Comment fonctionne une boîte à double embrayage ?

How does a dual clutch box work?

The dual clutch boxes

are automatic speed boxes

their complexity is explained here

where we will show a four-speed box

a dual-clutch box

functions like a manual box

but the difference is the dual clutch

the clutch can be multi-disk

like in this video

or a mono-disk

The first multi-disk clutch

is made with a hollow-shaft

the second clutch is located in front of the first

its shaft in inserted within the first

The two clutches are linked to two manual gear boxes

which are linked to the output wheel

The front clutch actions the speeds in pairs

the first and third speed

while the rear shaft the second and fourth.

all the clutches share a front wall

which actions the wheels of the vehicle.

The synchromeshes are used to syncrhonized the dented wheels

and fix the wheel to the shaft

Now let's examine how gears are changed

On first gear, the red clutch is engaged

and transfers produced energy

by the engine to the red shaft

the synchromesh is already engaged

therefore that dented wheel fixed to the shaft

The dented wheel of the third gear

is freely spining

just like in a manual transmission

the shaft transfers the energy to the output wheel

which engages the two or four wheel of the vehicle

Also, the output wheel engages the dented wheels

of the second transmission

For the second gear

we have to note

that the synchromesh is already in its right position

Therefore, when the computer wants to switch to second gear

the system disengages the red clutch and

engages the blue one

This way, the energy is transmitted by superior shaft

to the output wheel

Simultaneously, the thrid gear

is pre-selected

by the displacement of the synchromesh

This way when the computer wants to change to third gear

the system disconnects the clutch

and connect the other to the output wheel

This is the case for the fourth gear

Motorcars and cars

with a double gear box

use a command system to change gears.

These gear changes depend

on the driving style of the driver

and the speed of the vehicule