Commercial vehicle cooling fan control device

Abstract

The utility model discloses a commercial vehicle cooling fan control device which monitors the temperature of cooling liquid in real time through a temperature sampling module, a main control module judges cooling requirements according to the temperature, a fan driving module accurately adjusts the rotating speed of a fan to a target value, cooling efficiency is optimized, energy consumption is reduced, and the service life of an engine is prolonged. The fault monitoring module detects the state of the fan in real time and prevents potential safety hazards such as overheating, once a fault is found, an alarm is sent to the upper computer through the communication module, timely maintenance is ensured, the reliability and safety of the device are enhanced, the communication module further achieves remote communication between the main control module and the upper computer, a user can conveniently and remotely monitor and manage the cooling system, and the service life of the cooling system is prolonged. Historical data are checked, performance is analyzed, parameters are flexibly adjusted, the intelligent level of the system is improved, and the daily maintenance and optimization process is simplified.

Description

Technical Field

[0001] This utility model relates to the field of automotive control technology, and in particular to a cooling fan control device for commercial vehicles. Background Technology

[0002] In the commercial vehicle sector, the cooling fan is an important component of the engine cooling system, and its performance directly affects the engine's heat dissipation effect and the vehicle's operational stability. Traditional commercial vehicle cooling fan control devices often employ relatively simple control methods, such as dual-speed engine cooling fan control systems. These devices control the fan's start-up and speed switching through air conditioning pressure switches or temperature switches. However, this control method has significant limitations, such as low control precision and high heat loss, and cannot meet the demands of modern commercial vehicles for efficient and precise control of cooling fans. Utility Model Content

[0003] In view of this, the present invention proposes a cooling fan control device for commercial vehicles, which can solve the obvious defects of low control accuracy and large heat loss in the existing technology.

[0004] The technical solution of this utility model is implemented as follows:

[0005] A commercial vehicle cooling fan control device, comprising:

[0006] The power supply module provides operating voltage to the main control module and the fan drive module.

[0007] The fan drive module is used to adjust the speed of the cooling fan to the target speed;

[0008] The temperature sampling module is used to monitor the coolant temperature of commercial vehicle engines in real time and send the temperature data to the main control module;

[0009] The main control module is used to receive and process temperature data from the temperature sampling module and output fan speed control signals;

[0010] The fault monitoring module is used to monitor the fan's operating status in real time;

[0011] The communication module is used for communication between the main control module and the host computer.

[0012] As a further optional solution for the commercial vehicle cooling fan control device, the fan drive module adopts a three-phase motor drive circuit, with each phase motor drive circuit controlling one fan motor.

[0013] As a further optional solution to the commercial vehicle cooling fan control device, the temperature sampling module includes:

[0014] A thermistor is used to detect ambient temperature and convert it into an electrical signal.

[0015] An analog-to-digital converter is used to convert the analog temperature signal generated by a thermistor into a digital signal;

[0016] Resistive elements are used for voltage division and current limiting;

[0017] Transistor elements, as amplification and switching elements, are used to process and transmit temperature signals.

[0018] As a further optional solution for the commercial vehicle cooling fan control device, the fault monitoring module adopts an OBD II-feedback interface and its peripheral circuitry to monitor the fan's operating status in real time.

[0019] As a further optional solution for the commercial vehicle cooling fan control device, the main control module includes the LCA039BC34GU8 chip and its peripheral circuits.

[0020] As a further optional solution for the commercial vehicle cooling fan control device, the communication module adopts a LIN communication interface and its peripheral circuits.

[0021] As a further optional solution for the commercial vehicle cooling fan control device, the control device also includes a voltage regulator module. The main control module is electrically connected to the power supply module through the voltage regulator module to provide a stable operating voltage to the main control module.

[0022] As a further optional solution for the commercial vehicle cooling fan control device, the voltage regulator module LN10261Q1-11-SOIC-EP8 chip and its peripheral circuitry are included.

[0023] The beneficial effects of this invention are as follows: The temperature sampling module monitors the engine coolant temperature in real time, enabling the main control module to accurately obtain the current cooling requirements. The fan drive module precisely adjusts the cooling fan speed to the target speed based on the fan speed control signal output by the main control module, ensuring the engine operates within the most suitable temperature range. This precise cooling control not only improves cooling efficiency and reduces unnecessary energy consumption but also helps extend the engine's service life. The fault monitoring module monitors the fan's operating status in real time, enabling timely detection of fan faults or abnormalities, avoiding potential safety issues such as engine overheating caused by fan failure. When a fault is detected, the device can send alarm information to the host computer via the communication module, reminding maintenance personnel to handle the situation promptly, thereby improving the device's reliability and safety. The communication module establishes a communication connection between the main control module and the host computer, allowing users to remotely monitor the cooling fan control system's operating status via the host computer. This remote monitoring function not only facilitates daily management and maintenance of the system but also improves the device's intelligence level. Through the host computer, users can view historical data, analyze device performance, and adjust and optimize parameters as needed. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the composition of a commercial vehicle cooling fan control device according to the present invention;

