New energy automobile and auxiliary braking method thereof

Abstract

The invention discloses an auxiliary braking method of a new energy vehicle, and relates to the field of new energy vehicle control. The method comprises the steps that when it is monitored that an auxiliary braking judgment condition and an auxiliary braking starting condition are met at the same time, a hill-holding or crawling function is quitted; if the parking braking system exists in the current automobile, after parking is conducted through the parking braking system, the gear is switched to the neutral gear; and if the parking braking system does not exist in the current automobile, the gear is switched to the neutral gear. According to the method, the auxiliary braking judgment condition is reasonably defined according to the specific running condition of the automobile, and under the condition, if the driver leaves the cab, auxiliary braking is carried out, so that the situation that the automobile automatically moves abnormally under the auxiliary braking judgment condition is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy vehicle control, and particularly relates to an auxiliary braking method for a new energy vehicle. BACKGROUND

[0002] The current auxiliary driving function of the new energy vehicle includes the inching and hill hold (anti-slip) functions: The inching mode is also known as the low-speed cruise driving assistance system. After being enabled, the inching mode can let the vehicle control the output of the engine, the transmission system and the brake system by itself, and the driver does not need to operate the accelerator and the brake. The vehicle will release the torque according to the feedback of the road conditions, and distribute the braking force of the four wheels through the electronic system, so as to prevent the wheels from slipping and ensure the stable passing performance of the vehicle on special road conditions.

[0003] The hill hold (anti-slip) function aims to prevent the vehicle from slipping on the slope and ensure the stability of the vehicle on the slope. This function is mainly realized through an electronic control system, and specifically includes: The uphill assist system: when the vehicle is parked on an uphill road section, the uphill assist system will automatically maintain the braking effect to prevent the vehicle from slipping backward. It usually lasts for a few seconds, giving the driver enough time to switch to the accelerator pedal to avoid slipping.

[0004] The automatic parking function: automatically applies brake force when the vehicle is stopped to prevent the vehicle from sliding. When the driver steps on the accelerator or pulls up the hand brake, the system will automatically release the brake, which is suitable for scenes where the vehicle is frequently parked and reduces driving fatigue.

[0005] The anti-slip function: in a new energy vehicle, the anti-slip function is realized through motor torque control. When the vehicle is in the D or R gear and the vehicle speed is small, and the motor torque is not enough to overcome the gravitational component, the system will activate the anti-slip function to keep the vehicle stable on the slope.

[0006] The inching and hill hold (anti-slip) functions improve the safety performance of the new energy vehicle, but some problems have not been solved for some special situations, for example, for a new energy vehicle on a gentle slope, not powered off, and the gear is in the drive gear, and the hand brake is not pulled. At this time, after the vehicle enters the hill hold (anti-slip) function for a period of time, the vehicle will automatically move abnormally due to the strategy of the vehicle control system exiting the hill hold (anti-slip) function and switching to the inching function. SUMMARY

[0007] In view of the defects in the prior art, the technical problem solved by the present application is: how to assist the braking of the vehicle when the new energy vehicle on the gentle slope is not powered off, the gear is in the drive gear, and the hand brake is not pulled.

[0008] To achieve the above objectives, in a first aspect, embodiments of this application provide an auxiliary braking method for a new energy vehicle, the method comprising the following steps: Definition: The auxiliary braking conditions are as follows: the vehicle speed is less than the low vehicle speed threshold, the accelerator pedal opening and the brake pedal opening are both less than the no-opening threshold, the gear is in drive gear, and the parking brake is not activated. Definition: Detecting the driver leaving the driver's cab is a condition for assisted braking to be activated; When the auxiliary braking judgment condition and the auxiliary braking activation condition are simultaneously detected, the hill-start assist or creep function is discontinued; if the current vehicle has a parking brake system, the vehicle is parked through the parking brake system and then the gear is shifted to neutral; if the current vehicle does not have a parking brake system, the gear is shifted to neutral.

[0009] In conjunction with the first aspect, in one implementation, the detection conditions for the driver leaving the driver's cab include: The driver's side seatbelt was switched from fastened to unfastened. The driver leaves the driver's side seat; The duration of being unfastened and leaving the driver's side seat both exceeded the detection threshold; The car door switched from the closed state to the open state.

[0010] In conjunction with the first aspect, in one embodiment, the monitoring threshold is 3~5s, the low vehicle speed threshold is 1.8~2.5km / h, and the no-opening threshold is 0~0.5.

