I-Shift Dual Clutch is Volvo Trucks new power-shift gearbox. It has two input shafts, where one is placed inside the other, and two clutches. With these dual input shafts, two gears can be engaged in the gearbox at the same time. Which of those gears that is active is determined by which clutch that is engaged.

HOW IT WORKS: I-SHIFT DUAL CLUTCH

The input shaft to the right is placed inside the left

INPUT SHAFTSDUAL CLUTCH

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.

1234567 At the actual gear change, the previously

engaged clutch is disengaged at the same time as the idling clutch is engaged. All without any loss of torque.

1234567

I-Shift Dual C

lutch is Volvo Trucks new pow

er-shift gearbox. It has tw

o input shafts, where one is placed inside the other, and

two clutches. W

ith these dual input shafts, two gears can be

engaged in the gearbox at the same tim

e. Which of those gears

that is active is determined by w

hich clutch that is engaged.

HO

W IT W

OR

KS

: I-S

HIFT D

UA

L CLU

TCH

When driving, the first gear is engaged by one

of the input shafts. At the same tim

e, the other input shaft pre-selects the next gear.

1234567At the actual gear change, the previously engaged clutch is disengaged at the sam

e tim

e as the idling clutch is engaged. All w

ithout any loss of torque.

1234567

The input shaft to the right is placed inside the left

INPU

T SHAFTS

DUAL C

LUTC

H

0 50 100 150 200 250 300 350 400 450 500

I-Shift Dual Clutch changes gear without any interruption in power delivery, so torque is maintained and the truck loses no speed during gear changes. The green line shows power-shift gear changing with I-Shift Dual Clutch.

The grey line shows gear changing with a conventional gearbox.

Green line – power-shifting with I-Shift Dual ClutchGrey line – gear changing with a conventional gearbox

Driving distance

Engi

ne to

rque

HOW IT WORKS: I-SHIFT DUAL CLUTCH

050

100150

200250

300350

400450

500

I-Shift Dual C

lutch changes gear without any interruption in

power delivery, so torque is m

aintained and the truck loses no speed during gear changes. The green line show

s power-shift

gear changing with I-Shift D

ual Clutch. The grey line show

s gear changing w

ith a conventional gearbox.

HO

W IT W

OR

KS

: I-SH

IFT DU

AL C

LUTC

H

Green line – pow

er-shifting with I-Shift D

ual Clutch

Grey line – gear changing w

ith a conventional gearbox

Driving distance

Engine torque