CN204553037U - A kind of constant volume bullet oil sprayer gondola and fixed mechanism thereof - Google Patents

Abstract

The utility model relates to a fuel injector pod for constant volume bombs and its fixing mechanism, comprising an adapter (1) and a fuel injector (4), and is characterized in that it also includes a fuel injector pod (2), a pod The pressure plate (3) and the support rod (5), the end of the injector (4) with the O-ring is pressed into the lower part of the injector pod (2), and the assembled injector pod (2) and the fuel injector (4) are assembled in the cavity of the adapter (1); the pod pressure plate (3) is pressed against the pressure surface (26) of the lower part of the fuel injector pod (2), and the support rod (5) Set between the injector installation plane (14) at the bottom of the adapter (1) cavity and the pod pressure plate (3) to ensure that the O-ring of the injector (4) enters the inner length of the injector pod (2). Excellent; the pod interface (21) on the upper end of the injector pod (2) is tightly connected to the high-pressure oil pipe. The utility model has the advantages of simple structure, low processing cost and good sealing effect.

Description

A fuel injector pod for constant volume bombs and its fixing mechanism

technical field

The utility model belongs to the technical field of automobile engine fuel injector spraying, in particular to a fuel injector pod for constant volume bombs and a fixing mechanism thereof.

Background technique

The spray characteristics of the engine injector is one of the important factors affecting the performance of the engine. For high-pressure direct injection engines, the spray characteristics of the injector have a great influence on the combustion and emission performance of the engine. The test of the spray characteristics of the device is particularly important in the design and development of the engine combustion system.

At present, various colleges, steam research institutes, and OEMs mostly use constant-volume bomb equipment for the research on the spray characteristics of fuel injectors. The constant-volume bombs currently designed are mostly used for the research and analysis of the spray characteristics of fuel injectors for in-cylinder direct-injection gasoline engines. Therefore, the fuel injection pressure of the entire fuel injection system is much higher than that of the traditional intake port injection, and the current range is 40-200bar or even higher, so the sealing requirements for the entire fuel supply pipeline are more stringent. Strictly speaking, the current oil supply system of the direct injection gasoline engine in the cylinder is to pump oil through the high-pressure oil pump, enter the oil rail through the high-pressure oil pipe, and then distribute it to each injector through the oil rail. It is connected with the fuel rail assembly, and the fuel injector is compressed by compressing the fuel rail, but this method is not suitable for the fuel supply and compression of a single fuel injector, let alone the fuel supply system of constant volume bombs, so consider Due to the particularity of constant volume bomb equipment, it is necessary to optimize the pod of the injector. Invention patents CN201010272629.3 "A Constant Volume Projectile for Spray Testing" and CN201310717167.5 "A Multifunctional Constant Volume Projectile for Testing the Characteristics of Spray, Combustion and Soot Generation" have not clearly addressed this issue.

Contents of the invention

The utility model designs a fuel injector pod for constant volume bombs and its fixing mechanism, which solves how to provide a simple and convenient fuel injector pod with good sealing effect, easy installation and disassembly for constant volume bombs The device and its fixing mechanism are used to effectively solve the problems caused by the fuel supply system and fuel rail of conventional in-cylinder direct injection gasoline engines due to the characteristics of constant volume bombs (generally only used for single injector tests) and the limitations of injector installation adapters. The problem of inability to install, as well as problems such as sealing and pressing after installation and joint connection.

In order to solve the above-mentioned technical problems, the utility model adopts the following scheme:

A fuel injector pod for constant volume bombs and its fixing mechanism, including an adapter (1) and a fuel injector (4), characterized in that it also includes a fuel injector pod (2), a pod pressure plate (3) and the support rod (5), the end of the injector (4) with the O-ring is pressed into the lower part of the injector pod (2), and the assembled injector pod (2) and the injector (4) Assembled in the cavity of the adapter (1); the pod pressure plate (3) is pressed against the pressure surface (26) of the lower part of the injector pod (2), and the support rod (5) is set on the adapter ( 1) The distance between the injector installation plane (14) at the bottom of the cavity and the pod pressure plate (3) is optimal to ensure that the O-ring of the injector (4) enters the inner length of the injector pod (2); The pod interface (21) on the upper end of the pod pod (2) is sealed with the high-pressure oil pipe.

