Double-injection oil suction fuel pump assembly
By using a dual ejector fuel pump assembly, the fuel suction range is extended to both ends of the fuel tank, solving the problem of low fuel utilization in extreme environments and improving the vehicle's range and performance.
Patent Information
- Application Number
- CN202520820947.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-04-28
AI Technical Summary
Existing electric fuel pump assemblies cannot effectively utilize fuel in the tank under extreme snow and ice conditions, resulting in low fuel efficiency and affecting vehicle range and performance.
Design a dual-ejector fuel pump assembly, which adopts a dual-nozzle, nozzle assembly and siphon nozzle structure to extend the fuel suction range to both ends of the fuel tank. It uses the power source of the electronic fuel injection pump for ejector fuel suction to ensure that fuel can be effectively extracted from all corners of the fuel tank even at extreme tilt angles.
It improves fuel efficiency, enhances vehicle adaptability and reliability in complex environments, and ensures a stable fuel supply.
Smart Images
Figure CN223647941U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an improved invention of a fuel pump assembly, and more particularly to an improved invention of a dual-ejector fuel pump assembly. Background Technology
[0002] The electric fuel pump assembly, composed of a fuel pump, reservoir, pressure valve, fuel level sensor, top cover, and filter, is a core component of the fuel supply system. Its primary function is to extract fuel from the tank and pressurize it for delivery to the engine's fuel injection system, ensuring a stable and sufficient fuel supply to the engine under various low-temperature and harsh environments. However, when focusing on snowmobiles designed for extreme snow and ice conditions, their operating environment exhibits unprecedented complexity and variability, including but not limited to the challenges of steep and rugged inclines and the demands of high-speed driving. Furthermore, the unique design of the snowmobile's fuel tank, with its significant lateral span, raises a critical issue when fuel levels are low or the vehicle is at a specific angle of inclination (such as on inclines or declines): uneven fuel distribution within the tank leads to a significant decrease in fuel efficiency, hindering optimal fuel utilization and consequently affecting the vehicle's overall range and performance. Therefore, a new type of fuel pump assembly is needed to address these specific operating conditions. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a dual ejector fuel pump assembly with the ability to suck oil from the front and rear ends of the fuel tank.
[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: This dual-ejector fuel pump assembly includes a fuel tank, a top cover, an upper cover, and a pump core. Its features include: the upper cover is provided with dual fuel nozzles and a nozzle assembly; the pump core is provided with a main fuel outlet and a secondary fuel outlet; the main fuel outlet is connected to the fuel outlet of the top cover; the secondary fuel outlet is connected to the lower fuel inlet of the dual fuel nozzles; the nozzle assembly and the upper cover form a dual-ejector fuel suction structure, which includes a first fuel injector, a second fuel injector, and... The first siphon nozzle and the second siphon nozzle are connected at their upper ends to the two upper oil outlets of the dual nozzles, respectively. The lower end orifices of the first and second oil injectors are reduced in size, and the first and second oil injectors are respectively equipped with a first injection chamber and a second injection chamber. The first siphon nozzle and the second siphon nozzle are respectively connected to the first injection chamber and the second injection chamber. The first siphon nozzle is connected to the far front end of the oil tank through the first oil suction pipe, and the second siphon nozzle is connected to the far rear end of the oil tank through the second oil suction pipe.
[0005] The lower ends of the first and second fuel injectors are respectively equipped with copper nozzles, and the diameter of the copper nozzles is 0.5mm.
[0006] The top cover is adjustable and mounted on the oil storage tank. The top cover and the upper cover are respectively equipped with brackets, which are connected by pins. Support torsion springs are installed on the corresponding pins.
[0007] The dual oil nozzles and nozzle assembly are fixedly connected to the top cover by hot plate welding.
[0008] Both the first and second oil suction pipes are connected to a filter screen at their ends.
[0009] The dual oil nozzles, the first oil nozzle, the second oil nozzle, and the first siphon oil nozzle are all arranged facing upwards, while the second siphon oil nozzle is arranged facing downwards and connected to the edge of the upper cover.
[0010] The first and second injection chambers are each composed of a venturi tube, and the corresponding venturi tubes are connected to the upper cover.
