阅读说明：本技术 纯电动汽车定速巡航减速控制方法及装置 (Speed reduction control method and device for constant-speed cruising of pure electric vehicle ) 是由 李璞 肖岩 曲帅 丁祥 崔挺 崔剑 李江有 于 2020-12-24 设计创作，主要内容包括：本发明实施例提供一种纯电动汽车定速巡航减速控制方法及装置,所述方法包括：接收到减速指令后,根据减速指令获取对应的减速度,并根据减速度计算需要的回收扭矩；获取电池回充功率,并将电池回充功率与回收扭矩需求的功率进行对比；当电池回充功率小于回收扭矩需求的功率,通过回收扭矩需求的功率和所述电池回充功率计算剩余功率；将剩余功率发送到ibooster,并通过ibooster完成剩余功率。采用本方法能够在电池状态无论是否允许减速回充时,都可以减速,并且在减速的时候保持减速的用户车辆的减速度及驾驶感。(The embodiment of the invention provides a speed reduction control method and device for a pure electric vehicle at a constant speed, wherein the method comprises the following steps: after receiving the deceleration instruction, acquiring corresponding deceleration according to the deceleration instruction, and calculating required recovery torque according to the deceleration; acquiring battery recharging power, and comparing the battery recharging power with the power required by torque recovery; when the battery recharging power is smaller than the power required by the torque recycling, calculating the residual power through the power required by the torque recycling and the battery recharging power; the remaining power is transmitted to the ibooster and is accomplished through the ibooster. By adopting the method, the deceleration can be realized no matter whether the deceleration recharging is allowed or not in the battery state, and the deceleration and the driving feeling of the decelerated user vehicle can be kept during the deceleration.)

1. A speed reduction control method for constant-speed cruising of a pure electric vehicle is characterized by comprising the following steps:

after a deceleration instruction is received, acquiring corresponding deceleration according to the deceleration instruction, and calculating required recovery torque according to the deceleration;

acquiring battery recharging power, and comparing the battery recharging power with the power required by the recovered torque;

when the battery recharging power is smaller than the power required by the recovery torque, calculating the residual power through the power required by the recovery torque and the battery recharging power;

transmitting the remaining power to the ibooster, and completing the remaining power through the ibooster.

2. The pure electric vehicle cruise deceleration control method according to claim 1, wherein said sending the remaining power to ibooster further comprises:

acquiring an activation flag bit of constant-speed cruise deceleration control, and detecting whether the activation flag bit is effective or not;

and when the activation flag bit is valid, sending the activation flag bit and a valid result to the ibooster.

3. The pure electric vehicle cruise deceleration control method according to claim 1, wherein said sending the remaining power to ibooster and before completing the remaining power by the ibooster, further comprises:

detecting whether an ibooster activation flag bit and a corresponding valid result sent by the ibooster are received;

and when receiving the ibooster activation flag bit and the corresponding valid result sent by the ibooster, sending the residual power to the ibooster, and completing the residual power through the ibooster.

4. The pure electric vehicle cruise control method according to claim 1, wherein after receiving a deceleration command, obtaining a corresponding deceleration according to the deceleration command, and calculating a required recovery torque according to the deceleration, comprises:

after the deceleration instruction is received, the current vehicle speed is obtained, and the table is looked up for the constant-speed cruising vehicle speed to obtain the common vehicle speed;

calculating the deceleration according to the common vehicle speed and the current vehicle speed, and calculating corresponding force according to the deceleration;

calculating a recovery torque required by the vehicle motor based on the force.

5. The pure electric vehicle cruise deceleration control method according to claim 1, characterized by further comprising:

and when the battery recharging power is larger than the power required by the recovery torque, completing the recovery torque through a vehicle motor.

6. The pure electric vehicle cruise deceleration control method according to claim 1, characterized by further comprising:

when the battery recharge power is not detected, transmitting the power of the recovery torque request to the ibooster, and completing the power of the recovery torque request through the ibooster.

7. A pure electric vehicles cruise control device that slows down, its characterized in that, the device includes:

the receiving module is used for acquiring corresponding deceleration according to the deceleration instruction after receiving the deceleration instruction, and calculating required recovery torque according to the deceleration;

the acquisition module is used for acquiring battery recharging power and comparing the battery recharging power with the power required by the recovered torque;

the calculation module is used for calculating the residual power according to the power required by the recovery torque and the battery recharging power when the battery recharging power is smaller than the power required by the recovery torque;

and the sending module is used for sending the residual power to the ibooster and finishing the residual power through the ibooster.

