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Extended-range electric vehicle, and vehicle control unit, power generation control method and power generation control system of extended-range electric vehicle

A vehicle controller and power generation control technology, applied in the field of electric vehicle control, can solve problems such as low economy and stability, large fluctuations in power generation, and slow engine response

Active Publication Date: 2013-10-23
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the embodiment of the present application provides a power generation control method of an extended-range electric vehicle. By performing closed-loop control on the speed of the generator, the power generation control of the extended-range electric vehicle is realized, which solves the problem of slow response speed of the engine and reduces the The closed-loop control of the speed brings about large fluctuations in power generation, and the problems of low economy and stability of the vehicle

Method used

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  • Extended-range electric vehicle, and vehicle control unit, power generation control method and power generation control system of extended-range electric vehicle
  • Extended-range electric vehicle, and vehicle control unit, power generation control method and power generation control system of extended-range electric vehicle
  • Extended-range electric vehicle, and vehicle control unit, power generation control method and power generation control system of extended-range electric vehicle

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Embodiment 1

[0044] It should be noted that the embodiment of the present application is applied to a situation where the power battery of the electric vehicle is low and the range-extending mode needs to be activated.

[0045] The flow chart of a power generation control method for an extended-range electric vehicle provided in Embodiment 1 of the present application is as follows: figure 1 shown, including:

[0046] Step S101: When it is detected that the electric quantity of the power battery does not meet the preset condition, obtain the generated power of the whole vehicle, and decompose the generated power of the whole vehicle into target speed and target torque;

[0047]In order to improve the power generation efficiency, fuel consumption and emissions of electric vehicles, electric vehicles will be calibrated with several fixed power values ​​when they leave the factory, instead of continuously changing. Specifically, the generated power of the whole vehicle can be calculated acco...

Embodiment 2

[0071] A schematic structural diagram of a vehicle controller for an extended-range electric vehicle provided in Embodiment 2 of the present application is as follows: image 3 shown, including:

[0072] A detection module 301, an acquisition module 302 and a control module 303; wherein,

[0073] The detection module 301 is used to detect the electric quantity of the power battery, and judge whether the electric quantity satisfies the preset condition;

[0074] The obtaining module 302 is used to obtain the generated power of the whole vehicle when the electric quantity of the power battery does not meet the preset condition, decompose the generated power of the whole vehicle into target speed and target torque, and obtain the speed of the generator in real time;

[0075] The control module 303 is used to control the generator to start the speed mode according to the target speed, and at the same time control the engine to output a constant torque; when the speed of the gener...

Embodiment 3

[0085] A schematic structural diagram of a power generation control system for an extended-range electric vehicle provided in Embodiment 3 of the present application is as follows Figure 5 shown, including:

[0086] Vehicle controller 501, motor control system 502 and EFI control system 503;

[0087] The vehicle controller 501 is used to send a speed start command to control the generator to start the speed mode according to the target speed when the electric power of the power battery does not meet the preset condition, and at the same time send the first torque to control the engine to output a constant torque output command; when the rotational speed of the generator reaches the target rotational speed, send a second torque output command to control the engine to output the target torque; when the electric power of the power battery meets the preset condition or there is an external power supply to charge the power battery , sending an instruction for controlling the stop...

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Abstract

The invention discloses a power generation control method for an extended-range electric vehicle. The power generation control method includes acquiring generated power of the integral vehicle and dissolving the generated power of the integral vehicle into a target rotation speed and target torque; controlling a power generator to start a rotation speed mode according to the target rotation speed and simultaneously controlling an engine to output constant torque; acquiring the rotation speed of the power generator in real time, and controlling the engine to output the target torque when the rotation speed of the power generator reaches the target rotation speed; controlling the engine and the power generator to stop running when a situation that the quantity of electricity of a power battery meets preset conditions or the power battery is charged by an external power source is detected. The invention further discloses the extended-range electric vehicle and a vehicle control unit and a power generation control system of the extended-range electric vehicle. The power generation control method, the extended-range electric vehicle, the vehicle control unit and the power generation control system have the advantages that the rotation speed of the power generator is controlled in a closed-loop manner by the power generation control method, so that power generation of the extended-range electric vehicle is controlled, the problem of slow response speed of an existing engine is solved, and problems of high generated power fluctuation and low economical efficiency and stability of an existing integral vehicle due to closed-loop control for the rotation speed of the existing engine are solved.

Description

technical field [0001] The present application relates to the technical field of electric vehicle control, in particular to a range-extended electric vehicle, its vehicle controller, and a power generation control method and system. Background technique [0002] The range-extended electric vehicle is a pure electric drive electric vehicle equipped with ground charging function and on-board power supply function. Its power system includes: power battery, generator, engine, vehicle control system, EFI control system and motor control system . [0003] There are two working modes of the extended-range electric vehicle: one is the pure electric working mode, at this time, the power battery is sufficient, and the driving energy of the vehicle comes from the power battery. The power battery provides energy to the motor, and the motor converts electrical energy into mechanical energy and provides it to the wheels When the vehicle is running, neither the generator nor the engine wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/18B60W10/06B60W10/08
Inventor 严钦山邓柯军苏岭胡振伟黄亮
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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