Pure electric light truck parking safety auxiliary strategy method

Abstract

The invention discloses a pure electric light truck parking safety auxiliary strategy method, which is executed by a vehicle control unit (VCU), an instrument and a vehicle body controller (BCM) and comprises the following steps that after the vehicle is triggered to enter parking safety, when the vehicle is in an OFF gear, the vehicle body controller (BCM) judges that a hand brake is in a non-pulled state through the instrument, the vehicle body controller (BCM) controls double flash and whistling, and the vehicle body controller (BCM) stops starting the parking safety. Reminding a car owner to pull the brake; when a vehicle door is opened or a mechanical brake is pulled or a safety belt state is released, the vehicle control unit (VCU) controls the gear to return to the neutral gear (N gear) and sends a CAN signal to the instrument at the same time; after the instrument receives a parking safety triggering signal, if a hand brake is judged not to be pulled, a character and buzzing alarm prompt is performed; through systematic intervention and active control, potential dangers caused by misoperation are eliminated fundamentally, and the safety level of the whole vehicle is improved.

Description

Technical Field

[0001] This invention relates to a method for a parking safety assistance strategy for pure electric light trucks, belonging to the field of parking safety assistance technology. Background Technology

[0002] Existing pure electric light trucks, especially those equipped with mechanical handbrakes, pose safety hazards due to the lack of automatic parking functionality. Currently, these vehicles rely entirely on driver habits, and issues such as forgetting to engage the handbrake after parking, causing the vehicle to roll away, exiting the vehicle without engaging Park (P) gear, or crawling forward with doors open or seatbelts unfastened are common, posing significant risks and increasing the risk of accidents.

[0003] In other words, to overcome the shortcomings of existing technologies that rely on human intervention, it is necessary to develop an intelligent safety assistance strategy that can fundamentally eliminate potential dangers caused by operational errors and improve the overall vehicle safety level through systematic intervention and active control. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a method for a parking safety assistance strategy for pure electric light trucks, which fundamentally eliminates potential dangers caused by operational errors and improves the overall vehicle safety level through systematic intervention and active control; it can overcome the shortcomings of the prior art.

[0005] The objective of this invention is achieved through the following technical solution: This invention discloses a method for a parking safety assistance strategy for pure electric light trucks. The method is executed by the vehicle control unit (VCU), instrument cluster, and body control system (BCM) and includes the following steps: Step 1: Design the trigger conditions for entering the parking safety VCU_ParkingSafetySwitch=1; Step 2, Control Execution After the parking safety is triggered and the vehicle is in the OFF position, the Body Control Controller (BCM) will detect through the instrument panel that the handbrake is not engaged. The BCM will then activate the hazard lights and sound the horn to remind the driver to engage the handbrake. When the car door is opened, the mechanical handbrake is engaged, or the seatbelt is unfastened, the vehicle control unit (VCU) returns the gear to neutral (N) and sends a CAN signal to the instrument panel. After receiving the safety signal to trigger the parking system, if the instrument panel determines that the handbrake is not engaged, it will issue a text prompt and sound an alarm. When the vehicle is powered on but not driven, and then powered off directly, the vehicle control unit (VCU) controls the gear to return to neutral and sends a CAN signal to the instrument panel. After receiving the trigger parking safety signal, if the instrument panel determines that the handbrake is not engaged, it will issue a text prompt and sound an alarm. The body control unit (BCM) controls the sound and light reminder. When the vehicle is in driving mode, if the door is not closed or the seat belt is not fastened, the vehicle control unit (VCU) will prevent the vehicle from entering creep mode and will only respond to the throttle. When the mechanical handbrake is engaged, the vehicle control unit (VCU) will prevent the vehicle from responding to the throttle. Step 3: Parking safety deactivated.

[0006] In step one above, a motion trigger flag S1 is designed inside the vehicle control unit (VCU): When the ignition switch is turned on, i.e., when IGOON is activated, S1=1; When the vehicle speed is ≥1km / h, the instantaneous movement action signal is triggered, or the ignition switch is turned off, i.e., IGOFF from IGO, then S1=2; After S1=2 is triggered, if the current vehicle speed is <1km / h and the seat belt is unfastened, the door is opened, or the mechanical handbrake is engaged, S1=3.

[0007] The above-mentioned conditions for triggering parking safety include the simultaneous fulfillment of the following three conditions: (1) S1=2; (2) Current vehicle speed <1km / h; (3) The seat belt is unfastened or the door is opened or the mechanical handbrake is engaged or the vehicle is currently in IGOFF mode.

[0008] The aforementioned condition for releasing parking safety is that it is released after shifting into gear.

