change "automatic" is gradually taking hold and, with the advent of hybrid cars, is intended to completely replace the old manual in the near future.
then analyze the different types of change "automatic"
1.Robotizzato
It 's the easiest solution: the automatic gearbox shares the mechanics of a manual, in addition we have the drives that replace human intervention. As mentioned
is the easiest solution, and also the most economical, both in terms of construction (purchase) from that of maintenance and this is certainly his main advantage. The great value are
atro consumption: the consumer surplus due to the action of devices that replace the driver's feet and hands are perfectly balanced by a driving style "perfect", always under the watchful control electronics, which is why why the consumption of a car with automatic gearbox are the same or lower than those of a manual.
They come in many categories: from the cheapest and "poor" (Smart ForTwo) to expensive, high-performance (Ferrari F430 Scuderia).
The disadvantage of this type is the poor ride quality, since the change are perfectly audible.
2.With torque converter
often also called "traditional automatic." They have a completely different mechanism from manual transmissions. The clutch is replaced by a fluid coupling (torque converter) is therefore a great comfort, because gear changes very gradual.
However, the absence of a CV joint between the engine and gearbox, there is an increase in consumption, particularly in the city.
As before, there are lots of categories, the last made by ZF to improve performance have 8 gears are equipped with Stop & Start, and also a clutch (in addition to the converter).
3.Con dual clutch
are the latest additions and represent a masterpiece of engineering: there are two main shaft gear which can be sinconizzati turn with the flywheel on a prenseti marches are odd, on ' more equal: while defusing a gear is engaged at the same time interval.
This type combines the advantages of the other two, so we have a good ride comfort combined with excellent speed and change in consumption equal to those of a manual. Since the newly invented
are still not very common and very expensive (DSG VW, Audi S-Tronic, BMW M3, Ferrari California).
4.A continuously variable transmission (CVT)
are essentially equivalent to the change of a scooter, have a great continuity on their side of gear, then a great comfort, but they suffer from performance and fuel economy.
The mountain typically Japanese cars (Toyota iQ) and also the new Audi (multitronic).
E 'type gearbox fitted with hybrid cars.
