Direct Shift Gearbox

Introduction:

The DSG is an interesting development as it could be described as a manual gearbox that can change gear automatically. It can be operated by ‘paddles’ behind the steering wheel, by a lever in the centre console or in a fully automatic mode. The gear train and synchronizing components are similar to those of a normal manual change gearbox.

 

DIRECT SHIFT GEARBOX:

 

The DSG is made of two transmission units that are independent of each other. Each transmission unit is constructed in the same way as a manual gearbox and is connected by a multiplate clutch. They are regulated, opened and closed by a mechatronics system. On the system outlined in this section:

 

● first, third, fifth and reverse gears are selected via multiplate clutch 1

● second, fourth and sixth gears are selected via multiplate clutch 2.

 

 

 

                                                                                                                                                                       Direct shift gearbox (DSG)

 

MULTIPLATE TWIN CLUTCH   

• Clutch 1 is the outer clutch and transmits torque into input shaft 1 for first, third, fifth and reverse gears.

• Clutch 2 is the inner clutch and transmits torque into input shaft 2 for second, fourth and sixth gears. Input shaft 2 is shown in relation to the installation position of input shaft 1.

• It is hollow and is joined via splines to multiplate clutch 2. The helical gear wheels for sixth, fourth and second gear can be found on input shaft 2. For sixth, fourth and second gear, a common gear wheel is used. A pulse wheel is used to measure the speed of input shaft 2. The sender is adjacent to the gear wheel for second gear.