Intelligent automobile headlamp control system based on CAN bus communication

Abstract

The utility model provides a kind of intelligent automobile headlamp control system based on CAN bus communication, including the side installation of headlamp body with heat dissipation cover, the inside of heat dissipation cover is provided with heat dissipation mechanism, and heat dissipation mechanism includes heat dissipation fan.The utility model introduces multistage collaborative heat dissipation system by heat pipe, heat dissipation fin and heat dissipation fan, realizes the accurate heat dissipation of LED wick, wherein, the vacuum copper heat pipe filled with phase change material can conduct the heat of wick core part to the heat dissipation fin of far end instantaneously with very high efficiency, solve the bottleneck of long heat dissipation path and low efficiency of traditional scheme.Combining the forced convection of heat dissipation fan of intelligent control, form the efficient heat dissipation mode of "active conduction+forced convection", can significantly reduce LED junction temperature, thereby effectively curb light decay, prolong the service life of headlamp, and guarantee the stability of illumination performance.

Description

Technical Field

[0001] This utility model belongs to the field of automotive headlight control technology, and more specifically, it relates to an intelligent automotive headlight control system based on CAN bus communication. Background Technology

[0002] As a crucial component of a vehicle's active safety system, the performance of automotive headlights directly impacts driving safety at night and in adverse weather conditions. With the widespread adoption of new light source technologies such as LEDs (light-emitting diodes), the brightness and energy consumption of automotive headlights have been optimized, but this has also brought new challenges. On one hand, high-power LEDs generate a significant amount of heat during operation, and the luminous efficacy and lifespan of LEDs are extremely sensitive to junction temperature; overheating will lead to accelerated light decay, color temperature drift, and a significantly shortened lifespan.

[0003] Currently, most automotive headlights on the market employ passive or solely active cooling designs. For example, utility model patent CN218671844U discloses an automotive headlight that uses a fan mechanism on the outside of the bulb mounting slot for heat dissipation. While this solution improves heat dissipation to some extent, its cooling path is indirect and its efficiency is limited. Relying solely on surface convection makes it difficult to quickly remove heat from the core components of the bulb or LED chip, leaving significant room for improvement in cooling performance. Furthermore, this solution does not involve integration with the vehicle's thermal management system, resulting in a simplistic cooling strategy.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided an intelligent automotive headlight control system based on CAN bus communication, in order to achieve a more practical value. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides an intelligent automotive headlight control system based on CAN bus communication, achieved through the following specific technical means: A smart automotive headlight control system based on CAN bus communication includes a headlight body, a heat sink cover installed on one side of the headlight body, a heat dissipation mechanism inside the heat sink cover, the heat dissipation mechanism including a cooling fan installed on one side of the inner wall of the heat sink cover, the headlight body including a lamp holder, and a protective lens provided on one side of the headlight body.

[0006] Preferably, the heat dissipation mechanism further includes multiple heat dissipation fins, which are located at the air outlet of the cooling fan. The multiple heat dissipation fins are fixed to the inner wall of the heat dissipation cover. Multiple heat conduction pipes are installed on one side of each of the multiple heat dissipation fins. One end of each of the multiple heat conduction pipes passes through the heat dissipation cover and extends into the interior of the headlight body. One end of each of the multiple heat conduction pipes is connected to the lamp holder.

[0007] Preferably, a mounting housing is installed on one side of the heat sink, and a motor is installed on one side of the inner wall of the mounting housing. The output end of the motor passes through the heat sink and is connected to the cooling fan. A control unit is also installed on one side of the inner wall of the mounting housing. The control unit is connected to the vehicle communication interface through a wire and is used to automatically adjust the fan speed according to environmental data, thereby achieving the purpose of temperature control.

[0008] Preferably, a rain cover is provided on the outer side of the headlight body, and the two sides of the rain cover are fixed to the headlight body by bolts.

[0009] Preferably, a sealing gasket is provided at the connection between the protective lens and the headlight body to improve the sealing performance and prevent rainwater from entering.

[0010] Preferably, the heat sink has multiple heat dissipation holes on its outer side to contact the outside air, thereby improving the internal air circulation capacity.

[0011] Preferably, the plurality of heat pipes are vacuum copper pipes, and their interiors are filled with phase change material.

[0012] Preferably, the control unit is connected to the vehicle's CAN network via a CAN bus interface to receive data from vehicle sensors and the ECU, and to send control commands.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention achieves precise heat dissipation of the LED chip by introducing a multi-stage collaborative heat dissipation system consisting of heat pipes, heat sink fins, and a cooling fan. The vacuum copper heat pipe, filled with phase change material, efficiently conducts heat from the core of the chip to the distant heat sink fins, overcoming the bottlenecks of long heat dissipation paths and low efficiency in traditional solutions. Combined with a smart-controlled cooling fan for forced convection, a highly efficient heat dissipation mode of "active conduction + forced convection" is formed, significantly reducing the LED junction temperature, thereby effectively curbing light decay, extending headlight lifespan, and ensuring stable illumination performance.

