CN113062821A

CN113062821A - Fuel oil suction structure and automobile

Info

Publication number: CN113062821A
Application number: CN202110336860.2A
Authority: CN
Inventors: 陈景林; 卓义盛; 潘宇飞; 许家毅; 林振贤; 朱永刚; 陆方伟
Original assignee: Dongfeng Liuzhou Motor Co Ltd
Current assignee: Dongfeng Liuzhou Motor Co Ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-07-02
Anticipated expiration: 2041-03-29
Also published as: CN113062821B

Abstract

The invention relates to the technical field of automobile machinery, and discloses a fuel oil suction structure and an automobile. The oil tank is provided with a cavity; a downward concave groove is formed in the bottom side of the cavity; the oil suction pipe is vertically arranged in the groove, and the bottom side of the oil suction pipe is connected to the bottom side of the cavity; a first oil conveying channel is formed in the oil suction pipe and extends along the axial direction of the oil suction pipe; the upper part of the oil suction pipe is provided with a plurality of oil suction holes communicated with the oil conveying pipeline; and a layer of filter screen is arranged on the periphery of the oil suction hole. The fuel oil absorption structure and the automobile provided by the invention can improve the volume utilization rate of the oil tank and greatly reduce the production cost of the whole automobile.

Description

Fuel oil suction structure and automobile

Technical Field

The invention relates to the technical field of automobile machinery, in particular to a fuel oil absorption structure and an automobile.

Background

An oil suction device is arranged in the diesel oil fuel tank of the current commercial vehicle. In order to prevent the oil suction pipe from sucking impurities deposited at the bottom of the oil tank, a clearance of 10 mm-15 mm is reserved between the bottom side of the oil suction pipe and the bottom side of the inner wall of the oil tank. This construction results in a certain redundant unusable volume in the bottom of the tank, where the fuel cannot be sucked in by the suction pipe. The greater the cross-sectional area, the greater the redundant volume, with longer tank lengths. Taking a 600-liter oil tank which is mainly used in the market at present as an example, the unavailable volume at the bottom reaches about 43 liters. The volume of the fuel tank of the current commercial vehicle tends to increase continuously, and the fuel tank configuration of 800-1000 liters is increased gradually. Therefore, an improved oil suction structure is needed to improve the volume utilization rate of the oil tank.

Disclosure of Invention

The purpose of the invention is: the utility model provides a fuel oil suction structure and car, its volume utilization that can improve the oil tank reduces whole car manufacturing cost by a wide margin.

In order to achieve the above object, the present invention provides a fuel oil suction structure, including:

an oil tank; the oil tank is provided with a cavity; a downward concave groove is formed in the bottom side of the cavity; and

an oil suction pipe; the oil suction pipe is vertically arranged in the groove, and the bottom side of the oil suction pipe is connected to the bottom side of the cavity; a first oil conveying channel is formed in the oil suction pipe and extends along the axial direction of the oil suction pipe; the upper part of the oil suction pipe is provided with a plurality of oil suction holes communicated with the oil conveying pipeline; and a layer of filter screen is arranged on the periphery of the oil suction hole.

Optionally, the height of the filter mesh at the bottommost side of the filter screen is higher than the height of the bottom side of the cavity.

Optionally, the method further comprises:

an oil passing bolt; the oil passing bolt is connected to the bottom end of the oil suction pipe; the oil passing bolt vertically penetrates through and is connected to the bottom of the oil tank; the oil suction pipe is connected with the oil tank through the oil passing bolt; the oil passing bolt is provided with a second oil conveying channel communicated with the first oil conveying channel along the axial direction of the oil passing bolt; the periphery of the lower part of the oil passing bolt is provided with an oil outlet communicated with the second oil conveying channel; the oil outlet is located below the oil tank.

Optionally, the filter screen is sleeved on the periphery of the upper part of the oil suction pipe, and the bottom side of the filter screen is connected with the top side of the oil passing bolt.

