Aeolus EQ-140 is one of the mass producing medium range heavy duty trucks in China. Some defects on its transmission have been detected. And their improving measures have come out in satisfactory results: (1) By improving the material of inner ring, the life of the synchronizer has increased by 100 times compared with its first prototype in 1969. (2) The fatigue life of 2nd speed gear has gone up by 10 times, with adopting more generous tooth root fillet radius and shot peening the tooth roots.
2nd International Pacific Conference on Automotive Engineering