Double-injection oil suction fuel pump assembly

Abstract

The invention discloses a double-injection oil suction fuel pump assembly which comprises an oil storage barrel, a top cover, an upper cover and a pump core and is characterized in that the upper cover is provided with double oil nozzles and a nozzle assembly, the pump core is provided with a main oil outlet nozzle and an auxiliary oil outlet nozzle, the main oil outlet nozzle is communicated with an oil outlet of the top cover, and the auxiliary oil outlet nozzle is communicated with a lower oil inlet of the double oil nozzles. The nozzle assembly and the upper cover form a double-injection oil suction structure, the double-injection oil suction structure comprises a first oil nozzle, a second oil nozzle, a first siphon oil nozzle and a second siphon oil nozzle, the upper ends of the first oil nozzle and the second oil nozzle are connected with two upper oil outlets of the double oil nozzles respectively, the hole diameters of the lower ends of the first oil nozzle and the second oil nozzle are reduced, and the first oil nozzle and the second oil nozzle are provided with a first injection cavity and a second injection cavity respectively. The first siphon oil nozzle is communicated with the front far end of the oil tank through a first oil suction pipe, and the second siphon oil nozzle is communicated with the rear far end of the oil tank through a second oil suction pipe. The oil suction function is optimized and expanded to the front and rear far ends of the oil tank.

Description

Technical Field

[0001] The present invention relates to an improved invention of a fuel pump assembly, and particularly to an improved invention of a double-ejector oil-sucking fuel pump assembly. Background Art

[0002] An electric fuel pump assembly is composed of a fuel pump, an oil storage barrel, a pressure valve, an oil level sensor, a top cover, a filter screen, etc. It is a combined body and the core component of the fuel supply system, mainly responsible for pumping fuel out of the fuel tank and delivering it to the fuel injection system of the engine through pressurization, ensuring that the engine can obtain stable and sufficient fuel supply under various low-temperature and harsh environments. However, when focusing on snowmobiles designed specifically for extreme snow and ice environments, their operating environments exhibit unprecedented complexity and variability, including but not limited to the challenges of steep and rugged uphill and downhill slopes and the need for high-speed galloping. In addition, the fuel tank of a snowmobile has a unique design with a large lateral span. This characteristic causes a key problem when the fuel stock is low or the vehicle is at a specific inclination angle (such as uphill or downhill): uneven distribution of fuel in the fuel tank, resulting in a significant decrease in fuel utilization rate, inability to achieve the optimal utilization of fuel resources, and thus affecting the overall endurance and performance of the vehicle. Therefore, a new type of fuel pump assembly is needed to solve the above problems for the above special working conditions. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a double-ejector oil-sucking fuel pump assembly with the ability to suck oil from the front and rear distal ends of the fuel tank.

[0004] To solve the above technical problem, the present invention is implemented by adopting the following technical solution: This double-ejector oil-sucking fuel pump assembly includes an oil storage barrel, a top cover, an upper cover, and a pump core. It is characterized in that: the upper cover is provided with a double oil nozzle and a nozzle assembly; the pump core is provided with a main oil outlet nozzle and a secondary oil outlet nozzle. The main oil outlet nozzle is communicated with the top cover oil outlet, and the secondary oil outlet nozzle is communicated with the lower oil inlet of the double oil nozzle. The nozzle assembly and the upper cover form a double-ejector oil-sucking structure. The double-ejector oil-sucking structure includes a first injection nozzle, a second injection nozzle, a first siphon oil nozzle, and a second siphon oil nozzle. The upper ends of the first injection nozzle and the second injection nozzle are respectively connected to the two upper oil outlets of the double oil nozzle. The apertures of the lower ends of the first injection nozzle and the second injection nozzle are reduced, and the first injection nozzle and the second injection nozzle are respectively provided with a first injection cavity and a second injection cavity. The first siphon oil nozzle and the second siphon oil nozzle are respectively communicated with the first injection cavity and the second injection cavity. The first siphon oil nozzle is communicated to the front distal end of the fuel tank through a first suction pipe, and the second siphon oil nozzle is communicated to the rear distal end of the fuel tank through a second suction pipe.

[0005] Copper nozzles are respectively internally installed at the lower ends of the first injection nozzle and the second injection nozzle, and the aperture of the copper nozzle is 0.5 mm.

[0006] The top cover angle is adjustable and is arranged on the oil storage barrel. Corresponding brackets are respectively provided on the top cover and the upper cover. The brackets are connected by a pin shaft, and a support torsion spring is arranged on the corresponding pin shaft.

[0007] The double oil nozzles and the nozzle assembly are respectively fixedly connected to the upper cover by a hot plate welding process.

[0008] Filter screens are connected to the ends of the first oil suction pipe and the second oil suction pipe.

[0009] The double oil nozzles, the first fuel injection nozzle, the second fuel injection nozzle, and the first siphon oil nozzle are all arranged upward, and the second siphon oil nozzle is arranged downward and is connected to the edge of the upper cover.

