Vehicle lamp control system for tractor and towed vehicle
The integration of electronic fuses with a central processor in vehicle lighting systems addresses the maintenance challenges of physical fuse replacement by enabling rapid fault recovery and system integration, enhancing reliability and reducing space and cost.
Patent Information
- Application Number
- CN202422058331.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-23
AI Technical Summary
In the prior art, when the headlight control system of the tractor and the tractor is overcurrent or short-circuited, the tow light module needs to be repaired and the physical fuse is replaced, which increases maintenance costs and time.
The electronic fuse is coupled with the control subsystem of the target tractor, and the electronic fuse is controlled through the central processor to achieve rapid protection of overcurrent and short circuits, cancel the physical fuse and a special control ECU, and integrate it into the chassis control system.
Reduces maintenance costs and time, improves the integration and flexibility of the headlight control system, saves space, extends service life, and reduces maintenance costs.
Smart Images
Figure CN223110219U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle lamp control, and particularly to a vehicle lamp control system for a tractor and a towed vehicle. Background Art
[0002] When a tractor tows a towed vehicle, the tail lamp of the towed vehicle must synchronously respond to various light signals emitted by the tractor. For example, when the tractor needs to turn and its turn signal lamp is lit, the turn signal lamp of the towed vehicle must be driven and lit synchronously. In the prior art, in order to achieve the synchronous response of the tail lamp of the tractor and the tail lamp of the towed vehicle, a possible implementation method is to distribute power to the trailer lamp module through a traditional physical fuse from the vehicle body power supply of the tractor, and then connect the turn signal lamp and brake lamp circuits of the tractor and the towed vehicle together through the trailer lamp module. In this way, when an overcurrent or short circuit occurs in the trailer lamp module, after the physical fuse melts, if its function needs to be restored, both the trailer lamp module needs to be repaired and the physical fuse needs to be replaced, which will increase the maintenance cost and time.
[0003] Therefore, it is urgent to study a vehicle lamp control system for a tractor and a towed vehicle that has a short repair time for relevant circuits when an overcurrent or short circuit occurs in the trailer lamp module. Summary of the Utility Model
[0004] This specification provides a vehicle lamp control system for a tractor and a towed vehicle to overcome at least one technical problem existing in the related art.
[0005] According to an embodiment of this specification, a vehicle lamp control system for a tractor and a towed vehicle is provided, including:
[0006] An electronic fuse physically coupled to the control subsystem of the target tractor; wherein, the target tractor is used to tow a towed vehicle, the control subsystem is used to control the corresponding sub-functions of the target tractor, the positive input terminal of the electronic fuse is connected to the positive power supply terminal of the power supply provided on the target tractor, and the negative output terminal of the electronic fuse is connected to one end of the lamp function unit of the towed vehicle;
[0007] The headlight control system further includes a central processing unit. The first port of the central processing unit is connected to the first port of the chip built in the electronic fuse through a first signal line, and the first signal line is used to transmit the control signal sent by the central processing unit to the built-in chip. The second port of the central processing unit is connected to the second port of the chip built in the electronic fuse through a second signal line, and the second signal line is used to transmit the voltage signal fed back by the built-in chip to the central processing unit. The third port of the central processing unit is connected to the third port of the chip built in the electronic fuse through a third signal line, and the third signal line is used to transmit the current signal fed back by the built-in chip to the central processing unit. The fourth port of the central processing unit is connected to the fourth port of the chip built in the electronic fuse through a fourth signal line, and the fourth signal line is used to transmit the temperature signal fed back by the built-in chip to the central processing unit.
[0008] The headlight control system further includes a power management chip. The positive input terminal of the power management chip is connected to the positive power supply terminal of the power supply, the output terminal of the power management chip is connected to the positive power supply terminal of the central processing unit, and the negative output terminal of the central processing unit, the negative output terminal of the power management chip, and the other end of the headlight functional unit of the towed vehicle are respectively connected to the negative power supply terminal of the power supply.
[0009] Preferably, the control subsystem is one of the braking system, suspension system, and steering system of the target tractor.