[0011] In conjunction with the first aspect, in one implementation, the process of detecting that both the auxiliary braking determination condition and the auxiliary braking activation condition are met simultaneously includes: after detecting that the auxiliary braking determination condition is met, determining whether the auxiliary braking condition is met.

[0012] In conjunction with the first aspect, in one embodiment, when the shifting mechanism is an electronic shifter, the process after shifting the gear to neutral further includes: sending the actual gear status and a reminder that the vehicle has entered an auxiliary safety state to the instrument panel for display. When the gear shifting mechanism is mechanical, the process after shifting the gear to neutral also includes: sending the actual gear position status to the instrument and displaying it, and at the same time sending a reminder to the driver that the gear lever should be in neutral and that the vehicle has entered an auxiliary safety state to the instrument and displaying it.

[0013] In conjunction with the first aspect, in one implementation, when the current vehicle does not have a parking brake system, the method further includes the following steps: issuing an alarm, the alarm type being an audible alarm, a visual alarm, or an audible and visual alarm.

[0014] Secondly, embodiments of this application provide a new energy vehicle for the aforementioned auxiliary braking method, the vehicle comprising a vehicle controller, a body control module, a sensor module, and a gear shift mechanism control module; characterized in that: The sensor module is used to: collect sensing signals and transmit them to the body control module. The sensing signals include accelerator pedal opening sensing signals, brake pedal opening sensing signals, door sensing signals, seat belt sensing signals, and driver's side seat sensing signals. The body control module is used to: send sensor signals to the vehicle controller; The gear shift mechanism control module is used to: control the gear shift mechanism; and send gear position information to the vehicle controller. The vehicle controller is used for: Based on the gear position information transmitted by the gear shift mechanism control module and the sensor signal corresponding to the auxiliary braking determination condition, monitor whether the auxiliary braking determination condition is met. When the auxiliary braking determination condition is met, the auxiliary braking activation condition is monitored based on the sensor signal corresponding to the auxiliary braking activation condition. When the conditions for assisted braking to be activated are met, the hill-start assist or creep function is disengaged, and the shift mechanism control module switches the gear to neutral.

[0015] In conjunction with the second aspect, in one embodiment the sensor module includes: Door sensors used to collect door sensing signals; A seatbelt sensor used to collect seatbelt sensing signals; Seat sensors used to collect seat sensing signals; Accelerator pedal opening sensor used to collect accelerator pedal opening signal; Brake pedal opening sensor used to collect brake pedal opening signal.

[0016] In conjunction with the second aspect, in one embodiment, the vehicle also includes a parking brake system, and the vehicle controller, when detecting that the auxiliary braking determination conditions are met, is further used to: control the parking brake system to park.

[0017] In conjunction with the second aspect, in one embodiment, the vehicle also includes a motor controller and an alarm module; The vehicle controller is also used for: When the auxiliary braking determination condition is detected, the motor controller requests the powertrain to be enabled. When the system detects that the auxiliary braking conditions are met and parking is not possible, the control alarm module will issue an alarm.

[0018] Compared with the prior art, the advantages of the present invention are as follows: This application reasonably defines the auxiliary braking judgment conditions (vehicle speed, pedal opening, gear position, parking) based on the specific operating conditions of the vehicle. Under these conditions, if the driver leaves the driver's seat, auxiliary braking will be applied (active braking will be applied if active braking is possible, and the gear will be switched to neutral if active braking is not possible). This avoids the vehicle from automatically making "abnormal" movements under the auxiliary braking judgment conditions. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the auxiliary braking structure of a new energy vehicle in an embodiment of this application; Figure 2 This is a flowchart illustrating the auxiliary braking method for new energy vehicles in the embodiments of this application; Figure 3 This is a schematic diagram of the hardware structure of the auxiliary braking device for new energy vehicles involved in the embodiments of this application. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0024] In a first aspect, embodiments of this application provide an auxiliary braking method for a new energy vehicle, the method comprising the following steps: Definition: The auxiliary braking determination conditions are as follows: the vehicle is in the Ready state ("Ready" means "the vehicle is fully prepared, has been successfully started, and can be dispatched at any time"), the vehicle speed is less than the low vehicle speed threshold (the low vehicle speed threshold is generally 1.8~2.5km / h, and 2.0km / h in this embodiment), the accelerator pedal opening and brake pedal opening are both less than the no-opening threshold (0~0.5, 0 in this embodiment), the gear is in drive gear, and the parking brake is not activated.

