1 / 9

End of Line Testing Whine Analysis Report (Updated)

End of Line Testing Whine Analysis Report (Updated). June 14 th , 2004. Summary . Recent testing at Hyundai has revealed gear whine with the production intent modules particularly at 96 th order. HMC furnished Metaldyne with 3 modules to characterize OK and NG levels for whine. ESN, OK

wilma
Download Presentation

End of Line Testing Whine Analysis Report (Updated)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. End of Line Testing Whine Analysis Report (Updated) June 14th, 2004

  2. Summary • Recent testing at Hyundai has revealed gear whine with the production intent modules particularly at 96th order. • HMC furnished Metaldyne with 3 modules to characterize OK and NG levels for whine. • ESN, OK • FCT, NG • FDM, NG • Metaldyne ran these 3 modules and a production module FEQ through the end of line test that Metaldyne will be conducting to determine if a performance criteria could be established to contain modules with this whine characteristic.

  3. Test Set-up • The part is driven directly, at the sprocket by an electric motor at 1200 rpm. • Acceleration data is captured and analyzed via an FFT. Fundamental orders are: • 56th equal to 70th on the engine • 76.8th equal to 96th on the engine • Analysis showed the the side band frequencies for each were as significant as the fundamental orders. Therefore, the following orders were summed to determine the acceptance criteria: • 54th to 58th orders for 56th order • 75th to 78.5th orders for 76.8th order

  4. Order Acceleration Data 56th Order = 70th Engine Order Sidebands

  5. Order Acceleration Data 76.8th Order = 96th Engine Order Sidebands

  6. Order Sum Data NG NG 1.25 Acceptance Criteria OK OK

  7. Conclusions • There was no identifiable differences found for any of the modules tested with regards to 70th order 31° HA input gear whine. • The end of line testing was able to detect differences in the performance of the OK vs. the NG modules for the 96th order transfer gear whine. • Acceptance criteria will be set to 1.25 to ensure HMC will be protected for whine noise. • Detailed investigation of gear geometries and housing dimensions ongoing to determine root cause of whine. • Estimated completion date of 28 June.

  8. Updates to June 9th File • The Summation is of all of the orders from 75th to 78.5th in 0.01 order increments. • The unit of measure is in g’s. • g’s is the measurement for gravity. This measurement is the output of the accelerometer and references vibration levels. • The next slide has a picture of the test stand and the accelerometer location. The one that has correlated the best is the vertical accelerometer. • Metaldyne is also looking at different metrics to evaluate for nicks and dings on gear teeth on this test stand also.

  9. Test Stand Pictures The vertical accelerations are being summed to detect the mesh noise concern.

More Related