Methods and systems for controlling the accelerator pedal of new energy vehicles

Abstract

This invention belongs to the field of new energy vehicle technology, specifically relating to a method and system for controlling the accelerator pedal of a new energy vehicle. The method includes: Step S1, when the HCU receives a refueling signal, it unlocks the accelerator pedal; Step S2, after unlocking the accelerator pedal, the HCU acquires a battery status signal and determines its subsequent active time based on the battery status; Step S3, if the accelerator pedal is not locked before the end of the active time, the HCU records the unlocked state and goes into sleep mode; Step S4, upon being woken up again, if the HCU detects the unlocked state and has not acquired a refueling signal, it locks the accelerator pedal. In busy refueling situations at gas stations, this invention only requires the HCU to consume the battery power for one active state and a small number of wake-ups.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicle technology, specifically relating to a method and system for controlling the accelerator pedal of a new energy vehicle. Background Technology

[0002] New energy vehicles also require batteries, or small batteries, to power the vehicle's low-voltage system. Currently, the locking and unlocking of the accelerator pedal (or fuel filler cap) in hybrid vehicles is achieved through an HCU control coil. The current accelerator pedal control strategy for new energy vehicles can handle the unlocking and locking of the accelerator pedal during normal refueling. Specifically, the driver parks the vehicle in the refueling position, puts the vehicle in the OFF state, and presses the accelerator button. The HCU unlocks the accelerator pedal via a coil. The HCU then remains active for a period of time to determine if refueling is complete. Specifically, it uses sensors to determine if the accelerator pedal has undergone a "first open, then close" process, meaning the gas station operator opened the unlocked accelerator pedal, refueled, and then closed it. After the designated time, the accelerator pedal is locked. Afterward, the part of the low-voltage system responsible for accelerator pedal control enters a dormant state, ceasing to consume the battery.

[0003] When gas stations are busy, drivers usually press the accelerator button immediately after parking to unlock the gas pump and then wait inside the car for the operator to come and refuel. If the operator is late, or if the operator goes to refuel other vehicles after plugging in the fuel nozzle, the HCU may not be able to maintain an active state for long enough to complete the refueling. The HCU will then need to execute the accelerator control strategy multiple times, significantly increasing the time it needs to maintain an active state and thus significantly increasing battery consumption. Summary of the Invention

[0004] The purpose of this invention is to provide a method and system for controlling the accelerator pedal of a new energy vehicle, in order to solve the technical problem that under the existing accelerator pedal control strategy of new energy vehicles, the HCU needs to execute the accelerator pedal control strategy multiple times when encountering a busy gas station, which increases the time of maintaining the active state and consumes the battery exponentially.

[0005] To address the aforementioned technical problems, this invention provides a method for controlling the accelerator pedal of a new energy vehicle, comprising: step S1, when the HCU receives a refueling signal, unlocking the accelerator pedal; step S2, after unlocking the accelerator pedal, the HCU acquires a battery status signal and determines its subsequent active time based on the battery status; step S3, if the accelerator pedal is not locked before the end of the active time, the HCU records the unlocked state and goes into sleep mode; step S4, after being woken up again, if the HCU detects the unlocked state and does not acquire a refueling signal, it locks the accelerator pedal.

[0006] Furthermore, in step S1, the method for unlocking the accelerator pedal when the HCU receives the refueling signal includes: step S11, when the HCU receives the refueling signal, it acquires the vehicle voltage status signal, and when the vehicle is in a low-pressure state, it sends a pressure relief signal to the engine; step S12, the HCU acquires the engine pressure signal, and when the engine pressure relief is completed, it unlocks the accelerator pedal.

[0007] Furthermore, in step S2, after unlocking the accelerator pedal, the HCU acquires the battery status signal and determines its subsequent active time based on the battery status, the method includes: step S21, after unlocking the accelerator pedal, the HCU acquires the battery voltage signal and the battery SOC signal; step S22, the HCU calculates its subsequent active time based on the battery voltage and the battery SOC.

[0008] Further, step S3, the method for the HCU to record the unlocked state and go into sleep if the accelerator pedal is not locked before the end of the active time, includes: step S31, when the active time is greater than or equal to a preset time, the HCU acquires the accelerator pedal open signal and the accelerator pedal close signal. If the HCU receives both the accelerator pedal open signal and the accelerator pedal close signal before the end of the active time, it locks the accelerator pedal and goes into sleep. If the HCU fails to receive both the accelerator pedal open signal and the accelerator pedal close signal before the end of the active time, it records the unlocked state and goes into sleep; step S32, when the active time is less than the preset time, the HCU acquires the accelerator pedal open signal and the accelerator pedal close signal. If the HCU does not receive the accelerator pedal close signal before the end of the active time, it records the unlocked state and goes into sleep.