[0025] Definition: The auxiliary braking is activated when the driver is detected leaving the driver's cab.

[0026] When the auxiliary braking judgment condition and the auxiliary braking activation condition are simultaneously detected, the hill-start assist or creep function is discontinued; if the vehicle has a parking brake system, the vehicle is parked using the parking brake system and then the gear is switched to neutral; if the vehicle does not have a parking brake system, the gear is switched to neutral.

[0027] Therefore, this application reasonably defines the auxiliary braking judgment conditions (vehicle speed, pedal opening, gear, parking) based on the specific operating conditions of the vehicle. Under these conditions, if the driver leaves the driver's seat, auxiliary braking will be performed (active braking if possible, and shifting to neutral if active braking is not possible). This avoids the vehicle from automatically making "abnormal" movements under the auxiliary braking judgment conditions.

[0028] In one embodiment, the detection conditions for the driver leaving the driver's cab include: (1) The driver's side seat belt is switched from fastened to unfastened; (2) The driver leaves the driver's side seat; (3) The duration of being unfastened and leaving the driver's side seat both exceed the detection threshold; (4) The car door changes from closed to open.

[0029] Furthermore, each of the above detection conditions is detected by the corresponding sensor, and the monitoring threshold is 3~5s, generally 3s.

[0030] In one embodiment, the process of detecting that the auxiliary braking determination condition and the auxiliary braking initiation condition are met simultaneously includes: after detecting that the auxiliary braking determination condition is met, determining whether the auxiliary braking condition is met; the reason for monitoring the auxiliary braking determination condition first and then determining whether the auxiliary braking condition is met is that if the auxiliary braking determination condition is not met, then auxiliary braking is not required, that is, the auxiliary braking condition does not need to be considered.

[0031] In one embodiment, the shifting mechanism is an electronic shifter. In this case, the process after the control gear is switched to neutral further includes: sending the actual gear status and a reminder that the vehicle has entered an auxiliary safety state to the instrument panel for display.

[0032] In one embodiment, the shifting mechanism is a mechanical shifting mechanism. In this case, the process after the control gear is switched to neutral further includes: sending the actual gear status to the instrument and displaying it, and at the same time sending a reminder to the driver that the gear lever should be in neutral and that the vehicle has entered an auxiliary safety state to the instrument and displaying it.

[0033] In one embodiment, when the current vehicle does not have a parking brake system, even if the vehicle cannot be parked when it is put into neutral, the above method further includes the following steps: issuing an alarm, the alarm type of which can be an audible alarm (e.g., handbrake not engaged), a visual alarm, or an audible and visual alarm, to alert the driver.

[0034] Secondly, embodiments of this application also provide a new energy vehicle for the above-described auxiliary braking method, see [link to relevant documentation]. Figure 1 As shown, the vehicle includes a vehicle control unit (VCU), a body control module (BCM), a sensor module, a gear shift mechanism (electronic or mechanical), a gear shift mechanism control module, electronic instruments, etc.

[0035] The sensor module is used to collect sensing signals and transmit them to the body control module. The sensing signals include accelerator pedal opening sensing signals, brake pedal opening sensing signals, door sensing signals, seat belt sensing signals, and driver's side seat sensing signals.

[0036] The body control module is used to send sensor signals to the vehicle controller.

[0037] The gear shift mechanism control module is used to control the gear shift mechanism and send gear information to the vehicle controller.

[0038] The vehicle controller is used for: Based on the gear position information transmitted by the gear shift mechanism control module and the sensor signals corresponding to the auxiliary braking determination conditions, monitor whether the above auxiliary braking determination conditions are met. When the auxiliary braking determination condition is met, the auxiliary braking activation condition is monitored based on the sensor signal corresponding to the above auxiliary braking activation condition. When the conditions for assisted braking to be activated are met, the hill-start assist or creep function is disengaged, and the shift mechanism control module switches the gear to neutral.

[0039] In one embodiment, the sensor module includes: Door sensors used to collect door sensing signals; A seatbelt sensor used to collect seatbelt sensing signals; Seat sensors used to collect seat sensing signals; Accelerator pedal opening sensor used to collect accelerator pedal opening signal; Brake pedal opening sensor used to collect brake pedal opening signal.

