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Engine speed control method with online setting of PID (proportion integration differentiation) parameters

A technology of engine speed and control method, which is applied in engine control, machine/engine, electrical control, etc. It can solve the problems of slow response, long stabilization time, poor adaptability and flexibility of PID parameter adjustment, etc., to reduce overshoot, Improved dynamic response and stability effects

Active Publication Date: 2015-04-01
AVIC NO 631 RES INST
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Problems solved by technology

The currently used speed adjustment control strategy basically adopts the traditional PID control operation. The traditional PID control process has slow response and long stabilization time, which cannot meet the requirements of speed control in terms of control response and stability.
[0005] In the current use of PID, methods for PID adjustment parameter changes have also been proposed one after another. PID parameter adjustment is performed by looking up tables or parameter settings. Poor adaptability and flexibility

Method used

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  • Engine speed control method with online setting of PID (proportion integration differentiation) parameters
  • Engine speed control method with online setting of PID (proportion integration differentiation) parameters
  • Engine speed control method with online setting of PID (proportion integration differentiation) parameters

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Embodiment Construction

[0052]Taking the start-up idle speed control of an engine as an example, the idle speed is between 700rpm and 900rpm, and the speed fluctuation curve of the engine using traditional PID control and the speed fluctuation curve of the dynamic setting of engine proportional parameters are respectively measured. Scale parameter setting value see image 3 shown in . Figure 4 Shown is the engine idle speed adjustment process of traditional PID control, Figure 5 Shown is the process of adjusting the engine idle speed after adjusting the proportional parameters according to the method in this paper.

[0053] From Figure 4 and Figure 5 It can be seen from the figure that the response time of speed adjustment using ID dynamic parameter adjustment is significantly faster than that of traditional PID control; after stabilization, the maximum speed fluctuation using traditional PID control is about ±15rpm, and the speed fluctuation of dynamic setting proportional parameters in this ...

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Abstract

The invention relates to an engine speed control method with online setting of PID (proportion integration differentiation) parameters, provides a method of online setting PID proportional parameters according to a speed value during engine speed control and aims to achieve quick and stable control of engine speed. According to the method, an engine speed error is calculated and mapped to different error ranges, increase rate of the engine speed error is calculated, PID proportional parameters are set, and the engine speed is adjusted quickly, with fewer fluctuations occurring. The method has the advantages that implementation is simple, applicable range is wide, experiments show that the method is evidently effective in terms of speed control quickness, stability, dynamic tracking performance and the like and is superior to the traditional PID control.

Description

technical field [0001] The invention belongs to the field of automobile control, and in particular relates to a method for controlling the rotational speed of an engine, aiming at improving the response speed and stability of the rotational speed control of the automobile engine. Background technique [0002] The dynamic response and stability of engine speed are important factors of engine performance index. The car is faced with frequent switching of various working conditions during urban road driving, which causes the engine speed to change continuously and the stable range of engine speed is different under different working conditions. The response speed and stability of engine speed changes not only affect the comfort of the driver, but also affect fuel combustion performance and emissions, so improving the response speed and stability of engine speed control is of great significance for improving engine performance indicators and achieving fuel economy . [0003] T...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/30F02D41/14F02D41/22
Inventor 刘明毛宁李娟王瑞张鹏仙
Owner AVIC NO 631 RES INST
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