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Control method, device and controller for preventing motor overheating of hybrid electric vehicle

A technology of hybrid electric vehicles and hybrid vehicles, which is applied in hybrid electric vehicles, motor vehicles, transportation and packaging, etc. It can solve the problems of motor overheating, changes, and the inability of the motor to provide sufficient power, etc., and achieve acceleration, acceleration and climbing , Prevent the motor from overheating and reduce the risk

Active Publication Date: 2022-02-01
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No matter in which state the motor is working, the temperature of the motor will change due to the change of the motor torque, especially when the required torque is large (for example: acceleration climbing, getting out of trouble), the motor may not be able to provide enough power However, it cannot meet the needs of the driver, and at the same time, the motor will overheat under high load conditions.
If the motor temperature is overheated, it may affect the performance of the motor

Method used

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  • Control method, device and controller for preventing motor overheating of hybrid electric vehicle
  • Control method, device and controller for preventing motor overheating of hybrid electric vehicle
  • Control method, device and controller for preventing motor overheating of hybrid electric vehicle

Examples

Experimental program
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Effect test

Embodiment 1

[0062] In the embodiment of the present invention, for a two-drive hybrid vehicle, the control flow is as follows:

[0063] (1) if figure 2 As shown, the power system includes a fuel tank 3, a power battery 6, an engine 2, a drive motor 5, a clutch 9, a transmission 8, a generator 10, a vehicle controller 1, a motor controller 4, and a differential 7, wherein the fuel tank 3 It is connected with the engine 2, the engine 2 is connected with the generator 10 through a fixed speed ratio, the engine 2 is connected with the clutch 9, the clutch 9 is connected with the transmission 8, the driving motor 5 is connected with the transmission 8, and the vehicle electronic control unit (VECU ) is connected with the engine 2 and the clutch 9, the battery 6 is connected with the motor controller 4, and the motor controller 4 is connected with the drive motor 5 and the generator 10.

[0064] (2) The vehicle controller obtains the vehicle speed / speed, motor temperature, battery power and p...

Embodiment 2

[0083] In the embodiment of the present invention, for a four-wheel-drive hybrid vehicle, the control flow is as follows:

[0084] In the embodiment of the present invention, for a four-wheel drive hybrid vehicle, only the case where the rear axle has no clutch is listed, and the control flow is as follows:

[0085] (1) if Figure 4 As shown, the power system includes a fuel tank 3, a power battery 6, an engine 2, a front drive motor 5, a rear drive motor 10, a clutch 13, a first transmission 12, a second transmission 9, a generator 14, a vehicle controller 1, and a front drive motor Controller 4, rear drive motor controller 7, first differential 11, second differential 8, wherein fuel tank 3 is connected with engine 2, engine 2 is connected with generator 14 through fixed speed ratio, engine 2 is connected with clutch 13, the clutch 13 is connected with the first transmission 12, the front drive motor 5 is connected with the first transmission 12, the vehicle controller VECU...

Embodiment 3

[0104] In another embodiment of the present invention, a control device for preventing motor overheating of a hybrid electric vehicle is also provided, including:

[0105] The signal acquisition unit is used to obtain vehicle speed or rotation speed, motor temperature, remaining battery power, and pedal opening degree from the CAN bus, and obtain the required torque of the vehicle according to the pedal opening degree, wherein the vehicle is a two-wheel-drive hybrid vehicle or a four-wheel-drive hybrid vehicle motor vehicle;

[0106] The control unit is used to judge the engine driving according to the vehicle speed or rotation speed, determine the working mode of the vehicle according to the temperature of the motor, the required torque and the remaining battery power, and then control the engagement or disengagement of the clutch according to the requirements of different working modes.

[0107] Wherein, for the specific implementation manners of each unit, reference may be ...

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Abstract

The invention discloses a control method, device and controller for preventing motor overheating of a hybrid electric vehicle, belonging to the field of motor control, wherein the realization of the method includes: obtaining vehicle speed or rotation speed, motor temperature, remaining battery power and pedals from a CAN bus Opening degree, and obtain the required torque of the vehicle according to the pedal opening degree, wherein, the vehicle is a two-wheel drive hybrid vehicle or a four-wheel drive hybrid vehicle; the vehicle speed or rotational speed is used as the basis for judging the engine drive, and the motor temperature, the required torque and the battery The remaining power determines the working mode of the vehicle, and then controls the engagement or disengagement of the clutch according to the requirements of different working modes. Adoption of the present invention can improve the dynamic performance of the vehicle, enhance the ability to accelerate climbing, get out of trouble, etc.; safety, and reduce the risk of damage to the motor.

Description

technical field [0001] The invention belongs to the field of motor control, and more specifically relates to a control method and device for preventing motor overheating of a hybrid electric vehicle, and a vehicle controller. Background technique [0002] A hybrid vehicle is a vehicle that obtains power from at least two types of on-board stored energy. Compared with a traditional vehicle that only uses fuel to drive the engine, a hybrid vehicle has a different power system working mode due to the addition of a motor and a power battery. The requirements for control technology are higher. [0003] The motor of a hybrid electric vehicle can work in two different working states, that is, the electric state and the power generation state. When the electric motor of the hybrid vehicle works in the electric state, it converts the electrical energy in the battery into mechanical energy to drive the car. When the electric motor of the hybrid electric vehicle works in the power gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/10B60W20/20B60W10/02B60W10/06B60W10/08
CPCB60W20/10B60W20/20B60W10/02B60W10/06B60W10/08B60W2520/10B60W2510/081B60W2510/087B60W2510/244B60W2710/021B60W2710/088Y02T10/62
Inventor 吴肇苏张丽章国光许永红李松
Owner DONGFENG MOTOR CORP HUBEI
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