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A method, device and medium for controlling the energy recovery intensity of electric vehicle coasting

A technology of energy recovery and electric vehicles, which is applied in electric vehicles, control devices, electric braking systems, etc., can solve the problems of small load power generation torque, sacrificing driving range, and poor driving experience, so as to improve driving range and improve Effect of coasting energy recovery

Active Publication Date: 2021-11-09
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the energy recovery systems used in electric vehicles include series and parallel systems. The series energy recovery system has the disadvantages of complex structure and control and high cost.
If a parallel energy recovery system is used, there are two existing control methods for coasting energy recovery intensity. Either consider the drivability of the vehicle and adopt the same design idea as the traditional fuel vehicle, sacrificing the driving range; or consider the vehicle’s continuous driving Mileage, directly adopt high-intensity power generation torque in the coasting phase, such as loading a fixed power generation torque, the intensity control is mainly to define 2 to 3 gears, which are switched by the driver himself, due to the method of loading a fixed power generation torque, if using The design idea is the same as that of traditional fuel vehicles. If the power generation torque is small, the mileage will be sacrificed; if the power generation torque is high, the driving experience will be poor.
The main reason is that the method of directly loading the fixed power generation torque cannot balance and take into account the drivability and economy (continuous driving mileage).

Method used

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  • A method, device and medium for controlling the energy recovery intensity of electric vehicle coasting
  • A method, device and medium for controlling the energy recovery intensity of electric vehicle coasting
  • A method, device and medium for controlling the energy recovery intensity of electric vehicle coasting

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Effect test

Embodiment 1

[0034] Such as figure 1 Shown is a schematic flow chart of a method for controlling the energy recovery intensity of an electric vehicle coasting provided by an embodiment of the present invention. figure 1 The method shown includes the following steps:

[0035] S101: Real-time monitoring of accelerator pedal opening and vehicle speed information while the vehicle is running;

[0036] S102: If the accelerator pedal opening is lower than the accelerator pedal opening threshold A%, and the vehicle speed is greater than or equal to the minimum coasting energy recovery speed u1, enter the coasting energy recovery stage;

[0037] S103: Detect the distance between the current vehicle and the vehicle in front, and obtain the deceleration a2 required for braking the current vehicle based on the distance;

[0038] S104: If the deceleration a2 is greater than the preset deceleration threshold a1 and is less than or equal to the maximum deceleration a_max allowed for coasting energy re...

Embodiment 2

[0057] Such as Figure 5 Shown is a schematic structural diagram of a device provided by an embodiment of the present invention, including:

[0058] A monitoring unit 501, configured to monitor the accelerator pedal opening and vehicle speed information in real time while the vehicle is running;

[0059] The first judgment execution unit 502 is used to enter the coasting energy recovery stage when the accelerator pedal opening is lower than the accelerator pedal opening threshold and the vehicle speed is greater than or equal to the minimum coasting energy recovery vehicle speed;

[0060] The deceleration acquisition unit 503 is used to detect the distance between the current vehicle and the vehicle in front, and acquire the deceleration required for braking the current vehicle based on the distance;

[0061] The second judgment execution unit 504 is configured to adjust the coasting energy recovery demand torque when the deceleration is greater than the preset deceleration t...

Embodiment 3

[0064] The present application also provides a computer-readable storage medium, such as flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), random access memory (RAM), static random access memory (SRAM), read-only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM), Magnetic Storage, Magnetic Disk, Optical Disk, Server, App Store, etc., on which computer programs, program When executed by the processor, the electric vehicle coasting energy recovery intensity control method in the method embodiment is realized.

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Abstract

The invention discloses a method, device and medium for controlling the energy recovery intensity of an electric vehicle, belonging to the field of electric vehicles. The realization of the method includes: monitoring the opening degree of the accelerator pedal and the vehicle speed information in real time during the running of the vehicle; If the acceleration pedal opening degree is lower than the accelerator pedal opening threshold, and the vehicle speed is greater than or equal to the minimum coasting energy recovery speed, it will enter the coasting energy recovery stage; detect the distance between the current vehicle and the vehicle in front, and obtain the deceleration required for the current vehicle braking based on the distance; if If the deceleration is greater than the preset deceleration threshold and is less than or equal to the maximum deceleration allowed for coasting energy recovery, adjust the coasting energy recovery demand torque so that the adjusted coasting energy recovery demand torque provides a deceleration equal to the deceleration required by the current vehicle braking. speed. The invention can ensure that the driver obtains the required deceleration by adjusting the opening of the accelerator pedal under most working conditions, improves the recovery rate of sliding energy, and further increases the mileage of the vehicle.

Description

technical field [0001] The invention belongs to the field of electric vehicles, and more specifically relates to a method, device and medium for controlling the energy recovery intensity of an electric vehicle when coasting. Background technique [0002] Currently, the energy recovery systems used in electric vehicles include series and parallel systems. The series energy recovery system has the disadvantages of complex structure and control, and high cost. If a parallel energy recovery system is used, there are two existing control methods for coasting energy recovery intensity. Either consider the drivability of the vehicle and adopt the same design idea as the traditional fuel vehicle, sacrificing the driving range; or consider the vehicle’s continuous driving Mileage, directly adopt high-intensity power generation torque in the coasting phase, such as loading a fixed power generation torque, the intensity control is mainly to define 2 to 3 gears, which are switched by th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/18
CPCB60L7/18B60L2240/12B60L2250/26
Inventor 黎浩王振滕培智韦于刚李迎浩
Owner DONGFENG MOTOR CORP HUBEI
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