Optionally, the method further comprises:

a plug screw seat body; the plug screw base body is vertically arranged on the outer side of the oil tank and is plugged at the bottom of the groove; the screw plug seat body is provided with a mounting hole along the vertical direction; the upper part of the oil passing bolt is screwed in the mounting hole.

Optionally, the method further comprises:

a fuel pipe joint; the fuel pipe joint is connected to the bottom side of the screw plug base body, the oil passing bolt is connected with the fuel pipe joint, and the fuel pipe joint is communicated with the oil outlet; and

a connecting pipe; the connecting pipe is provided with a first end and a second end used for connecting an external engine; the first end part is provided with a mounting part, and the fuel pipe joint is mounted in the mounting part; the mounting part is provided with a connecting hole communicated with the fuel pipe joint; and a third oil delivery channel is arranged in the connecting pipe along the axis of the connecting pipe, and is respectively communicated with the connecting hole and the second end part.

Optionally, the method further comprises:

a barrel; the cylinder is vertically arranged in the cavity, and the bottom side of the cylinder is connected with the bottom side of the cavity; the cylinder body is arranged around the periphery of the oil suction pipe; the bottom of the cylinder body is provided with two communicating holes; on the horizontal plane, the connecting direction of the two communicating holes is inclined with the advancing direction of the automobile.

Alternatively, on a horizontal plane, when an inclination angle between a connecting line of the two communicating holes and the advancing direction of the automobile is defined as alpha, the inclination angle is more than or equal to 55 degrees and less than or equal to 65 degrees.

Optionally, the open area of the communication hole is 2 to 2.5 times the cross-sectional area of the first oil delivery passage.

In order to solve the same technical problem, the invention further provides an automobile which comprises an engine and the fuel oil suction structure according to any one of the technical schemes, wherein the engine is communicated with the first fuel delivery passage of the fuel oil suction structure.

Compared with the prior art, the fuel oil absorption structure and the automobile provided by the invention have the beneficial effects that: the bottom side of the oil tank cavity is provided with a downward concave groove, and the groove can deposit particle impurities mixed in fuel oil. The oil suction pipe is vertically arranged in the groove, and a filter screen is arranged outside an oil suction hole on the oil suction pipe and can filter particle impurities in the fuel oil. The bottom side of the oil suction pipe is connected with the inner wall of the cavity, so that an oil suction hole in the oil suction pipe can adsorb fuel oil with a lower oil level, the unavailable volume at the bottom of the oil tank is reduced, and the actual volume utilization rate of the diesel fuel tank is improved. The invention has simple and reliable structure and low cost, and can ensure that the vehicle can be normally used under the condition of lower fuel liquid level. When the automobile using the fuel oil absorption structure is produced and debugged, the debugging requirement can be met only by a small amount of fuel oil, and the production and debugging cost of the automobile is low.

Drawings

Fig. 1 is a bottom view of a fuel suction structure of an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view at B in FIG. 2;

fig. 4 is a perspective view of a fuel suction structure (with a fuel tank removed) of an embodiment of the present invention;

FIG. 5 is a perspective view of the oil suction pipe, the oil passing bolt and the screw plug base according to the embodiment of the present invention;

FIG. 6 is a side view of the oil suction pipe, the oil passing bolt and the screw plug base according to the embodiment of the present invention;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6;

FIG. 8 is a perspective view of an oil suction pipe and an oil passing bolt according to an embodiment of the present invention;

FIG. 9 is a perspective view of a connecting tube of an embodiment of the present invention;

fig. 10 is a perspective view of a cartridge of an embodiment of the present invention.