Further, the upper end of the injector pod (2) is provided with a pod interface (21), and the inner cavity of the injector pod (2) is longer than the injector (4) allowed to enter the injector pod (2) The length of the injector pod (2) is provided with a guide surface (25) at the entrance of the lower end to facilitate the introduction of the O-ring of the injector (4); the lower end of the injector pod (2) is provided with a pull edge structure, the upper surface of the pull-edge structure is the pressing surface (26) that cooperates with the pod pressure plate (3), and the side wall of the injector pod (2) is also equipped with a The fuel injector escape opening (24) of the parts and the fuel injector positioning hole (22) for the positioning of the fuel injector (4).

Further, the pod interface (21) is processed with an external thread structure; the lower part of the pod interface (21) is also provided with a tapered surface on the connection surface of the high-pressure oil pipe to ensure internal matching with the high-pressure oil pipe joint.

Further, the installation guide surface (25) is a trumpet-shaped structure with a large mouth downward.

Further, the pod pressure plate (3) is a disc-shaped structure, and a pod installation hole (33) is opened in the center of the pod pressure plate (3), and a gap is also processed on the pod pressure plate (3) to form an escape groove ( 31) It is used to avoid the fuel injector wiring terminal and the fuel injector connector, the avoidance groove (31) and the pod installation hole (33) are connected; the pod pressure plate (3) is also provided with a fixing hole (32).

Furthermore, the support rod (5) is a hollow tube structure; the support rod (5) is set between the injector installation plane (14) at the bottom of the adapter (1) and the pod pressure plate (3), and the compression bolts pass through the pod in turn The fixing hole (32) and the support rod (5) on the cabin pressure plate (3) are screwed to the corresponding injector installation positioning hole (13) on the adapter (1).

Further, there are two support rods (5); the length of the support rods (5) is set to ensure that the O-ring of the injector (4) enters the inner length of the injector pod (2) at an optimal length to ensure that it will not be sprayed The internal structure of the oiler pod (2) is damaged O-ring.

Further, the adapter (1) is a cavity container structure with an opening upward, and the upper end of the adapter (1) is provided with a pull-side structure, and the upper end surface of the pull-side structure is evenly distributed with adapter mounting holes (11), and the space of the adapter (1) The fuel injector mounting plane (14) at the bottom of the cavity is processed with fuel injector mounting holes, and the surroundings of the fuel injector mounting holes are evenly distributed with fuel injector mounting positioning holes (13).

Further, the junction between the upper end surface of the adapter (1) and the side wall of the adapter (1) is processed into a bevel (12).

Further, there are 6 adapter mounting holes (11); 4 fuel injector mounting positioning holes (13), and 4 fuel injector mounting positioning holes (13) are opposite in pairs.

The fuel injector pod for constant volume bombs and its fixing mechanism have the following beneficial effects:

(1) This utility model solves how to provide a simple and convenient fuel injector pod device and its fixing mechanism with good sealing effect, easy installation and disassembly for the constant volume bomb, so as to effectively solve the problem due to the characteristics of the constant volume bomb (generally It is only used for single injector test), and the limitations of the injector installation adapter, which lead to the problem that the fuel supply system and fuel rail of the conventional in-cylinder direct injection gasoline engine cannot be installed, as well as the sealing and compression after installation and the joint connection.

(2) The utility model has simple structure and low processing cost.

(3) In this utility model, the fuel injector pod is a mechanism used to connect with the fuel inlet end of the fuel injector, mainly responsible for storing high-pressure fuel and supplying the fuel injector, and the pod interface at the upper end of the fuel injector pod The external thread structure and tapered surface structure ensure strong sealing characteristics and ensure that fuel will not leak.

(4) In this utility model, the pod pressure plate and the support rod are mainly used to control the depth of the connection between the injector pod and the injector, so as to avoid damage to the seal ring of the injector due to excessive extrusion and oil leakage .

(5) In this utility model, on the installation plane of the injector of the adapter, four injector installation positioning holes are evenly arranged around the installation hole of the injector, which are used to install the compression bolts. The arrangement of the four threaded holes They are opposite to each other, and according to the different oil jet collection positions, the installation angle of the injector can be rotated 90 degrees without moving the camera, so that the spray characteristics of different oil jet planes can be easily collected.

