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Method for preventing automotive power sunroof from being clamped

A sunroof, electric technology, applied in vehicle components, general control systems, circuits or fluid pipelines, etc., can solve the problems of difficult installation, high production cost, short life, etc. The effect of adjusting and anti-pinch response speed is fast

Inactive Publication Date: 2011-05-04
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The position detection of ordinary electric sunroofs uses mechanical limit switches, which have a series of shortcomings such as low precision, not easy to install, high production costs, and short life.

Method used

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  • Method for preventing automotive power sunroof from being clamped
  • Method for preventing automotive power sunroof from being clamped

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Experimental program
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Effect test

Embodiment Construction

[0020] The specific steps of the method for anti-clamping of electric sunroofs of automobiles are as follows:

[0021] Step (1) Initialize the controller of the electric sunroof. The initialization objects include the clock frequency of the single chip microcomputer in the controller, input and output, internal variables, registers, non-volatile memory and interrupts, and the anti-pinch threshold H.

[0022] Step (2) Initialize the transmission system of the electric sunroof, the initialization objects include the motor and the transmission mechanism, and obtain the stroke N of the motor and the average output force F of the motor 0 , and place N and F 0 stored in non-volatile memory;

[0023] The average output force F 0 for: F 0 = Σ n = 1 N F n / N

[0024] where F n is the instantaneous output ...

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Abstract

The invention relates to a method for preventing an automotive power sunroof from being clamped. The existing method has the disadvantages of low precision, difficult installation, high cost and short service life. The method comprises: firstly, initializing a controller and a drive system of the power sunroof to obtain a travel N and an average output force F0 of a motor; secondly, performing operation according to the button input of the user or an instruction of an LIN bus; if the instruction is 'open', allowing the motor to start to rotate positively; and if the instruction is 'close', allowing the motor to start to rotate reversely. In the process of 'closing', if the sunroof is not closed completely, an instant output force Fn of the motor is calculated; if Fn is more than or equal to F0, the variation of an output force delta F is calculated; and if delta F is more than or equal to an anti-clamping threshold value H, the motor is started to rotate reversely. The anti-clamping threshold value of the method is adjustable and flexible; the sunroofs is positioned accurately according to position signals so as to open or close the sunroof completely; and the method has high precision and rapid speed for preventing the automotive power sunroof from being clamped.

Description

technical field [0001] The invention belongs to the field of automobile electronics, and relates to a method for anti-clamping of electric sunroofs of automobiles. Background technique [0002] Ordinary electric sunroofs without anti-pinch function are easy to pinch passengers, which poses a serious safety hazard. Since the mid-1990s, the anti-pinch electric sunroof system has gradually appeared, and Europe and the United States have also issued corresponding safety regulations, including 74 / 60 / EEC in Europe and FMVSS118 in the United States. [0003] In the process of opening the electric sunroof, it must overcome various interferences such as gravity and friction before it can prevent pinching. The main problems to be overcome in the anti-trap algorithm design process are: (1) Accurately detect and quickly release obstacles within the detection area (4-200mm); (2) Ensure that the maximum force of the trapped obstacle is less than 100N; ( 3) Overcoming the influence of me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R16/023G05B19/042
Inventor 曾虹李二涛张翔戴国骏
Owner HANGZHOU DIANZI UNIV
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