In the figure, 1, a fuel tank; 2. a cavity; 3. a groove; 4. an oil suction pipe; 5. a first oil delivery passage; 6. an oil suction hole; 7. a filter screen; 8. an oil passing bolt; 9. a second oil delivery passage; 10. an oil outlet hole; 11. a plug screw seat body; 12. a fuel pipe joint; 13. a connecting pipe; 14. an installation part; 15. connecting holes; 16. a third oil delivery passage; 17. a barrel; 18. and a communicating hole.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms used in the present invention are used in the description of the present invention, and it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "vertical", "top", "bottom", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

It should be understood that the terms "first", "second", "third", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 10, a fuel suction structure according to a preferred embodiment of the present invention includes a fuel tank 1 and a suction pipe 4. The fuel tank 1 has a cavity 2 for containing fuel. The bottom side of the cavity 2 is provided with a groove 3 which is concave downwards. The grooves 3 are used for depositing particle impurities in the chamber 2. The oil suction pipe 4 is vertically arranged in the groove 3 in the cavity 2, and the bottom side of the oil suction pipe 4 is connected with the bottom side of the cavity 2. As shown in fig. 7, a first oil delivery passage 5 penetrates through the oil suction pipe 4, and the first oil delivery passage 5 extends in the axial direction of the oil suction pipe 4. The first oil delivery passage 5 is used for connecting an automobile engine. The upper part of the oil suction pipe 4 is provided with a plurality of oil suction holes 6 communicated with the oil pipeline. As shown in fig. 3, a layer of filter screen 7 is arranged on the periphery of the oil suction hole 6.

Based on above-mentioned technical scheme, utilize the characteristics of recess 3 undercut, the deposit mixes particulate matter impurity in the fuel. The oil suction pipe 4 is provided with a plurality of oil suction holes 6, and the oil suction holes 6 are uniformly distributed at the upper part of the oil suction pipe 4. The oil suction hole 6 can adsorb the fuel oil in the cavity 2, and the fuel oil enters the first oil delivery channel 5 from the oil suction hole 6. The filter screen 7 is arranged outside the oil suction hole 6 and is used for preventing particle impurities from entering the oil suction hole 6. The oil suction pipe 4 provided with the filter screen 7 is vertically arranged in the groove 3 at the bottom of the cavity 2, so that fuel oil at the bottom of the oil tank 1 can be used up as far as possible under the condition that an engine is prevented from sucking impurity particles at the bottom of the oil tank 1, and the volume utilization rate of the oil tank 1 is improved.

Wherein, the filter screen 7 is provided with a plurality of filter meshes. The height of the filter mesh positioned at the bottommost side of the filter screen 7 is higher than that of the bottom side of the cavity 2, so that the oil suction pipe 4 is prevented from sucking impurities deposited at the bottom of the oil tank 1, and the fuel oil at the bottom of the oil tank 1 is used up to the maximum extent.

Specifically, as shown in fig. 3 to 8, the fuel suction structure further includes an oil passing bolt 8. The oil passing bolt 8 is vertically arranged below the groove 3. The oil passing bolt 8 vertically penetrates through the bottom of the oil tank 1, and the upper part of the oil passing bolt 8 is connected to the bottom of the outer side of the oil tank 1. The top end of the oil passing bolt 8 is connected with the bottom end of the oil suction pipe 4. The oil suction pipe 4 is connected with the oil tank 1 through an oil passing bolt 8. As shown in fig. 7, the oil feed bolt 8 is provided with a second oil feed passage 9 communicating with the first oil feed passage 5 in the axial direction thereof. As shown in fig. 3 and 8, the lower part of the oil passing bolt 8 penetrates out of the oil tank 1, and the outer periphery of the oil passing bolt 8 is provided with an oil outlet 10 communicated with the second oil delivery channel 9; the oil outlet hole 10 is located below the oil tank 1. The oil passing bolt 8 has two functions: firstly, the oil suction pipe 4 is connected to the bottom side of the oil tank 1 by arranging an oil passing bolt 8; second, through being equipped with the second oil delivery passageway 9 that is connected with first oil delivery passageway 5 on the bolt 8 of crossing oil, through set up the oil outlet 10 that communicates with second oil delivery passageway 9 in the periphery of the bolt 8 of crossing oil, make the fuel can be along cavity 2-oil absorption hole 6-first oil delivery passageway 5-second oil delivery passageway 9-the route of oil outlet 10 is transported outside the oil tank 1 from the oil tank 1 in, realize the transport of fuel. Wherein the first oil delivery passage 5 is connected to the engine through the second oil delivery passage 9.

