A vehicle intelligent oil guiding system and its control method

Abstract

This invention discloses a vehicle intelligent oil guiding system, comprising: an oil tank, including an oil tank 1 and an oil tank 2, wherein an oil level sensor 1 and an oil level sensor 2 are respectively installed in the oil tank 1 and oil tank 2; an oil guiding line, including an oil pump motor, an oil guiding pipe, and an oil guiding pipe check valve, wherein the oil pump motor is located in the oil tank 2, the oil guiding pipe is connected to the oil pump motor and connects the oil tank 1 and oil tank 2, and the oil guiding pipe is equipped with an oil guiding pipe check valve, which controls the oil to flow only from the oil tank 1 to the oil tank 2; and a controller, which is connected to the oil pump motor, the oil level sensor 1, and the oil level sensor 2, wherein the controller controls the start and stop of the oil pump motor, and the controller collects the oil level signals from the oil level sensors 1 and 2. This invention also discloses a control method for the vehicle intelligent oil guiding system. This invention is easy to install, has high compatibility, long lifespan, high precision, and wide application range.

Description

Technical Field

[0001] This invention relates to the field of commercial vehicle fuel technology. More specifically, this invention relates to an intelligent fuel guiding system for vehicles and its control method. Background Technology

[0002] Traditional commercial vehicles, due to their long-distance operation, have high fuel requirements. Therefore, they are equipped with two fuel tanks, one large and one small, before leaving the factory. When the fuel in one tank is about to run out, the engine's power supply is switched to the other tank by changing the valves and fuel lines to ensure fuel consumption. This requires adding various three-way valves, switching valves and pipelines to the chassis. Some vehicles still use manual switching, which is complicated and cumbersome. Summary of the Invention

[0003] One objective of this invention is to provide a vehicle intelligent oil guiding system and its control method, which is easy to install, highly compatible, has a long lifespan, high precision, and a wide range of applications.

[0004] To achieve these objectives and other advantages according to the present invention, a vehicle intelligent oil guiding system is provided, comprising:

[0005] The oil tank includes oil tank No. 1 and oil tank No. 2, and oil tank No. 1 and oil tank No. 2 are respectively equipped with liquid level sensor No. 1 and liquid level sensor No. 2;

[0006] The oil guiding line includes an oil pump motor, an oil guiding pipe, and an oil guiding pipe check valve. The oil pump motor is located in oil tank No. 2. The oil guiding pipe is connected to the oil pump motor and connects oil tank No. 1 and oil tank No. 2. An oil guiding pipe check valve is installed on the oil guiding pipe, which controls the oil to flow only from oil tank No. 1 to oil tank No. 2.

[0007] The controller is connected to the oil pump motor, level sensor 1, and level sensor 2 respectively. The controller controls the start and stop of the oil pump motor and collects the level signals from level sensors 1 and 2.

[0008] Preferably, it also includes a fuel supply line, which includes a suction pipe, a supply pipe and a return pipe. The suction pipe is connected to a No. 2 fuel tank, and the return pipe is also connected to a No. 2 fuel tank. The supply pipe is connected to the suction pipe and the return pipe, and both are connected to the engine to form a fuel circuit. A one-way valve for the suction pipe is provided on the suction pipe.

[0009] Preferably, it also includes an exhaust line, which includes a switch valve and an exhaust pipe. The two ends of the exhaust pipe are respectively connected to the oil guide pipe and the oil supply pipe. One end of the exhaust pipe connected to the oil guide pipe is located between the oil guide pipe check valve and the oil pump motor. The switch valve is installed on the exhaust pipe and is connected to the controller and controlled to open and close by the controller.

[0010] Preferably, the coarse filter is not equipped with an exhaust pump.

