Double-far-end oil suction device of automobile electric fuel pump

Abstract

The utility model provides a double-far-end oil suction device of an automobile electric fuel pump, which is used for double-far-end oil suction in an oil tank and comprises a blocking cover, a venturi tube upper cover, a venturi tube lower cover, a venturi tube and a throat tube. The venturi upper cover comprises an upper cover plate, two far-end oil inlet pipelines, two flowing pipelines and an upper cover middle spacer; one end of the blocking cover is connected with one ends of the two flowing pipelines; the venturi tube lower cover comprises a lower cover plate, two conical pipelines, a connecting pipeline and a lower cover middle spacer, the lower cover plate is connected with the upper cover plate to form a containing space, and the upper cover middle spacer is connected with the lower cover middle spacer to divide the containing space into two independent cavities; and the two conical pipelines are inserted into the other ends of the two flowing pipelines. The double-way far-end injection venturi tube structure is adopted, a pipeline can be arranged at the position, where fuel dead volume easily exists, in the fuel tank, and the fuel utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the field of fuel supply, in particular to a double-remote oil suction device used in an automobile electric fuel pump. Background Art

[0002] The electric fuel pump assembly is installed on the fuel tank and serves as a pipeline connection in the fuel supply system. The gasoline in the fuel tank is transported to the fuel pipeline through the filter and the oil outlet pipe through the suction force generated by the built-in gasoline pump when it is working, and is provided for engine consumption. In the fuel supply system, the fuel is first filtered through the primary filter to remove impurities in the fuel, and then pumped through the pump core. Part of it is supplied to the engine through the main pipeline, and the other part is returned to the fuel tank through the pressure valve.

[0003] The remote oil suction device is installed in the electric fuel pump barrel, and sucks the oil far away from the fuel pump into the electric fuel pump barrel inside the long strip or saddle-shaped fuel tank. Due to the different structures of the fuel tank, part of the fuel is not around the electric fuel pump. In order to fully utilize the fuel, a remote oil suction capability is required to suck the distant fuel into the fuel pump barrel at a certain rate, and supply it to the engine through the electric fuel pump.

[0004] The remote oil suction device of the prior art has the following defects in actual use:

[0005] (1) The current electric fuel pump assembly only provides one remote venturi injection function. When used in irregular, four-wheel drive, flat and other special-shaped fuel tanks, it cannot transfer all the fuel in the fuel tank to the fuel storage barrel of the electric fuel pump, resulting in an increase in the dead volume of fuel in the fuel tank and a decrease in the actual fuel usage rate.

[0006] Therefore, there is still room for improvement in the remote oil suction device of the fuel pump in the prior art. Utility Model Content

[0007] In view of the defects in the prior art, the purpose of the utility model is to provide a double remote oil suction device to reduce the dead volume of fuel in the fuel tank, so as to solve the problems of the prior art.

[0008] According to one aspect of the utility model, a dual-remote oil suction device for an automobile electric fuel pump is provided, which is used for dual-remote oil suction in a fuel tank. The dual-remote oil suction device comprises a baffle, a venturi upper cover, a venturi lower cover, a venturi and a throat. The baffle, the venturi upper cover, the venturi lower cover, the venturi and the throat are connected in sequence. The baffle comprises two L-shaped pipes; the venturi upper cover comprises an upper cover plate, two remote oil inlet pipes, two flow pipes and an upper cover middle spacer, and one end of the baffle is connected to one end of the two flow pipes; the venturi lower cover comprises A lower cover plate, two conical pipes, a connecting pipe and a lower cover middle partition, the lower cover plate is connected to the upper cover plate to form an accommodating space, the upper cover middle partition is connected to the lower cover middle partition to divide the accommodating space into two independent cavities, the two conical pipes are inserted into the other ends of the two flow pipes; the venturi tube includes a driving oil inlet pipe, a driving flow channel and an oil outlet pipe, the driving oil inlet pipe, the driving flow channel and the oil outlet pipe are connected in sequence, the driving oil inlet pipe is connected to one end of the driving oil pipe, and the oil outlet pipe is connected to the connecting pipe.

[0009] Preferably, the dual remote oil suction device further comprises two remote oil suction pipes and two oil pipe joints, one end of the two remote oil suction pipes is connected to the two remote oil inlet pipelines, and the other end of the two remote oil suction pipes is connected to the two oil pipe joints.