Because the oil suction pipe 4 is externally provided with a plurality of oil suction holes 6, if the oil suction holes 6 are provided with the filter screens 7 one by one, the process is complicated. The oil suction pipe 4 is cylindrical, and the filter screen 7 is circular for easy installation. As shown in fig. 3, the filter screen 7 is sleeved on the upper periphery of the oil suction pipe 4, and the bottom side of the filter screen 7 is connected with the top side of the oil passing bolt 8. In this embodiment, the bottom side of the filter screen 7 is fixed to the top side of the oil passing bolt 8 by welding. Because the filter screen 7 and the oil suction pipe 4 are fixedly connected with the oil passing bolt 8, the positions of the filter screen 7 and the oil suction pipe 4 are relatively fixed, and the filter screen 7 is favorable for blocking particle impurities.

More specifically, the fuel oil suction structure further comprises a plug screw seat body 11. The screw plug seat body 11 is vertically arranged on the outer side of the oil tank 1 and is plugged at the bottom of the groove 3. The screw plug base body 11 is used for plugging the cavity 2, and fuel oil leakage is avoided. The screw plug seat body 11 is provided with a mounting hole along the vertical direction; the upper part of the oil passing bolt 8 is screwed in the mounting hole. The oil passing bolt 8 is installed on the oil tank 1 through a screw plug base body 11. Because the oil passing bolt 8 and the plug screw seat body 11 are in threaded connection, and the filter screen 7 is fixed on the oil passing bolt 8, when maintenance is needed, the oil passing bolt 8 can be screwed, and the oil passing bolt 8 and the filter screen 7 are detached from the plug screw seat body 11, so that the filter screen 7 is cleaned and maintained, and the filter screen 7 can be reused.

In addition, the fuel suction structure further comprises a fuel pipe joint 12 and a connecting pipe 13. The fuel pipe joint 12 is attached to the bottom side of the plug screw housing 11. The fuel pipe joint 12 is provided with a limiting hole along the vertical direction, the oil passing bolt 8 penetrates through the limiting hole, and the middle part of the oil passing bolt 8 is connected with the fuel pipe joint 12. The fuel pipe joint 12 communicates with the oil outlet hole 10. The connection pipe 13 has a first end and a second end for connecting an external engine. The first end is provided with a mounting portion 14. The fuel pipe joint 12 is installed in the installation portion 14. As shown in fig. 9, the mounting portion 14 is provided with a connection hole 15 communicating with the fuel pipe joint 12. The connection hole 15 communicates with the oil outlet hole 10 through the fuel pipe joint 12. As shown in fig. 3, a third oil delivery passage 16 is provided in the connecting pipe 13 along the axis thereof, and the third oil delivery passage 16 communicates with the connecting hole 15 and the second end portion, respectively. The mounting portion 14 in this embodiment is of an annular structure, and the connection hole 15 is provided on the side of the mounting portion 14 close to the third oil delivery passage 16. The mounting portion 14 is sleeved outside the fuel joint. The fuel connector is used for connecting the connecting pipe 13 and the fuel passing bolt 8. The connecting pipe 13 is used for guiding fuel from the fuel tank 1 to the engine. In this embodiment, the top side of the mounting portion 14 abuts against the bottom side of the plug screw housing 11.

