EP-4063982-B1 - PARKING CONTROL METHOD AND DEVICE, VEHICLE CONTROL UNIT, AND NEW-ENERGY VEHICLE

EP4063982B1EP 4063982 B1EP4063982 B1EP 4063982B1EP-4063982-B1

Inventors

ZHANG, Shuai
CHEN, Shujiang
HOU, Wentao
Dong, Xinran
SUN, Ce
SUN, JIAXIN
DENG, Weifeng

Dates

Publication Date: 20260506
Application Date: 20210107

Claims (15)

A method for parking control of a new-energy vehicle, executed by a vehicle controller, and comprising: determining (S110) whether a single-pedal mode is activated, wherein acceleration control, uniform speed control, and deceleration control of the vehicle are realized through one accelerator pedal in the single-pedal mode; determining (S120) whether conditions for deceleration control are met when the single-pedal mode is activated, wherein the conditions for deceleration control at least comprise that a gear is a driving gear, a creep mode is not activated, and a speed of the new-energy vehicle is not greater than a first preset value for a first preset time; controlling (S130) the new-energy vehicle to decelerate when the conditions for deceleration control are met; determining (S140) whether conditions for sending a brake request to a motor controller are met during a process of controlling the new-energy vehicle to decelerate, wherein the conditions for sending the brake request at least comprise that the speed of the new-energy vehicle is not greater than a second preset value for a second preset time, and wherein the second preset value is smaller than the first preset value; sending (S150) the brake request to the motor controller when the conditions for sending the brake request to the motor controller are met, whereby enabling the motor controller, in response to the brake request, to control the new-energy vehicle to enter a brake mode, to reduce the speed of the new-energy vehicle to be smaller than a third preset value, wherein the third preset value is smaller than the second preset value; and sending (S160) a parking request to an electronic handbrake when the new-energy vehicle is in the brake mode and the speed of the new-energy vehicle is smaller than the third preset value for a third preset time, to enable the new-energy vehicle to enter a parking mode.
The method for parking control of a new-energy vehicle according to claim 1, wherein the conditions for deceleration control further comprise one or more of the following items: no brake request is sent by the vehicle controller to the motor controller; an opening-degree of the accelerator pedal is not greater than a first preset opening-degree; a brake pedal is not enabled or a pressure of a master brake cylinder is not greater than a first preset pressure for a fourth preset time; both a handbrake and the electronic handbrake are not activated; an available electric power for driving is not smaller than a first preset power; and a power system of the new-energy vehicle has no fault.
The method for parking control of a new-energy vehicle according to claim 1 or 2, further comprising: controlling the new-energy vehicle to exit a deceleration driving, during the process of controlling the new-energy vehicle to decelerate, when the conditions for deceleration control are not met.
The method for parking control of a new-energy vehicle according to claim 1, wherein the conditions for sending the brake request further comprise one or more of the following items: an opening-degree of the accelerator pedal is not greater than a second preset opening-degree; a brake pedal is not enabled or a pressure of a master brake cylinder is not greater than a second preset pressure for a fifth preset time; the creep mode is not activated; the gear is the driving gear; both a handbrake and the electronic handbrake are not activated; an available electric power for driving is not smaller than a second preset power; and a power system of the new-energy vehicle has no fault.
The method for parking control of a new-energy vehicle according to claim 1 or 4, further comprising: determining, in response to the new-energy vehicle entering the brake mode, whether the conditions for sending the brake request are met; and sending a request for exiting the brake mode to the motor controller when the conditions for sending the brake request are not met, wherein the motor controller, in response to the request for exiting the brake mode, controls the new-energy vehicle to exit the brake mode.
The method for parking control of a new-energy vehicle according to claim 5, further comprising: sending, in case that the new-energy vehicle is in the parking mode, a request for exiting the parking mode to the electronic handbrake when the new-energy vehicle is controlled to exit the brake mode or the speed of the new-energy vehicle is not smaller than the third preset value.
The method for parking control of a new-energy vehicle according to claim 1, 4 or 5, wherein the controlling, in response to the brake request, the new-energy vehicle to enter the brake mode by the motor controller comprises: determining, by the motor controller, whether conditions for entering the brake mode are met, in response to receiving the brake request, wherein the conditions for entering the brake mode comprise that the brake request is received, the vehicle controller stops controlling the new-energy vehicle to decelerate, the motor speed is within a preset range for a sixth preset time, and the motor controller has no fault; and controlling the new-energy vehicle to enter the brake mode when the conditions for entering the brake mode are met, and wherein the method further comprises controlling, after the new-energy vehicle is entered the brake mode, the new-energy vehicle to exit the brake mode by the motor controller, when conditions for exiting the brake mode are met, and the conditions for exiting the brake mode comprise one or more of the following items: a request for exiting the brake mode is received; the vehicle controller starts to control the new-energy vehicle to decelerate; a motor speed is greater than a seventh preset value for a sixth preset time; and the motor controller has a fault.