[0010] Preferably, the other end of the driving oil pipe is connected to the oil outlet pipeline of the pump core.

[0011] Preferably, the dual remote oil suction device further comprises an O-ring, and the O-ring is sleeved and connected to the oil outlet pipeline.

[0012] Preferably, the dual remote oil suction device further comprises a steel ball, and the steel ball is arranged in the driving flow channel.

[0013] The purpose of this application is to improve the existing fuel pump assembly, the main purpose of which is to adapt to the complex fuel tank structure. The specific purposes are as follows:

[0014] (I) Design a dual-path remote ejection venturi, because the vehicle fuel tank has different shapes (irregular, four-wheel drive, flat) and functions, and the fuel tank is in various simulated tilt angles, so the conventional electric fuel pump assembly cannot transfer the fuel in the fuel tank to the electric fuel pump assembly. The dual-path remote ejection venturi can quickly and effectively meet the fuel delivery requirements of the above various fuel tank shapes.

[0015] (ii) Design a dual-path remote injection venturi to reduce the factors affecting performance: the injection cavities in the dual-path remote injection venturi are independent of each other and do not affect each other, and the injection nozzle can be adjusted to adjust the delivery amount of each fuel path.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The utility model adopts a dual-path remote-ejection venturi structure, which can arrange the pipeline at a position where dead volume of fuel is likely to exist inside the fuel tank, and is a dual-point arrangement, which can transport all the fuel in the fuel tank to the oil storage barrel of the electric fuel pump assembly, thereby improving fuel utilization.

[0018] Of course, implementing any specific embodiment of the present invention does not necessarily achieve all of the above technical effects at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0020] Figure 1 This is a schematic diagram of the appearance of the double remote oil suction device of the present application;

[0021] Figure 2 This is a schematic diagram of the location of the dual remote oil suction device on the fuel pump of this application;

[0022] Figure 3 This is a schematic diagram of the location of the dual remote oil suction device in the oil tank of this application;

[0023] Figure 4 This is a schematic diagram of the explosion of the double remote oil suction device of this application;

[0024] Figure 5 This is a schematic diagram of the explosion of the blocking cover, the upper cover of the venturi tube, and the lower cover of the venturi tube in this application;

[0025] Figure 6 This is a schematic diagram of the assembly of the blocking cover, the upper cover of the venturi tube, and the lower cover of the venturi tube in this application;

[0026] Figure 7 This is a cross-sectional schematic diagram of the double remote oil suction device of the present application;

[0027] Figure 8 This is another cross-sectional schematic diagram of the double remote oil suction device of the present application;

[0028] Fig. 9 This is another cross-sectional schematic diagram of the dual remote oil suction device of the present application. DETAILED DESCRIPTION

[0029] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the utility model. These all fall within the scope of protection of the utility model.

[0030] See also Figure 1 The appearance diagram of the double remote oil suction device of the present application is a double remote oil suction device for an automobile electric fuel pump, which is used for double remote oil suction in a fuel tank. The double remote oil suction device comprises a baffle 1, a venturi upper cover 2, a venturi lower cover 3, an actively ejected venturi 5 and a throat 7. The baffle 1, the venturi upper cover 2, the venturi lower cover 3, the venturi 5 and the throat 7 are connected in sequence. Figure 2 As shown, the blocking cover 1, the venturi upper cover 2, the venturi lower cover 3, the venturi 5 and the throat 7 are arranged inside the oil storage barrel of the fuel pump, and the fuel sucked from the far end enters the oil storage barrel 10.

[0031] Please refer to Figure 4 , Figure 5 , Figure 6 and Figure 7 The stopper 1 includes two L-shaped pipes 11, through which the fuel is sprayed into the oil storage barrel 10 from above; the venturi upper cover 2 includes an upper cover plate 21, two distal oil inlet pipes 22, two flow pipes 23 and an upper cover middle partition 24, one end of the stopper 1 is connected to one end of the two flow pipes 23, that is, the end of the two flow pipes 23 where the fuel flows out. Figure 5 , Figure 6 and Figure 7 As shown, the two flow pipes 23 are each provided with a positioning protrusion on the corresponding outer surface through the center of the circle, and the corresponding position of the blocking cover 1 is provided with a positioning groove. When the positioning groove is connected to the positioning protrusion, the upper end surface of the two flow pipes 23 is located at the outlet height of the L-shaped pipe 11 of the blocking cover 1, so as to facilitate the fuel to be sprayed out; the fuel flows into the blocking cover 1 from the two flow pipes 23, and is sprayed out at the other outlet of the L-shaped pipe 11 into the oil storage barrel 10.