[0009] Furthermore, in step S4, if the HCU detects an unlocked state and does not receive a refueling signal after being woken up again, the method for locking the accelerator pedal includes: step S41, when the vehicle enters the ON state, the HCU is woken up; step S42, if the HCU detects an unlocked state and does not receive a refueling signal, the accelerator pedal is locked.

[0010] On the other hand, the present invention also provides a accelerator control system for a new energy vehicle, comprising: an accelerator button adapted to send a refueling signal to an HCU; the HCU adapted to unlock the accelerator via a accelerator locking component upon receiving the refueling signal; the HCU adapted to acquire a battery status signal after unlocking the accelerator and determine its subsequent active time based on the battery status; if the accelerator is not locked before the end of the active time, the HCU is adapted to record the unlocked state and go into sleep mode; upon being woken up again, the HCU is adapted to lock the accelerator after detecting the unlocked state and without acquiring a refueling signal.

[0011] Furthermore, the HCU is adapted to acquire the vehicle voltage status signal when receiving a refueling signal, and to send a pressure relief signal to the engine when the vehicle is in a low-pressure state; the HCU is also adapted to acquire the engine pressure signal, and to unlock the accelerator pedal after the engine pressure relief is completed.

[0012] Furthermore, the HCU is adapted to acquire the battery voltage signal and the battery SOC signal after unlocking the accelerator pedal, and calculate its subsequent active time based on the battery voltage and the battery SOC.

[0013] Furthermore, when the active time is greater than or equal to the preset time, the HCU acquires the accelerator pedal open signal and the accelerator pedal close signal. If the HCU receives both the accelerator pedal open signal and the accelerator pedal close signal before the end of the active time, it locks the accelerator pedal and goes into sleep mode. If the HCU fails to receive both the accelerator pedal open signal and the accelerator pedal close signal before the end of the active time, it records the unlocked state and goes into sleep mode. When the active time is less than the preset time, the HCU acquires the accelerator pedal open signal and the accelerator pedal close signal. If the HCU does not receive the accelerator pedal close signal before the end of the active time, it records the unlocked state and goes into sleep mode.

[0014] Furthermore, the HCU is adapted to be woken up when the vehicle enters the ON state.

[0015] The beneficial effect of this invention is that the new energy vehicle accelerator pedal control method provided by this invention allows the HCU to acquire the battery status signal after receiving the driver's instruction to unlock the accelerator pedal. Based on the battery status, it determines its subsequent active time during refueling. When the gas station is busy, if the accelerator pedal does not open or close normally before the active time ends, and the HCU fails to lock the accelerator pedal, it indicates an abnormal situation such as the operator's delayed arrival or the operator plugging in the fuel nozzle and then refueling other vehicles. The HCU will record the unlocked state and go into sleep mode, skipping the accelerator pedal status recognition or control before the vehicle restarts. Upon being awakened again, if the unlocked state is detected, it will directly determine whether refueling is complete based on whether the driver has pressed the accelerator pedal button again. If not, it indicates that refueling is not yet complete, and it will record the unlocked state again and go into sleep mode, waiting for refueling. If completed, it indicates that refueling is complete, and the accelerator pedal will be locked. In busy refueling situations at gas stations, the HCU only needs to consume the battery's power for one active state and a few wake-ups. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a flowchart illustrating the accelerator control method for new energy vehicles according to the present invention;

[0018] Figure 2 This is a control block diagram of the new energy vehicle accelerator control system of the present invention; Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments implemented by those skilled in the art without creative effort are within the protection scope of the present invention.

[0020] Example: Figure 1 As shown, the present invention provides a method for controlling the accelerator pedal of a new energy vehicle, comprising: step S1, when the HCU receives a refueling signal, it unlocks the accelerator pedal; step S2, after unlocking the accelerator pedal, the HCU acquires a battery status signal and determines its subsequent active time based on the battery status; step S3, if the accelerator pedal is not locked before the end of the active time, the HCU records the unlocked state and goes into sleep mode; step S4, after being woken up again, if the HCU detects the unlocked state and does not acquire a refueling signal, it locks the accelerator pedal.

