An automatic oil supply system
By utilizing the automatic fuel supply system and the coordinated operation of fuel level detection and delay triggering modules, the problem of frequent fuel equipment shutdowns during refueling has been solved, achieving automated and unattended fuel replenishment and improving the continuity and reliability of equipment operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING LIDONG TECHNOLOGY CO LTD
- Filing Date
- 2025-10-25
- Publication Date
- 2026-07-31
AI Technical Summary
In existing technologies, fuel equipment requires frequent shutdowns for manual refueling during continuous operation, which affects work efficiency and operational continuity.
An automatic fuel supply system is adopted, which works in concert with a fuel level detection device and a time-delay triggering module to intelligently determine the fuel consumption status and automatically complete the fuel replenishment operation. The system includes a fuel level detection device and a time-delay triggering module, which, together with a Hall sensor and a flow sensor, realizes automated fuel replenishment.
It enables unattended automatic oil replenishment, improves the continuous operation capability of the equipment, avoids frequent start-stop of the oil pump caused by equipment tilting or vibration, and simplifies the structure to reduce costs and failure rate.
Smart Images
Figure CN224579419U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of refueling equipment and relates to an automatic fuel supply system. Background Technology
[0002] For fuel-powered equipment (such as generators), operation depends on a continuous fuel supply. These devices typically have a limited-capacity fuel tank (like a generator tank). To improve the equipment's range, existing technologies employ an additional, large-capacity, portable external fuel tank and a small fuel pump to extend its range. The external fuel tank can be configured with different volumes to suit the equipment's range requirements. The operator must manually connect and start the fuel pump when the equipment's fuel tank is nearly empty to pump fuel from the external fuel tank into the equipment's fuel tank. The pump is manually turned off after the equipment's fuel tank is full or the external fuel tank is depleted.
[0003] However, during continuous operation, the fuel in the equipment's tank will be consumed rapidly, requiring frequent shutdowns and manual refueling, which seriously affects work efficiency and operational continuity. Utility Model Content
[0004] This invention addresses the shortcomings of existing technologies by providing an automatic fuel supply system that can intelligently determine fuel consumption status and automatically and smoothly complete fuel replenishment operations.
[0005] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution: An automatic fuel supply system includes a generator fuel tank, an external auxiliary fuel tank, a fuel pipeline, and a fuel pump. The fuel pump is connected to the fuel filler port of the generator fuel tank; the first interface of the fuel pipeline is connected to the fuel supply port of the external auxiliary fuel tank, and the second interface is connected to the fuel inlet of the fuel pump. The system further includes: The oil level detection device is installed inside the generator oil tank, and its detection end is only located at the high oil level setting position of the generator oil tank; The control device includes a main controller and an independent delay trigger module; The signal output terminal of the oil level detection device is electrically connected to the first input terminal of the main controller; the first output terminal of the main controller is electrically connected to the control terminal of the oil pump. The second output terminal of the main controller is electrically connected to the trigger terminal of the delay trigger module, and the signal output terminal of the delay trigger module is electrically connected to the second input terminal of the main controller.
[0006] In the aforementioned automatic oil supply system, the system further includes a flow channel detection device for detecting the flow state of oil in the pipeline, wherein the signal output terminal of the flow channel detection device is electrically connected to the third input terminal of the main controller; preferably, the flow channel detection device is a Hall effect flow sensor.
[0007] In the aforementioned automatic oil supply system, the oil level detection device includes a first Hall sensor and a second Hall sensor arranged side by side. The signal output terminals of the first Hall sensor and the second Hall sensor are electrically connected to two independent input terminals of the main controller, respectively. The first Hall sensor and the second Hall sensor can independently trigger the oil level signal.
[0008] In the aforementioned automatic fuel supply system, the delay trigger module can use a monostable trigger circuit composed of a 555 timer chip or other modules. The delay time of the delay trigger module is set to 25 to 35 minutes. The delay time is configured to match the fuel consumption rate of the equipment during operation.