[0011] The beneficial effect of this utility model lies in the improved dual-ejector fuel pump assembly. By setting up a dual-ejector fuel suction structure, which uses a portion of the fuel output from the electronic fuel injection pump as a power source for the ejector fuel suction operation, its unique feature is that the fuel suction function is optimized and extended to the furthest positions at both ends of the fuel tank. This design ensures that even when the vehicle is at extreme tilt angles such as going uphill or downhill, resulting in uneven fuel distribution and local fuel shortages, fuel can still be effectively extracted from all corners of the fuel tank. This avoids the problem of insufficient fuel and significantly improves fuel utilization and the vehicle's range. Through this innovative design, this utility model not only solves the problem of inefficient fuel utilization in existing technologies but also further enhances the adaptability and reliability of snowmobiles in complex and changing environments. Attached Figure Description
[0012] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.
[0013] Figure 1 This is a schematic diagram of the structure of this utility model.
[0014] Figure 2 This is a schematic diagram of the upper cover structure of this utility model. Figure 1 .
[0015] Figure 3 This is a schematic diagram of the upper cover structure of this utility model. Figure 2 .
[0016] Figure 4 This is an exploded view of the structure of this utility model. Detailed Implementation
[0017] The accompanying drawings illustrate the structure of this utility model, and further details will be described below with reference to the drawings. In this embodiment, see the attached drawings. Figure 1-4The dual-ejector fuel pump assembly includes a fuel tank 1, a top cover 2, an upper cover 3, a pump core 4, a pressure valve 5, and a fuel level sensor 6. The fuel tank 1 and the upper cover 3 are connected by a snap-fit. The upper cover 3 is equipped with dual fuel nozzles 7 and a nozzle assembly. The dual fuel nozzles 7 include a lower fuel inlet located below the upper cover 3 and two fuel outlets located above the upper cover 3. The pump core 4 is equipped with a main fuel outlet and a secondary fuel outlet. The main fuel outlet is connected to the fuel outlet of the top cover 2, and the secondary fuel outlet is connected to the lower fuel inlet of the dual fuel nozzles 7. The nozzle assembly and the upper cover 3 form a dual-ejector fuel suction structure, which includes a first fuel injector 8 and a second fuel injector 9. The system includes fuel injectors 9, a first siphon fuel injector 10, and a second siphon fuel injector 11. The upper ends of the first fuel injector 8 and the second fuel injector 9 are connected to the two upper fuel outlets of the dual fuel injectors 7, respectively. The lower end orifices of the first fuel injector 8 and the second fuel injector 9 are reduced in diameter, and the first fuel injector 8 and the second fuel injector 9 are respectively equipped with a first injection chamber 12 and a second injection chamber 13. The first siphon fuel injector 10 and the second siphon fuel injector 11 are respectively connected to the first injection chamber 12 and the second injection chamber 13. The first siphon fuel injector 10 is connected to the far front end of the fuel tank via the first fuel suction pipe 14, and the second siphon fuel injector 11 is connected to the far rear end of the fuel tank via the second fuel suction pipe 15. All fuel injectors and fuel inlets used for connection are made of fir tube structure, which facilitates quick and stable connection with the corrugated pipe. The first fuel suction pipe 14 and the second fuel suction pipe 15 are both shaped corrugated pipes.
[0018] The working principle of this utility model is as follows: the pump core 4 pumps fuel from the oil storage tank 1 through the auxiliary outlet nozzle, and sends it through the bellows to the lower inlet of the dual nozzle 7. Then, the fuel is sent from the two upper outlets of the dual nozzle 7 through the bellows to the independent first injector 8 and second injector 9 respectively. When the fuel passes through the first injector 8 and the second injector 9 respectively, the injector changes from a large diameter to a small diameter, the fuel flow rate increases, forming a high-speed jet. After passing through the first injection chamber 12 and the second injection chamber 13, the jet generates a strong negative pressure effect at the nozzle. Due to the strong negative pressure effect at the nozzle, the first injection chamber 12 and the second injection chamber 13 generate a strong negative pressure effect. 3 is connected to the first siphon nozzle 10 and the second siphon nozzle 11 respectively. The high-speed flow of the rapid injection forms a siphon effect. The first oil suction pipe 14 connected to the first siphon nozzle 10 and the second oil suction pipe 15 connected to the second siphon nozzle 11 can respectively suck oil from the far front end and the far rear end of the fuel tank, thereby driving the fuel from the far front end and the far rear end of the fuel tank to enter the fuel storage tank 1 more effectively and quickly. Even when the fuel distribution in the fuel tank is uneven or the vehicle is tilted, it can ensure that at least one end of the far front end and the far rear end of the fuel tank is siphoning fuel and the other end is empty, so that the fuel supply can still be guaranteed.