[0010] Preferably, the electronic fuse includes a main switch Q1, a current sampling resistor R1, a first voltage sampling voltage-dividing resistor R2, a second voltage sampling voltage-dividing resistor R3, a temperature sampling resistor R4, and a current operational amplifier U1. Among them, the main switch Q1 is used to establish or disconnect the connection between the power supply and the headlight function unit of the towed vehicle. The main switch Q1 uses an NMOS transistor. The gate of the main switch Q1 is connected to the first port of the central processor through the first signal line. The drain of the main switch Q1 is connected to the positive power supply terminal of the power supply. The source of the main switch Q1 is connected to the first end of the current sampling resistor R1. The first end of the current sampling resistor R1 is also connected to the non-inverting input terminal of the current operational amplifier. The second end of the current sampling resistor R1 is connected to the inverting input terminal of the current operational amplifier. The output terminal of the current operational amplifier is connected to the third port of the central processor through the third signal line. The second end of the current sampling resistor R1 is also connected to the first end of the first voltage sampling voltage-dividing resistor R2. The second end of the first voltage sampling voltage-dividing resistor R2 is connected to the first end of the second voltage sampling voltage-dividing resistor R3. The second end of the second voltage sampling voltage-dividing resistor R3 is grounded. The connection node between the second end of the current sampling resistor R1 and the first end of the first voltage sampling voltage-dividing resistor R2 is connected to the headlight function unit. The temperature sampling resistor R4 is placed near the main switch Q1.
[0011] The beneficial effects of the embodiments of this specification are as follows: The technical solution of this application provides a headlight control system for a tractor and a towed vehicle. In this headlight control system, an electronic fuse is used to replace the traditional physical fuse, and the electronic fuse is organically coupled with the control subsystem of the target tractor. That is, when the towed light module has an overcurrent or short circuit, after the physical fuse used in the prior art melts, if its function needs to be restored, it is necessary to repair the towed light module and replace the physical fuse, which will increase the maintenance cost and time. However, in the technical solution of this application, the electronic fuse improves the protection accuracy of the trailer control module and eliminates the fuse replacement caused by overcurrent or short circuit melting. Moreover, in the technical solution of this application, the electronic fuse is coupled or integrated with the control subsystem of the target tractor, and the redundant computing power of the central processor in this control subsystem can be used for the headlight control work of the tractor and the towed vehicle, which also solves the problems of complex integration degree, high cost, and inability to be flexibly configured in the current domain control system. At the same time, compared with the traditional towed light module, the physical fuse and the dedicated control ECU are cancelled, saving space; compared with the traditional towed light module, it can be reused, improving the service life and reducing the maintenance cost; compared with the domain control product, it is convenient to integrate, has strong operability, and is easy to implement. Brief Description of the Drawings
[0012] To more clearly illustrate the technical solutions in the embodiments of this specification or the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0013] Figure 1 It is a schematic structural diagram of a headlight control system for a tractor and a towed vehicle provided in the embodiments of this specification;
[0014] Figure 2 It is a schematic connection diagram inside an electronic fuse module used in a headlight control system for a tractor and a towed vehicle provided in the embodiments of this specification.
[0015] Among them, 1 indicates that the system powers the control subsystem, 2 indicates that the system powers the power management pre-driver chip, 3 indicates that the power management pre-driver chip powers the central processing unit, 4 indicates the interaction between the power management pre-driver chip and the chassis function, 5 indicates the interaction between the central processing unit and the chassis function, 6 indicates the control signal from the central processing unit to the electronic fuse, 7 indicates the voltage feedback signal from the electronic fuse to the central processing unit, 8 indicates the current feedback signal from the electronic fuse to the central processing unit, 9 indicates the temperature feedback signal from the electronic fuse to the central processing unit, 10 indicates that the system powers the electronic fuse, and 11 indicates that the electronic fuse powers the trailer light function. Detailed implementation manners
[0016] The following will clearly and completely describe the technical solutions in the embodiments of this specification with reference to the drawings in the embodiments of this specification. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.
[0017] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of this specification and the drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.