A device for parking control of a new-energy vehicle, arranged on a vehicle controller, and comprising: a first determination module (610), configured to determine whether a single-pedal mode is activated, wherein acceleration control, uniform speed control, and deceleration control of the vehicle are realized through one accelerator pedal in the single-pedal mode; a second determination module (620), configured to determine whether conditions for deceleration control are met when the single-pedal mode is activated, and the conditions for deceleration control at least comprise that a speed of the new-energy vehicle is smaller than a first preset value for a first preset time; a control module (630), configured to control the new-energy vehicle to decelerate when the conditions for deceleration control are met; a third determination module (640), configured to determine whether conditions for sending a brake request to a motor controller are met during a process of controlling the new-energy vehicle to decelerate, wherein the conditions for sending the brake request at least comprise that the speed of the new-energy vehicle is not greater than a second preset value for a second preset time, and wherein the second preset value is smaller than the first preset value; a first sending module (650), configured to send the brake request to the motor controller when the conditions for sending the brake request to the motor controller are met, whereby enabling the motor controller, in response to the brake request, to control the new-energy vehicle to enter a brake mode, to reduce the speed of the new-energy vehicle to be smaller than a third preset value, wherein the third preset value is smaller than the second preset value; and a second sending module (660), configured to send a parking request to an electronic handbrake when the new-energy vehicle is in the brake mode and the speed of the new-energy vehicle is smaller than the third preset value for a third preset time.
The device for parking control of a new-energy vehicle according to claim 8, wherein the conditions for deceleration control further comprise one or more of the following items: no brake request is sent by the vehicle controller to the motor controller; an opening-degree of the accelerator pedal is not greater than a first preset opening-degree; a brake pedal is not enabled or a pressure of a master brake cylinder is not greater than a first preset pressure for a fourth preset time; both a handbrake and the electronic handbrake are not activated; an available electric power for driving is not smaller than a first preset power; and a power system of the new-energy vehicle has no fault.
The device for parking control of a new-energy vehicle according to claim 8, wherein the conditions for sending a brake request further comprise one or more of the following items: an opening-degree of the accelerator pedal is not greater than a second preset opening-degree; a brake pedal is not enabled or a pressure of a master brake cylinder is not greater than a second preset pressure for a fifth preset time; a creep mode is not activated; a gear is a driving gear; both a handbrake and the electronic handbrake are not activated; an available electric power for driving is not smaller than a second preset power; and a power system of the new-energy vehicle has no fault.
The device for parking control of a new-energy vehicle according to claim 8 or 10, wherein the third determination module is further configured to determine whether the conditions for sending the brake request are met in response to the new-energy vehicle entering the brake mode; and the first sending module is further configured to send a request for exiting the brake mode to the motor controller when the conditions for sending the brake request are not met, wherein the motor controller, in response to the request for exiting the brake mode, controls the new-energy vehicle to exit the brake mode.
The device for parking control of a new-energy vehicle according to claim 11, wherein the second sending module is further configured to send, in case that the new-energy vehicle is in the parking mode, a request for exiting the parking mode to the electronic handbrake when the new-energy vehicle is controlled to exit the brake mode or the speed of the new-energy vehicle is not smaller than the third preset value.
The device for parking control of a new-energy vehicle according to claim 8, 10 or 11, wherein the motor controller, in response to the brake request, controls the new-energy vehicle to enter the brake mode comprises that: the motor controller, in response to receiving the brake request, determines whether conditions for entering the brake mode are met, wherein the conditions for entering the brake mode comprise that the brake request is received, the vehicle controller stops controlling the new-energy vehicle to decelerate, the motor speed is within a preset range for a sixth preset time, and the motor controller has no fault; and the motor controller controls the new-energy vehicle to enter the brake mode when the conditions for entering the brake mode are met, and wherein the motor controller, after the new-energy vehicle is entered the brake mode, further controls the new-energy vehicle to exit the brake mode when conditions for exiting the brake mode are met, wherein the conditions for exiting the brake mode comprise one or more of the following items: a request for exiting the brake mode is received; the vehicle controller starts to control the new-energy vehicle to decelerate; a motor speed is greater than a seventh preset value for a sixth preset time; and the motor controller has a fault.
A vehicle controller, comprising the device for parking control of a new-energy vehicle according to any one of claims 8-13.
A new-energy vehicle, comprising the vehicle controller according to claim 14.

