Motorcycle instrument with liquid crystal screen

Abstract

The utility model provides a motorcycle instrument with a liquid crystal screen, the motorcycle instrument comprises an MCU chip, a liquid crystal driving chip and a blue-bottom negative display liquid crystal board, the MCU chip is connected with the liquid crystal driving chip through a resistor array R1, and the liquid crystal driving chip is connected with the blue-bottom negative display liquid crystal board; the MCU chip is connected with a signal acquisition module, an alarm module, a signal module, an acquisition module, a program write-in module, a signal module and a quiescent current control module, and the MCU chip is connected with the CAN circuit. Through the connection of the module circuits and the high integration level of the motorcycle instrument, more functions can be integrated on the instrument, so that a driver can better know the condition of the motorcycle; the expansibility is high, and the device can be changed or expanded according to different configurations of the motorcycle; the instrument also supports an intelligent function so as to enhance the safety in the driving process.

Description

Technical Field

[0001] The utility model relates to the field of motorcycle instruments, in particular to a motorcycle instrument with a blue background negative display liquid crystal screen. Background Art

[0002] In the design and manufacture of motorcycles, as an important information interaction interface between riders and vehicles, the diversity and integration of the functions of the instrument panel directly affect the safety and convenience of the riding experience. Traditional motorcycle instruments usually adopt mechanical or single electronic display technology, mainly providing basic information such as driving speed, engine speed, fuel level, etc. Although this design can meet basic needs, with the development of technology and the improvement of user requirements, single-function instruments have become difficult to adapt to the intelligent trend of modern motorcycles. In recent years, with the rapid development of MCU technology, the functions of motorcycle instruments have gradually become integrated, capable of simultaneously displaying multiple pieces of information and providing multiple functions. For example, through the integration of the MCU, motorcycle instruments can not only monitor and display speed, engine speed, and fuel level in real time, but also add intelligent functions such as navigation, Bluetooth connection, fault diagnosis, and driving record. This integrated design enables riders to obtain comprehensive information on one interface, reducing the risk of distraction and improving riding safety. In addition, the MCU has powerful data processing capabilities, can analyze and process data from different sensors in real time, and make dynamic adjustments according to the riding state. This intelligent feedback mechanism not only enhances the user experience but also provides a basis for the safety and performance optimization of motorcycles. Content of the Utility Model

[0003] The technical problems solved by the utility model are as follows: In the existing technology, there are problems with the expandability, display function, maintenance cost, and safety of many motorcycle instruments. The motorcycle instrument controlled by the MCU chip can integrate different functions into the MCU chip, enabling the driver to better understand the information of the motorcycle and expand functions according to different configurations of the motorcycle. Moreover, the MCU chip integrating several functions can self-monitor and diagnose faults, detect system anomalies in a timely manner, help maintenance personnel quickly locate problems, reduce maintenance costs, and the MCU chip supports the implementation of intelligent functions such as ABS (Anti-lock Braking System), which can enhance riding safety.

[0004] To solve the above problems, the technical solution adopted by the utility model is as follows:

[0005] The motorcycle instrument includes an MCU chip, a liquid crystal driver chip, and a blue-background negative display liquid crystal panel; the MCU chip is connected to the liquid crystal driver chip through a resistor array R1, and the liquid crystal driver chip is connected to a liquid crystal panel; a signal acquisition module and an alarm module are connected to the MCU chip, a signal module and an acquisition module are connected to the MCU chip, a program writing module, a signal module, and a static current control module are connected to the MCU chip, and the MCU chip is connected to a CAN circuit; the liquid crystal driver chip is connected to the blue-background negative display liquid crystal panel.

[0006] Preferably, the connection mode between the MCU chip and the liquid crystal driver chip is that the I2C_SDA pin and the I2C_SCL pin of the MCU chip are connected to the resistor array R1, and the I2C_SDA2 pin and the I2C_SCL2 pin of the liquid crystal driver chip are connected to the resistor array R1, so that the MCU chip is connected to the liquid crystal driver chip through the resistor array R1.

[0007] Preferably, the signal acquisition module includes an oil quantity signal acquisition module and a water temperature acquisition module.

[0008] Preferably, the COM series pins and the SEG series pins of the liquid crystal driver chip are connected to the blue-background negative display liquid crystal panel.

