Third Gear

Third gear





Gear rotation speed





^ Here we have the result on NRF=NSF.
^ Suppose the reduction ratio on the main shifting side is i3,





^ From the result of NRF=NSF in formula (1), the relation between the gear ratio in 3rd gear and the rotation speed of the front planetary gear set is indicated in the following formula:





Therefore,





^ Because the reduction ratio on the main shifting side is transmitted from the primary gear to the secondary gear, it can be calculated using the following formula:
The reduction ratio of the primary/secondary gear A = the number of primary gear teeth/the number of secondary gear teeth
Therefore,

^ Suppose the reduction ratio on the sub-shifting side is ii3,





^ From the result NSS=0 in formula (1), the rotation speed of the secondary planetary gear unit can be calculated using the following formula.





Therefore,





And the reduction ratio of 3rd gear=





As a result, the reduction ratio of 3rd gear is 1.285.