[0011] The present invention also provides a control method for a vehicle intelligent oil guiding system, comprising the following steps:

[0012] Step 1: Set the upper and lower threshold values ​​for oil tanks 1 and 2 respectively in the controller;

[0013] Step 2: The controller collects the liquid level signals from the No. 1 liquid level sensor and the No. 2 liquid level sensor installed in No. 1 and No. 2 oil tanks respectively;

[0014] Step 3: The controller compares the level signals from level sensors 1 and 2 with the set thresholds for fuel tanks 1 and 2. When the level in fuel tank 2 is below its set lower threshold and the level in fuel tank 1 is above its set lower threshold, the switch valve closes, the controller starts the fuel pump motor, and automatic fuel transfer begins, with fuel from fuel tank 1 being transferred to fuel tank 2 via the fuel pipe. When the level in fuel tank 2 is above its set upper threshold or the level in fuel tank 1 is below a set lower threshold, automatic fuel transfer ends, and the controller stops the fuel pump motor. When the levels in both fuel tanks are below their set lower thresholds, the controller activates its internal alarm module to issue an alarm, prompting the driver to refuel.

[0015] Preferably, before step one, a self-test of the controller's function is included, which is used to monitor whether the controller is monitoring normally. After the self-test is completed, an exhaust and oil replenishment operation is performed. Specifically, the controller controls the oil pump motor to turn on and the switch valve to open. The oil in oil tank No. 1 flows through the oil guide pipe to the switch valve and then to the oil supply pipe, and then flows through the coarse filter to realize exhaust and oil replenishment.

[0016] Preferably, during the exhaust and oil replenishment operation, the current of the oil pump motor is linearly related to the pressure in the oil pipe. The controller monitors the current signal of the oil pump motor during operation to determine the pressure of the coarse filter during the exhaust and oil replenishment process. The pressure of the coarse filter is fed back to determine its pressure level. Based on the set pressure range of the coarse filter, the oil flow of the oil pump motor is adjusted to ensure that the pressure level of the coarse filter meets the set requirements.

[0017] Preferably, the controller is also equipped with a fault-prevention mechanism. Specifically, the pressure in the oil pipe is linearly related to the current when the oil pump motor is working. By periodically monitoring the current signal when the oil pump motor is working, the pressure of the fuel in the oil pipe can be determined. The controller can detect oil pipe blockage, detachment, or cracking during the operation of the oil pump by identifying the pressure in the oil pipe. When an abnormality occurs, the controller controls the alarm module installed inside to issue a warning signal, prompting the driver to stop and check the corresponding oil pipe and oil circuit.

[0018] Preferably, the controller adopts a PID control mode during the oil guiding process. It establishes a functional relationship between the driver's accelerator pedal signal and engine speed signal and the oil pump motor's oil guiding flow rate. At the same time, it performs basic proportional control through Kp, eliminates steady-state error through Ki integral control, and suppresses error by improving the system response speed and reducing the lag rate through Kd derivative control. When the driver presses the accelerator pedal hard, the oil pump motor speed increases instantaneously, and vice versa.

[0019] Preferably, the controller employs a dual software filtering method, namely median filtering and second-order filtering, to remove glitches and jitters in the liquid level sensor signal when acquiring the signal. This enables the controller to make more accurate judgments on the opening and closing of the oil pump motor and the switching valve.

[0020] The present invention has at least the following beneficial effects:

[0021] 1. This invention uses a liquid level sensor combined with an automatic controller to establish information interaction between the fuel level in the tank and the system controller, accurately guiding the timing of fuel delivery and shutdown, and realizing the switching between the two functions of the system. No manual operation is required, making the control more precise and convenient.

[0022] 2. Compared with the traditional manual operation control system, the control system of the present invention simplifies the complex and diverse oil pipes and valves installed on the vehicle in the traditional system, reduces costs, and has high control precision.

[0023] 3. The system of the present invention is easy to install, has a high degree of compatibility, a long lifespan, high precision, and a wide range of applications.

[0024] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure under the oil guiding mode of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure under the exhaust oil replenishment mode of the present invention. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0028] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified. In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] like Figure 1 and Figure 2 As shown, the present invention provides a vehicle intelligent oil guiding system, comprising:

[0030] The oil tank includes oil tank No. 1 and oil tank No. 2, and oil tank No. 1 and oil tank No. 2 are respectively equipped with liquid level sensor No. 1 and liquid level sensor No. 2;

[0031] The oil guiding line includes an oil pump motor, an oil guiding pipe, and an oil guiding pipe check valve. The oil pump motor is located in oil tank No. 2. The oil guiding pipe is connected to the oil pump motor and connects oil tank No. 1 and oil tank No. 2. An oil guiding pipe check valve is installed on the oil guiding pipe, which controls the oil to flow only from oil tank No. 1 to oil tank No. 2.