[0009] Preferably, the alarm module includes an oil pressure alarm module, and the oil pressure alarm module can output an oil alarm signal when the oil pressure reaches a certain value to protect the safety of the rider to a certain extent.

[0010] Preferably, the signal acquisition module includes a water temperature signal acquisition module and an oil quantity signal acquisition module, and the signal module includes a P signal module and a turn signal module.

[0011] Preferably, the OTS_IN pin of the MCU chip is connected to the oil pressure alarm module.

[0012] Preferably, the P_IN pin of the MCU chip is connected to the P signal module; the CLL_IN pin, the HB_IN pin, the R_TURN_IN pin, and the L_TURN_IN pin of the MCU are connected to the turn signal module.

[0013] Preferably, the CAN_STBY pin, the CAN_TX pin, and the CAN_RX pin of the MCU chip are connected to the CAN circuit.

[0014] Preferably, the FUEL pin of the MCU chip is connected to the oil quantity acquisition signal module, and the TEMP_ADC pin of the MCU chip is connected to the water temperature acquisition module.

[0015] The beneficial effects of the present utility model are as follows: The liquid crystal instrument has rich display functions and can display information such as vehicle speed, fuel level, water temperature, and engine speed through different modes. Moreover, it can also display more intuitive information such as fuel economy and speed trend charts, improving the driver's control ability of the vehicle. The liquid crystal instrument adopts digital display, with higher display accuracy and readability. In addition, the liquid crystal instrument is not restricted by mechanical structures and can accurately display any value, effectively avoiding problems such as pointer jitter caused by wear of mechanical instruments. The blue background negative display liquid crystal screen has better visual effects and higher clarity under sunlight. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the liquid crystal driving chip of the present utility model.

[0017] Figure 2 It is the blue background negative display liquid crystal panel of the present utility model.

[0018] Figure 3 It is a schematic diagram of the MCU chip of the present utility model.

[0019] Figure 4 It is a circuit diagram of the present utility model.

[0020] Figure 5 It is a circuit diagram of the present utility model.

[0021] Figure 6 It is a circuit diagram of the present utility model.

[0022] Figure 7 It is a circuit diagram of the ambient light detection module of the present utility model.

[0023] Figure 8 It is a circuit diagram of the static current control module of the present utility model.

[0024] Figure 9 It is a schematic diagram of a resistor array of the present utility model. Detailed Embodiments

[0025] In order to more clearly and comprehensively illustrate the technical solution of the present utility model so that readers can fully understand its innovative points and application value, in the following part, through some specific embodiments, the above-mentioned technical features will be described and explained in detail. These embodiments will show the specific performance of the technical solution in practical applications, including its operation process, function realization, and various situations that may be encountered. Through these detailed descriptions.

[0026] The model number of the MCU chip is HC32L072JATA. Some pins of the MCU chip are connected to the static current control module, some pins of the MCU chip are connected to the oil pressure alarm module, the MCU chip is connected to the turn signal module, some pins of the MCU chip are connected to the ABS fault detection module, some pins of the MCU chip are connected to the engine fault signal detection module, some pins of the MCU chip are connected to the automatic start-stop module, some pins of the MCU chip are connected to the ambient light detection module, some pins of the MCU chip are connected to the fuel quantity acquisition module, some pins of the MCU chip are connected to the CAN circuit, some pins of the MCU chip are connected to the program writing module, some pins of the MCU chip are connected to the P signal module, some pins of the MCU chip are connected to the water temperature signal acquisition module, and some pins of the MCU chip are connected to the switch module. Some pins of the MCU chip are connected to the liquid crystal driver chip. The model number of the liquid crystal driver chip is TM1729_LQFP64, and the liquid crystal driver chip is connected to the blue background negative display liquid crystal.