[0021] When gas stations are busy, drivers often press the accelerator button immediately after parking to unlock the gas pedal and wait for the operator to come and refuel. If the operator is late or goes to refuel other vehicles after plugging in the fuel nozzle, the HCU's active state may not be long enough to complete refueling. The HCU needs to execute the accelerator control strategy multiple times, significantly increasing the active state time and consuming the battery. The accelerator control method for new energy vehicles provided in this invention allows the HCU to acquire the battery status signal after receiving the driver's instruction to unlock the accelerator pedal, and determine whether it can continue refueling based on the battery status. During the active refueling period, due to the high volume of gas station activity, if the accelerator pedal does not open or close properly before the end of the active period, and the HCU fails to lock the pedal, it indicates an abnormal situation such as the operator's delayed arrival or the operator plugging in the fuel nozzle and then going to refuel other vehicles. The HCU will record the unlocked state and go into sleep mode, skipping the identification or control of the accelerator pedal status before the vehicle restarts. Upon being woken up again, if an unlocked state is detected, it will directly determine whether refueling is complete based on whether the driver has pressed the accelerator button again. If not, it indicates that refueling is not yet complete, and it will record the unlocked state again and go into sleep mode, waiting for refueling. If refueling is complete, it indicates that refueling is finished and the accelerator pedal will be locked. During busy refueling periods at gas stations, the HCU only needs to consume the battery's power for one active state and a small number of wake-ups.

[0022] Step S1, the method for unlocking the accelerator pedal when the HCU receives the refueling signal, includes: Step S11, when the HCU receives the refueling signal, it acquires the vehicle voltage status signal; when the vehicle is in a low-pressure state, it sends a pressure relief signal to the engine; Step S12, the HCU acquires the engine pressure signal; when the engine pressure relief is complete, it unlocks the accelerator pedal. Ensuring the vehicle is in a low-pressure state and ensuring the engine pressure relief is complete are aimed at ensuring refueling safety.

[0023] In at least one embodiment, step S2, after unlocking the accelerator pedal, involves the HCU acquiring a battery status signal and determining its subsequent active time based on the battery status. This method includes: step S21, after unlocking the accelerator pedal, the HCU acquires a battery voltage signal and a battery SOC signal; step S22, the HCU calculates its subsequent active time based on the battery voltage and battery SOC. Determining the HCU's subsequent active time using battery voltage and battery SOC ensures that the battery has sufficient charge to start the vehicle, thereby waking up the dormant HCU. If the battery can provide a lifespan signal, the battery lifespan can also be correlated when calculating the subsequent active time.

[0024] In at least one embodiment, step S3, where the HCU records an unlocked state and goes into sleep mode if the accelerator pedal is not locked before the end of the active time, includes the following steps: Step S31, when the active time is greater than or equal to a preset time, the HCU acquires the accelerator pedal open signal and the accelerator pedal close signal. If the HCU receives both the accelerator pedal open signal and the accelerator pedal close signal before the end of the active time, it locks the accelerator pedal and goes into sleep mode. If the HCU fails to receive both the accelerator pedal open signal and the accelerator pedal close signal before the end of the active time, it records an unlocked state and goes into sleep mode; Step S32, when the active time is less than the preset time, the HCU acquires the accelerator pedal open signal and the accelerator pedal close signal. If the HCU does not receive the accelerator pedal close signal before the end of the active time, it records an unlocked state and goes into sleep mode. The preset time is the time required for the operator to immediately open the accelerator pedal, insert the fuel nozzle, and then immediately close the accelerator pedal after the vehicle has stopped.

[0025] Even if the gas station is busy, there's still a possibility that the operator might need to refuel the vehicle immediately. Therefore, after determining its subsequent active time based on the battery status, the HCU will determine whether the refueling is normal if the active time is sufficient for a normal refueling operation. This is done by the HCU receiving both the accelerator pedal open and close signals before the active time ends. If it's normal refueling, the accelerator pedal will lock and the system will go into sleep mode. Once refueling is complete, the accelerator pedal will also lock. If the HCU fails to receive both the accelerator pedal open and close signals before the active time ends, it indicates an abnormal situation such as the gas station being busy, the operator being late, or the operator plugging in the fuel nozzle and then refueling other vehicles. In this case, the unlocked state will be recorded and the system will go into sleep mode. The vehicle will not consume the battery again until it is restarted at the refueling location.