[0010] The first injection cavity and the second injection cavity are respectively composed of venturi tubes, and the corresponding venturi tubes are connected to the upper cover.

[0011] The beneficial effect of the present invention is that the improved double ejector oil suction fuel pump assembly, by setting a double ejector oil suction structure, uses part of the fuel output by the electronic fuel injection pump as the power source to perform the ejector oil suction operation. Its unique feature is that the oil suction function is optimized and extended to the farthest positions at the front and rear ends of the fuel tank. This design ensures that even when the vehicle is at extreme inclination angles such as uphill and downhill, resulting in uneven fuel distribution and local fuel shortage in the fuel tank, the fuel at each corner of the fuel tank can be effectively pumped, thus avoiding the problem of fuel shortage, significantly improving the fuel utilization rate and the vehicle's endurance. Through this innovative design, the present invention not only solves the problem of low fuel utilization efficiency in the prior art, but also further enhances the adaptability and reliability of the snowmobile in complex and changeable environments. Description of the Drawings

[0012] The following further details the specific implementation manners of the present invention with reference to the drawings.

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 It is a schematic diagram of the upper cover structure of the present invention Figure 1 。

[0015] Figure 3 It is a schematic diagram of the upper cover structure of the present invention Figure 2 。

[0016] Figure 4 It is an exploded view of the structure of the present invention. Specific Embodiment

[0017] The drawings show the structure of the present invention, and the following further explains its relevant details with reference to the drawings. In this embodiment, refer to the attached Figures 1-4The double-injection fuel pump assembly includes an oil storage barrel 1, a top cover 2, an upper cover 3, a pump core 4, a pressure valve 5 and an oil level sensor 6. The oil storage barrel 1 is connected to the upper cover 3 by a buckle. The upper cover 3 is provided with a double oil nozzle 7 and a nozzle assembly. The double oil nozzle 7 includes a lower oil inlet located below the upper cover 3 and two oil outlets located above the upper cover 3. The pump core 4 is provided with a main oil outlet nozzle and a secondary oil outlet nozzle. The main oil outlet nozzle is connected to the oil outlet of the top cover 2, and the secondary oil outlet nozzle is connected to the lower oil inlet of the double oil nozzle 7. The nozzle assembly and the upper cover 3 form a double-injection fuel suction structure. The double-injection fuel suction structure includes a first fuel injection nozzle 8, a second fuel injection nozzle 9, and a second fuel injection nozzle 10. The fuel injection nozzle 9, the first siphon fuel injection nozzle 10, and the second siphon fuel injection nozzle 11, the upper ends of the first fuel injection nozzle 8 and the second fuel injection nozzle 9 are respectively connected to the two upper fuel outlets of the double fuel nozzle 7, the lower end apertures of the first fuel injection nozzle 8 and the second fuel injection nozzle 9 are reduced, and the first fuel injection nozzle 8 and the second fuel injection nozzle 9 are respectively equipped with a first injection cavity 12 and a second injection cavity 13, the first siphon fuel injection nozzle 10 and the second siphon fuel injection nozzle 11 are respectively connected to the first injection cavity 12 and the second injection cavity 13, the first siphon fuel injection nozzle 10 is connected to the front far end of the fuel tank through the first suction pipe 14, and the second siphon fuel injection nozzle 11 is connected to the rear far end of the fuel tank through the second suction pipe 15. Among them, the fuel nozzles and fuel ports used for connection are all fir tree tube structures, which are convenient for quick and stable connection with the corrugated pipe, and the first suction pipe 14 and the second suction pipe 15 are both shaped corrugated pipes.

[0018] The working principle of the present invention is that the pump core 4 pumps the fuel in the fuel storage barrel 1 out from the auxiliary fuel nozzle and sends it to the lower fuel inlet of the double fuel nozzle 7 through the bellows. Then the fuel is sent from the two upper fuel outlets of the double fuel nozzle 7 through the bellows to the independent first fuel nozzle 8 and the second fuel nozzle 9. When the fuel passes through the first fuel nozzle 8 and the second fuel nozzle 9, the fuel nozzle changes from a large aperture to a small aperture, the fuel flow rate is accelerated, and a high-speed jet is formed. Then, the jet passes through the first injection cavity 12 and the second injection cavity 13, and a strong negative pressure effect is generated at the nozzle. Due to the first injection cavity 12 and the second injection cavity 13, the fuel nozzle 8 and the second injection cavity 9 are connected to each other. The first siphon oil nozzle 10 and the second siphon oil nozzle 11 are respectively connected, and the high-speed flow of the extremely fast injection forms a siphon effect. The first oil suction pipe 14 connected to the first siphon oil nozzle 10 and the second oil suction pipe 15 connected to the second siphon oil nozzle 11 can respectively suck oil from the front far end and the rear far end of the fuel tank, thereby driving the fuel at the front and rear far ends of the fuel tank to enter the fuel storage barrel 1 more effectively and quickly. Even when the fuel in the fuel tank is unevenly distributed or the vehicle is in a tilted state, it can ensure that at least one end of the front far end and the rear far end of the fuel tank is in siphoning fuel and the other end is in empty suction, thereby still ensuring the fuel supply.