[0027] As Figure 1 shown in the schematic diagram of the liquid crystal driver chip of the present utility model and Figure 2 the schematic diagram of the blue background negative display liquid crystal panel of the present utility model shown. It can be seen from the figure that the liquid crystal driver chip is provided with several pins, namely SEG series pins, COM series pins, VLCD pin, VDD pin, GND pin, TESTI pin, OSCIO pin, and I2C_SCL2 and I2C_SDA2 pins. The I2C_SCL2 pin and I2C_SDA2 pin of the liquid crystal driver chip are connected to the I2C_SCL2 pin and I2C_SDA2 pin of the resistor array R1. The MCU chip is connected to the I2C_SCL pin and I2C_SDA pin of the resistor array R1, so that the liquid crystal driver chip is connected to the MCU chip through the resistor array R1. The VLCD pin of the liquid crystal driver chip is connected to the resistor R9 of the model R0603, and the unconnected section of the resistor R9 from the VLCD pin is grounded for protection. The VDD pin of the liquid crystal driver chip is connected to the second end of the capacitor C22, the GND pin of the liquid crystal driver chip is connected to the first end of the capacitor C22, the OSCIO pin of the liquid crystal driver chip is grounded for protection, and the TEST1 pin of the liquid crystal driver chip is connected to the first end of the capacitor C22 and the OSCIO pin of the liquid crystal driver chip; in addition, the liquid crystal driver chip is also connected to the blue background negative display liquid crystal panel, and the specific connection method is as follows:

[0028] The COM0 pin of the liquid crystal panel is connected to the COM0 of the blue background negative display liquid crystal panel; the COM1 pin of the liquid crystal panel is connected to the COM1 of the blue background negative display liquid crystal panel; the COM2 pin of the liquid crystal panel is connected to the COM2 of the blue background negative display liquid crystal panel; the COM3 pin of the liquid crystal panel is connected to the COM3 of the blue background negative display liquid crystal panel; the SEG0 pin of the liquid crystal panel is connected to the SEG0 of the blue background negative display liquid crystal panel; the SEG1 pin of the liquid crystal panel is connected to the SEG1 of the blue background negative display liquid crystal panel; the SEG2 pin of the liquid crystal panel is connected to the SEG2 of the blue background negative display liquid crystal panel; the SEG4 pin of the liquid crystal panel is connected to the SEG4 of the blue background negative display liquid crystal panel; the SEG5 pin of the liquid crystal panel is connected to the SEG5 of the blue background negative display liquid crystal panel; the SEG6 pin of the liquid crystal panel is connected to the SEG6 of the blue background negative display liquid crystal panel; the SEG7 pin of the liquid crystal panel is connected to the SEG7 of the blue background negative display liquid crystal panel; the SEG8 pin of the liquid crystal panel is connected to the SEG8 of the blue background negative display liquid crystal panel; the SEG9 pin of the liquid crystal panel is connected to the SEG9 of the blue background negative display liquid crystal panel; the SEG10 pin of the liquid crystal panel is connected to the SEG10 of the blue background negative display liquid crystal panel; the SEG11 pin of the liquid crystal panel is connected to the SEG11 of the blue background negative display liquid crystal panel; the SEG12 pin of the liquid crystal panel is connected to the SEG12 of the blue background negative display liquid crystal panel; the SEG13 pin of the liquid crystal panel is connected to the SEG13 of the blue background negative display liquid crystal panel; and so on. The SEG14 pin to SEG51 pin of the liquid crystal driving chip are connected to the SEG14 pin to SEG51 pin of the blue background negative display liquid crystal panel, so that the liquid crystal driving chip is connected to the blue background negative display liquid crystal panel.

[0029] As Figure 3 shown in the schematic diagram of the MCU chip of the present utility model, it can be seen from this figure that there are several pins on the MCU chip, among which:

[0030] The VCAP pin of the MCU is connected to the first ends of capacitor C20 and capacitor C15. As Figure 4 shown in the circuit diagram, the second ends of capacitor C12, capacitor C13, capacitor C14, capacitor C15, capacitor C16, and capacitor C20 are all grounded. The first ends of capacitor C12, capacitor C13, and capacitor C16 are connected to a 5V voltage. The first end of capacitor C14 is connected to resistor R21, and the end of resistor R21 that is not connected to capacitor C14 is connected to a 5V voltage;

[0031] Based on Figure 3 , and then look at Figure 5, the XTLI pin of the MCU is connected to the first ends of capacitor C1 and capacitor C2, and the quartz crystal Y1 is connected to the first ends of capacitor C1 and capacitor C2; the second ends of capacitor C1 and capacitor C2 are both grounded;

[0032] On Figure 1 Based on this, let's look at Figure 6 , the PWM_OUT pin of the MCU is connected to the first end of resistor 3R4, the second end of resistor 3R4 is connected to a triode 3Q1 and is connected to the first end of the triode 3Q1, the third end of the triode is grounded, the second end of resistor 3R4 is connected to the first end of resistor 3R5, and the second end of resistor 3R5 is connected to the third end of the triode 3Q1 and is grounded.