[0019] As a further improved implementation, the lower ends of the first fuel injector 8 and the second fuel injector 9 are respectively equipped with copper nozzles 16, which are press-fitted. The diameter of the copper nozzle 16 is 0.5mm. Compared with traditional one-piece molded or plastic nozzles installed on the nozzle, the copper nozzle 16 has a more stable structure and a smaller diameter.
[0020] As a further improved specific implementation, the top cover 2 is angle-adjustable and is set on the oil storage tank 1. The top cover 2 and the upper cover 3 are respectively provided with brackets, and the brackets are connected by a pin 17. A support torsion spring is provided on the corresponding pin 17, so that the top cover 2 can move in a certain direction and change multiple angles with the oil storage tank 1.
[0021] As a further improved implementation, the dual oil nozzles 7 and the nozzle assembly are fixedly connected to the upper cover 3 by a hot plate welding process, which makes the connection firm, has good sealing performance, and avoids oil leakage.
[0022] As a further improved specific implementation, both the first oil suction pipe 14 and the second oil suction pipe 15 are connected to a filter screen 18 for filtration.
[0023] As a further improved implementation, the dual oil nozzles 7, the first oil nozzle 8, the second oil nozzle 9, and the first siphon oil nozzle 10 are all arranged facing upwards, while the second siphon oil nozzle 11 is arranged facing downwards 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 further improved embodiment, the first injection chamber 12 and the second injection chamber 13 are each composed of a venturi tube, and the corresponding venturi tube is connected to the upper cover 3. The narrowed diameter structure in the middle cavity of the venturi tube can be used to improve the ejection effect.
[0025] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A dual-ejector fuel pump assembly, comprising a fuel reservoir, a top cover, an upper cover, and a pump core, characterized in that: The upper cover is equipped with a dual oil nozzle and a nozzle assembly. The pump core is equipped with a main oil outlet and a secondary oil outlet. The main oil outlet is connected to the oil outlet of the top cover, and the secondary oil outlet is connected to the lower oil inlet of the dual oil nozzle. The nozzle assembly and the upper cover form a dual ejector oil suction structure. The dual ejector 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 dual oil nozzle. The lower end orifices of the first oil nozzle and the second oil nozzle are reduced in diameter, and the first oil nozzle and the second oil nozzle are respectively equipped with a first injection chamber and a second injection chamber. The first siphon oil nozzle and the second siphon oil nozzle are respectively connected to the first injection chamber and the second injection chamber. The first siphon oil nozzle is connected to the far front end of the oil tank through a first oil suction pipe, and the second siphon oil nozzle is connected to the far rear end of the oil tank through a second oil suction pipe.
2. The dual-ejector fuel pump assembly as described in claim 1, characterized in that: The lower ends of the first and second fuel injectors are respectively equipped with copper nozzles, and the diameter of the copper nozzles is 0.5mm.
3. The dual-ejector fuel pump assembly as described in claim 1, characterized in that: The top cover is adjustable and mounted on the oil storage tank. The top cover and the upper cover are respectively equipped with brackets, which are connected by pins. Support torsion springs are installed on the corresponding pins.
4. The dual ejector fuel pump assembly as described in claim 1, characterized in that: The dual oil nozzles and nozzle assembly are fixedly connected to the top cover by hot plate welding.
5. The dual ejector fuel pump assembly as described in claim 1, characterized in that: Both the first and second oil suction pipes are connected to a filter screen at their ends.
6. The dual-ejector fuel pump assembly as described in claim 1, characterized in that: The dual oil nozzles, the first oil nozzle, the second oil nozzle, and the first siphon oil nozzle are all arranged facing upwards, while the second siphon oil nozzle is arranged facing downwards and connected to the edge of the upper cover.
7. The dual ejector fuel pump assembly as described in claim 1, characterized in that: The first and second injection chambers are each composed of a venturi tube, and the corresponding venturi tubes are connected to the upper cover.