[0018] As described in the background art section above, when a towing vehicle towes a towed vehicle, the tail lights of the towed vehicle must synchronously respond to various lighting signals emitted by the towing vehicle. For example, when the towing vehicle needs to turn on its turn signal, the turn signal of the towed vehicle must be driven to turn on synchronously. In the prior art, the first method is to use a traditional physical fuse to transfer the vehicle body power supply to the trailer light module. When an overcurrent or short circuit occurs in the trailer light module, the physical fuse is blown. To restore the function, both the trailer light module needs to be repaired and the physical fuse needs to be replaced, which increases the maintenance cost and time. Moreover, this technology requires additional assembly space and control signals for the control module. The second method is to use domain control technology. The on-off and power supply of the trailer light module are controlled by replacing the traditional physical fuse with an internal electronic fuse. The electronic fuse does not need to be replaced and has higher precision. However, due to the high pre-research cost of domain control and the economic benefits only when there are many loads integrated, the implementation of the trailer light module depends on the research project establishment of the entire domain control.
[0019] In view of the technical problems existing in the prior art described in the above paragraph, the embodiments of this specification disclose a lighting control system for a towing vehicle and a towed vehicle, which will be described in detail below.
[0020] Figure 1 The following is a schematic structural diagram of a lighting control system for a towing vehicle and a towed vehicle provided by an embodiment of this specification. As Figure 1 shown, the lighting control system may include:
[0021] An electronic fuse 1 physically coupled to the control subsystem of the target towing vehicle; wherein, the target towing vehicle is used to tow the towed vehicle, the control subsystem 2 is used to control the corresponding sub-functions of the target towing vehicle, the positive input terminal of the electronic fuse 1 is connected to the positive power supply terminal of the power supply provided on the target towing vehicle, and the negative output terminal of the electronic fuse 1 is connected to one end of the lighting function unit 4 of the towed vehicle. In this step, the electronic fuse 1 is coupled to the control subsystem of the target towing vehicle, which can be understood as "integrating" the electronic fuse 1 with the control subsystem of the target towing vehicle. For example, as described below, the control subsystem of the target towing vehicle sets a corresponding central processing unit to perform its own corresponding control functions. To enable the electronic fuse 1 to function, through circuit settings, the electronic fuse 1 can be made to receive the control of the central processing unit, that is, the redundant computing power of the central processing unit is used for the lighting control work of the towing vehicle and the towed vehicle. Next, the meaning of the "control subsystem" of the target towing vehicle will be explained, that is, there are various control subsystems on the vehicle, such as the braking system, the suspension system, the steering system, etc. The "control subsystem" in the above connection relationship can refer to one of these control systems.
[0022] As Figure 1As shown, the vehicle lamp control system further includes a central processing unit 3. The first port of the central processing unit 3 is connected to the first port of the chip built in the electronic fuse 1 through a first signal line. The first signal line is used to transmit the control signal sent by the central processing unit 3 to the built-in chip. The second port of the central processing unit 3 is connected to the second port of the chip built in the electronic fuse 1 through a second signal line. The second signal line is used to transmit the voltage signal fed back by the built-in chip to the central processing unit 3. The third port of the central processing unit 3 is connected to the third port of the chip built in the electronic fuse 1 through a third signal line. The third signal line is used to transmit the current signal fed back by the built-in chip to the central processing unit 3. The fourth port of the central processing unit 3 is connected to the fourth port of the chip built in the electronic fuse 1 through a fourth signal line. The fourth signal line is used to transmit the temperature signal fed back by the built-in chip to the central processing unit 3.
[0023] The vehicle lamp control system further includes a power management chip 5. The positive input terminal of the power management chip 5 is connected to the positive power supply terminal of the power supply. The output terminal of the power management chip 5 is connected to the positive power supply terminal of the central processing unit 3. The negative output terminal of the central processing unit 3, the negative output terminal of the power management chip 5 and the other end of the vehicle lamp function unit 4 of the towed vehicle are respectively connected to the negative power supply terminal of the power supply.
