Tech Product

One minute – I-Shift Dual Clutch

2016-10-10

Volvo Trucks’ I-Shift Dual Clutch enables seamless gear changes, using sports car technology that is totally unique in the heavy trucks market. When conditions demand a lot of shifting, this gearbox really comes into its own. In fact, the heavier the transport and the tougher the conditions, the more you will gain.

How it works: I-Shift Dual Clutch

The seamless gear change with the I-Shift Dual Clutch is made possible by the gearbox’s two clutches and input shafts.

I-Shift Dual Clutch has two input shafts, where one is placed inside the other, and two clutches. With these dual input shafts, two gears can be engaged at the same time. The active gear is determined by which of the two clutches is engaged.

When driving, the first gear is engaged by one of the input shafts. At the same time, the other input shaft pre-selects the next gear.

During the actual gear change, the idling clutch is engaged at the same time as the previous clutch is disengaged – all without any loss of torque.

Engine torque power comparison

I-Shift Dual Clutch changes gear without any loss of power. Since torque is kept constant, the truck does not lose any speed when the actual gear change takes place.

Green line – torque level with I-Shift Dual Clutch.
Grey line – torque level with an ordinary gearbox.