[0014] This invention integrates heat dissipation management and lighting control at the system level through a single control unit. The control unit dynamically adjusts the cooling fan speed based on real-time acquired lighting power, ambient temperature, and vehicle load status. For example, when the system is using high-intensity high beams or detects a high engine compartment temperature, it actively increases the cooling power; while under low load or low temperature conditions, it reduces the fan speed to save energy and reduce noise. This intelligent linkage ensures the system always operates under optimal conditions, achieving the best balance between performance, lifespan, and energy efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of an intelligent automotive headlight control system based on CAN bus communication according to this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of an intelligent automotive headlight control system based on CAN bus communication according to this utility model.

[0017] Figure 3 This is a schematic diagram of the heat pipe structure of an intelligent automotive headlight control system based on CAN bus communication according to this utility model.

[0018] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Headlight body; 2. Heat sink cover; 3. Mounting housing; 4. Lamp holder; 5. Cooling fan; 6. Heat dissipation fins; 7. Heat pipe; 8. Heat dissipation holes; 9. Motor; 10. Protective lens; 11. Sealing gasket; 12. Rain cover; 13. Bolt; 14. Control unit. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Example: As attached Figure 1 To be continued Figure 3 As shown: This utility model provides an intelligent automotive headlight control system based on CAN bus communication, including a headlight body 1, a heat sink 2 installed on one side of the headlight body 1, a heat dissipation mechanism inside the heat sink 2, the heat dissipation mechanism including a cooling fan 5 installed on one side of the inner wall of the heat sink 2, the headlight body 1 including a lamp holder 4, a protective lens 10 provided on one side of the headlight body 1, and the heat dissipation mechanism also including multiple heat dissipation fins 6, the heat dissipation fins 6 being located at the air outlet of the cooling fan 5, the multiple heat dissipation fins 6 being fixed to the inner wall of the heat sink 2, multiple heat conduction pipes 7 being installed on one side of each of the multiple heat dissipation fins 6, one end of each of the multiple heat conduction pipes 7 penetrating the heat sink 2 and extending into the interior of the headlight body 1, one end of each of the multiple heat conduction pipes 7 being connected to the lamp holder 4, the multiple heat conduction pipes 7 being vacuum copper pipes, and their interiors being filled with phase change material, by introducing a multi-stage collaborative heat dissipation system composed of heat conduction pipes 7, heat dissipation fins 6 and cooling fan 5, precise heat dissipation of the LED lamp core is achieved. Among them, the vacuum copper heat pipe 7, filled with phase change material, can instantly conduct heat from the core of the lamp core to the heat dissipation fins 6 at the far end with extremely high efficiency, solving the bottleneck of long heat dissipation path and low efficiency in traditional solutions. Combined with the intelligently controlled cooling fan 5 for forced convection, a highly efficient heat dissipation mode of "active conduction + forced convection" is formed, which can significantly reduce the LED junction temperature, thereby effectively curbing light decay, extending the life of the headlight, and ensuring the stability of illumination performance.

[0021] The heat sink 2 has a mounting housing 3 installed on one side, and a motor 9 is installed on one side of the inner wall of the mounting housing 3. The output end of the motor 9 passes through the heat sink 2 and is connected to the cooling fan 5. A control unit 14 is also installed on one side of the inner wall of the mounting housing 3. The control unit 14 is connected to the vehicle communication interface through a wire and is used to automatically adjust the fan speed according to environmental data, thereby achieving the purpose of temperature control.

[0022] The headlight body 1 has a rain cover 12 on its outer side. The two sides of the rain cover 12 are fixed to the headlight body 1 by bolts 13. The rain cover 12 is fixed to the outer side of the headlight body 1 by bolts 13 to prevent rainwater from directly hitting the protective lens 10.

[0023] A sealing gasket 11 is provided at the connection between the protective lens 10 and the headlight body 1. The sealing gasket 11 improves the sealing performance at this point and prevents rainwater from entering.

[0024] The heat sink 2 has multiple heat dissipation holes 8 on its outer side, which come into contact with the outside air, thereby improving the internal air circulation.

[0025] The control unit 14 connects to the vehicle's CAN network via a CAN bus interface to receive data from vehicle sensors and the ECU, and to send control commands. This integrates thermal management and lighting control at the system level through the same control unit 14. The control unit 14 dynamically adjusts the speed of the cooling fan 5 based on real-time acquired lighting power, ambient temperature, and vehicle load status. For example, it actively increases cooling power when the system is using high-intensity high beams or when a high engine compartment temperature is detected; conversely, it reduces fan speed under low load or low temperature conditions to save energy and reduce noise. This intelligent linkage ensures the system always operates under optimal conditions, achieving the best balance between performance, lifespan, and energy efficiency.