[0024] In the above two descriptions, the connection relationship between the central processing unit 3 and the electronic fuse 1, the connection relationship between the electronic fuse 1 and the vehicle lamp function unit of the towed vehicle, and the connection relationship between each unit and the power supply are mainly described. In the above connection relationship, through the second signal line, the third signal line and the fourth signal line, the electronic fuse 1 can feed back voltage, current and temperature signals to the central processing unit 3. These signals can be used as the basis for the central processing unit 3 to control the electronic fuse 1. According to the actual situation, the central processing unit 3 can send corresponding control signals to the chip built in the electronic fuse 1 through the first signal line to realize the control of the electronic fuse 1. Thus, when overcurrent, overheating or short-circuit failure occurs, the electronic fuse has the ability to quickly turn off. After the fault is removed, it can return to normal operation without replacing the fuse again, reducing the cost and time required for maintenance. Moreover, the switch control module and physical fuse of the traditional tow vehicle lamp are uniformly replaced by the electronic fuse and integrated into the chassis control system. The tow vehicle lamp function no longer requires a separate controller or additional vehicle-to-vehicle interconnection signals, which is beneficial to vehicle lightweighting and function integration.
[0025] Considering the capacitive load characteristics of the trailer lamp, the control signal can be selected with the characteristics of a soft start switch to minimize the inrush current during the turn-on process; the voltage feedback signal, current feedback monitoring, and temperature feedback signal can facilitate the central processing unit to read the electrical state of the electronic fuse in real time and adopt corresponding control methods, improving the controllability and accuracy. When overcurrent, over-temperature, or short-circuit failure occurs, the electronic fuse has the ability to quickly turn off. After the fault is removed, it can resume normal operation without replacing the fuse, reducing the cost and time required for maintenance. The trailer lamp is integrated into the control subsystem, such as the suspension control system, and the overall solution is simple, the control method is not complex, easy to implement, and easy to achieve.
[0026] The technical solution of this application provides a headlamp control system for a tractor and a trailed vehicle. In this headlamp control system, an electronic fuse is used to replace the traditional physical fuse, and the electronic fuse is organically coupled with the control subsystem of the target tractor. That is, when an overcurrent or short circuit occurs in the trailer lamp module, in the prior art, after the physical fuse melts, if its function needs to be restored, both the trailer lamp module needs to be repaired and the physical fuse needs to be replaced, which will increase the maintenance cost and time. However, in the technical solution of this application, the electronic fuse improves the protection accuracy of the trailer control module and eliminates the fuse replacement caused by overcurrent or short-circuit melting. Moreover, in the technical solution of this application, the electronic fuse is coupled or integrated with the control subsystem of the target tractor, and the redundant computing power of the central processing unit in this control subsystem can be used for the headlamp control work of the tractor and the trailed vehicle, which also solves the problems of complex integration degree, high cost, and inability to be flexibly configured in the current domain control system. At the same time, compared with the traditional trailer lamp module, the physical fuse and the dedicated control ECU are cancelled, saving space; compared with the traditional trailer lamp module, it can be reused, improving the service life and reducing the maintenance cost; compared with the domain control product, it is convenient to integrate, has strong operability, and is easy to achieve.
[0027] As Figure 2 shown, Figure 2 It is a schematic diagram of the internal connection relationship of an electronic fuse module used in a headlamp control system for a tractor and a trailed vehicle provided in the embodiments of this specification. As Figure 2As shown in the figure, the electronic fuse includes a main switch Q1, a current sampling resistor R1, a first voltage sampling voltage-dividing resistor R2, a second voltage sampling voltage-dividing resistor R3, a temperature sampling resistor R4, and a current operational amplifier U1. Among them, the main switch is used to establish or disconnect the connection between the power supply and the headlight function unit of the towed vehicle. The main switch uses an NMOS transistor. The gate of the main switch Q1 is connected to the first port of the central processor through the first signal line. The drain of the main switch Q1 is connected to the positive power supply terminal of the power supply. The source of the main switch Q1 is connected to the first end of the current sampling resistor R1. The first end of the current sampling resistor R1 is also connected to the non-inverting input terminal of the current operational amplifier. The second end of the current sampling resistor R1 is connected to the inverting input terminal of the current operational amplifier. The output terminal of the current operational amplifier is connected to the third port of the central processor through the third signal line. The second end of the current sampling resistor R1 is also connected to the first end of the first voltage sampling voltage-dividing resistor R2. The second end of the first voltage sampling voltage-dividing resistor R2 is connected to the first end of the second voltage sampling voltage-dividing resistor R3. The second end of the second voltage sampling voltage-dividing resistor R3 is grounded. The connection node between the second end of the current sampling resistor R1 and the first end of the first voltage sampling voltage-dividing resistor R2 is connected to the headlight function unit. The temperature sampling resistor R4 is placed near the main switch Q1.