[0026] If the HCU determines, based on the battery status, that its subsequent active time is insufficient to complete a normal refueling, and there is no situation where only a small amount of fuel is added, and the HCU receives the refueling valve closing signal in advance and locks the refueling valve, then the HCU will not receive the refueling valve closing signal before the end of its active time. It will then record the unlocked state and go into hibernation, stopping the consumption of the battery.

[0027] In at least one embodiment, in step S4, after being woken up again, if the HCU detects an unlocked state and does not receive a refueling signal, the method for locking the accelerator pedal includes: step S41, when the vehicle enters the ON state, the HCU is woken up; step S42, if the HCU detects an unlocked state and does not receive a refueling signal, the accelerator pedal is locked. When the vehicle is restarted at the refueling position, the vehicle enters the ON state, the HCU is woken up, and the completion of refueling can be determined by whether the driver presses the accelerator pedal button again. Under normal circumstances, the driver will not press the accelerator pedal button again after refueling is completed, indicating that refueling is completed during the HCU's dormant period, and the accelerator pedal is locked.

[0028] like Figure 2 As shown, in at least one embodiment, a new energy vehicle accelerator control system is also provided, including: an accelerator button, which is adapted to send a refueling signal to an HCU; the HCU is adapted to unlock the accelerator via a accelerator locking component when it receives the refueling signal; the HCU is adapted to acquire a battery status signal after unlocking the accelerator and determine its subsequent active time based on the battery status; if the accelerator is not locked before the end of the active time, the HCU is adapted to record the unlocked state and go into sleep mode; after being woken up again, the HCU is adapted to lock the accelerator after detecting the unlocked state and without acquiring a refueling signal.

[0029] The HCU is adapted to acquire the vehicle voltage status signal when it receives a refueling signal, and to send a pressure relief signal to the engine when the vehicle is in a low-pressure state; the HCU is also adapted to acquire the engine pressure signal, and to unlock the accelerator pedal after the engine pressure relief is completed.

[0030] The HCU is adapted to acquire the battery voltage signal and the battery SOC signal after unlocking the accelerator pedal, and calculate its subsequent active time based on the battery voltage and battery SOC.

[0031] When the active time is greater than or equal to the preset time, the HCU acquires the accelerator pedal open signal and the accelerator pedal close signal. If the HCU receives both the accelerator pedal open signal and the accelerator pedal close signal before the active time ends, it locks the accelerator pedal and goes into sleep mode. If the HCU fails to receive both the accelerator pedal open signal and the accelerator pedal close signal before the active time ends, it records the unlocked state and goes into sleep mode. When the active time is less than the preset time, the HCU acquires the accelerator pedal open signal and the accelerator pedal close signal. If the HCU does not receive the accelerator pedal close signal before the active time ends, it records the unlocked state and goes into sleep mode.

[0032] The HCU is adapted to be woken up when the vehicle enters the ON state.

[0033] The working principle and technical effects of this new energy vehicle accelerator control system have been explained above and will not be repeated here.

[0034] In summary, the new energy vehicle accelerator pedal control method provided by this invention allows the HCU to acquire the battery status signal after receiving the driver's instruction to unlock the accelerator pedal. Based on the battery status, the HCU determines its subsequent active time during refueling. When the gas station is busy, if the accelerator pedal does not open or close normally before the active time ends, and the HCU fails to lock the accelerator pedal, it indicates an abnormal situation such as the operator's delayed arrival or the operator plugging in the fuel nozzle and then refueling other vehicles. In this case, the HCU records the unlocked state and goes into sleep mode, skipping the accelerator pedal status recognition or control before the vehicle restarts. Upon being awakened again, if the unlocked state is detected, the HCU directly determines whether refueling is complete based on whether the driver has pressed the accelerator pedal button again. If not, it indicates that refueling is not yet complete, and the HCU records the unlocked state again and goes into sleep mode, waiting for refueling. If refueling is complete, it indicates that refueling is finished, and the accelerator pedal is locked. During busy refueling situations at gas stations, the HCU only needs to consume the battery's power for one active state and a few wake-ups.