[0026] The working principle of this embodiment is as follows: The heat dissipation process is completed collaboratively by the heat pipes 7, the heat dissipation fins 6, and the cooling fan 5. During operation, the heat generated by the LED chip is first transferred to the lamp holder 4. Multiple heat pipes 7, which are tightly connected to the lamp holder 4, utilize the efficient phase change heat transfer characteristics of their internal phase change materials to rapidly conduct heat from inside the headlight body 1 to the heat dissipation fins 6 inside the heat sink 2. The heat dissipation fins 6 are responsible for diffusing heat across their large surface area. At the same time, the cooling fan 5, installed inside the heat sink 2, rotates under the drive of the motor 9, generating forced airflow. The airflow passes through the gaps between the heat dissipation fins 6 and the heat dissipation holes 8, efficiently carrying the heat away from the external environment, forming an efficient heat dissipation mode of active conduction and forced convection. The intelligent control process is centrally handled by the control unit 14. The control unit 14 continuously receives real-time data from the vehicle's CAN network through its integrated CAN bus interface. This data includes, but is not limited to, ambient light intensity from the ambient light sensor, engine compartment temperature from the engine management system, current headlight power load from the body control module, and signals from the rain sensor. The control algorithm pre-installed within the control unit 14 comprehensively analyzes and makes decisions based on this multi-source information, thereby generating corresponding control commands. For example, when the system determines that it is currently under high-intensity lighting and the engine compartment temperature is high, the control unit 14 will drive the motor 9 to increase the speed of the cooling fan 5 to enhance heat dissipation. Conversely, in low-load or low-temperature environments, the fan speed will be reduced to achieve energy saving and noise reduction. Through this dynamic adjustment based on the overall vehicle status, the system achieves an optimal balance between heat dissipation efficiency and energy consumption. In addition, the system's physical protection is jointly ensured by the rain shield 12 and the sealing gasket 11. The rain shield 12 is fixed to the outside of the headlight body 1 by bolts 13, forming the first line of defense to prevent rainwater and impurities from directly impacting the protective lens 10. The sealing gasket 11 at the connection between the protective lens 10 and the headlight body 1 forms a tight secondary seal, effectively preventing moisture and dust from entering the headlight from the seam, ensuring the long-term reliability of core optical components and electrical components in complex environments.

[0027] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A smart automotive headlight control system based on CAN bus communication, comprising a headlight body (1), characterized in that: A heat sink (2) is installed on one side of the headlight body (1). A heat dissipation mechanism is provided inside the heat sink (2). The heat dissipation mechanism includes a heat dissipation fan (5). The heat dissipation fan (5) is installed on one side of the inner wall of the heat sink (2). The headlight body (1) includes a lamp holder (4). A protective lens (10) is provided on one side of the headlight body (1).

2. The intelligent automotive headlight control system based on CAN bus communication as described in claim 1, characterized in that: The heat dissipation mechanism also includes multiple heat dissipation fins (6), which are located at the air outlet of the cooling fan (5). The multiple heat dissipation fins (6) are fixed to the inner wall of the heat dissipation cover (2). Multiple heat conduction pipes (7) are installed on one side of each of the multiple heat dissipation fins (6). One end of each of the multiple heat conduction pipes (7) passes through the heat dissipation cover (2) and extends into the interior of the headlight body (1). One end of each of the multiple heat conduction pipes (7) is connected to the lamp holder (4).

3. The intelligent automotive headlight control system based on CAN bus communication as described in claim 1, characterized in that: A mounting housing (3) is installed on one side of the heat sink (2). A motor (9) is installed on one side of the inner wall of the mounting housing (3). The output end of the motor (9) passes through the heat sink (2) and is connected to the cooling fan (5) for transmission. A control unit (14) is also installed on one side of the inner wall of the mounting housing (3). The control unit (14) is connected to the vehicle communication interface through a wire and is used to automatically adjust the fan speed according to environmental data, thereby achieving the purpose of temperature control.

4. The intelligent automotive headlight control system based on CAN bus communication as described in claim 1, characterized in that: A rain cover (12) is provided on the outside of the headlight body (1), and the two sides of the rain cover (12) are fixed to the headlight body (1) by bolts (13).

5. The intelligent automotive headlight control system based on CAN bus communication as described in claim 1, characterized in that: A sealing gasket (11) is provided at the connection between the protective lens (10) and the headlight body (1). The sealing gasket (11) improves the sealing performance at this point and prevents rainwater from entering.

6. The intelligent automotive headlight control system based on CAN bus communication as described in claim 1, characterized in that: The heat sink (2) has multiple heat dissipation holes (8) on its outer side, which come into contact with the outside air, thereby improving the internal air circulation capacity.

7. The intelligent automotive headlight control system based on CAN bus communication as described in claim 2, characterized in that: The heat pipes (7) are vacuum copper pipes and are filled with phase change material.

8. The intelligent automotive headlight control system based on CAN bus communication as described in claim 3, characterized in that: The control unit (14) is connected to the vehicle's CAN network via a CAN bus interface to receive data from vehicle sensors and ECUs and send control commands.

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