differential gear - Hutchinson encyclopedia article about differential gear Printer Friendly
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differential
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differential

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The differential lies midway between the driving wheels of a motorcar. When the car is turning, the bevel pinions spin, allowing the outer wheel to turn faster than the inner wheel.

Arrangement of gears in the final drive of a vehicle's transmission system that allows the driving wheels to turn at different speeds when cornering. The differential consists of sets of bevel gears and pinions within a cage attached to the crown wheel. When cornering, the bevel pinions rotate to allow the outer wheel to turn faster than the inner.



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It also has quick-stroke hydraulic cylinders with externally mounted differential gears for fast mold open and closing.
The team also tested and rejected more complex and costly improvements, such as shock absorbers and differential gears.
Instead of a planetary gear, the Estima Hybrid uses a CVT (continuously variable transmission) in a compact front transaxle to transmit main motor energy, and adds a rear transaxle which combines a second motor and differential gear in a single unit, for a lightweight, compact structure that enables 4-wheel drive without a driveshaft.
 
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