[0033] On Figure 3 Based on this, let's look at Figure 7 , the ZM_IN pin of the MCU is connected to the ambient light detection module; and the ZM_IN pin is connected to the first end of resistor 3R27, the first ends of resistor 3R29, capacitor 3C7, resistor 3R26 and the first end of the photosensitive diode GD are all connected to the second end of resistor 3R27, the second end of the photosensitive diode GD and the second end of resistor 3R29 are both connected to a 5V voltage, and the second end of resistor 3R26 and the second end of capacitor 3C7 are both grounded.

[0034] On Figure 3 Based on this, let's look at Figure 8 , the POWOK pin of the MCU chip is connected to the static current control module; and the POWOK pin is connected to the first end of resistor 0R4, the second end of resistor 0R4 is connected to a triode 0Q1 and is connected to the first end of the triode 0Q1, the first end of resistor 0R2 is connected to the second end of resistor 0R4, and the second end of resistor 0R2 and the third end of the triode 0Q1 are both grounded, the second end of the triode is connected to the first end of resistor 0R3, the second end of resistor 0R3 is connected to the first end of resistor 0R1 and the first end of triode 0Q2, the second end of resistor 0R1 is connected to the third end of the triode and is connected to a 5V voltage; the first ends of capacitor 0C1, capacitor 0C2 and capacitor 0C3 are connected and connected to the second end of triode 0Q2 and are connected to a 5V voltage, and the second ends of capacitor 0C1, capacitor 0C2 and capacitor 0C3 are all grounded.

[0035] The KEY1 and KEY2 pins of the MCU chip are connected to the switch module.

[0036] The OTS_IN pin of the MCU chip is connected to the oil pressure alarm module.

[0037] The P_IN pin of the MCU chip is connected to the P signal module.

[0038] The A_IN pin of the MCU chip is connected to the automatic start-stop module.

[0039] The FUEL pin of the MCU chip is connected to the fuel quantity acquisition module.

[0040] The CAN_STBY, CAN_TX, and CAN_RX pins of the MCU chip are connected to the CAN circuit module.

[0041] At Figure 1 On this basis, look again Figure 9 , the I2C_SDA pin and the I2C_SCL pin of the MCU chip are connected to the resistor array R1; the I2C_SDA pin and the I2C_SCL pin of the MCU chip are respectively connected to the 1st pin and the 2nd pin, the 3rd pin and the 4th pin of the resistor array; the 1st pin and the 2nd pin of the resistor array are connected to the first ends of the resistor R5 of model R0603 and the resistor R6 of model R0603, and the first ends of the resistor R5 and the resistor R6 are connected and connected to a 5V voltage.

[0042] The LE_OUT, CLK_OUT, and SDI_OUT pins of the MCU chip are connected to the resistor array 5R40.

[0043] The SWCLK pin and the SWDIO pin of the MCU chip are connected to the program writing module.

[0044] The CLL_IN, HB_IN, R_TURN_IN, and L_TURN_IN pins of the MCU chip are connected to the turn signal module.

[0045] The FI_IN pin of the MCU chip is connected to the engine fault detection signal module.

[0046] The TEMP_ADC pin of the MCU chip is connected to the water temperature signal acquisition module.