[0009] This utility model can be adapted to various different external auxiliary fuel tanks: In the aforementioned automatic fuel supply system, the external auxiliary fuel tank is a large-capacity fuel tank, and the first interface is connected to an internal oil suction pipe extending downward to the bottom of the internal cavity of the external auxiliary fuel tank. The volume of the large-capacity fuel tank is 20-60L.
[0010] In the aforementioned automatic fuel supply system, the external auxiliary fuel tank is a small-capacity fuel tank, and the first interface is connected to an internal oil suction pipe that extends horizontally to the bottom of the inner cavity of the external auxiliary fuel tank. The volume of the small-capacity fuel tank is 5-20L.
[0011] In the aforementioned automatic oil supply system, the oil supply system can also be used for the equipment oil tanks of other equipment besides generators.
[0012] Compared with the prior art, this utility model has the following advantages: 1. This utility model provides an automatic fuel supply system that completely eliminates the need for manual refueling. Through the coordinated operation of a high fuel level detection module and a time-delay triggering module, the system can automatically and intelligently determine the continuous fuel consumption status and automatically complete the entire refueling process, achieving true unattended operation and greatly improving the equipment's continuous operation capability.
[0013] 2. This invention introduces an independent delay trigger module as a hardware structure. When the system detects that the oil level has fallen below the high oil level, it does not immediately start the oil pump. Instead, it waits a reasonable delay to confirm whether fuel consumption is continuous. This mechanism effectively filters out brief fluctuations in the oil level caused by equipment tilting or vibration, fundamentally preventing frequent start-stop of the oil pump and making the automation process more stable and reliable.
[0014] 3. This utility model adopts a solution of "setting the detection device only at high oil levels," eliminating the need for a low oil level sensor, simplifying the structure, and reducing costs and failure rates. The high oil level sensor employs a dual Hall effect sensor redundancy design, further improving the reliability of the automatic shutdown function. Attached Figure Description
[0015] Figure 1 This is a perspective view of Embodiment 1 of this utility model; Figure 2 This is a perspective view of Embodiment 2 of this utility model; Attached reference numerals: 1. Generator fuel tank; 2. External auxiliary fuel tank; 3. Fuel pipeline; 31. First interface; 32. Second interface; 4. Oil pump. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-2 : Example 1 An automatic fuel supply system includes a generator fuel tank 1, an external auxiliary fuel tank 2, a fuel pipeline 3, and a fuel pump 4. The fuel pump 4 is connected to the fuel inlet of the generator fuel tank 1; the first port 31 of the fuel pipeline 3 is connected to the fuel supply port of the external auxiliary fuel tank 2, and the second port 32 is connected to the fuel inlet of the fuel pump 4. The system further includes: An oil level detection device is installed inside the generator oil tank 1, with its detection end located only at the high oil level setting position of the generator oil tank 1; preferably, the oil level detection device includes a first Hall sensor and a second Hall sensor arranged side by side, and the signal output ends of the first Hall sensor and the second Hall sensor are electrically connected to two independent input ends of the main controller respectively; the first Hall sensor and the second Hall sensor can independently trigger the oil level signal: when the magnetic float rises with the oil level to the high oil level, it will trigger one or both Hall sensors, and the sensor will generate a signal and send it to the main controller; The control device includes a main controller and an independent delay trigger module. The main controller can be a microcontroller unit (MCU), a programmable logic controller (PLC), or an integrated circuit with logic processing capabilities, which are conventional in the art. The flow channel detection device is used to detect the flow status of oil in the pipeline. Preferably, the flow channel detection device is a Hall effect flow sensor. If the sensor does not detect oil flow within a set time, the main controller can automatically determine that there is a fault (such as insufficient oil in the external auxiliary oil tank 2 or pipeline blockage) and execute automatic shutdown and alarm to avoid damage to the oil pump 4 due to dry running. The signal output terminal of the oil level detection device is electrically connected to the first input terminal of the main controller; the first output terminal of the main controller is electrically connected to the control terminal of the oil pump 4. The second output terminal of the main controller is electrically connected to the trigger terminal of the delay trigger module, and the signal output terminal of the delay trigger module is electrically connected to the second input terminal of the main controller. The signal output terminal of the flow channel detection device is electrically connected to the third input terminal of the main controller.