Description of drawings

Figure 1: Schematic diagram of the assembly structure (sectional view) of the fuel injector pod and its fixing mechanism for constant volume bombs of the present invention;

Figure 2: Schematic diagram of the assembly structure of the fuel injector pod and its fixing mechanism for constant volume bombs of the present invention (top view);

Figure 3: The front view of the fuel injector pod in the utility model;

Figure 4: The left view of the injector pod in the utility model;

Figure 5: The top view of the fuel injector pod in the utility model;

Fig. 6: the front view of the pod pressure plate in the utility model;

Figure 7: The front view of the supporting column in the utility model.

Explanation of reference signs:

1—adapter; 11—adapter mounting hole; 12—slope; 13—injector installation positioning hole; 14—injector installation plane; 2—injector pod; 21—pod interface; 22—injector Positioning hole slot; 23—clamping plane; 24—injector avoidance opening; 25—installation guide surface; 26—pressing surface; 3—pod pressure plate; 31—avoidance groove; Mounting hole; 4—injector; 5—support rod.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described further:

Figures 1 to 7 show a fuel injector pod for constant volume bombs and its fixing mechanism, including an adapter 1, a fuel injector pod 2, a pod pressure plate 3, a fuel injector 4, and a support rod 5. The end of the oil injector 4 with the O-ring is pressed into the lower part of the injector pod 2, and the assembled injector pod 2 and injector 4 assembly is installed in the cavity of the adapter 1, and the pod The pressure plate 3 is pressed against the pressure surface 26 provided on the injector pod, and the support rod 5 is supported between the adapter 1 injector installation plane 14 and the pod pressure plate 3 to ensure that the O-ring of the injector 4 The inner length of the fuel injector pod 2 is optimal, and the pod interface 21 at the upper end of the fuel injector pod 2 is connected with the high-pressure oil pipe. There are two support rods 5 in this embodiment, and they are arranged symmetrically.

The structure of the adapter 1 is a cavity container with an opening upward, as shown in Figure 1 and Figure 2, the upper end surface of the upper end of the adapter 1 is evenly distributed with adapter mounting holes 11, and the upper end surface of the adapter 1 and the upper end of the edge structure are connected to the adapter. The junction of the side walls of 1 is processed into a slope 12, and the injector installation plane 14 at the bottom of the cavity of the adapter 1 is processed with injector installation holes, and 4 injector installation positioning holes are uniformly arranged around the injector installation holes 13.

The upper end of the injector pod 2 is provided with a pod interface 21. In this embodiment, the pod interface 21 is processed with an external thread structure. The entrance of the lower end of the injector pod 2 is provided with an installation guide surface 25 to facilitate the introduction of the O-ring of the injector 4. The installation guide surface 25 is a trumpet-shaped structure with a large opening downward. The chamber length is greater than the length that the fuel injector 4 allows to enter the pod. The lower end of the fuel injector pod 2 is also provided with a pull-side structure, and the upper surface of the pull-side structure is a pressing surface 26 that cooperates with the pod pressure plate 3. In addition, the fuel injector pod 2 is also equipped with a 4 The fuel injector escape opening 24 of the connector and the fuel injector positioning hole 22 for positioning the fuel injector 4, so as to ensure that the relative position of the fuel injector 4 and the fuel injector pod 2 is fixed, which is convenient for subsequent injection. The overall rotation and movement of the oiler 4.

The structure of the pod pressure plate 3 is shown in Figure 6, the pod pressure plate 3 is a disc-shaped structure, a pod installation hole 33 is opened in the center of the pod pressure plate 3, and a gap is also processed on the pod pressure plate 3 to form an escape The groove 31 is used to avoid the fuel injector connection terminal and the fuel injector connector, and the avoidance groove 31 and the pod mounting hole 33 are connected. Two fixing holes 32 are symmetrically arranged on the pod pressure plate 3 .

The structure of the support rod 5 is shown in Figure 7, which is a hollow tube structure, and the hollow part is used for the compression bolt to pass through. The support rod 5 is arranged between the injector installation plane 14 of the adapter 1 and the pod pressure plate 3 , and the compression bolts pass through the fixing holes 32 and the support rod 5 in sequence and are tightened to the corresponding injector installation positioning holes 13 on the adapter 1 . The length of the support rod 5 is set to ensure that the O-ring of the injector 4 enters the inner length of the injector pod 2 at an optimal length, so as to ensure that the O-ring is not damaged by the internal structure of the injector pod 2 .

