A control method and system for vehicle headlamp illumination, and a vehicle

Abstract

The application provides a vehicle headlamp lighting control method, system and vehicle, and belongs to the field of vehicle light control. A controller outputs an automatic light control signal according to the light intensity of the environment where the vehicle is currently located. When the light intensity is less than a set threshold, the automatic light control signal is valid, otherwise, the automatic light control signal is invalid, and the automatic light control signal is sent to a high beam switch foot position of the controller. The high beam switch foot position is connected with an overtaking gear and a high beam gear in a gear switch, and is used for receiving an overtaking gear signal and a high beam gear signal. The controller controls a high beam lamp according to the signal of the high beam switch foot position. If any signal in the automatic light control signal, the overtaking gear signal and the high beam gear signal in the high beam switch foot position is valid, the high beam lamp is controlled to be lit. The application can avoid the conflict between the automatic light control logic and the overtaking lamp control logic, so as to ensure the personal safety of the driver.

Description

Technical Field

[0001] The present invention relates to a method and system for controlling lighting of vehicle headlights and a vehicle, and belongs to the field of vehicle lighting control. Background Art

[0002] The headlights of existing vehicles include low beam and high beam. The high beam has a long-lasting high beam lighting function and a short-lasting flashing overtaking light warning function according to the rebound time of the gear switch. Therefore, the high beam gear and the overtaking gear of the gear switch of some vehicles use the same switch pin, such as Figure 1 As shown in the figure, the high-beam position and the overtaking position share the same pin. When the switch is moved to either position, the BCM high-beam switch pin is grounded, the voltage level changes, and the BCM controls the high-beam lamp to illuminate. After the gear is rebounded, the BCM high-beam switch pin is no longer grounded, the voltage level is restored, and the BCM controls the high-beam lamp to extinguish.

[0003] Due to advances in automotive electronics and increasing standards, more and more vehicles are equipped with automatic headlight activation. One existing method for controlling vehicle headlights involves adding an AUTO position to the vehicle's gearshift to activate the automatic headlight function. With the AUTO position on, the light intensity sensor collects information about the vehicle's external ambient brightness. If the BCM determines the collected light intensity is less than the set light intensity and the BCM high-beam switch pin is grounded, the high-beam lamps are activated. When the AUTO position is off, the high-beam lamps are activated if the BCM high-beam switch pin is grounded. Otherwise, the high-beam lamps are deactivated.

[0004] For vehicles that have adopted both of the above solutions, if the AUTO gear is on and the light intensity collection value is greater than the set light intensity, it means that the external environment brightness is high and there is no need to turn on the high beam. The BCM controls the high beam to be in the off state and no longer makes judgments based on the signal of the high beam switch pin. At this time, if you need to switch to the overtaking gear, the BCM will no longer be controlled based on the signal of the high beam switch pin, resulting in the failure of the overtaking light function, which in turn affects driving safety. Summary of the Invention

[0005] The purpose of the present invention is to provide a method, system and vehicle for controlling the lighting of vehicle headlights, so as to solve the problem that the overtaking lights cannot be turned on normally under the current automatic lighting control.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a control method for lighting up vehicle headlights, wherein a controller outputs an automatic light control signal according to the light intensity of the current environment in which the vehicle is located. When the light intensity is less than a set threshold, the automatic light control signal is valid; otherwise, the automatic light control signal is invalid, and the automatic light control signal is sent to the high beam switch pin of the controller; the high beam switch pin is also connected to the overtaking gear and the high light gear in the gear switch, for receiving the overtaking gear signal and the high light gear signal; the controller controls the high beam lamp according to the signal of the high beam switch pin, and if it is detected that any of the automatic light control signal, the overtaking gear signal and the high light gear signal in the high beam switch pin is valid, the high beam lamp is controlled to light up.

[0007] The present invention has the following beneficial effects: the present invention outputs an automatic light control signal to the high-beam switch pin. Since the overtaking gear position signal and the high-beam gear position signal are also input to the high-beam switch pin, the controller can automatically and manually control the high-beam lamp based solely on the signal on the high-beam switch pin. This avoids the problem of the overtaking gear position control signal being unable to control the high-beam lamp to illuminate when the automatic light control signal is invalid, that is, the overtaking lamp cannot illuminate normally. The present invention can avoid the problem of overtaking lamp failure caused by conflict between the automatic light control logic and the overtaking lamp control logic without changing the hardware circuit, eliminating driving hazards caused by overtaking lamp failure and ensuring driving safety.