[0032] The controller is connected to the oil pump motor, level sensor 1, and level sensor 2 respectively. The controller controls the start and stop of the oil pump motor and collects the level signals from level sensors 1 and 2.

[0033] In the above technical solution, a level sensor is installed in the fuel tank to measure the fuel level and interact with the controller module, thereby precisely guiding the timing of fuel transfer and shutdown, achieving automatic fuel transfer control without manual operation. The built-in level sensor identifies the fuel level in fuel tank 2 and simultaneously collects the fuel level in fuel tank 1. When the fuel levels in both tanks meet the fuel transfer initiation conditions, the controller drives the fuel pump motor to transfer fuel from tank 1 to tank 2. When the fuel levels in both tanks meet the fuel transfer exit conditions, the controller stops the fuel pump motor, ending the fuel transfer function. Simultaneously, after the vehicle is powered on, the controller periodically checks the fuel levels in tanks 1 and 2. If both tanks are below a set threshold, the system issues an alarm signal to prompt the driver to refuel. The oil pump motor uses a high-performance brushless motor. Its advantages lie in the smoother and more efficient operation after eliminating the brushes, reducing friction and electrical losses, resulting in lower overall motor losses, lower temperature rise, continuously adjustable speed, a wide operating temperature range, and the ability to handle large flow rates and high dust emissions. Simultaneously, the motor features multiple overcurrent, over / undervoltage, and self-check protections to ensure reliability, making it suitable for various vehicle models and operating conditions. The one-way valve on the oil guide pipe is designed to prevent fuel backflow during the oil guiding process.

[0034] In another technical solution, a fuel supply line is also included, comprising a suction pipe, a supply pipe, and a return pipe. The suction pipe connects to a second fuel tank, and the return pipe also connects to a second fuel tank. The supply pipe, along with the suction pipe and the return pipe, are connected to the engine to form a fuel circuit. A one-way valve is installed on the suction pipe. The fuel supply route is a conventional fuel route. The one-way valve prevents fuel backflow during exhaust fuel replenishment and ensures that fuel does not flow back to the other fuel tank.

[0035] In another technical solution, an exhaust line is also included, which includes a switch valve and an exhaust pipe. The two ends of the exhaust pipe are respectively connected to the oil guide pipe and the oil supply pipe. One end of the exhaust pipe connected to the oil guide pipe is located between the oil guide pipe check valve and the oil pump motor. The switch valve is installed on the exhaust pipe and is connected to the controller and controlled to open and close by the controller.

[0036] In the above technical solution, a switching valve is integrated on the exhaust pipe, which is driven to open and close by a controller. This, combined with the use of a fuel pump motor, alters the fuel flow path. When the switching valve is open, as... Figure 2 As shown, the system is in exhaust oil replenishment mode. When the switch valve is closed, as... Figure 1 As shown, the system operates in oil guiding mode, thus realizing two different functions of the system.

[0037] In another technical solution, no exhaust electric pump is installed on the coarse filter.

[0038] The present invention also provides a control method for the above-mentioned intelligent oil guiding system for vehicles, as detailed below:

[0039] 1. Controller self-test: This function monitors whether the controller is functioning correctly. The system is powered by the vehicle's IGN ON switch. After power-on, the control module completes its self-test and then prioritizes a short-duration exhaust fuel replenishment function.

[0040] II. Exhaust Fuel Replenishment Mode: The controller activates the fuel pump motor, opening the switch valve. The fuel pump motor changes the fuel path and simultaneously drives itself to pump fuel upwards. Fuel is drawn through the supply pipe to the coarse filter. Simultaneously, by identifying the pressure information fed back from the fuel pump, the current pressure range of the coarse filter is determined, and the fuel pump motor flow rate is adjusted. This ensures the pressure level of the coarse filter during exhaust fuel replenishment. This method can completely eliminate the need for the original exhaust electric pump for the coarse filter on the vehicle. Specifically: the current of the fuel pump motor during operation has a linear relationship with the pressure in the fuel line. The controller monitors the current signal of the fuel pump motor during operation to determine the pressure of the coarse filter during exhaust fuel replenishment. Feedback on the pressure level of the coarse filter is used to determine its pressure level. Based on the set pressure range of the coarse filter, the fuel pump motor's fuel flow rate is adjusted to ensure the pressure level of the coarse filter meets the set requirements.