Firstly, install the adapter 1 to the corresponding end face of the volume bomb through the adapter mounting hole 11 and the mounting bolts, and tighten the mounting bolts.

Secondly, press the end of the fuel injector 4 with the O-ring into the fuel injector pod 2, and the end face of the fuel injector pod 2 matching the fuel injector is provided with a mounting guide surface 25, which is convenient for the fuel injector to The introduction of the O-ring of 4, while the length of the inner cavity of the injector pod 2 is greater than the length that the injector is allowed to enter the pod. In addition, the fuel injector pod 2 is also provided with a fuel injector avoidance opening 24 for avoiding the fuel injector connector and a fuel injector positioning hole 22 for positioning the fuel injector 4, so as to ensure that the fuel injector 4. The relative position of the fuel injector pod 2 is fixed, which is convenient for the overall rotation and movement of the subsequent fuel injector 4. Press the O-ring of the fuel injector 4 into the pod 3-5mm through the installation guide surface 25 by hand. , the preliminary connection between the injector 4 and the injector pod 2 is completed above.

Again, put the installed injector 4 and injector pod 2 assembly into the corresponding injector installation hole on the adapter 1, select the direction to observe the position of the oil beam, and select the injector on the adapter 1 Install the two counterpoints in the positioning hole 13, install the pod pressure plate 3 and the support rod 5 in place according to the positions shown in Figure 1 and Figure 2, and press the pod pressure plate 3 to the injector pod. On the pressing surface 26 of the pod, the effect of the pod pressure plate 3 is guaranteed to be the best. The pod pressure plate 3 is provided with an avoidance groove 31 for the fuel injector terminal, which is used to avoid the fuel injector connector. The length setting of the support rod 5 is used to ensure the optimal length of the injector O-ring entering the pod to ensure that the O-ring will not be damaged by the internal structure of the pod. The second pass through the pod pressure plate 3 and the support rod 5 and screw it to the injector installation positioning hole 13 corresponding to the injector adapter.

Finally, connect the nose of the high-pressure fuel pipe to the fuel injector pod 2. The fuel injector pod 2 is provided with a pod interface 21 for connecting with the high-pressure fuel pipe. Internally matched to prevent oil leakage, the injector pod 2 is also provided with a corresponding clamping plane 23 for tool clamping, which is used for tool clamping to tighten the high-pressure fuel pipe joint bolts.

In the utility model, four injector installation positioning holes 13 are evenly arranged around the installation hole of the injector 4 on the adapter 1 injector installation plane 14, which are used to install the pressure plate bolts, and the injector installation positioning holes 13 are Threaded holes, these 4 threaded holes are arranged in pairs, which are used to rotate the installation angle of the injector by 90 degrees without moving the camera according to the different positions of the oil beam collection, so that different oils can be easily collected The spray characteristics of the beam plane.

Through the above steps, the entire process of pipeline connection, injector pod 2, injector 1 matching, pressing and installation is completed. This structure is simple and convenient, and has low requirements for space layout, and the connection end has better Sealing effect, in terms of the protection of the injector 4 being pressed into the injector pod 2, the depth of the injector can be controlled by the length of the support rod 5 to prevent the O-ring from being damaged by pressure. This set of mechanism can be more Easily change the position of the oil beam to facilitate subsequent data analysis.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the realization of the utility model is not limited by the above-mentioned method, as long as various improvements of the method concept and technical solutions of the utility model are adopted, or the utility model is not improved. Directly applying the conception and technical solutions of the utility model to other occasions is within the protection scope of the utility model.

Claims (10)

1. a constant volume bullet oil sprayer gondola and fixed mechanism thereof, comprise ABAP Adapter (1) and oil sprayer (4), it is characterized in that: also comprise oil sprayer gondola (2), gondola pressing plate (3) and strut (5), oil sprayer (4) is pressed into oil sprayer gondola (2) interior bottom with one end of O type circle, and the oil sprayer gondola (2) be assembled together and oil sprayer (4) general assembly are in the cavity of ABAP Adapter (1); Gondola pressing plate (3) is pressed on the seal face (26) of oil sprayer gondola (2) bottom, and strut (5) is arranged between ABAP Adapter (1) cavity bottom oil sprayer mounting plane (14) and gondola pressing plate (3) to ensure that the O type circle of oil sprayer (4) enters oil sprayer gondola (2) inner length optimum; The gondola interface (21) of oil sprayer gondola (2) upper end and high-pressure oil pipe are tightly connected.