[0026] Figure 2 This is a circuit diagram of the power supply module in this utility model;

[0027] Figure 3 This is a circuit diagram of the fan drive module in this utility model;

[0028] Figure 4 This is a circuit diagram of the temperature sampling module in this utility model;

[0029] Figure 5 This is a circuit diagram of the main control module in this utility model;

[0030] Figure 6 This is a circuit diagram of the fault monitoring module in this utility model;

[0031] Figure 7 This is a circuit diagram of the communication module in this utility model;

[0032] Figure 8 This is a circuit diagram of the voltage regulator module in this utility model. Detailed Implementation

[0033] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] refer to Figures 1 to 8 A commercial vehicle cooling fan control device, comprising:

[0035] The power supply module provides operating voltage to the main control module and the fan drive module.

[0036] The fan drive module is used to adjust the speed of the cooling fan to the target speed;

[0037] The temperature sampling module is used to monitor the coolant temperature of commercial vehicle engines in real time and send the temperature data to the main control module;

[0038] The main control module is used to receive and process temperature data from the temperature sampling module and output fan speed control signals;

[0039] The fault monitoring module is used to monitor the fan's operating status in real time;

[0040] The communication module is used for communication between the main control module and the host computer.

[0041] In this embodiment, the engine coolant temperature is monitored in real time by a temperature sampling module, enabling the main control module to accurately obtain the current cooling demand. The fan drive module precisely adjusts the cooling fan speed to the target speed based on the fan speed control signal output by the main control module, ensuring the engine operates within the optimal temperature range. This precise cooling control not only improves cooling efficiency and reduces unnecessary energy consumption but also helps extend the engine's lifespan. The fault monitoring module monitors the fan's operating status in real time, enabling timely detection of fan faults or abnormalities, preventing potential safety issues such as engine overheating caused by fan failure. When a fault is detected, the system can send alarm information to the host computer via the communication module, reminding maintenance personnel to handle the issue promptly, thereby improving the device's reliability and safety. The communication module establishes a communication connection between the main control module and the host computer, allowing users to remotely monitor the cooling fan control system's operating status. This remote monitoring function not only facilitates daily management and maintenance of the system but also enhances the device's intelligence level. Through the host computer, users can view historical data, analyze device performance, and adjust and optimize parameters as needed.

[0042] Preferably, the fan drive module adopts a three-phase motor drive circuit, with each phase motor drive circuit controlling one fan motor.

[0043] In this embodiment, the three-phase motor drive circuit offers higher stability and reliability compared to a single-phase motor drive. Because the three-phase motor has three independent power phases with a 120-degree phase difference, this design allows for smoother torque and speed generation during operation. Therefore, when each phase drive circuit controls one fan motor, it ensures smooth operation during startup, running, and stopping, reducing the impact of motor vibration and noise on commercial vehicle operation. The three-phase motor drive circuit can more effectively control the fan motor's speed and power. By precisely adjusting the current and voltage of each phase drive circuit, accurate control of the fan motor's speed can be achieved. This precise control allows the fan motor to dynamically adjust based on the actual temperature of the engine coolant, ensuring the engine always operates within its optimal temperature range. Furthermore, the higher energy conversion efficiency of the three-phase motor allows for more efficient conversion of electrical energy into mechanical energy, improving the fan motor's heat dissipation efficiency. The higher reliability and stability of the three-phase motor drive circuit reduce the device's failure rate. Since each phase drive circuit is independent, if one phase fails, the others can still operate normally, ensuring continuous operation of the device.

[0044] Preferably, the temperature sampling module includes:

[0045] A thermistor is used to detect ambient temperature and convert it into an electrical signal.

[0046] An analog-to-digital converter is used to convert the analog temperature signal generated by a thermistor into a digital signal;

[0047] Resistive elements are used for voltage division and current limiting;

[0048] Transistor elements, as amplification and switching elements, are used to process and transmit temperature signals.

[0049] In this embodiment, the thermistor can significantly change its resistance value with changes in ambient temperature, thereby achieving accurate temperature sensing. By combining the thermistor with an appropriate circuit, the change in its resistance value can be converted into a voltage or current signal. The analog-to-digital converter can convert the analog temperature signal generated by the thermistor into a digital signal. The high-resolution analog-to-digital converter can accurately capture minute changes in the analog signal, thereby ensuring high accuracy of temperature measurement. The resistor element acts as a voltage divider in the circuit, adjusting the voltage level in the circuit to protect other electronic components from damage caused by excessive voltage. By limiting the current in the circuit, the resistor element can prevent circuit overload and short circuit faults, improving the reliability and stability of the circuit. The transistor acts as an amplifier, amplifying the temperature signal, making it easier to detect and record. The transistor has switching characteristics, controlling the on and off of the circuit, thereby achieving control over the transmission and processing of the temperature signal. By controlling the conduction and cutoff states of the transistor, the circuit can be protected from excessive current or voltage surges, and the circuit's operating state can be adjusted to adapt to different temperature measurement needs.

