Method for early detection of damage in a motor vehicle transmission

A technology for transmissions and vehicles, applied in vibration measurement in solids, testing of machine/structural components, instruments, etc., can solve problems such as large computing costs, increase manufacturing costs, etc., achieve low computing costs, improve accuracy, and reliable discovery. damage effect

Inactive Publication Date: 2012-05-23
ZF FRIEDRICHSHAFEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned method has a great disadvantage: it requires a great computational expense in order to perform the Fourier transform and the cepstrum analysis
Accordingly, a control unit with large memory and high computing power is provided in the area of ​​the vehicle transmission, which significantly increases the manufacturing costs

Method used

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  • Method for early detection of damage in a motor vehicle transmission
  • Method for early detection of damage in a motor vehicle transmission
  • Method for early detection of damage in a motor vehicle transmission

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Embodiment Construction

[0020] exist figure 1 A flow diagram of the method according to the invention is shown in . Initially, for this purpose in a first step S1 mechanical vibrations are detected in the vehicle transmission by means of at least one acceleration sensor which is placed in the region of the transmission components and whose functional behavior is to be monitored. In step S2, the detected mechanical vibration is converted into an electrical signal a(t) by the at least one acceleration sensor, and the electrical signal a(t) is digitized in the following step S3. Acceleration figures obtained by the signal a (t) are compared with the reference value a in the next step S4 G Compare. Furthermore, the acceleration gradient Δa(t) in the signal a(t) is known and compared with the limit value Δa G Compare. In this case, however, in order to filter out interfering effects from the ascertained acceleration gradient Δa(t) and not take them into account during the comparison, at least one stee...

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Abstract

The invention relates to a method for the early detection of damage in a motor vehicle transmission, comprising at least one acceleration sensor, by means of which mechanical vibrations in the motor vehicle transmission are captured (S1) and converted into an electrical signal (a(t)) (S2), wherein the electrical signal (a(t)) is then digitalized (S3) and a comparison to a comparison parameter (aG) is then performed (S4), wherein the capturing of the mechanical vibrations is further performed at defined operating points of the motor vehicle transmission and acceleration amplitudes over a time curve (t) are determined from the digitalized electrical signal (a(t)), wherein states (Z(t)) are counted at which the acceleration amplitudes exceed the comparison parameter (aG), and wherein a calculated probability (P(t)) for damage to the motor vehicle transmission is determined (S5); using a number of the states (Z(t)). The invention further relates to a motor vehicle transmission, the damage thereof being able to be determined by means of the above method, and to a computer program product for performing the individual process steps.

Description

technical field [0001] The invention relates to a method for early detection in a vehicle transmission comprising at least one acceleration sensor by means of which mechanical vibrations in the vehicle transmission are detected and converted into electrical signals, wherein the electrical signals are then digitized , and compare it with the reference value in the subsequent process. Furthermore, the invention relates to a vehicle transmission in which damage can be detected according to the method, and to a computer program product for carrying out the individual method steps. Background technique [0002] Transmission control units of modern vehicle transmissions usually have a diagnostic device, by means of which, in the event of damage, further secondary damage to other components can be avoided by taking appropriate measures. Furthermore, sensors are used in some systems by means of which vibrations in the vehicle transmission can be detected, which in the case of extre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/02G01H1/00
CPCG01H1/003G01M13/021G01M13/028
Inventor 约尔格·库尔特胡贝特·凯尼格
Owner ZF FRIEDRICHSHAFEN AG
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