AGMA 18FTM06 PDF

The hybrid vehicles seem to be the fastest solution for the containment of consumption and of pollution for personal transportation.

The designer of a hybrid transmission has to address additional issues with respect to the classical cases, in particular the high speed of the electric unit and the bidirectional motor/generator operation. In this case, a lot of attention should be paid to how to consider the four combinations of signs for torque and speed in the load spectrum for the gear calculation. The paper presents some topics, like several approaches for the alternating bending factor, the effects of the asymmetric crowning (especially the helix modification, tapered or parallel) and how to consider the housing stiffness in the TCA.

Finally, the paper presents an interesting solution from the kinematic point of view, the compound planetary, relatively well known in the automotive, but much less so in the industrial gearboxes design.

The data presented in the paper are taken from some recent jobs of the author. For reasons of confidentiality (the projects are still under development) there will be not quantification of the parameters, but only the description of the procedures followed, with details indicated in the bibliographical reference, and of the software used. The latter two types of information are probably the most interesting part of the paper, since they enable the reader to repeat the procedures by himself on his own context. The paper is therefore almost a guideline for the designers.