[0008] Furthermore, in the above-mentioned vehicle headlight control method, when the automatic light control signal is valid, the controller outputs a low-level signal to the high-beam switch pin of the controller; when the automatic light control signal is invalid, the controller outputs a floating signal to the high-beam switch pin of the controller.

[0009] When the low beam gear, high beam gear and overtaking gear are valid, low-level signals are used as control signals for the corresponding gears. Therefore, when the automatic light control signal is valid, a low-level signal is also used to facilitate the BCM to control the lighting of the high beam lamps according to the low-level signal.

[0010] Furthermore, in the above-mentioned method for controlling the lighting of the vehicle headlights, the controller also sends an automatic light control signal to the low beam switch pin of the controller; the low beam switch pin is connected to the low beam gear in the gear switch, and is used to receive the low beam gear signal; the controller controls the low beam lamp according to the signal of the low beam switch pin, and if it is detected that any signal of the automatic light control signal and the low beam gear signal in the low beam switch pin is valid, the low beam lamp is controlled to light up.

[0011] Furthermore, in the above-mentioned vehicle headlight control method, when the automatic light control signal is valid, the controller outputs a low-level signal to the low-beam switch pin of the controller; when the automatic light control signal is invalid, the controller outputs a floating signal to the low-beam switch pin of the controller.

[0012] Similarly, for low beam lamps, both the automatic light control signal and the low beam gear signal can control the lighting of the low beam lamps. When the automatic light control signal and the low beam gear signal are valid, they are both low-level signals, which makes it easier for the BCM to control the lighting of the low beam lamps according to the low-level signals.

[0013] The present invention also provides a control system for lighting vehicle headlights, including a controller, a light intensity sensor and a gear switch, wherein the light intensity sensor is connected to the controller, the overtaking gear and the high-beam gear of the gear switch are connected to the high-beam switch pin of the controller, and the controller is further provided with an automatic light control pin, which is connected to the high-beam switch pin of the controller. The controller is used to output an automatic light control signal to the high-beam switch pin of the controller according to the collection result of the light intensity sensor, when the collection result is less than the set threshold, the automatic light control signal is valid, otherwise, the automatic light control signal is invalid; if it is detected that any signal among the automatic light control signal, the overtaking gear signal and the high-beam gear signal in the high-beam switch pin is valid, the high-beam lamp is controlled to be lit.

[0014] The present invention adds an automatic light control output pin to the controller and connects it to the controller's high-beam switch pin. This pin transmits the automatic light control signal to the high-beam switch pin. The overtaking gear position signal and the high-beam gear position signal are also input to the high-beam switch pin, enabling the controller to automatically and manually control the high-beam lamp based on the signals from the high-beam switch pin. This avoids the problem of the overtaking gear position control signal being unable to control the high-beam lamp to illuminate when the automatic light control signal is invalid, thus preventing the overtaking lamp from illuminating properly. The present invention avoids the problem of overtaking lamp failure caused by conflicts between the automatic light control logic and the overtaking lamp control logic, eliminating driving hazards caused by overtaking lamp failure and ensuring driving safety.

[0015] Furthermore, in the above-mentioned vehicle headlight lighting control system, the low beam gear position of the gear switch is connected to the low beam switch pin of the controller, and it is characterized in that the automatic light control pin is also connected to the low beam switch pin of the controller, and the controller controls the low beam lamp according to the signal of the low beam switch pin. If it is detected that any signal of the automatic light control signal and the low beam gear position signal in the low beam switch pin is valid, the low beam lamp is controlled to light up.

[0016] Similarly, the automatic light control pin is also connected to the low beam switch pin of the controller for inputting the automatic light control signal; the low beam gear signal is also input to the low beam switch pin, so that the BCM can control the low beam lamp to light up according to the low-level signal.

[0017] Furthermore, in the above-mentioned vehicle headlight lighting control system, the light intensity sensor is arranged at the front of the vehicle to collect the light intensity of the environment in front of the driver.

[0018] The light intensity sensor is mainly used to collect the light intensity in front of the driver and decide whether to turn on the headlights based on the light intensity environment in front of the driver.