[0041] III. Oil guiding mode: This includes the following steps:

[0042] Step 1: Set the upper and lower threshold values ​​for oil tanks 1 and 2 respectively in the controller;

[0043] Step 2: The controller collects the liquid level signals from the No. 1 liquid level sensor and the No. 2 liquid level sensor installed in No. 1 and No. 2 oil tanks respectively;

[0044] Step 3: The controller compares the level signals from level sensors 1 and 2 with the set thresholds for fuel tanks 1 and 2. When the level in fuel tank 2 is below its set lower threshold and the level in fuel tank 1 is above its set lower threshold, the switch valve closes, the controller starts the fuel pump motor, and automatic fuel transfer begins, with fuel from fuel tank 1 being transferred to fuel tank 2 via the fuel pipe. When the level in fuel tank 2 is above its set upper threshold or the level in fuel tank 1 is below a set lower threshold, automatic fuel transfer ends, and the controller stops the fuel pump motor. When the levels in both fuel tanks are below their set lower thresholds, the controller activates its internal alarm module to issue an alarm, prompting the driver to refuel.

[0045] IV. Error Prevention Mechanism: The system is equipped with a powerful error prevention mechanism. The pressure in the oil pipe is linearly related to the current when the oil pump motor is working. Therefore, by periodically monitoring the current signal when the oil pump motor is working, the pressure of the fuel in the oil pipe can be determined. The control module identifies the pressure in the oil pipe and thus detects whether the oil pipe is blocked, detached, or cracked during the operation of the oil pump. When an abnormality occurs, the controller controls the alarm module set inside to issue a warning signal, prompting the driver to stop and check the corresponding oil pipe and oil circuit.

[0046] V. Optimization Mechanism 1: The controller module employs a PID control mode during the oil pump motor's oil delivery process. It establishes a functional relationship between the driver's accelerator pedal signal and engine speed signal and the oil pump's oil flow rate. Simultaneously, it uses Kp for basic proportional control, Ki for integral control to eliminate steady-state error, and Kd for derivative control to improve system response speed and reduce lag, thereby suppressing errors. When the driver sharply depresses the accelerator pedal, the oil pump speed instantaneously increases, and vice versa. This ensures that the oil pump motor maintains an optimal state throughout the entire operation process based on the driver's vehicle control.

[0047] VI. Optimization Mechanism 2: The system uses the liquid level signals of oil tanks 1 and 2 as input conditions. However, due to factors such as vibration during vehicle operation, the liquid level information will fluctuate slightly and frequently. This will affect the activation and deactivation of the control strategy. To address this issue, the control module uses a dual software filtering method of median filtering and second-order filtering to remove glitches and jitters in the liquid level signal when collecting the liquid level signal. This allows the control module to more accurately determine the activation and deactivation of the function mode.

[0048] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A vehicle intelligent oil guiding system, characterized in that, include: The oil tank includes oil tank No. 1 and oil tank No. 2, and oil tank No. 1 and oil tank No. 2 are respectively equipped with liquid level sensor No. 1 and liquid level sensor No. 2; The oil guiding line includes an oil pump motor, an oil guiding pipe, and an oil guiding pipe check valve. The oil pump motor is located in oil tank No.

2. The oil guiding pipe is connected to the oil pump motor and connects oil tank No. 1 and oil tank No.

2. An oil guiding pipe check valve is installed on the oil guiding pipe, which controls the oil to flow only from oil tank No. 1 to oil tank No.

2. The controller is connected to the oil pump motor, level sensor 1 and level sensor 2 respectively. The controller controls the start and stop of the oil pump motor and collects the level signals of level sensors 1 and 2. It also includes a fuel supply line, which includes a suction pipe, a supply pipe and a return pipe. The suction pipe is connected to fuel tank No. 2, and the return pipe is also connected to fuel tank No.

