The risk of gear tooth scuffing in commercial vehicletransmissions has gained more attention because of increasingdemand for fuel-efficient powertrain systems in which dieselengines run at lower speeds, power density is higher, andlubricants are modified to improve efficiency and compatibilitywith components of new technologies, such as dual clutchtransmissions. Thus, predicting scuffing risk during the designphase is vital for the development of commercial vehicletransmissions. AGMA 925-A03 is a comprehensive method to predictthe probability of gear scuffing. Therefore, this paper presentsthe AGMA 925-A03 scuffing risk predictions for a series of spur andhelical gear sets in transmissions that are used in commercialvehicles ranging from SAE class 3 through class 8. Limitingscuffing temperatures of mineral and synthetic lubricants weredetermined from FZG scuffing tests, dynamometer tests and fielddata. The agreement between prediction, test results and actualusage can provide confidence in the predictor of scuffing risk ofgears in commercial vehicle transmissions.
- Edition:
- 11
- Published:
- 10/01/2011
- Number of Pages:
- 11
- File Size:
- 1 file , 340 KB
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