[0019] The present invention also provides a vehicle with a headlamp lighting function, wherein the vehicle adopts the above-mentioned vehicle headlamp lighting control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The schematic diagram of the headlight control for an existing vehicle;

[0021] Figure 2 This is a schematic diagram of the improved headlamp control principle of the present invention. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0023] Vehicle headlamp lighting control system embodiment:

[0024] The schematic diagram of the headlight control principle of existing vehicles is as follows: Figure 1 As shown, pin 3 of the shift switch is connected to the low-beam switch pin of the vehicle's BCM (body control module), which inputs the low-beam position signal to the BCM. Pin 4 of the shift switch is connected to the automatic light switch pin of the vehicle's BCM (body control module), which inputs the automatic light function on / off signal to the BCM, enabling automatic light control. Pin 16 of the shift switch is connected to the high-beam switch pin of the BCM, which inputs the high-beam position signal to the BCM. In addition, the light intensity sensor is connected to the BCM to input light intensity data, which controls the connection between the low-beam and high-beam headlights.

[0025] The gear switch has six gears: AUTO, OFF, low beam, low beam, high beam, and overtaking. AUTO and OFF control whether the headlight lighting function is turned on. When the gear is turned to AUTO, pin 4 of the light gear switch is connected to ground pin 19, and the BCM automatic light switch pin is grounded, becoming a low level, which is called the automatic light switch is valid. When the gear is turned to OFF, pin 4 of the light gear switch is no longer connected to ground pin 19, the BCM automatic light switch pin is floating, and the level is restored, which is called the automatic light switch is invalid.

[0026] The light position switch controls the illumination of corresponding lamps in the low, low, high, and overtaking positions. Both the high and overtaking positions illuminate the high beam, differing in their rebound time. The high beam position has a longer rebound time, enabling the high beam to illuminate continuously. The overtaking position has a shorter rebound time, enabling the high beam to flash briefly, prompting the vehicle to pass. Therefore, using the same position switch pin 16 for both high and overtaking positions allows the two to be distinguished. When the gear switch is turned to the low beam position, pin 3 of the gear switch is connected to the ground pin 19, the BCM low beam switch pin is grounded, and the level becomes low, which is called the low beam switch is valid; when the gear switch is turned to the high beam position, pin 16 of the gear switch is connected to the ground pin 19, the BCM high beam switch pin is grounded, and the level becomes low, which is called the high beam switch is valid; when the gear switch is turned to the overtaking position, pin 16 of the gear switch is connected to the ground pin 19, the BCM high beam switch pin is grounded, and the level becomes low, which is also called the high beam switch is valid.

[0027] The light intensity sensor collects the light intensity of the vehicle's external environment and transmits it to the BCM. The BCM determines: if the collected value of the light intensity sensor is lower than the set threshold, it means that the brightness of the external environment is low and the headlights need to be turned on, which is called the light intensity sensor being effective; otherwise, it means that the brightness of the external environment is high and the headlights do not need to be turned on, which is called the light intensity sensor being invalid.

[0028] like Figure 2 As shown, the present invention improves upon this by adding an automatic light control pin to the vehicle's BCM and connecting it to the high-beam switch pin. When the BCM detects that the automatic light switch is active and the light intensity sensor is active, the automatic light control pin outputs a low level to the high-beam switch pin, activating the high-beam switch. Otherwise, the automatic light control pin remains floating. When the BCM detects that the high-beam switch pin is active, the high-beam lamps are illuminated.

[0029] When the automatic light switch is enabled, if the light intensity sensor is active, indicating that the environment is dark and the headlights need to be turned on, the BCM automatic light control pin outputs a low level to the high-beam switch pin. The BCM detects that the high-beam switch is enabled and controls the high-beam lighting, thus implementing the automatic lighting function. When the automatic light switch is enabled, if the light intensity sensor is inactive, indicating that the environment is bright and the headlights do not need to be turned on, the BCM automatic light control pin is left floating, and the high-beam lighting does not automatically turn on. Manually shifting the gear switch to the high-beam position or the overtaking position turns the high-beam lighting on continuously or briefly, enabling manual headlight control by the driver. Similarly, when the automatic light switch is disabled, regardless of the light intensity sensor's readings, the BCM automatic light control pin remains floating, and the high-beam lighting does not automatically turn on. The driver can still change the vehicle's headlight status by shifting the gear switch.