[0032] Also, please refer to Figure 4 , Figure 8 and Fig. 9The venturi lower cover 3 includes a lower cover plate 31, two conical pipes 32, a connecting pipe 33 and a lower cover middle spacer 34. The lower cover plate 31 is connected to the upper cover plate 21 to form an accommodating space. In the embodiment of the present application, the lower cover plate 31 and the upper cover plate 21 are formed by a hot plate welding process. The heat generated by the hot plate softens the joint surface for pressurized welding. The device is simple and the welding strength is high. The upper cover middle spacer 24 is connected to the lower cover middle spacer 34 to separate the accommodating space into two independent cavities 35. The fuel flows in the independent cavity 35. Fig. 9 As shown, the fuel flow path is to flow into the distal fuel inlet pipe 22, Figure 8 , Fig. 9 The arrow in the figure indicates the fuel flow path, which flows through the independent cavity 35 and then flows from the flow pipe 23 to the blocking cover 1; the conical pipe 32 is inserted into the other end of the flow pipe 23, as shown in FIG. Figure 8 , Fig. 9 As shown by the arrow, the fuel coming out of the tapered pipe 32 is directly sprayed into the flow pipe 23, forming an attraction force at the outer root of the tapered pipe 32, that is, the lower end of the outer side. The faster the fuel injection speed, the greater the attraction force. The attraction force sucks the fuel in the distal oil inlet pipe 22 through the independent cavity 35 formed by the lower cover plate 31 and the upper cover plate 21, thereby driving the distal fuel to enter. The two independent cavities 35 are independent of each other and do not affect each other.

[0033] Please refer to Figure 1 and Figure 3 The dual remote oil suction device also includes two remote oil suction pipes 81 and two oil pipe joints 82. One end of the two remote oil suction pipes 81 is connected to the two remote oil inlet pipelines 22, and the other end of the two remote oil suction pipes 81 is connected to the two oil pipe joints 82. Figure 3 In the embodiment of the present application, the fuel tank is an irregular fuel tank, and one of the two oil pipe joints 82 is arranged to the left at the left recess A, and the other is arranged to the right at the right recess B. Oil suction at two positions can reduce the dead volume of fuel in the fuel tank.

[0034] In addition, if Figure 1 , Figure 2 and Figure 4 As shown, the venturi 5 includes a driving oil inlet pipeline 51, a driving flow channel 52 and an oil outlet pipeline 53, and the driving oil inlet pipeline 51, the driving flow channel 52 and the oil outlet pipeline 53 are connected in sequence. The driving oil inlet pipeline 51 is connected to the driving oil pipe 91. A part of the fuel pumped out by the pump core 9 enters the driving oil pipe 91 in the pump core oil outlet pipeline, and then enters the venturi 5 from the driving oil inlet pipeline 51. The oil outlet pipeline 53 is inserted into and connected to the connecting pipeline 33. Fig. 9As shown, the end of the oil outlet pipe 53 is against the bottom of the tapered pipe 32, so that the fuel sprayed from the oil outlet pipe 53 directly enters the tapered pipe 32, which can generate attraction to the greatest extent.

[0035] Please refer to Figure 4 The dual remote oil suction device of the present application also includes an O-ring 4, which is sleeved and connected to the oil outlet pipe 53. After assembly, the O-ring 4 is pressed and connected between the outer wall of the oil outlet pipe 53 and the inner wall of the connecting pipe 33 to form a sealed state to prevent fuel leakage from affecting the suction force. In addition, the dual remote oil suction device of the present application also includes a steel ball 6, which is arranged in the driving flow channel 52 and is assembled at another outlet of the driving flow channel 52. In the present application, this outlet is not used and is closed by the steel ball 6.