[0047] The MCU chip HC32L072JATA serves as the core control unit and is closely connected to multiple functional modules through multiple pins, forming an efficient and intelligent monitoring and display system. The dynamic working processes of each module are intertwined to jointly ensure the safety, reliability, and convenience of the motorcycle during driving. First of all, the startup process of the MCU chip is the starting point for the operation of the entire system. When the motorcycle is ignited, the MCU initializes each connected module to ensure the normal operation of each module. The static current control module is the bridge between the MCU and the power management. It is responsible for monitoring the static current status of the battery. When the motorcycle is turned off, the MCU reduces the static current consumption through the static current control module to extend the battery life. This process is automatic to ensure that the motorcycle can still be started when not in use without excessive battery discharge. Next, the connection between the oil pressure alarm module and the MCU is crucial. The MCU monitors the oil pressure in real time through specific pins. Once it detects that the oil pressure is below the safety threshold, the MCU will immediately send an alarm signal to notify the driver. Through the liquid crystal display module, the abnormal status of the oil pressure will be clearly displayed in text or graphics on the dashboard. This mechanism greatly improves the driver's attention to the oil status and prevents engine damage caused by insufficient oil. The turn signal module is connected to the MCU and can receive the driver's turning intention in real time. When the driver presses the turn signal switch, the MCU receives the signal and controls the flashing frequency and brightness of the turn signals. This process not only improves driving safety but also ensures that other road users can clearly identify the driving direction of the motorcycle. While controlling the turn signals, the MCU also monitors for any faults. If the turn signals do not light up or flash abnormally, the MCU will immediately send a fault alarm through the liquid crystal display module to ensure that the driver can handle the problem in a timely manner. The ABS fault detection module is also crucial in its connection to the MCU. The MCU regularly sends query signals to the ABS module to check the status of the ABS system. If any faults are detected, the MCU will quickly take measures, trigger an alarm, and display the fault code on the liquid crystal display, enabling the driver to promptly understand and resolve potential problems to ensure braking safety during motorcycle driving. The engine fault signal detection module is another key safety monitoring module. The MCU is connected to it through pins to monitor various engine parameters in real time, such as speed, temperature, and pressure. When any abnormal situation is detected, the MCU compares it with the preset fault codes, quickly determines the type of fault, and feeds back the corresponding fault information to the driver through the liquid crystal display. This rapid response mechanism not only improves the efficiency of fault diagnosis but also provides necessary references for subsequent maintenance and repair. The automatic start-stop module is controlled by the MCU to optimize the fuel economy of the motorcycle. When the motorcycle stops in front of a red light, the MCU detects that the vehicle is in a stopped state and checks the surrounding environmental conditions. If the conditions for automatic start-stop are met, the MCU will instruct the automatic start-stop module to turn off the engine to save fuel.When the driver is ready to start, the MCU will send a signal in a timely manner to restart the engine, ensuring that the motorcycle can start smoothly. The efficient cooperation of this module not only improves fuel efficiency but also reduces emissions, meeting modern environmental protection requirements. The function of the ambient light detection module cannot be ignored either. The MCU is connected to this module through pins to monitor the surrounding light intensity in real time. When the light intensity drops to the set threshold, the MCU will automatically adjust the backlight brightness of the instrument panel to ensure that the driver can clearly view the instrument information under various lighting conditions. This function not only improves driving safety but also provides a more comfortable operation experience for the driver. The fuel quantity acquisition module is responsible for continuously monitoring the fuel quantity in the fuel tank. The MCU is connected to it through pins to obtain the fuel quantity data in real time. When the fuel quantity is below the safety line, the MCU will trigger an alarm to remind the driver to refuel as soon as possible, avoiding driving inconvenience caused by insufficient fuel. The fuel quantity monitoring data is also recorded by the MCU and used for subsequent fuel economy analysis, providing scientific fuel consumption advice for the driver. In addition, the MCU is also connected to the CAN circuit, which is a key module for communication between various electronic systems of the motorcycle. The MCU conducts efficient data transmission and communication with other electronic modules through the CAN bus to ensure the smooth flow of information between systems. During the motorcycle's driving process, the MCU can receive information from modules such as speed sensors and temperature sensors in real time and process and respond according to needs. For example, when the speed sensor feeds back a change in vehicle speed, the MCU will promptly adjust the speed display on the instrument panel to ensure the real-time and accuracy of the information. The program writing module is an important link for the MCU to be updated and maintained. By connecting to the program writing module, the MCU can receive new program codes or configuration files to achieve flexible and convenient version upgrades during system updates. This function ensures that the motorcycle's electronic system always operates in the best state and can adapt to future technological developments and market demands. The P signal module is used to transmit specific status signals of the motorcycle, such as parking signals, engine-off states, etc. These information are crucial for the operation of other modules. The MCU judges the current working state of the motorcycle through these signals and makes corresponding control decisions accordingly to ensure the efficient operation of the system. The water temperature signal acquisition module is also a key safety monitoring module. The MCU monitors the change in the engine's water temperature in real time through the connected pins. When the water temperature exceeds the safe range, the MCU will immediately activate an alarm and display relevant information on the liquid crystal display to remind the driver to check and prevent engine damage caused by excessive water temperature. Finally, the connection of the switch module ensures that the driver can directly control some basic functions of the system through physical switches, such as lights, horns, etc. After receiving the signal from the switch module, the MCU will immediately perform corresponding actions, such as turning on the headlights or sounding the horn, ensuring that the motorcycle's control response is sensitive.