[0035] In the embodiments provided in this application, it should be understood that the disclosed systems and devices can be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of the mechanism is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0036] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A method for controlling the accelerator pedal of a new energy vehicle, characterized in that, include: Step S1: When the HCU receives the refueling signal, it unlocks the accelerator pedal. Step S2: After unlocking the accelerator pedal, the HCU obtains the battery status signal and determines its subsequent active time based on the battery status. Step S3: If the accelerator pedal is not locked before the end of the active time, the HCU records the unlocked state and goes into sleep mode. Step S4: After being woken up again, if the HCU detects that the accelerator pedal is not locked and no refueling signal is received, the accelerator pedal will be locked. If the accelerator pedal is not locked before the end of the active time in step S3, the method by which the HCU records the unlocked state and goes into sleep mode includes: Step S31: When the active time is greater than or equal to the preset time, the HCU acquires the accelerator open signal and the accelerator close signal. If the HCU receives the accelerator open signal and the accelerator close signal before the end of the active time, it locks the accelerator and goes into sleep mode. If the HCU fails to receive both the accelerator open signal and the accelerator close signal before the end of the active time, it records the unlocked state and goes into sleep mode. Step S32: When the active time is less than the preset time, the HCU acquires the accelerator pedal open signal and the accelerator pedal close signal. If the HCU does not receive the accelerator pedal close signal before the active time ends, it records the unlocked state and goes into sleep mode. In step S4, if the HCU detects an unlocked state and does not receive a refueling signal after being woken up again, the method for locking the accelerator pedal includes: Step S41: When the vehicle enters the ON state, the HCU is awakened; In step S42, if the HCU detects an unlocked state and does not receive a refueling signal, it locks the refueling valve.

2. The method for controlling the accelerator pedal of a new energy vehicle according to claim 1, characterized in that, In step S1, when the HCU receives a refueling signal, the method for unlocking the accelerator pedal includes: In step S11, when the HCU receives the refueling signal, it acquires the vehicle voltage status signal. When the vehicle is in a low-pressure state, it sends a pressure relief signal to the engine. In step S12, the HCU acquires the engine pressure signal and unlocks the accelerator pedal after the engine pressure is released.

3. The method for controlling the accelerator pedal of a new energy vehicle according to claim 2, characterized in that, In step S2, after unlocking the accelerator pedal, the HCU obtains the battery status signal and determines its subsequent active time based on the battery status, including the following methods: Step S21: After unlocking the accelerator pedal, the HCU acquires the battery voltage signal and the battery SOC signal. In step S22, the HCU calculates its subsequent active time based on the battery voltage and battery SOC.

4. A throttle control system for a new energy vehicle, characterized in that, include: Accelerator button, which is adapted to send an acceleration signal to the HCU; The HCU is adapted to unlock the accelerator pedal via the accelerator pedal locking component when it receives the refueling signal; The HCU is adapted to obtain the battery status signal after unlocking the accelerator pedal and determine its subsequent active time based on the battery status. If the accelerator pedal is not locked before the end of the active period, the HCU is suitable for recording the unlocked state and going into sleep mode; Upon being reawakened, the HCU is adapted to lock the accelerator pedal if it detects an unlocked state and has not received a refueling signal.

5. The new energy vehicle accelerator control system according to claim 4, characterized in that, The HCU is adapted to acquire the vehicle voltage status signal when it receives a refueling signal, and send a pressure relief signal to the engine when the vehicle is in a low-pressure state. The HCU is adapted to acquire engine pressure signals and unlock the accelerator pedal after the engine pressure is released.

6. The new energy vehicle accelerator control system according to claim 5, characterized in that, The HCU is adapted to acquire the battery voltage signal and the battery SOC signal after unlocking the accelerator pedal, and calculate its subsequent active time based on the battery voltage and battery SOC.

7. The new energy vehicle accelerator control system according to claim 6, characterized in that, When the active time is greater than or equal to the preset time, the HCU acquires the accelerator open signal and the accelerator close signal. If the HCU receives both the accelerator open signal and the accelerator close signal before the active time ends, it locks the accelerator and goes into sleep mode. If the HCU fails to receive both the accelerator open signal and the accelerator close signal before the active time ends, it records the unlocked state and goes into sleep mode. When the active time is less than the preset time, the HCU acquires the accelerator open signal and the accelerator close signal. If the HCU does not receive the accelerator close signal before the active time ends, it records the unlocked state and goes into sleep mode.

8. The new energy vehicle accelerator control system according to claim 7, characterized in that, The HCU is adapted to be woken up when the vehicle enters the ON state.

Images