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A method for estimating clutch transmission torque in real time using vehicle engine torque

A technology of engine clutch and engine torque, which is applied in the direction of instruments, calculations, special data processing applications, etc., can solve the problems of large error, clutch speed error, and many factors affecting interference torque, and achieve the effect of easy control and high precision

Active Publication Date: 2018-03-02
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many factors affecting the disturbance torque, and the correction of the Kalman filter only works when the internal combustion engine is started, and the correction is based on the clutch speed error between the model and reality, which requires high requirements for the model and relatively large errors

Method used

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  • A method for estimating clutch transmission torque in real time using vehicle engine torque
  • A method for estimating clutch transmission torque in real time using vehicle engine torque
  • A method for estimating clutch transmission torque in real time using vehicle engine torque

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Embodiment 1

[0041] figure 2 A flow of a method for estimating clutch transmission torque in real time using vehicle engine torque is shown, image 3 is a structural diagram of a Kalman filter algorithm, the vehicle engine torque refers to the output torque of the vehicle engine, and the clutch transfer torque refers to the clutch dynamic friction transfer torque. combine figure 2 and image 3 , when the vehicle works normally, the method steps are:

[0042] Step 1: Initialize the engine angular velocity estimate Estimation of engine angular acceleration System state vector X k and the estimated error covariance matrix P 0 ;Initialize angular velocity estimate Initialize the sampling interval T k ; Among them, k is k time, k=1, 2, ... t / T k ;t is the sampling time;

[0043] Initialize angular acceleration estimate

[0044] Initialize the system state vector X 1 =[0;0;0;0];

[0045] Initialize the covariance P 0 =[1,0,0,0; 0,1,0,0; 0,0,1,0; 0,0,0,1].

[0046] Step 2: t...

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Abstract

The invention discloses a method for estimating clutch transmission torque in real time by using vehicle engine torque. By deriving the vehicle law, that is, the discrete state space model of the clutch system, and using the classic discrete Kalman filter algorithm, the engine torque, engine angular velocity, and engine angular acceleration are calculated in real time. Calculate the estimated value of clutch transmission torque, which can be used in vehicle automatic clutch control system to estimate the torque transmitted in the process of clutch separation and engagement in real time.

Description

technical field [0001] The invention belongs to the technical field of parameter estimation and control of a vehicle power transmission system, and in particular relates to a method for estimating the transmission torque of a friction clutch of a vehicle in real time according to the engine torque. Background technique [0002] Vehicle engine clutch system such as figure 1 As shown, the current automatic clutch often takes the speed or speed difference between the main and slave ends of the clutch as the control target, and realizes the control of clutch separation and engagement by controlling the action of the actuator. Since the engine and the clutch have nonlinear characteristics, how to ensure a good control effect under various working conditions is a problem. [0003] If the friction torque transmitted by the clutch can be measured online in real time, the size of the torque transmission can be estimated in time according to the real-time engine torque and speed chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 陈宏伟张小帅杨猛张欣
Owner BEIJING JIAOTONG UNIV
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