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Leon Mk1

Calculating overall gear ratio „i“
Calculating overall gear ratio „i“
The gear ratio between two gears, is obtained by dividing the number of teeth on the driven gear (Z2), by the number of teeth on the driving gear (Z1).
Example:
   
Gears5. gearFinal group
driving gear (primary)
45 (Z1 = driving gear)19 (Z1 = driving gear)
driving gear (secondary)
34 (Z2 = driving gear)60 (Z2 = driving gear)

i = Z2 : Z1 → Remark
In this way we can find out:
iG = Gear ratio = ZG 2 : ZG 1 = 34 : 45 = 0,756
iA = Transmission ratio for bevel gear assembly = ZA2 : ZA1 = 60 : 19 = 3,158
It is obtained by multiplying the gear ratios of the longest gear and the differential.
itotal. = Overall ratio = iG x iA = 0.756 x 3.158 = 2.387
1)  Z1 = Number of teeth of driving gear, Z2 = number of teeth of driving gear.
   

General repair instructions > < Overview - power transmission