[0050] It should be noted that resistors R30 and R35 form a resistive element, and transistors TP17 and RTI form a transistor element.

[0051] Preferably, the fault monitoring module uses an OBDI I-feedback interface and its peripheral circuitry to monitor the fan's operating status in real time.

[0052] In this embodiment, the OBDI I-feedback interface and its peripheral circuitry can monitor the fan's operating status in real time, including key parameters such as speed, current, and voltage. Real-time monitoring helps to promptly detect abnormalities in fan operation, thereby preventing potential faults. When abnormalities occur in the fan's operating status, such as a decrease in speed or current fluctuations, the fault monitoring module can quickly issue an early warning signal. This signal can remind operators or the system to take timely measures, such as replacing the fan or adjusting the working environment, to prevent the fault from escalating further. The fault monitoring module can record detailed data on the fan's operating status, including the time, location, and type of the fault. This data helps to accurately locate the fault and provides maintenance personnel with accurate fault information, enabling rapid troubleshooting. Through real-time monitoring and fault warnings, fan faults can be detected and addressed promptly, preventing further damage and reducing maintenance costs. This also helps to extend the fan's lifespan.

[0053] Preferably, the main control module includes an LCA039BC34GU8 chip and its peripheral circuits.

[0054] Preferably, the communication module uses an LIN communication interface and its peripheral circuitry.

[0055] Preferably, the control device further includes a voltage regulator module, and the main control module is electrically connected to the power supply module via the voltage regulator module to provide a stable operating voltage to the main control module.

[0056] Preferably, the voltage regulator module is an LN10261Q1-11-SOI C-EP8 chip and its peripheral circuitry.

[0057] In this embodiment, voltage instability is one of the common causes of electronic device failures. By introducing a voltage regulator module, the failure rate of the main control module caused by voltage fluctuations can be significantly reduced. This helps extend the service life of the main control module and reduce maintenance and replacement costs. A stable voltage supply ensures that the main control module operates in its optimal working condition, thereby improving its efficiency. This helps improve the response speed and processing capacity of the entire control device, enabling it to better meet the needs of commercial vehicle cooling fan control. When the voltage output by the power module is too high, the voltage regulator module can limit the output voltage to prevent it from exceeding the main control module's tolerance range. This helps protect the main control module from overvoltage damage and ensures its long-term stable operation. Similarly, when the voltage output by the power module is too low, the voltage regulator module can maintain the output voltage above a certain level, preventing the main control module from failing to operate normally due to undervoltage. The voltage regulator module can adapt to power inputs with different voltage ranges and fluctuation ranges, thereby ensuring that the main control module can obtain a stable operating voltage under different power supply environments.

[0058] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A commercial vehicle cooling fan control device, characterized in that, include: The power supply module provides operating voltage to the main control module and the fan drive module. The fan drive module is used to adjust the speed of the cooling fan to the target speed; The temperature sampling module is used to monitor the coolant temperature of commercial vehicle engines in real time and send the temperature data to the main control module; The main control module is used to receive and process temperature data from the temperature sampling module and output fan speed control signals; The fault monitoring module is used to monitor the fan's operating status in real time; The communication module is used for communication between the main control module and the host computer.

2. The commercial vehicle cooling fan control device according to claim 1, characterized in that, The fan drive module adopts a three-phase motor drive circuit, with each phase motor drive circuit controlling one fan motor.

3. A commercial vehicle cooling fan control device according to claim 2, characterized in that, The temperature sampling module includes: A thermistor is used to detect ambient temperature and convert it into an electrical signal. An analog-to-digital converter is used to convert the analog temperature signal generated by a thermistor into a digital signal; Resistive elements are used for voltage division and current limiting; Transistor elements, as amplification and switching elements, are used to process and transmit temperature signals.

4. A commercial vehicle cooling fan control device according to claim 3, characterized in that, The fault monitoring module uses the OBDI I-feedback interface and its peripheral circuitry to monitor the fan's operating status in real time.

5. A commercial vehicle cooling fan control device according to claim 4, characterized in that, The main control module includes the LCA039BC34GU8 chip and its peripheral circuits.

6. A commercial vehicle cooling fan control device according to claim 5, characterized in that, The communication module uses a LIN communication interface and its peripheral circuits.

7. A commercial vehicle cooling fan control device according to claim 6, characterized in that, The control device also includes a voltage regulator module. The main control module is electrically connected to the power supply module via the voltage regulator module to provide a stable operating voltage to the main control module.

8. A commercial vehicle cooling fan control device according to claim 7, characterized in that, The voltage regulator module LN10261 Q1-11-SOIC-EP8 chip and its peripheral circuits.

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