Description

TECHNICAL FIELD The present invention relates to the field of new-energy vehicle technology, and more particularly, to a method and a device for parking control of a new-energy vehicle, a vehicle controller, and a new-energy vehicle. BACKGROUND With the development of new-energy vehicle technology, the concept of "single pedal" control has gradually emerged in the new-energy vehicle industry in recent years, that is, the acceleration/uniform-speed/deceleration control of the vehicle can be realized through one accelerator pedal. The "single pedal" control can reduce the frequency of using a brake pedal, and thus the energy utilization rate and driving experience of the vehicle can be improved, and the driving fatigue can be reduced. In related technologies, however, there is no effective strategy for deceleration control that is performed based on the "single pedal" mode. CN 108 909 711 A discloses a control method of the vehicle which has the advantages that a boundary between OPD (one-pedal driving) control function activation and non-activation states is determined through the first preset vehicle V1; when the OPD function is non-activated. DE 10 2012 223866 A1 discloses a device for avoiding rolling against the direction of travel of an engaged driving stage for a motor vehicle comprising an electric drive system with an electric drive machine on an inclined surface. DE 10 2017 222819 A1 discloses a drive control system for a motor vehicle operable by an electric motor, having a speed step selector device and having an electronic control unit. US 2019/135249 A1 discloses s vehicle including a user-actuatable switch and a controller. When the switch is actuated, the controller is adapted to effect a regenerative braking command to actuate a regenerative brake system when a vehicle speed is above a threshold speed, and to effect a parking brake command to actuate an electric park brake when the vehicle speed is less than or equal to the threshold speed. WO 2017/002557 A1 discloses an acceleration and deceleration control device capable of suppressing a feeling of discomfort for a driver. SUMMARY In view of this, an object of the present invention is to provide a method for parking control of a new-energy vehicle, so as to realize a strategy for parking control in a single-pedal mode. In order to achieve the above object, embodiments of the present invention may be implemented as follows: A method for parking control of a new-energy vehicle is provided, which is executed by a vehicle controller. The method for parking control of a new-energy vehicle includes the follows steps: determining whether a single-pedal mode is activated; determining whether conditions for deceleration control are met when the single-pedal mode is activated; controlling the new-energy vehicle to decelerate when the conditions for deceleration control are met; determining whether conditions for sending a brake request to a motor controller are met during a process of controlling the new-energy vehicle to decelerate; sending the brake request to the motor controller when the conditions for sending a brake request to the motor controller are met; sending a parking request to an electronic handbrake when the new-energy vehicle is in the brake mode and the speed of the new-energy vehicle is smaller than the third preset value for a third preset time, to enable the new-energy vehicle to enter a parking mode. The conditions for deceleration control at least include that a gear is a driving gear, a creep mode is not activated, and a speed of the new-energy vehicle is not greater than a first preset value for a first preset time. The conditions for sending the brake request at least include that the speed is not greater than a second preset value for a second preset time, and the second preset value is smaller than the first preset value. The motor controller, in response to the brake request, controls the new-energy vehicle to enter a brake mode, to reduce the speed of the new-energy vehicle to be smaller than a third preset value, and the third preset value is smaller than the second preset value. Further, the conditions for deceleration control also include one or more of the following items: the vehicle is in a READY state; the single pedal is in a valid state; no brake request is sent by the vehicle controller to the motor controller; an opening-degree of an accelerator pedal is not greater than a first preset opening-degree; a brake pedal is not enabled or a pressure of a master brake cylinder is not greater than a first preset pressure for a fourth preset time; both a handbrake and the electronic handbrake are not activated; an available electric power for driving is not smaller than a first preset power, and a power system of the new-energy vehicle has no fault. Further, the method for parking control of a new-energy vehicle also includes a step of controlling the new-energy vehicle to exit a deceleration driving, during the process