[0036] The dual remote oil suction device of the present application is installed in the oil storage barrel of the fuel pump, and its specific purpose is:

[0037] 1. The ejection function of the remote ejection venturi is driven by Bernoulli's air suction effect. The pump core oil outlet is used to divert the driving flow to the venturi. The diameter of the ejection nozzle is reduced to increase the fluid flow rate. The pressure at the nozzle is lower than the pressure of the surrounding fluid. The surrounding fluid will be sucked into the venturi cavity and enter the oil storage tank of the electric fuel pump from the venturi outlet for use in the engine.

[0038] 2. The remote ejection venturi structure can actively, efficiently and quickly replenish the fuel in the fuel tank to the oil storage barrel of the electric fuel pump for use by the engine. During use, the fuel in the oil storage barrel is always in an overflowing state.

[0039] The working principle of the double remote siphon of the present application is: the double remote oil suction device is installed in the oil storage barrel 10 of the electric fuel pump, and the driving flow of the fuel driving oil pipe 91 sucks the fuel at the external remote end through the venturi in the double remote oil suction device, and sprays it into the oil storage barrel of the electric fuel pump by using the pipeline and the cover of the double remote oil suction device. The fuel enters from the driving oil inlet pipeline 51 through the driving flow channel 52 and enters the tapered pipeline 32 from the oil outlet pipeline 53, and generates attraction when flowing out of the tapered pipeline 32. The fuel then flows from the flow pipeline 23 through the cover 1 and sprays into the oil storage barrel; the siphon flow path of the present application is: when the fuel flows out of the tapered pipeline 32, it generates attraction, driving the fuel at the remote end to enter from the remote oil inlet pipeline 22, and sprays into the oil storage barrel through the cover 1 via the flow pipeline 23.

[0040] Compared with the prior art, the utility model has the following beneficial effects:

[0041] 1. The utility model adopts a dual-path remote-ejection venturi structure, which can arrange the pipeline at a position where dead volume of fuel is likely to exist inside the fuel tank, and is a dual-point arrangement, which can transport all the fuel in the fuel tank to the oil storage barrel of the electric fuel pump assembly, thereby improving fuel utilization.

[0042] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. A dual remote oil suction device for an automobile electric fuel pump, used for dual remote oil suction in a fuel tank, characterized in that: The double remote oil suction device comprises a baffle, a venturi upper cover, a venturi lower cover, a venturi and a throat, wherein the baffle, the venturi upper cover, the venturi lower cover, the venturi and the throat are connected in sequence, and the baffle comprises two L-shaped pipes; the venturi upper cover comprises an upper cover plate, two remote oil inlet pipes, two flow pipes and an upper cover middle septum, and one end of the baffle is connected to one end of the two flow pipes; the venturi lower cover comprises a lower cover plate, two conical pipes, a connecting pipe and a lower cover middle septum, the lower cover plate is connected to the upper cover plate to form a accommodating space, the upper cover middle septum is connected to the lower cover middle septum to divide the accommodating space into two independent cavities, and the two conical pipes are inserted into the other ends of the two flow pipes; the venturi comprises a driving oil inlet pipe, a driving flow channel and an oil outlet pipe, and the driving oil inlet pipe, the driving flow channel and the oil outlet pipe are connected in sequence, the driving oil inlet pipe is connected to one end of the driving oil pipe, and the oil outlet pipe is connected to the connecting pipe.

2. The dual remote oil suction device for an automobile electric fuel pump according to claim 1, characterized in that: The dual remote oil suction device also includes two remote oil suction pipes and two oil pipe joints, one end of the two remote oil suction pipes is connected to the two remote oil inlet pipelines, and the other end of the two remote oil suction pipes is connected to the two oil pipe joints.

3. The dual remote oil suction device for an automobile electric fuel pump according to claim 2, characterized in that: The other end of the driving oil pipe is connected to the oil outlet pipeline of the pump core.

4. The dual remote oil suction device for an automobile electric fuel pump according to claim 1, characterized in that: The double remote oil suction device also includes an O-ring, and the O-ring is sleeved and connected to the oil outlet pipeline.

5. The dual remote oil suction device for an automobile electric fuel pump according to claim 1, characterized in that: The double-remote oil suction device also includes a steel ball, which is arranged in the driving flow channel.

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