2. constant volume bullet oil sprayer gondola according to claim 1 and fixed mechanism thereof, it is characterized in that: oil sprayer gondola (2) upper end is provided with gondola interface (21), oil sprayer gondola (2) cavity length is greater than the length allowing the oil sprayer (4) entered in oil sprayer gondola (2), and oil sprayer gondola (2) lower inlet place is provided with installs guide surface (25) so that the importing of O type circle of oil sprayer (4); Oil sprayer gondola (2) lower end is provided with draws limit structure, the upper surface drawing limit structure is the seal face (26) with gondola pressing plate (3) cooperating, the oil sprayer positioning hole groove (22) that on oil sprayer gondola (2) sidewall, the oil sprayer be also provided with for dodging oil sprayer (4) plug connector is dodged opening (24) and located for oil sprayer (4).

3. constant volume bullet oil sprayer gondola according to claim 1 and 2 and fixed mechanism thereof, is characterized in that: gondola interface (21) is processed with external thread structure; The junction surface of gondola interface (21) bottom and high-pressure oil pipe is also provided with the conical surface, to ensure and high-pressure oil pipe joint matching internal.

4. constant volume bullet oil sprayer gondola according to claim 3 and fixed mechanism thereof, is characterized in that: installing guide surface (25) is downward flared structure at a gulp.

5. constant volume bullet oil sprayer gondola according to claim 1 and fixed mechanism thereof; it is characterized in that: gondola pressing plate (3) is a disc-shaped structure; gondola mounting hole (33) is had in the central authorities of gondola pressing plate (3); gondola pressing plate (3) is also processed with one breach formed escape groove (31) for dodging oil sprayer tenminal block and oil sprayer plug connector, escape groove (31) and gondola mounting hole (33) through; Gondola pressing plate (3) is also provided with fixed hole (32).

6. constant volume bullet oil sprayer gondola and fixed mechanism thereof according to claim 1 or 5, is characterized in that: strut (5) is tubular structure; Between the oil sprayer mounting plane (14) that strut (5) is arranged on ABAP Adapter (1) bottom and gondola pressing plate (3), hold-down bolt is tightened to upper corresponding oil sprayer mounting-positioning holes (13) place of ABAP Adapter (1) through the fixed hole (32) on gondola pressing plate (3) and strut (5) successively.

7. constant volume bullet oil sprayer gondola according to claim 6 and fixed mechanism thereof, is characterized in that: strut (5) has two; The length of strut (5) is arranged for ensureing that the O type circle of oil sprayer (4) enters oil sprayer gondola (2) inner length optimum, ensures not damaged O type circle by oil sprayer gondola (2) internal structure.

8. constant volume bullet oil sprayer gondola according to claim 1 and fixed mechanism thereof, it is characterized in that: ABAP Adapter (1) is the cavity structure of container of an opening upwards, ABAP Adapter (1) upper end is provided with draws limit structure, the upper-end surface of drawing limit structure is evenly equipped with ABAP Adapter mounting hole (11), the cavity bottom oil sprayer mounting plane (14) of ABAP Adapter (1) is processed with mounting hole of oil sprayer, and the surrounding of mounting hole of oil sprayer is evenly equipped with oil sprayer mounting-positioning holes (13).

9. constant volume bullet oil sprayer gondola according to claim 8 and fixed mechanism thereof, is characterized in that: the sidewall intersection of upper-end surface and ABAP Adapter (1) that ABAP Adapter (1) draws limit structure is processed into inclined-plane (12).

10. constant volume bullet oil sprayer gondola and fixed mechanism thereof according to claim 8 or claim 9, is characterized in that: ABAP Adapter mounting hole (11) has 6; Oil sprayer mounting-positioning holes (13) has 4, and 4 oil sprayer mounting-positioning holes (13) are relative between two.