2. The supply pipe is connected to the suction pipe and the return pipe and is connected to the engine to form a fuel circuit. A one-way valve for the suction pipe is provided on the suction pipe. It also includes an exhaust line, which includes a switch valve and an exhaust pipe. The two ends of the exhaust pipe are respectively connected to the oil guide pipe and the oil supply pipe. One end of the exhaust pipe connected to the oil guide pipe is located between the oil guide pipe check valve and the oil pump motor. The switch valve is installed on the exhaust pipe and is connected to the controller and controlled to open and close by the controller.

2. The vehicle intelligent oil guiding system as described in claim 1, characterized in that, No exhaust pump is installed on the coarse filter.

3. A control method for a vehicle intelligent oil guiding system as described in claim 1, characterized in that, Includes the following steps: Step 1: Set the upper and lower threshold values ​​for oil tanks 1 and 2 respectively in the controller; Step 2: The controller collects the liquid level signals from the No. 1 liquid level sensor and the No. 2 liquid level sensor installed in No. 1 and No. 2 oil tanks respectively; Step 3: The controller compares the level signals from level sensors 1 and 2 with the set thresholds for fuel tanks 1 and 2. When the level in fuel tank 2 is below its set lower threshold and the level in fuel tank 1 is above its set lower threshold, the switch valve closes, the controller starts the fuel pump motor, and automatic fuel transfer begins, with fuel from fuel tank 1 being transferred to fuel tank 2 via the fuel pipe. When the level in fuel tank 2 is above its set upper threshold or the level in fuel tank 1 is below a set lower threshold, automatic fuel transfer ends, and the controller stops the fuel pump motor. When the levels in both fuel tanks are below their set lower thresholds, the controller activates its internal alarm module to issue an alarm, prompting the driver to refuel.

4. The control method for the vehicle intelligent oil guiding system as described in claim 3, characterized in that, Before step one, there is also a function self-test of the controller, which is used to monitor whether the controller is monitoring normally. After the self-test is completed, the exhaust and oil replenishment operation is performed. Specifically, the controller controls the oil pump motor to turn on, the switch valve to open, the oil in oil tank No. 1 flows through the oil guide pipe to the switch valve and then to the oil supply pipe, and then flows through the coarse filter to realize exhaust and oil replenishment.

5. The control method for the vehicle intelligent oil guiding system as described in claim 4, characterized in that, During the exhaust and oil replenishment operation, the current of the oil pump motor is linearly related to the pressure in the oil pipe. The controller monitors the current signal of the oil pump motor to determine the pressure of the coarse filter during the exhaust and oil replenishment process. The pressure of the coarse filter is fed back to determine its pressure level. Based on the set pressure range of the coarse filter, the oil flow of the oil pump motor is adjusted to ensure that the pressure level of the coarse filter meets the set requirements.

6. The control method for the vehicle intelligent oil guiding system as described in claim 4, characterized in that, The controller is also equipped with a fault-prevention mechanism. Specifically, the pressure in the fuel line is linearly related to the current of the fuel pump motor. By periodically monitoring the current signal of the fuel pump motor, the pressure of the fuel in the fuel line can be determined. The controller can detect fuel line blockage, detachment, or cracking during operation by identifying the pressure in the fuel line. When an abnormality occurs, the controller activates its internal alarm module to issue a warning signal, prompting the driver to stop and check the corresponding fuel line and fuel circuit.

7. The control method for the vehicle intelligent oil guiding system as described in claim 4, characterized in that, The controller employs a PID control mode during the oil guiding process. It establishes a functional relationship between the driver's accelerator pedal signal and engine speed signal and the oil pump motor's oil guiding flow rate. Simultaneously, it performs basic proportional control through Kp, eliminates steady-state error through Ki integral control, and suppresses error by improving system response speed and reducing lag rate through Kd derivative control. When the driver presses the accelerator pedal hard, the oil pump motor speed increases instantaneously, and vice versa.

8. The control method for the vehicle intelligent oil guiding system as described in claim 4, characterized in that, When acquiring liquid level sensor signals, the controller employs a dual software filtering method, namely median filtering and second-order filtering, to remove glitches and jitters in the liquid level sensor signals. This enables the controller to make more accurate judgments on the opening and closing of the oil pump motor and the switching valve.

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