[0009] As mentioned above, when the Vehicle Control Unit (VCU) triggers a "parking safety" signal, and the instrument panel detects that the handbrake is not engaged, the instrument panel will trigger a text prompt and a buzzer alarm. The Body Control Controller (BCM) will then control the audible and visual alarms. The audible and visual alarms must continue to sound when the vehicle is in the ON position, and the alarm duration must be no less than 3 minutes when the vehicle is in the OFF position. When the door is opened under high voltage in the ON position, the audible and visual alarm duration must be no less than 5 minutes to remind the user that the vehicle is not powered off.

[0010] As mentioned above, if the Body Control Controller (BCM) determines that the handbrake is not engaged when it is in the OFF position, the BCM will control the continuous horn and hazard lights. If the handbrake signal is lost, the BCM will control the alarm to stop.

[0011] Compared with the prior art, the beneficial effects of the present invention are: This invention provides parking safety assistance strategies covering various vehicle manufacturers, effectively improving vehicle owner safety. Specifically, if the handbrake is not engaged in the OFF position, the Body Control Module (BCM) will activate hazard lights and sound the horn, along with instrument panel prompts to guide the driver to engage the handbrake. It also provides auxiliary protection against unconventional parking habits after driving, such as: unfastening the seatbelt and exiting the vehicle without disengaging from drive; the Vehicle Control Unit (VCU) will directly control the vehicle to shift into neutral. If the vehicle is in use but not yet driven, it provides audible and visual reminders to engage the handbrake and to deactivate the high-voltage switch. Furthermore, it includes design protection against inadequate pre-driving preparation (seatbelt, doors, handbrake): creep restriction and no throttle response when the handbrake is engaged.

[0012] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0013] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will now be described in further detail with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the motion trigger flag S1 state transition within the vehicle control unit (VCU) of this invention.

[0014] Figure 2 This is a flowchart illustrating the vehicle safety design of the vehicle control unit (VCU) of this invention. Detailed Implementation

[0015] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0016] like Figures 1-2 As shown, this invention discloses a method for a parking safety assistance strategy for a pure electric light truck. This method is executed by the vehicle control unit (VCU), instrument cluster, and body control system (BCM) and includes the following steps: Step 1: Design the trigger conditions for entering the parking safety VCU_ParkingSafetySwitch=1; A motion trigger flag S1 is designed inside the vehicle control unit (VCU): When the ignition switch is turned on, i.e., when IGOON is activated, S1=1; When the vehicle speed is ≥1km / h, the instantaneous movement action signal is triggered, or the ignition switch is turned off, i.e., IGOFF from IGO, then S1=2; After S1=2 is triggered, if the current vehicle speed is <1km / h and the seat belt is unfastened, the door is opened, or the mechanical handbrake is engaged, S1=3.

[0017] Triggering parking safety requires that the following three conditions be met simultaneously: (1) S1=2; (2) Current vehicle speed <1km / h; (3) The seat belt is unfastened or the door is opened or the mechanical handbrake is engaged or the vehicle is currently in IGOFF mode.

[0018] Step 2, Control Execution After the parking safety is triggered and the vehicle is in the OFF position, the Body Control Controller (BCM) detects through the instrument panel that the handbrake is not engaged. The instrument panel then triggers a text prompt and a buzzer alarm, and the Body Control Controller (BCM) controls the hazard lights and horn to remind the driver to engage the handbrake. When the door is opened, the mechanical handbrake is engaged, or the seatbelt is unfastened, the vehicle control unit (VCU) returns the gear to neutral (N) and simultaneously sends a CAN signal to the instrument cluster. Upon receiving the parking safety signal, if the instrument cluster determines that the handbrake is not engaged, it will trigger a text prompt and a buzzer alarm. The instrument cluster will also send a signal to the body control unit (BCM). Upon receiving the handbrake signal from the instrument cluster, the body control unit (BCM) will issue an audible and visual warning. When the vehicle is powered on but not driven, and then powered off directly, the vehicle control unit (VCU) controls the gear to return to neutral and sends a CAN signal to the instrument panel. After receiving the parking safety signal, if the instrument panel determines that the handbrake is not engaged, it will trigger a text prompt and a buzzer alarm. The body control unit (BCM) will control the sound and light reminder. When the vehicle is in driving mode, if the door is not closed or the seat belt is not fastened, the vehicle control unit (VCU) will prevent the vehicle from entering creep mode and will only respond to the throttle. When the mechanical handbrake is engaged, the vehicle control unit (VCU) will prevent the vehicle from responding to the throttle, meaning there will be no creep torque. Step 3, Parking Safety Release; The condition for releasing parking safety is that it is released after shifting into gear. Specifically, after meeting the conditions for entering parking safety, press the accelerator in IGN, VCU will start the vehicle with VCU_ParkingSafetyRelease=1, and the instrument panel will display "Parking safety has been triggered, shifting into gear can release".