8. The pure electric vehicle cruise deceleration control device according to claim 7, characterized in that said device further comprises:

the second acquisition module is used for acquiring an activation zone bit of the constant-speed cruise deceleration control and detecting whether the activation zone bit is effective or not;

a second sending module, configured to send the activation flag and the valid result to the ibooster when the activation flag is valid.

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the cruise deceleration control method according to any one of claims 1 to 6 when executing the program.

10. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the cruise deceleration control method according to any of claims 1 to 6.

Technical Field

The invention relates to the technical field of pure electric vehicles, in particular to a method and a device for controlling constant-speed cruising and deceleration of a pure electric vehicle.

Background

For the current pure electric new energy automobile, the existing control method for cruise at constant speed and deceleration is as follows: in the constant-speed cruising process, a driver realizes a deceleration function by operating a deceleration key, the vehicle control unit identifies the deceleration required by the current driver, calculates the required recovery torque at the moment, and decelerates by utilizing the recovery function, so that the deceleration can be realized, the energy of the whole vehicle can be saved, and the cruising mileage is increased.

However, sometimes the battery state is in a state that the recharging current is not allowed (the SOC is high or the temperature is low, etc.), at this time, the deceleration can be performed only by the wind resistance and the ground friction, the deceleration effect is poor, the driver demand cannot be accurately realized, and the driving feeling is poor.

Disclosure of Invention

Aiming at the problems in the prior art, the embodiment of the invention provides a method and a device for controlling the constant-speed cruising and deceleration of a pure electric vehicle.

The embodiment of the invention provides a speed reduction control method for constant-speed cruising of a pure electric vehicle, which comprises the following steps:

after a deceleration instruction is received, acquiring corresponding deceleration according to the deceleration instruction, and calculating required recovery torque according to the deceleration;

acquiring battery recharging power, and comparing the battery recharging power with the power required by the recovered torque;

when the battery recharging power is smaller than the power required by the recovery torque, calculating the residual power through the power required by the recovery torque and the battery recharging power;

transmitting the remaining power to the ibooster, and completing the remaining power through the ibooster.

In one embodiment, the method further comprises:

acquiring an activation flag bit of constant-speed cruise deceleration control, and detecting whether the activation flag bit is effective or not;

and when the activation flag bit is valid, sending the activation flag bit and a valid result to the ibooster.

In one embodiment, the method further comprises:

detecting whether an ibooster activation flag bit and a corresponding valid result sent by the ibooster are received;

and when receiving the ibooster activation flag bit and the corresponding valid result sent by the ibooster, sending the residual power to the ibooster, and completing the residual power through the ibooster.

In one embodiment, the method further comprises:

after the deceleration instruction is received, the current vehicle speed is obtained, and the table is looked up for the constant-speed cruising vehicle speed to obtain the common vehicle speed;

calculating the deceleration according to the common vehicle speed and the current vehicle speed, and calculating corresponding force according to the deceleration;

calculating a recovery torque required by the vehicle motor based on the force.

In one embodiment, the method further comprises:

and when the battery recharging power is larger than the power required by the recovery torque, completing the recovery torque through a vehicle motor.

In one embodiment, the method further comprises:

when the battery recharge power is not detected, transmitting the power of the recovery torque request to the ibooster, and completing the power of the recovery torque request through the ibooster.

The embodiment of the invention provides a speed reduction control device for constant-speed cruising of a pure electric vehicle, which comprises:

the receiving module is used for acquiring corresponding deceleration according to the deceleration instruction after receiving the deceleration instruction, and calculating required recovery torque according to the deceleration;

the acquisition module is used for acquiring battery recharging power and comparing the battery recharging power with the power required by the recovered torque;

the calculation module is used for calculating residual power according to the power required by the recovery torque and the battery recharging power when the battery recharging power is smaller than the power required by the recovery torque;

and the sending module is used for sending the residual power to the ibooster and finishing the residual power through the ibooster.

In one embodiment, the apparatus further comprises:

the second acquisition module is used for acquiring an activation zone bit of the constant-speed cruise deceleration control and detecting whether the activation zone bit is effective or not;

a second sending module, configured to send the activation flag and the valid result to the ibooster when the activation flag is valid.

The embodiment of the invention provides electronic equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize the steps of the cruise and deceleration control method of the pure electric vehicle at the constant speed.

The embodiment of the invention provides a non-transitory computer readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the cruise deceleration control method for a pure electric vehicle at a constant speed.