[0019] As a further improved specific implementation, the first fuel injector 8 and the second fuel injector 9 have copper nozzles 16 built into their lower ends, which are specifically pressed into place. The aperture of the copper nozzle 16 is 0.5 mm. Compared with the traditional one-piece-molded or plastic nozzle installed on the nozzle, the copper nozzle 16 has a more stable structure and a smaller aperture.

[0020] As a specific embodiment of further improvement, the angle of the top cover 2 is adjustably arranged on the oil storage barrel 1. Corresponding brackets are respectively provided on the top cover 2 and the upper cover 3, and the brackets are connected by a pin shaft 17. A support torsion spring is arranged on the corresponding pin shaft 17, so that the top cover 2 can move in a certain direction and change multiple angles with the oil storage barrel 1.

[0021] As a specific embodiment of further improvement, the double oil nozzles 7 and the nozzle assembly are respectively fixedly connected to the upper cover 3 by a hot plate welding process, so that the connection is firm and the sealing performance is good, avoiding oil leakage.

[0022] As a specific embodiment of further improvement, filter screens 18 are connected to the ends of the first oil suction pipe 14 and the second oil suction pipe 15 for filtration.

[0023] As a specific embodiment of further improvement, the double oil nozzles 7, the first oil injection nozzle 8, the second oil injection nozzle 9, and the first siphon oil nozzle 10 are all arranged upward, and the second siphon oil nozzle 11 is arranged downward and connected to the edge of the upper cover 3. The positions of the oil nozzles are reasonably arranged to avoid interference between the oil suction pipes.

[0024] As a specific embodiment of further improvement, the first injection cavity 12 and the second injection cavity 13 are respectively composed of venturi tubes, and the corresponding venturi tubes are connected to the upper cover 3. The middle cavity of the venturi tube has a reduced diameter structure, which can be used to improve the ejection effect.

[0025] In summary, the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-injection fuel pump assembly, comprising an oil storage barrel, a top cover, an upper cover and a pump core, characterized in that: The upper cover is provided with a double oil nozzle and a nozzle assembly, the pump core is provided with a main oil outlet nozzle and a secondary oil outlet nozzle, the main oil outlet nozzle is connected to the oil outlet of the top cover, and the secondary oil outlet nozzle is connected to the lower oil inlet of the double oil nozzle, the nozzle assembly and the upper cover form a double-injection oil suction structure, the double-injection oil suction structure includes a first oil nozzle, a second oil nozzle, a first siphon oil nozzle, and a second siphon oil nozzle, the upper ends of the first oil nozzle and the second oil nozzle are respectively connected to the two upper oil outlets of the double oil nozzle, the apertures of the lower ends of the first oil nozzle and the second oil nozzle are reduced, and the first oil nozzle and the second oil nozzle are respectively equipped with a first injection cavity and a second injection cavity, the first siphon oil nozzle and the second siphon oil nozzle are respectively connected to the first injection cavity and the second injection cavity, the first siphon oil nozzle is connected to the front far end of the oil tank through the first oil suction pipe, and the second siphon oil nozzle is connected to the rear far end of the oil tank through the second oil suction pipe.

2. The double-injection fuel pump assembly according to claim 1, characterized in that: The first fuel injector and the second fuel injector have copper nozzles built in at their lower ends, respectively, and the copper nozzles have an aperture of 0.5 mm.

3. The double-injection fuel pump assembly according to claim 1, characterized in that: The top cover is adjustable in angle and is arranged on the oil storage barrel. The corresponding top cover and upper cover are respectively provided with brackets, the brackets are connected by pins, and the corresponding pins are provided with supporting torsion springs.

4. The double-injection fuel pump assembly according to claim 1, characterized in that: The double oil nozzles and the nozzle assembly are respectively fixedly connected to the upper cover through a hot plate welding process.

5. The double-injection fuel pump assembly according to claim 1, characterized in that: The ends of the first oil suction pipe and the second oil suction pipe are both connected with filter screens.

6. The double-injection fuel pump assembly according to claim 1, characterized in that: The double oil nozzles, the first oil spray nozzle, the second oil spray nozzle, and the first siphon oil nozzle are all arranged upwards, and the second siphon oil nozzle is arranged downwards and connected to the edge of the upper cover.

7. The double-injection fuel pump assembly according to claim 1, characterized in that: The first injection cavity and the second injection cavity are respectively formed by venturi tubes, and the corresponding venturi tubes are connected to the upper cover.

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