When the amount of fuel in the fuel tank 1 is too small, the fuel level in the fuel tank 1 greatly fluctuates during vehicle traveling, and the oil suction hole 6 is likely to be exposed from the liquid level, and air is likely to be sucked in, thereby causing a vehicle to stall. In order to solve the above problems, a device for reducing the shaking of the fuel liquid level needs to be added to the fuel oil suction structure.

The fuel oil suction structure also comprises a peripheral cylinder body 17 which is vertically arranged in the cavity 2 and is surrounded on the oil suction pipe 4. The bottom side of the cylinder 17 is connected to the bottom side of the chamber 2. The cylinder 17 in this embodiment is a cylinder structure, and is fixed to the bottom side of the cavity 2 by welding. The cylinder 17 is provided with two communicating holes 18. The communication hole 18 is used to ensure that the fuel levels inside and outside the cylinder 17 are the same. The cylinder body 17 is used for separating fuel at the position of the oil suction pipe 4 from fuel at other positions of the cavity 2, and the fuel at the position of the oil suction pipe 4 is only communicated with the fuel at other positions of the cavity 2 through the communicating hole 18, so that the influence of fuel shaking at other positions in the cavity 2 on the fuel level at the position of the oil suction pipe 4 is reduced when an automobile runs. As shown in fig. 10, two communication holes 18 are symmetrically arranged on both sides of the bottom of the cylinder 17 along the central axis of the cylinder 17, and a line L connecting the center points of the two communication holes 18 is a horizontal line. On the horizontal plane, the line L connecting the two communication holes 18 is inclined to the direction of the vehicle. When the automobile runs, the fuel in the fuel tank 1 can shake along the front and back directions of the automobile. The connecting line L direction of the two communicating holes 18 is inclined with the advancing direction of the automobile, so that the communicating holes 18 are staggered with the shaking direction of the fuel oil by a certain angle. Through the orientation of rationally setting up intercommunicating pore 18, can avoid receiving the influence that the liquid level rocked when guaranteeing the inside and outside fuel intercommunication of barrel 17. By reducing the shaking amplitude of the fuel liquid level at the oil suction pipe 4, the vehicle can still normally operate under the condition that the fuel liquid level in the cavity 2 is lower.

On the horizontal plane, the inclination angle between the connecting line of the two communicating holes 18 and the advancing direction of the automobile is defined as alpha, and the alpha is more than or equal to 55 degrees and less than or equal to 65 degrees, and under the angle, when the liquid level of the oil tank 1 shakes, the shaking influence on the liquid level in the cylinder 17 is minimum.

Further, the opening area of the communication hole 18 is 2 to 2.5 times the cross-sectional area of the first oil delivery passage 5, ensuring a sufficient amount of oil in the cylinder 17. When the opening area of the communication hole 18 is less than 2 times the cross-sectional area of the first oil delivery passage 5, the amount of oil in the cylinder 17 is small and is insufficient to meet the demand of the engine. When the opening area of the communication hole 18 is larger than 2.5 times of the cross-sectional area of the first oil delivery channel 5, the opening area of the communication hole 18 is too large, and the shaking amplitude of the fuel liquid level in the cylinder 17 is too large.

In order to solve the same technical problem, the invention also provides an automobile which comprises an engine and the fuel oil suction structure in any technical scheme, wherein the engine is communicated with the first oil delivery passage 5 of the fuel oil suction structure. The second end of the connection pipe 13 is connected to the engine. The engine is communicated with the fuel pipe joint 12 through the connecting pipe 13, so that fuel in the fuel tank 1 enters the engine through a path of the oil suction hole 6, the first fuel delivery channel 5, the second fuel delivery channel 9, the oil outlet hole 10, the fuel pipe joint 12, the connecting hole 15, the third fuel delivery channel 16 and the engine. The fuel oil absorption structure is applied to the existing commercial vehicle, when the whole vehicle is debugged during offline, workers can inject as little fuel oil as possible into the fuel tank 1 of the vehicle to meet the vehicle debugging and running requirements, so that the fuel oil cost of the whole vehicle production debugging is greatly reduced, and the prediction can be averagely reduced by about 120 yuan/vehicle. In addition, in the production process, workers can further simplify the structure of the existing fuel sensor, the cost of parts is reduced, and 30-40 parts is expected to be reduced. The cost is comprehensively saved by 150 yuan per vehicle on average, the cost is reduced by 900 ten thousand per year by 6 ten thousand per year, and the cost reduction and efficiency improvement effects are obvious.