According to the speed reduction control method and device for the constant-speed cruising of the pure electric vehicle, after the speed reduction instruction is received, the corresponding speed reduction is obtained according to the speed reduction instruction, and the required recovery torque is calculated according to the speed reduction; acquiring battery recharging power, and comparing the battery recharging power with the power required by torque recovery; when the battery recharging power is smaller than the power required by the torque recycling, calculating the residual power through the power required by the torque recycling and the battery recharging power; the remaining power is transmitted to the ibooster and is accomplished through the ibooster. Thus, the vehicle can be decelerated regardless of whether the battery state permits deceleration recharging, and the deceleration and driving feeling of the decelerated user vehicle are maintained during deceleration.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a flowchart of a cruise deceleration control method for a pure electric vehicle according to an embodiment of the present invention.

FIG. 2 is a structural diagram of a constant-speed cruise deceleration control device of a pure electric vehicle according to an embodiment of the invention;

fig. 3 is a schematic structural diagram of an electronic device in an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a schematic flow diagram of a method for controlling constant-speed cruising and deceleration of a pure electric vehicle according to an embodiment of the present invention, and as shown in fig. 1, the embodiment of the present invention provides a method for controlling constant-speed cruising and deceleration of a pure electric vehicle, including:

and step S101, after receiving a deceleration instruction, acquiring corresponding deceleration according to the deceleration instruction, and calculating required recovery torque according to the deceleration.

Specifically, after receiving a deceleration instruction of the user vehicle, obtaining a deceleration corresponding to the user vehicle according to the deceleration instruction, and calculating a recovery torque required by a motor of the user vehicle when the user vehicle decelerates according to the deceleration, the specific steps may be: after receiving a deceleration instruction, acquiring a current vehicle speed, looking up a table of a constant-speed cruise vehicle speed to obtain a common vehicle speed when a user vehicle normally runs, calculating the deceleration of the user vehicle according to the common vehicle speed and the current vehicle speed, and calculating a corresponding force (F) according to the deceleration; the recovery torque required by the vehicle motor is then calculated from the force required for deceleration.

And step S102, obtaining battery recharging power, and comparing the battery recharging power with the power required by the torque recovery.

Specifically, the battery recharging power of the user vehicle during deceleration is acquired, and then the battery recharging power is compared with the power required by the recovery torque required by the deceleration, so as to judge whether the power of the motor of the user vehicle can meet the power required by the user vehicle during deceleration.

And step S103, when the battery recharging power is smaller than the power required by the recovery torque, calculating the residual power according to the power required by the recovery torque and the battery recharging power.

Specifically, when the battery recharging power of the user vehicle is smaller than the power of the deceleration recovery torque demand of the user vehicle, which indicates that the motor of the user vehicle cannot independently complete the deceleration of the user vehicle, the remaining power is calculated according to the power of the recovery torque demand and the battery recharging power, and the remaining power is the difference power when the motor of the user vehicle completes the deceleration recovery torque demand.

Step S104, transmitting the residual power to the ibooster, and completing the residual power through the ibooster.

Specifically, the remaining power of the user vehicle that completes deceleration is transmitted to the ibooster, and the remaining power of the user vehicle that completes deceleration is transmitted through the ibooster.

In addition, before sending the remaining power to the ibooster, an activation flag bit of the constant-speed-cruise deceleration control may be acquired, whether the activation flag bit is valid is detected, and when the activation flag bit (deceleration value) is valid, the activation flag bit and a valid result are sent to the ibooster, that is, the ibooster of the user vehicle needs to receive the activation flag bit and the validity of the constant-speed-cruise control sent by the vehicle controller, and then corresponding hydraulic braking may be executed.

In addition, before sending the remaining power to the ibooster and completing the remaining power through the ibooster, whether the ibooster activation flag bit and the corresponding valid result sent by the ibooster are received or not can be detected, and when the ibooster activation flag bit and the corresponding valid result sent by the ibooster are received, the remaining power is sent to the ibooster and the remaining power is completed through the ibooster, that is, when the user vehicle controller needs to receive the ibooster activation flag bit and the valid bit at the same time, the signal of the user vehicle controller can be used for performing correlation calculation.

According to the cruise deceleration control method for the pure electric vehicle, after a deceleration instruction is received, the corresponding deceleration is obtained according to the deceleration instruction, and the required recovery torque is calculated according to the deceleration; acquiring battery recharging power, and comparing the battery recharging power with the power required by torque recovery; when the battery recharging power is smaller than the power required by the torque recycling, calculating the residual power through the power required by the torque recycling and the battery recharging power; the remaining power is transmitted to the ibooster and is accomplished through the ibooster. Thus, the vehicle can be decelerated regardless of whether the battery state permits deceleration recharging, and the deceleration and driving feeling of the decelerated user vehicle are maintained during deceleration.