[0040] See Figure 1 As shown, in one embodiment, the new energy vehicle also includes a parking brake system (EPB - Electrical Park Brake) for parking. When the vehicle controller detects that the auxiliary braking determination conditions are met, it is also used to control the parking brake system to park.

[0041] See Figure 1 As shown, in one embodiment, the new energy vehicle further includes a motor controller (MCU - Motor Control Unit). When the vehicle controller detects that the auxiliary braking determination condition is met, it is also used to: control the motor controller to request the powertrain to be enabled.

[0042] In one embodiment, the new energy vehicle further includes an alarm module. When the vehicle controller detects that the auxiliary braking determination conditions are met and parking is not possible, it is also used to: control the alarm module to issue an alarm.

[0043] See below. Figure 1 and Figure 2 As shown, a specific embodiment illustrates how the above-mentioned auxiliary braking method for new energy vehicles is specifically implemented.

[0044] S1: The VCU determines whether the auxiliary braking conditions are met, specifically: the vehicle is in Ready state, the vehicle speed is less than 2.0 km / h, the accelerator pedal opening and the brake pedal opening are both 0, the gear is in drive, and the parking brake is not activated; if yes, proceed to S2, otherwise repeat S1.

[0045] The S1 process specifically includes: The VCU determines whether the auxiliary braking conditions are met based on the vehicle status (whether it is Ready), vehicle speed information, accelerator pedal opening sensor signal (the accelerator pedal opening sensor is transmitted through the body control module), brake pedal opening sensor signal (the brake pedal opening sensor is transmitted through the body control module), gear information (transmitted through the shift mechanism control module), and parking information.

[0046] S2: The VCU determines whether the auxiliary braking start conditions are met. If yes, proceed to S3; otherwise, proceed to S1.

[0047] The specific conditions for S2 to activate auxiliary braking are as follows: The driver's side seatbelt was switched from fastened to unfastened. The driver leaves the driver's side seat; The duration of being unfastened and leaving the driver's side seat both exceeded 3 seconds; The car door switched from the closed state to the open state.

[0048] The S2 process specifically includes: the VCU determines whether the auxiliary braking activation conditions are met based on the door sensor signal (transmitted by the door sensor through the body control module), the seat belt sensor signal (transmitted by the seat belt sensor through the body control module), and the seat sensor signal (transmitted by the seat sensor through the body control module).

[0049] S3: VCU exits the slope or creep function.

[0050] S4: The VCU controls the EPB to automatically park and sends a command to the MCU to request powertrain enable; if there is no EPB, an audible and visual alarm is triggered.

[0051] S5: The VCU requests the gear shift control module to shift the gear to neutral. If the gear shift mechanism is electronic, the VCU sends the actual gear status and a reminder that the vehicle has entered the auxiliary safety state to the instrument panel. If the gear shift mechanism is mechanical, the VCU sends the actual gear status to the instrument panel, and at the same time sends a reminder to the driver that the gear lever should be in neutral and that the vehicle has entered the auxiliary safety state to the instrument panel.

[0052] Thirdly, embodiments of this application provide an auxiliary braking device for a new energy vehicle. The auxiliary braking device for a new energy vehicle can be a device with data processing capabilities, such as a personal computer (PC), a laptop computer, or a server.

[0053] Reference Figure 3 , Figure 3 This is a schematic diagram of the hardware structure of the auxiliary braking device for a new energy vehicle involved in the embodiments of this application. In the embodiments of this application, the auxiliary braking device for a new energy vehicle may include a processor, a memory, a communication interface, and a communication bus.

[0054] The communication bus can be of any type and is used to interconnect the processor, memory, and communication interface.

[0055] Communication interfaces include input / output (I / O) interfaces, physical interfaces, and logical interfaces used for interconnecting components within the auxiliary braking system of new energy vehicles, as well as interfaces used for interconnecting the auxiliary braking system of new energy vehicles with other devices (such as other computing devices or user equipment). Physical interfaces can be Ethernet interfaces, fiber optic interfaces, ATM interfaces, etc.; user equipment can be displays, keyboards, etc.

[0056] Memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0057] The processor can be a general-purpose processor, which can call the auxiliary braking program for new energy vehicles stored in the memory and execute the auxiliary braking method for new energy vehicles provided in the embodiments of this application. For example, the general-purpose processor can be a central processing unit (CPU). The method executed when the auxiliary braking program for new energy vehicles is called can be referred to the various embodiments of the auxiliary braking method for new energy vehicles in this application, and will not be repeated here.