[0017] The working process of the above-mentioned automatic oil supply system is as follows: In the initial state, the system is powered on, the generator oil tank 1 is at a high oil level, and the oil pump 4 is not working.
[0018] During operation, the equipment consumes fuel, the oil level in generator tank 1 drops, the magnetic float moves away from the high oil level, and the oil level detection device stops sending high oil level signals to the main controller.
[0019] Intelligent delay judgment: After the main controller detects that the oil level has dropped from the high oil level, it immediately sends a trigger signal to the delay trigger module. Subsequently, the delay trigger module independently performs hardware timing, for example, for 30 minutes.
[0020] Automatic fuel replenishment: After the delay trigger module completes the 30-minute delay, it will automatically output a transition level (such as transitioning from low level to high level) to its signal output terminal. After detecting this "delay end" signal, the main controller will immediately drive the fuel pump 4 to start, and begin automatically pumping fuel from the external auxiliary fuel tank 2 to the generator fuel tank 1.
[0021] The system automatically stops, and oil pump 4 continues to operate until the oil level in generator oil tank 1 rises back to the high level. The oil level detection device then sends a signal again, and the main controller immediately stops oil pump 4. The system completes one automatic oil replenishment cycle and waits for the next oil level drop.
[0022] Comparison Appendix Figure 1 In this embodiment, the external auxiliary fuel tank 2 is a large-capacity fuel tank (specifically a 53L external auxiliary fuel tank), and the first interface 31 is connected to a built-in oil suction pipe that extends downward to the bottom of the inner cavity of the external auxiliary fuel tank 2.
[0023] Example 2 Comparison Appendix Figure 2 In this embodiment, the external auxiliary fuel tank 2 is a small-capacity fuel tank (specifically, an 18L external auxiliary fuel tank), and the first interface 31 is connected to an internal oil suction pipe that extends horizontally to the bottom of the inner cavity of the external auxiliary fuel tank 2.
[0024] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.
Claims
1. An automatic oil supply system comprising a generator oil tank (1), an external sub-tank (2), an oil supply line (3), and an oil pump (4), characterized in that, The oil pump (4) is connected to the oil filling port of the generator oil tank (1). The first interface (31) of the oil pipeline (3) is connected to the oil supply port of the external auxiliary oil tank (2), and the second interface (32) is connected to the oil inlet of the oil pump (4). The system also includes: The oil level detection device is installed inside the generator oil tank (1), and its detection end is only located at the high oil level setting position of the generator oil tank (1); The control device includes a main controller and an independent delay trigger module; The signal output terminal of the oil level detection device is electrically connected to the first input terminal of the main controller; the first output terminal of the main controller is electrically connected to the control terminal of the oil pump (4); The second output terminal of the main controller is electrically connected to the trigger terminal of the delay trigger module, and the signal output terminal of the delay trigger module is electrically connected to the second input terminal of the main controller.
2. An automatic oil supply system according to claim 1, characterized in that The system also includes a flow channel detection device for detecting the flow state of oil in the pipeline, and the signal output terminal of the flow channel detection device is electrically connected to the third input terminal of the main controller.
3. An automatic oil feeding system according to claim 1, characterized in that The oil level detection device includes a first Hall sensor and a second Hall sensor arranged side by side, and the signal output terminals of the first Hall sensor and the second Hall sensor are electrically connected to two independent input terminals of the main controller, respectively.
4. An automatic oil supply system according to claim 2, wherein The flow channel detection device is a Hall effect flow sensor.
5. An automatic oil feeding system according to claim 1, characterized in that The delay time of the delay trigger module is set to 25 to 35 minutes.
6. An automatic oil feeding system according to claim 1, characterized in that The external auxiliary fuel tank (2) is a large-capacity fuel tank with a volume of 20-60L.
7. An automatic oil feeding system according to claim 1, characterized in that The external auxiliary fuel tank (2) is a small-capacity fuel tank with a volume of 5-20L.