Transmission knocking noise test method, test device and evaluation method
An evaluation method and gearbox technology, applied in the automotive field, can solve the problems of unrecognized and ineffective response to the knock level of the gearbox, and achieve the effect of avoiding misjudgment
Active Publication Date: 2021-12-14
SAIC GENERAL MOTORS +1
View PDF26 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The currently commonly used noise assessment method based on sound pressure level cannot effectively reflect the actual knocking level of the gearbox; for this noise, the severity of the noise is qualitatively studied mainly through the subjective assessment method on the real vehicle; but the subjective assessment method of the whole vehicle Evaluation is limited by vehicle conditions and human factors, making it impossible to identify problems objectively and accurately in the early stages of gearbox development
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0029] It is easy to understand that, according to the technical solution of the present invention, those skilled in the art can propose multiple structural modes and implementation modes that can be replaced without changing the essence and spirit of the present invention. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or restriction on the technical solution of the present invention.
[0030] In the following description, various parameters and components are described for different constructed embodiments, and these specific parameters and components are only examples and do not limit the embodiments of the present application.
[0031] The present invention includes a testing method for knocking noise of a gearbox, which can be carried out in a standard three-motor semi-anechoic test room, for ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The application discloses a testing method, a testing device and an evaluation method for knocking noise of a gearbox. Gear box knocking noise testing method comprises the following steps: a) arranging a plurality of near-field microphones near the outer edge of the gearbox, and arranging far-field microphones at a distance of 0.9m to 1.1m from the gearbox; During the operation of the gearbox, the near-field microphone and the far-field microphone are respectively used to measure the noise signal of the gearbox. According to the gearbox knocking noise test method of the present invention, it is possible to quantitatively evaluate the knocking level of the gearbox during the development process of the gearbox body, avoiding misjudgments caused by waiting for vehicle resources and artificial evaluation, and providing a sound test for gearboxes and clutches during the development process. Development provides precise guidance.
Description
technical field [0001] The invention relates to the field of automobiles, in particular to a testing method for knocking noise of a gearbox, a testing device for knocking noise of a gearbox and an evaluation method for knocking noise of a gearbox. Background technique [0002] The knocking problem of the gearbox is a very common NVH problem in the development and application of the gearbox. The currently commonly used noise evaluation method based on sound pressure level cannot effectively reflect the actual knocking level of the gearbox; for this noise, the severity of the noise is qualitatively studied mainly through the subjective evaluation method on the real vehicle; but the subjective evaluation method of the whole vehicle Evaluation is limited by vehicle conditions and human factors, making it impossible to objectively and accurately identify problems early in transmission development. Contents of the invention [0003] The invention proposes a testing method for t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/028
CPCG01M13/028
Inventor 史佳薇林道福王鹏张立双刘涛闵益峰
Owner SAIC GENERAL MOTORS