[0058] Those skilled in the art will understand that Figure 3 The hardware structure shown does not constitute a limitation of this application and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0059] Fourthly, embodiments of this application also provide a computer-readable storage medium.

[0060] The computer-readable storage medium of this application stores an auxiliary braking program for a new energy vehicle. When the auxiliary braking program for the new energy vehicle is executed by a processor, it implements the steps of the auxiliary braking method for the new energy vehicle as described above, specifically: Definition: The auxiliary braking determination conditions are as follows: the vehicle is in the Ready state ("Ready" means "the vehicle is fully prepared, has been successfully started, and can be dispatched at any time"), the vehicle speed is less than the low vehicle speed threshold (the low vehicle speed threshold is generally 1.8~2.5km / h, and 2.0km / h in this embodiment), the accelerator pedal opening and brake pedal opening are both less than the no-opening threshold (0~0.5, 0 in this embodiment), the gear is in drive gear, and the parking brake is not activated.

[0061] Definition: The auxiliary braking is activated when the driver is detected leaving the driver's cab.

[0062] When the auxiliary braking judgment condition and the auxiliary braking activation condition are simultaneously detected, the hill-start assist or creep function is discontinued; if the vehicle has a parking brake system, the vehicle is parked using the parking brake system and then the gear is switched to neutral; if the vehicle does not have a parking brake system, the gear is switched to neutral.

[0063] The aforementioned detection conditions for the driver leaving the driver's cab also include: (1) The driver's side seat belt is switched from fastened to unfastened; (2) The driver leaves the driver's side seat; (3) The duration of being unfastened and leaving the driver's side seat both exceed the detection threshold; (4) The car door changes from closed to open.

[0064] Each of the above detection conditions is detected by the corresponding sensor, and the monitoring threshold is 3~5s, generally 3s.

[0065] The process described above for detecting that both the auxiliary braking determination condition and the auxiliary braking initiation condition are met simultaneously includes: after detecting that the auxiliary braking determination condition is met, determining whether the auxiliary braking condition is met; the reason for monitoring the auxiliary braking determination condition first and then determining whether the auxiliary braking condition is met is that if the auxiliary braking determination condition is not met, then auxiliary braking is not required, that is, the auxiliary braking condition does not need to be considered.

[0066] The shifting mechanism is electronic. In this case, the process after the above-mentioned control gear is switched to neutral also includes: sending the actual gear status and the reminder that the vehicle has entered the auxiliary safety state to the instrument panel for display.

[0067] The shifting mechanism is a mechanical shifting mechanism. In this case, the process after the above-mentioned control gear is switched to neutral also includes: sending the actual gear status to the instrument and displaying it, and at the same time sending a reminder to the driver that the gear lever should be in neutral and that the vehicle has entered the auxiliary safety state to the instrument and displaying it.

[0068] When the current car does not have a parking brake system, it is impossible to park even if it is put into neutral. Therefore, the above method also includes the following process: issuing a warning. The warning type can be an audible warning (such as the handbrake not being engaged), a visual warning, or an audible and visual warning to alert the driver.

[0069] The method implemented when the auxiliary braking procedure of the new energy vehicle is executed can be referred to in the various embodiments of the auxiliary braking method of the new energy vehicle of this application, and will not be repeated here.

[0070] It should be noted that the sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0071] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0072] The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus. The terms "first," "second," and "third," etc., are used to distinguish different objects, etc., and do not indicate a sequence, nor do they limit "first," "second," and "third" to different types.

[0073] In the description of the embodiments of this application, terms such as "exemplary," "for example," or "for instance" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplary," "for example," or "for instance" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary," "for example," or "for instance" is intended to present the relevant concepts in a concrete manner.

[0074] In the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0075] In some processes described in the embodiments of this application, multiple operations or steps are included in a specific order. However, it should be understood that these operations or steps may not be executed in the order they appear in the embodiments of this application, or they may be executed in parallel. The sequence number of the operation is only used to distinguish different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed sequentially or in parallel, and these operations or steps may be combined.

[0076] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device to execute the methods described in the various embodiments of this application.

[0077] The above are merely specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.