The working process of the invention is as follows: when the fuel oil filter is used, fuel oil in the cavity 2 is initially filtered through the filter screen 7, enters the first oil delivery channel 5 through the oil suction hole 6 on the oil suction pipe 4, then enters the fuel oil pipe joint 12 from the oil outlet hole 10 through the second oil delivery channel 9, and flows into an engine through the connecting hole 15 and the third oil delivery channel 16. The cylinder 17 separates the fuel near the suction pipe 4 from the fuel outside the cylinder 17, and the communication between the fuel inside and outside the cylinder 17 is maintained by the communication hole 18 at the bottom. In the running process of an automobile, the liquid level of fuel oil shakes, and because the area of the diameter of the communicating hole 18 is small, the fuel oil inside and outside the cylinder 17 cannot be rapidly blended, so that the shaking amplitude of the liquid level of the fuel oil in the cylinder 17 is far smaller than that of the liquid levels of other positions of the cavity 2. In the process of oil suction of the engine, fuel oil can enter the cylinder body 17 through the communicating hole 18 at the lower part of the cylinder body 17 and is sucked by the oil suction pipe 4 to communicate and supplement the fuel oil, so that smooth oil suction is ensured without interruption.

In summary, the embodiment of the invention provides a fuel oil absorption structure and an automobile, wherein a downward concave groove is formed in the bottom side of a cavity of an oil tank, and the groove can deposit particle impurities mixed in fuel oil. The oil suction pipe is vertically arranged in the groove, and a filter screen is arranged outside an oil suction hole on the oil suction pipe and can filter particle impurities in the fuel oil. The bottom side of the oil suction pipe is connected with the inner wall of the cavity, so that an oil suction hole in the oil suction pipe can adsorb fuel oil with a lower oil level, the unavailable volume at the bottom of the oil tank is reduced, and the actual volume utilization rate of the diesel fuel tank is improved. The invention has simple and reliable structure and low cost, and can ensure that the vehicle can be normally used under the condition of lower fuel liquid level. When the automobile using the fuel oil absorption structure is produced and debugged, the debugging requirement can be met only by a small amount of fuel oil, and the production and debugging cost of the automobile is low.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A fuel oil suction structure, comprising:

2. The fuel oil suction structure as set forth in claim 1, wherein the height of the filter mesh openings at the lowermost side of said filter net is higher than the height of the lowermost side of said cavity.

3. The fuel oil suction structure of claim 1, further comprising:

4. The fuel oil suction structure as recited in claim 3, wherein said filter screen is fitted around the upper periphery of said oil suction pipe, and the bottom side of said filter screen is connected to the top side of said oil passing bolt.

5. A fuel oil suction structure as set forth in claim 3, further comprising:

6. The fuel oil suction structure of claim 5, further comprising:

7. A fuel oil suction structure as set forth in any one of claims 1-6, further comprising:

8. The fuel suction structure according to claim 7, wherein an inclination angle of a line connecting said two communication holes with the advancing direction of the vehicle is defined as α, in a horizontal plane, 55 ° α or more and 65 ° or less.

9. The fuel oil suction structure of claim 7, wherein the opening area of said communication hole is 2 to 2.5 times the cross-sectional area of said first oil delivery passage.

10. An automobile comprising an engine and the fuel suction structure as recited in any one of claims 1 to 9, wherein the engine communicates with the first fuel delivery passage of the fuel suction structure.