[0028] Those of ordinary skill in the art can understand that the drawings are only schematic diagrams of an embodiment, and the modules or processes in the drawings are not necessarily essential for implementing the present invention.
[0029] Those of ordinary skill in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description of the embodiment, or can be correspondingly changed to be located in one or more devices different from the present embodiment. The modules in the above embodiments can be combined into one module, or can be further split into multiple sub-modules.
[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A headlight control system for a towing vehicle and a towed vehicle, characterized in that, The headlight control system includes: An electronic fuse physically coupled to the control subsystem of the target tractor; wherein, the target tractor is used to tow the towed vehicle, the control subsystem is used to perform functional control on the corresponding sub-functions of the target tractor, the positive input terminal of the electronic fuse is connected to the positive power supply terminal of the power supply provided on the target tractor, and the negative output terminal of the electronic fuse is connected to one end of the headlight function unit of the towed vehicle; The headlight control system further includes a central processing unit. The first port of the central processing unit is connected to the first port of the chip built in the electronic fuse through a first signal line, and the first signal line is used to transmit the control signal sent by the central processing unit to the built-in chip; the second port of the central processing unit is connected to the second port of the chip built in the electronic fuse through a second signal line, and the second signal line is used to transmit the voltage signal fed back by the built-in chip to the central processing unit; the third port of the central processing unit is connected to the third port of the chip built in the electronic fuse through a third signal line, and the third signal line is used to transmit the current signal fed back by the built-in chip to the central processing unit; the fourth port of the central processing unit is connected to the fourth port of the chip built in the electronic fuse through a fourth signal line, and the fourth signal line is used to transmit the temperature signal fed back by the built-in chip to the central processing unit; The headlight control system further includes a power management chip. The positive input terminal of the power management chip is connected to the positive power supply terminal of the power supply, the output terminal of the power management chip is connected to the positive power supply terminal of the central processing unit, and the negative output terminal of the central processing unit, the negative output terminal of the power management chip, and the other end of the headlight function unit of the towed vehicle are respectively connected to the negative power supply terminal of the power supply.
2. The headlight control system for a towing vehicle and a towed vehicle according to claim 1, characterized in that, The control subsystem is one of the braking system, suspension system, and steering system of the target tractor.
3. The headlight control system for a towing vehicle and a towed vehicle according to claim 1, characterized in that, The electronic fuse includes a main switch Q1, a current sampling resistor R1, a first voltage sampling voltage-dividing resistor R2, a second voltage sampling voltage-dividing resistor R3, a temperature sampling resistor R4, and a current operational amplifier U1. Among them, the main switch Q1 is used to establish or disconnect the connection between the power supply and the headlight function unit of the towed vehicle. The main switch Q1 is an NMOS transistor. The gate of the main switch Q1 is connected to the first port of the central processor through the first signal line. The drain of the main switch Q1 is connected to the positive power supply terminal of the power supply. The source of the main switch Q1 is connected to the first end of the current sampling resistor R1. The first end of the current sampling resistor R1 is also connected to the non-inverting input terminal of the current operational amplifier. The second end of the current sampling resistor R1 is connected to the inverting input terminal of the current operational amplifier. The output terminal of the current operational amplifier is connected to the third port of the central processor through the third signal line. The second end of the current sampling resistor R1 is also connected to the first end of the first voltage sampling voltage-dividing resistor R2. The second end of the first voltage sampling voltage-dividing resistor R2 is connected to the first end of the second voltage sampling voltage-dividing resistor R3. The second end of the second voltage sampling voltage-dividing resistor R3 is grounded. The connection node between the second end of the current sampling resistor R1 and the first end of the first voltage sampling voltage-dividing resistor R2 is connected to the headlight function unit. The temperature sampling resistor R4 is placed near the main switch Q1.