Claims

1. An auxiliary braking method for a new energy vehicle, characterized in that, The method includes the following steps: Definition: The auxiliary braking conditions are as follows: the vehicle speed is less than the low vehicle speed threshold, the accelerator pedal opening and the brake pedal opening are both less than the no-opening threshold, the gear is in drive gear, and the parking brake is not activated. Definition: Detecting the driver leaving the driver's cab is a condition for assisted braking to be activated; When the auxiliary braking judgment condition and the auxiliary braking activation condition are simultaneously detected, the hill-start assist or creep function is discontinued; if the current vehicle has a parking brake system, the vehicle is parked through the parking brake system and then the gear is shifted to neutral; if the current vehicle does not have a parking brake system, the gear is shifted to neutral.

2. The auxiliary braking method for new energy vehicles as described in claim 1, characterized in that, The detection conditions for the driver leaving the driver's cab include: The driver's side seatbelt was switched from fastened to unfastened. The driver leaves the driver's side seat; The duration of being unfastened and leaving the driver's side seat both exceeded the detection threshold; The car door switched from the closed state to the open state.

3. The auxiliary braking method for new energy vehicles as described in claim 2, characterized in that, The monitoring threshold is 3~5s, the low vehicle speed threshold is 1.8~2.5km / h, and the no-opening threshold is 0~0.

5.

4. The auxiliary braking method for new energy vehicles as described in claim 1, characterized in that, The process of detecting that both the auxiliary braking determination condition and the auxiliary braking activation condition are met simultaneously includes: after detecting that the auxiliary braking determination condition is met, determining whether the auxiliary braking condition is met.

5. The auxiliary braking method for new energy vehicles as described in any one of claims 1 to 4, characterized in that, When the shifting mechanism is electronic shifting, the process after shifting the gear to neutral also includes: sending the actual gear status and a reminder that the vehicle has entered an auxiliary safety state to the instrument panel for display; When the gear shifting mechanism is mechanical, the process after shifting the gear to neutral also includes: sending the actual gear position status to the instrument and displaying it, and at the same time sending a reminder to the driver that the gear lever should be in neutral and that the vehicle has entered an auxiliary safety state to the instrument and displaying it.

6. The auxiliary braking method for new energy vehicles as described in any one of claims 1 to 4, characterized in that, When the current vehicle does not have a parking brake system, the method also includes the following process: issuing an alarm, the alarm type being an audible alarm, a visual alarm, or an audible and visual alarm.

7. A new energy vehicle for use in the auxiliary braking method according to any one of claims 1 to 6, the vehicle comprising a vehicle controller, a body control module, a sensor module, and a gear shift mechanism control module; characterized in that: The sensor module is used to: collect sensing signals and transmit them to the body control module. The sensing signals include accelerator pedal opening sensing signals, brake pedal opening sensing signals, door sensing signals, seat belt sensing signals, and driver's side seat sensing signals. The body control module is used to: send sensor signals to the vehicle controller; The gear shift mechanism control module is used to: control the gear shift mechanism; and send gear position information to the vehicle controller. The vehicle controller is used for: Based on the gear position information transmitted by the gear shift mechanism control module and the sensor signal corresponding to the auxiliary braking determination condition, monitor whether the auxiliary braking determination condition is met. When the auxiliary braking determination condition is met, the auxiliary braking activation condition is monitored based on the sensor signal corresponding to the auxiliary braking activation condition. When the conditions for assisted braking to be activated are met, the hill-start assist or creep function is disengaged, and the shift mechanism control module switches the gear to neutral.

8. The new energy vehicle as described in claim 7, characterized in that, The sensor module includes: Door sensors used to collect door sensing signals; A seatbelt sensor used to collect seatbelt sensing signals; Seat sensors used to collect seat sensing signals; Accelerator pedal opening sensor used to collect accelerator pedal opening signal; Brake pedal opening sensor used to collect brake pedal opening signal.

9. The new energy vehicle as described in claim 7, characterized in that: The vehicle also includes a parking brake system. When the vehicle controller detects that the auxiliary braking conditions are met, it is also used to control the parking brake system to park the vehicle.

10. The new energy vehicle as described in claim 7, characterized in that: The vehicle also includes a motor controller and an alarm module; The vehicle controller is also used for: When the auxiliary braking determination condition is detected, the motor controller requests the powertrain to be enabled. When the system detects that the auxiliary braking conditions are met and parking is not possible, the control alarm module will issue an alarm.

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