[0048] The present utility model deeply explains its purpose, technical solution and beneficial effects through specific embodiments. However, these embodiments are only examples to show the application modes of the invention and do not constitute a limitation to the protection scope of the present invention. We clearly point out that any reasonable modification, equivalent replacement or technical improvement under the guidance of the spirit and principle of the present invention should be included in the protection scope of the present utility model. This means that as long as these changes do not deviate from the core idea and basic functions of the invention, they should be protected by the patent right. The protection scope of the present invention should be broad, including all direct and obvious variants and non-obvious innovations that can be reasonably deduced by technical experts based on the disclosed content of the present invention. This broad protection aims to promote further research and development based on the present invention, while ensuring that its innovation and practicability are comprehensively protected by law.

Claims

1. A liquid crystal display motorcycle instrument, characterized in that The motorcycle instrument includes an MCU chip, a liquid crystal driving chip, and a blue-background negative display liquid crystal panel; the MCU chip is connected to the liquid crystal driving chip through a resistor array R1, and the liquid crystal driving chip is connected to the blue-background negative display liquid crystal panel; a signal acquisition module and an alarm module are connected to the MCU chip, a signal module and an acquisition module are connected to the MCU chip, a program writing module, a signal module, and a static current control module are connected to the MCU chip, and the MCU chip is connected to a CAN circuit; the liquid crystal driving chip is connected to the blue-background negative display liquid crystal panel.

2. The liquid crystal display motorcycle instrument according to claim 1, characterized in that The connection method between the MCU chip and the liquid crystal driving chip is that the I2C_SDA pin and the I2C_SCL pin of the MCU chip are connected to the resistor array R1, and the I2C_SDA2 pin and the I2C_SCL2 pin of the liquid crystal driving chip are connected to the resistor array R1, so that the MCU chip is connected to the liquid crystal driving chip through the resistor array R1.

3. The LCD motorcycle instrument according to claim 1, wherein The signal acquisition module includes an oil quantity signal acquisition module and a water temperature acquisition module.

4. A liquid crystal display motorcycle instrument according to any one of claims 1 to 3, characterized in that The POWOK pin of the MCU is connected to the resistor 0R4, the resistor 0R4 is connected to the triode 0Q1, and the resistor 0R2 is also connected to the resistor 0R4 and grounded; the output of the triode 0Q1 is connected to the resistor 0R3, the resistor 0R3 is connected to the resistor 0R1 and the triode 0Q2, and the other end of the resistor 0R1 is connected to the 5V power supply; the first ends of the capacitors 0C1, 0C2, and 0C3 are connected to the triode 0Q2, and the second ends are grounded.

5. A liquid crystal display motorcycle instrument according to any one of claims 1 to 3, characterized in that The COM series pins and the SEG series pins of the liquid crystal driving chip are connected to the blue-background negative display liquid crystal panel.

6. A liquid crystal display motorcycle instrument according to claim 1 or 3, characterized in that The alarm module includes an oil pressure alarm module, the signal acquisition module includes a water temperature signal acquisition module and an oil quantity signal acquisition module, and the signal module includes a P signal module and a turn signal module.

7. A liquid crystal display motorcycle instrument according to claim 6, characterized in that The OTS_IN pin of the MCU chip is connected to the oil pressure alarm module.

8. A liquid crystal display motorcycle instrument according to claim 6, characterized in that The P_IN pin of the MCU chip is connected to the P signal module; the CLL_IN pin, the HB_IN pin, the R_TURN_IN pin, and the L_TURN_IN pin of the MCU are connected to the turn signal module.

9. A liquid crystal display motorcycle instrument according to claim 1 or 2 or 3 or 7 or 8, characterized in that The CAN_STBY pin, the CAN_TX pin, and the CAN_RX pin of the MCU chip are connected to the CAN circuit.

10. The LCD motorcycle instrument according to claim 3, characterized in that The FUEL pin of the MCU chip is connected to the oil quantity acquisition signal module, and the TEMP_ADC pin of the MCU chip is connected to the water temperature acquisition module.

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