[0030] As another embodiment, the automatic light control pin can be connected to the low beam switch pin to achieve automatic light control of the low beam function. The low beam position corresponding to the low beam switch pin has only one low beam function. Therefore, when the automatic light switch is enabled and the light intensity sensor is enabled, the low beam will automatically illuminate. In other cases, the driver can manually switch to the low beam position to illuminate the low beam lamp.

[0031] From the above, it can be seen that the present invention can solve the problem of overtaking light failure caused by the logical conflict between the vehicle's overtaking function and the automatic light control function. The hardware change of the present invention is only to add a connecting wire. The complexity of the change is relatively low, and there is no need to change the vehicle's gear switch, which effectively reduces the cost of the change.

[0032] Example of a method for controlling vehicle headlight lighting:

[0033] The specific implementation of the vehicle headlamp lighting control method of the present invention has been clearly explained in the above-mentioned vehicle headlamp lighting control system embodiment, so it will not be repeated here.

[0034] Vehicle Example:

[0035] The vehicle with headlamp lighting function of the present invention adopts the above-mentioned vehicle headlamp lighting control system. The vehicle headlamp lighting control system has been clearly explained in the above-mentioned vehicle headlamp lighting control system embodiment, so it will not be repeated here.

Claims

1. A method for controlling the lighting of vehicle headlights, characterized in that: The controller outputs an automatic light control signal according to the light intensity of the vehicle's current environment. When the light intensity is less than the set threshold, the automatic light control signal is valid; otherwise, the automatic light control signal is invalid, and the automatic light control signal is sent to the high beam switch pin of the controller; the high beam switch pin is also connected to the overtaking gear and the high light gear in the gear switch, for receiving the overtaking gear signal and the high light gear signal; the controller controls the high beam lamp according to the signal of the high beam switch pin, and if it is detected that any of the automatic light control signal, the overtaking gear signal and the high light gear signal in the high beam switch pin is valid, the high beam lamp is controlled to light up.

2. The method for controlling lighting of vehicle headlights according to claim 1, wherein: When the automatic light control signal is valid, the controller outputs a low-level signal to the high-beam switch pin of the controller. When the automatic light control signal is invalid, the controller outputs a floating signal to the high-beam switch pin of the controller.

3. The vehicle headlamp lighting control method according to claim 1 or 2, characterized in that: The controller also sends an automatic light control signal to the low beam switch pin of the controller; the low beam switch pin is connected to the low beam gear in the gear switch for receiving the low beam gear signal; the controller controls the low beam lamp according to the signal of the low beam switch pin, and if it is detected that any signal of the automatic light control signal and the low beam gear signal in the low beam switch pin is valid, the low beam lamp is controlled to light up.

4. The method for controlling lighting of vehicle headlights according to claim 3, wherein: When the automatic light control signal is valid, the controller outputs a low-level signal to the low-beam switch pin of the controller; when the automatic light control signal is invalid, the controller outputs a floating signal to the low-beam switch pin of the controller.

5. A vehicle headlamp lighting control system, comprising a controller, a light intensity sensor, and a gear switch, wherein the light intensity sensor is connected to the controller, and the overtaking gear and the high-beam gear of the gear switch are connected to the high-beam switch pin of the controller, characterized in that: The controller is also provided with an automatic light control pin, which is connected to the high beam switch pin of the controller. The controller is used to output an automatic light control signal to the high beam switch pin of the controller according to the collection result of the light intensity sensor. When the collection result is less than the set threshold, the automatic light control signal is valid, otherwise, the automatic light control signal is invalid; if it is detected that any signal among the automatic light control signal, the overtaking gear signal and the high beam gear signal in the high beam switch pin is valid, the high beam lamp is controlled to light up.

6. The vehicle headlamp lighting control system according to claim 5, wherein the low beam position of the gear switch is connected to the low beam switch pin of the controller, characterized in that: The automatic light control pin is also connected to the low beam switch pin of the controller. The controller controls the low beam lamp according to the signal of the low beam switch pin. If it is detected that any signal of the automatic light control signal and the low beam gear signal in the low beam switch pin is valid, the low beam lamp is controlled to light up.

7. The vehicle headlamp lighting control system according to claim 5 or 6, characterized in that: The light intensity sensor is arranged at the front of the vehicle and is used to collect the light intensity of the environment in front of the driver.

8. A vehicle with a headlight lighting function, characterized in that: The vehicle adopts the vehicle headlamp lighting control system according to any one of claims 5 to 7.

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