An issue of growing importance for the passenger car planetary-type automatic transmission recently has been the need for quieter operation than ever before. This paper presents an investigation into the loaded transmission error in a planetary gear system built within an actual automatic transmission. The effects of contact ratio of gear meshing, planetary gear spacing and counterphasing gearing conditions havee been described. The torsional vibration model of the planetary gear system developed in this investigation consideres different gear tooth profile error on each gear meshing as well as the load dependent variable gear mesh stiffness and the hub compliance of ring gear. The calculation results using this model show that the counterphasing gearing to eliminate the total planetary torsional variations keeps a remarkably low level of the transmission errors related to applied load, even though having little contactration and or large profile error on each gear mesh. The measurement of the loaded transmission error in the gears with various contact ratio and gear accuracy conditions have clarified to have been closely coincident with the calculation results, which are also ascertained in the transmission noise measured with actual automatic transmissions.
Loaded transmission error in a planetary gear system
Übersetzungsfehler in einem Planetengetriebe-System unter Belastung
1991
6 Seiten, 8 Bilder, 2 Tabellen, 8 Quellen
Aufsatz (Konferenz)
Englisch
Measurement Technique for Loaded Gear Transmission Error
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