On the basis of the above embodiment, the speed reduction control method for constant-speed cruising of the pure electric vehicle further includes:

and when the battery recharging power is larger than the power required by the recovery torque, completing the recovery torque through a vehicle motor.

In the embodiment of the invention, when the battery recharging power is larger than the power required by the recovery torque, the motor of the user vehicle can independently complete deceleration, and the torque recovery is completed through the vehicle motor without ibooster.

In addition, when the battery recharge power is not detected, the power of the recovery torque request is transmitted to the ibooster and the work of recovering the torque request is completed by the ibooster, i.e., when the user vehicle battery does not allow the recharge, then the overall deceleration is all performed by the ibooster relying on hydraulic braking.

According to the embodiment of the invention, the motor and the ibooster of the user vehicle can be dynamically adjusted to complete the deceleration of the user vehicle.

Fig. 2 is a constant-speed cruise deceleration control device of a pure electric vehicle according to an embodiment of the present invention, including: a receiving module 201, an obtaining module 202, a calculating module 203, and a sending module 204, wherein:

the receiving module 201 is configured to, after receiving a deceleration instruction, obtain a corresponding deceleration according to the deceleration instruction, and calculate a required recovery torque according to the deceleration.

An obtaining module 202, configured to obtain a battery recharging power, and compare the battery recharging power with the power required for recovering the torque.

A calculating module 203, configured to calculate a remaining power according to the power required for recovering the torque and the battery recharging power when the battery recharging power is smaller than the power required for recovering the torque.

A sending module 204, configured to send the remaining power to the ibooster, and complete the remaining power through the ibooster.

In one embodiment, the apparatus may further comprise:

and the second acquisition module is used for acquiring an activation zone bit of the constant-speed cruise deceleration control and detecting whether the activation zone bit is effective or not.

A second sending module, configured to send the activation flag and the valid result to the ibooster when the activation flag is valid.

In one embodiment, the apparatus may further comprise:

and the detection module is used for detecting whether the ibooster activation flag bit sent by the ibooster and a corresponding effective result are received.

And a third sending module, configured to send the remaining power to the ibooster and complete the remaining power through the ibooster when receiving the ibooster activation flag bit and the corresponding valid result sent by the ibooster.

In one embodiment, the apparatus may further comprise:

and the second receiving module is used for obtaining the current vehicle speed after receiving the deceleration instruction, and looking up the table of the constant-speed cruise vehicle speed to obtain the common vehicle speed.

And the first calculation module is used for calculating the deceleration according to the common vehicle speed and the current vehicle speed and calculating corresponding force according to the deceleration.

And the second calculation module is used for calculating the recovery torque required by the vehicle motor according to the force.

For specific limitations of the speed-stabilizing and cruising deceleration control device for the pure electric vehicle, reference may be made to the above limitations of the speed-stabilizing and cruising deceleration control method for the pure electric vehicle, and details are not described herein again. All modules in the speed reduction control device for the pure electric vehicle for cruising at the constant speed can be completely or partially realized through software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

Fig. 3 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 3: a processor (processor)301, a memory (memory)302, a communication Interface (Communications Interface)303 and a communication bus 304, wherein the processor 301, the memory 302 and the communication Interface 303 complete communication with each other through the communication bus 304. The processor 301 may call logic instructions in the memory 302 to perform the following method: after receiving the deceleration instruction, acquiring corresponding deceleration according to the deceleration instruction, and calculating required recovery torque according to the deceleration; acquiring battery recharging power, and comparing the battery recharging power with the power required by torque recovery; when the battery recharging power is smaller than the power required by the torque recycling, calculating the residual power through the power required by the torque recycling and the battery recharging power; the remaining power is transmitted to the ibooster and is accomplished through the ibooster.

Furthermore, the logic instructions in the memory 302 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the transmission method provided in the foregoing embodiments when executed by a processor, and for example, the method includes: after detecting the power-on operation, operating a Bootloader1, and performing a preset initialization operation through a Bootloader 1; after receiving the deceleration instruction, acquiring corresponding deceleration according to the deceleration instruction, and calculating required recovery torque according to the deceleration; acquiring battery recharging power, and comparing the battery recharging power with the power required by torque recovery; when the battery recharging power is smaller than the power required by the torque recycling, calculating the residual power through the power required by the torque recycling and the battery recharging power; the remaining power is transmitted to the ibooster and is accomplished through the ibooster.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.