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A control method and system for adjusting the speed stability of a range extender

A control method and range extender technology, which is applied in the directions of control drive, battery/battery traction, transportation and packaging, etc. It can solve the problem of not being able to quickly meet the power point response time, not considering the rapid adjustment of the range extender, and the range extender The problem of longer time in stable working conditions can improve NVH performance, eliminate torque response speed and torque difference, and offset impact

Active Publication Date: 2022-03-01
ZHEJIANG GEELY NEW ENERGY COMML VEHICLES CO LTD +2
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  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following deficiencies: 1) How to quickly adjust the range extender when signal interference is not considered; 2) When multiple operating point transitions, relying solely on engine speed control and generator torque control cannot quickly meet the power point. Due to the slow response time of the engine, the engine torque cannot keep up with the motor torque adjustment, resulting in a longer time for the range extender to reach a stable working condition; However, the prior art does not provide corresponding solutions to deal with emergencies

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  • A control method and system for adjusting the speed stability of a range extender
  • A control method and system for adjusting the speed stability of a range extender
  • A control method and system for adjusting the speed stability of a range extender

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Embodiment Construction

[0053] figure 1 A schematic flowchart of a control method for adjusting the rotational speed stability of a range extender according to an embodiment of the present invention is shown. The range extender includes an engine, a generator and a flywheel. Such as figure 1 As shown, the control method includes:

[0054] Step S100, outputting the target speed n of the engine according to the power request of the whole vehicle set and the target torque T of the generator set ;

[0055] Step S200, set the target torque T of the generator set as feedforward torque T forward , and make the engine respond to the feed-forward torque so that the engine speed approaches the target speed;

[0056] Step S300, when the engine speed is close to the target speed, maintain the engine within the target speed according to the PID speed closed-loop control.

[0057] In step S100, first receive the power request of the whole vehicle, and then output the target speed n of the engine according ...

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Abstract

The invention provides a control method and system for adjusting the rotation speed stability of a range extender. The control method includes the following steps: outputting the target speed n of the engine according to the power request of the whole vehicle set and the generator's target torque T set ; The target torque T of the generator set as feedforward torque T forward , and make the engine respond to the feed-forward torque, so that the speed of the engine approaches the target speed; when the speed of the engine is close to the target speed, the engine is maintained according to the PID speed closed-loop control within the target speed. The invention adopts the real-time torque compensation control method of the generator and the closed-loop precise control of the PID speed, so that the speed of the range extender can be continuously and stably output under the target power, and the fluctuation of the engine speed can be reduced, so as to reduce the vibration of the range extender system and improve the range extender. Overall NVH performance objectives.

Description

technical field [0001] The present invention relates to the technical field of new energy vehicles, in particular to a control method and system for adjusting the speed stability of a range extender. Background technique [0002] With the promotion of new energy technologies, range-extended electric vehicles have become more and more popular. Different from traditional pure electric vehicles, the biggest advantage of range-extended electric vehicles is their long cruising range, and its core components are mainly range extenders composed of engines, generators and their controllers. [0003] Although the appearance of the range extender can better solve the problem of the short cruising range of pure electric vehicles, the premise is to ensure that the range extender can continuously and stably output power. Among them, the speed stability of the range extender directly affects whether the range extender can work stably. Considering the harsh working conditions of the rang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L50/62B60L15/20
CPCB60L50/62B60L15/20Y02T10/62Y02T10/72Y02T10/70
Inventor 冯伟陈定邦马帅营徐秀华王一戎
Owner ZHEJIANG GEELY NEW ENERGY COMML VEHICLES CO LTD
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