Fourth Gear

Fourth gear





Gear rotation speed





^ Suppose gear ratio in fourth gear is i4,





^ From the result of NSR=0 in formula (2), the relation between the gear ratio in fourth gear and the rotation speed of the rear 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,
A=82/86=0.9535
^ Suppose the reduction ratio on the sub-shifting side is ii4,





^ 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





As a result, the reduction ratio of 4th gear is 0.933.