is screwed into the pipe body 1 and tightened for secure installation. Alternatively, the connection between the sensor 4 and the pipe body 1 can be a plug-in connection, where the sensor 4 is installed and removed via a plugging and unplugging operation. The plug 6 can be connected to the pipe body 1 in the same or different manner as the sensor 4; this invention does not limit this connection.

[0033] Based on the common rail provided by this utility model, this utility model also provides a fuel common rail system for engines, which may include the common rail described in any of the above embodiments. The structural form of the common rail can be referred to the preceding description of the common rail, and will not be repeated here. Since the common rail disclosed in the above embodiments has the aforementioned technical effects, the fuel common rail system having this common rail also has the aforementioned technical effects, and will not be repeated here. It should be noted that this utility model does not limit the type of engine to which the above fuel common rail system is applied; the engine can be a fuel oil engine or a gas combustion engine (e.g., a hydrogen internal combustion engine).

[0034] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A common rail pipe comprising a pipe body (1), characterized in that, The pipe body (1) is integrally formed with a mounting seat (2) for installing a fuel control valve. The mounting seat (2) protrudes from the outer surface of the pipe body (1). The mounting seat (2) has a receiving cavity for accommodating the fuel control valve, which is connected to the lumen (11) of the pipe body (1) through a first channel (12). The mounting seat (2) is provided with a mounting hole (21) for the fuel control valve to enter and exit the receiving cavity and a fuel outlet for transmitting fuel.

2. The common rail tube according to claim 1, characterized in that, The device includes a connector (5) fixedly connected to the mounting base (2), the connector (5) having a second channel (53) and a third channel (54) extending outward from the fuel outlet in different directions, the connector (5) having a mounting surface (55) for mounting and engaging with the engine, and the ends of the second channel (53) and the third channel (54) that are away from the fuel outlet extending into the mounting surface (55).

3. The common rail pipe according to claim 2, characterized in that, The connector (5) is integrally formed with the mounting base (2), and the connector (5) has a support portion (56) connected to the outer surface of the tube (1).

4. The common rail tube of claim 2, wherein, The projection of the connector (5) along the target direction is triangular or V-shaped, and the target direction is perpendicular to the mounting surface (55).

5. The common rail tube of claim 1, wherein, The mounting base (2) is raised at the end where the mounting hole (21) is located and is provided with a flange (22) that cooperates with the fuel control valve.

6. The common rail tube of claim 1, wherein The outer surface of the tube body (1) is provided with a feed pipe connector (3) for connecting to the pipeline.

7. The common rail tube of claim 6, wherein, The feed pipe connector (3) is configured as a connector body for realizing a ferrule connector.

8. The common rail pipe according to any one of claims 1 to 7, characterized in that The opening at at least one end of the tube (1) is sealed by a sensor (4) installed at the opening.

9. The common rail tube of claim 8, wherein, The sensor (4) is configured as a temperature sensor, a pressure sensor, or a temperature-pressure sensor.

10. A common rail fuel system for an engine characterised in that, Includes the common rail as described in any one of claims 1 to 9.

Images