[0019] Furthermore, when the vehicle control unit (VCU) triggers a "parking safety" signal, and the instrument panel detects that the handbrake is not engaged, the body control unit (BCM) activates an audible and visual alarm. The audible and visual alarm must continue in the ON position and last for at least 3 minutes in the OFF position. When the door is opened under high voltage in the ON position, the audible and visual alarm must last for at least 5 minutes to remind the user that the vehicle is not powered off.

[0020] Furthermore, if the Body Control Controller (BCM) determines that the handbrake is not engaged when it is in the OFF position, the BCM will continuously sound the horn and flash the hazard lights. If the handbrake signal is lost, the BCM will stop the alarm.

[0021] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments without departing from the technical solution of the present invention and based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method for a parking safety assistance strategy for pure electric light trucks, characterized in that, This method is executed by the vehicle control unit (VCU), instrument cluster, and body control system (BCM) and includes the following steps: Step 1: Design the trigger conditions for entering the parking safety VCU_ParkingSafetySwitch=1; Step 2, Control Execution After the parking safety is triggered and the vehicle is in the OFF position, the Body Control Controller (BCM) will detect through the instrument panel that the handbrake is not engaged. The BCM will then activate the hazard lights and sound the horn to remind the driver to engage the handbrake. When the car door is opened, the mechanical handbrake is engaged, or the seatbelt is unfastened, the vehicle control unit (VCU) returns the gear to neutral (N) and sends a CAN signal to the instrument panel. Upon receiving the safety signal to trigger the parking system, the instrument panel issues a text message and a buzzer alarm indicating that the handbrake is not engaged. When the vehicle is powered on but not driven, and then powered off directly, the vehicle control unit (VCU) controls the gear to return to neutral and sends a CAN signal to the instrument panel. After receiving the safety signal to trigger the parking, if the instrument panel determines that the handbrake is not engaged, it will issue a text message and a buzzer alarm indicating that the handbrake is not engaged. When the vehicle is in driving mode, if the door is not closed or the seat belt is not fastened, the vehicle control unit (VCU) will prevent the vehicle from entering creep mode and will only respond to the throttle. When the mechanical handbrake is engaged, the vehicle control unit (VCU) will prevent the vehicle from responding to the throttle. Step 3: Parking safety deactivated.

2. The method for parking safety assistance strategy of pure electric light truck according to claim 1, characterized in that, In step one, a motion trigger flag S1 is designed inside the vehicle control unit (VCU): When the ignition switch is turned on, i.e., when IGOON is activated, S1=1; When the vehicle speed is ≥1km / h, the instantaneous movement action signal is triggered, or the ignition switch is turned off, that is, from IGON to IGOFF, then S1=2; When S1=2, the current vehicle speed is <1km / h, and the seat belt is unfastened, the door is opened, or the mechanical handbrake is engaged, S1=3.

3. The method for parking safety assistance strategy of pure electric light truck according to claim 2, characterized in that, The triggering of parking safety includes meeting the following three conditions simultaneously: (1)、S1=2； (2) Current vehicle speed <1km / h; (3) The seat belt is unfastened or the door is opened or the mechanical handbrake is engaged or the vehicle is currently in IGOFF mode.

4. The method for parking safety assistance strategy of pure electric light truck according to claim 1, characterized in that, The parking safety release condition is released after shifting into gear.

5. The method for parking safety assistance strategy of pure electric light truck according to claim 1, characterized in that, When the vehicle control unit (VCU) triggers a "parking safety" signal, the instrument panel detects that the handbrake is not engaged and sends a text message and a buzzer alarm. If the handbrake is in the OFF position, the body control unit (BCM) will activate an audible and visual alarm. The audible and visual alarm must be continuous in the ON position and last for at least 3 minutes in the OFF position. When the vehicle is in the ON position and the high voltage is applied, the door will be opened. The audible and visual alarm will last for no less than 5 minutes to remind the user that the vehicle is not powered off.

6. The method for parking safety assistance strategy of pure electric light truck according to claim 1, characterized in that, If the Body Control Controller (BCM) determines that the handbrake is not engaged when it is in the OFF position, the BCM will continuously sound the horn and flash the hazard lights. If the handbrake signal is lost, the BCM will stop the alarm.

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