nissan

Figure: GTR R35 (113KB)

Source

Torque-Vectoring system. Data provided by different sensors (which monitor wheel speed, steering angle,throttle position, yaw rate) are analized by the 4WD controller, which is able to understand how to split the torque between four wheels.

There isn't a central differential, torque is sent to the rear axle using a shaft linked to front differential. The rear differential is replaced by two clutches which (if necessary) split the torque sent to the rear axle between the two wheels.

Torque-Vectoring system automatically adds torque to the outside rear wheel in corners to make the car turn quicker.

Figure: 2010 nissan juke det fe 8231215 600 (77KB)

Nissan All-Mode 4x4 system - very similar to Xtrail.

Normally AUTO mode what can be switched to Locked mode. During Auto mode front wheel drive vehicle where rear axle engages when front wheels start to slip, power is variably distributed from 100:0 to 50:50 front to rear.

In LOCK mode the transfer clutch is permanently locked - power distribution 50:50. If vehicle speed increases, the vehicle automatically goes to AUTO mode, then, when speed decreases, it switches back to LOCK. When transfer clutch oil is overheated, the vehicle goes into 2WD mode.

Has electric clutch to connect rear axle. Single wheel spinning on axles is controlled via wheel brakes - known as electronic limited slip differential.

Figure: Murano rear axle (59KB)

Same as X-Trail I

The Mk 1 has a multi-plate clutch that can send up to 50% torque to the rear axle and may be activated at any time. Features a "central differential lock", meaning 50% of torque is permanently sent to the rear axle (actually up to 40km/h, provided the oil in the multiplate clutch is not overheated in which case it switches back to 2WD mode).

The 4WD system also features a ELD - electronic limited slip differential on both front and rear axles. It does not actual lock anything, but uses brakes on free spinning wheels to emulate a limited slip differential. Works OK in snow and mud, but can not be compared to true lockers.

On the subject of true LSDs and lockers, the Qashqai can not be equipped with any aftermaket front or rear differentials, at least not officially, although it must be said the Dacia Duster features the same drive train as the Qashqai, and can be equipped with true LSDs and aftermarket torsen differentials.

WD21 Pathfinders were available in both 2WD and manually engaged 4WD (Part-time all wheel drive) configurations. LSD rear - optional, 2,02:1 low gear.

Part-time all wheel drive. LSD rear - optional, 2,02:1 low gear.

All Mode selectable all wheel drive system - normally rear wheel drive, in AUTO mode front axle engages when rear wheels start to slip, power is variably distributed from 0:100 to 50:50 front to rear. In AUTO mode the system works as an automatic all wheel drive system. In 2WD mode, the clutch is unlocked permanently. In 4H mode the tranfer clutch is permanently locked - power distribution 50:50.

Figure: All Mode all wheel drive system modes and scheme. (61KB)

Seems to be like an X-Trail normally front wheel drive vehicle(?).

Pathfinder Hybrid available in 2-wheel drive and 4-wheel drive configurations, uses a gasoline engine and an electric motor paired to a compact lithium-ion battery. The Pathfinder Hybrid also have hybrid emblems and hybrid LED taillights versus the non-hybrid model. The hybrid system uses a Nissan Intelligent Dual Clutch System (one motor / two clutch parallel system) that manages power from both the electric motor and the gas engine. The 15 kW (20 hp) electric motor and gas engine work in tandem to provide performance similar to the non-hybrid Pathfinder's 3.5-liter gasoline V6.

Part-time all wheel drive. LSD rear - standard, Locking differential - optional. 2,02:1 low gear.

Figure: Nissan Patrol GR transfer case (115KB)

Mechanical rear wheel drive with a clutch to transfer power to the front differential. Torque-vectoring rear differential.

"The clever electronic control system is fed by all the information ... such as G-force, boost pressure, throttle position etc, in addition, the speed of individual wheels measured by ABS wheel speed sensors. By these information, the computer knows whether the car is running out of cornering limit or not. If not yet, the multi-plate clutches won't intervene, thus the car can power slide through the corner smoothly. In case out of limit, the multi-plate clutch will engage and send torque to front wheels, increasing traction."

http://www.autozine.org/technical_school/traction/tech_traction_4wd_21.htm#Skyline

All Mode selectable all wheel drive system - normally front wheel drive vehicle, in AUTO mode rear axle engages when front wheels start to slip, power is variably distributed from 100:0 to 50:50 front to rear. In AUTO mode the system works as an automatic all wheel drive system.

In 2WD mode, the clutch is unlocked permanently. However, even when in 2WD mode, rear wheels can sometimes be engaged by electronic control unit, for example under heavy acceleration.

In LOCK mode the tranfer clutch is permanently locked - power distribution 50:50. If vehicle speed increases, the vehicle automatically goes to AUTO mode, then, when speed decreases, it switches back to LOCK. When transfer clutch oil is overheated, the vehicle goes into 2WD mode.

Figure: Nissan X-Trail All Mode 4wd system description (134KB)

Figure: nissan x trail (121KB)

Figure: nissan x trail (196KB)

Figure: nissan qashqai xtrail 4wd clutch (34KB)

Figure: nissan qashqai xtrail rear differential (97KB)

Figure: nissan qashqai xtrail rear differential (124KB)

Figure: nissan x trail t31 coupling tension graph (6KB)

Figure: nissan qashqai i owners manual (150KB)

Figure: nissan qashqai i owners manual (147KB)

Figure: nissan qashqai i rear differential (39KB)

Figure: nissan qashqai i system diagram (66KB)

Nissan Qashqai/Xtrail service manual (.pdf 172KB)

Part-time all wheel drive.

Part-time all wheel drive. Rear diff lock in Pro-X4 models.