Avantium acquires Liquid Light; electrocatalysis to convert CO2 to chemicals
Volkswagen AG agrees to plead guilty and pay $4.3B in criminal and civil penalties; 6 execs and employees indicted

New Opel Insignia to offer torque-vectoring all-wheel drive with Twinster system

The all-new Opel Insignia Grand Sport, arriving in the market early this year, will be available with a torque vectoring all-wheel drive system. The new Opel Insignia uses a GKN Twinster all-wheel drive system with a rear drive module that uses a twin clutch system without differential. The two clutches distribute torque between the front and rear axle and between the two rear wheels.

Torque vectoring provides intelligent control of the vehicle dynamics by sending precise amounts of torque to individual wheels; by over-speeding the outside wheel in a corner, torque vectoring can induce a yaw-moment, helping steer the vehicle. Conventional torque vectoring systems use a set of planetary gears either side of the differential to achieve only very low levels of over-speeding. Other systems use braking to achieve a similar effect—but waste energy and slow the vehicle in the process.

The Insignia’s all-wheel drive system can apply torque to one or both of the rear wheels independently, enabling torque vectoring capability across the car’s full performance range. The system reacts to the driving environment and driver intention by automatically modulating the clutches when torque is required on one or both sides.

Cq5dam.web.1280.1280
The new Opel Insignia utilizes a GKN Twinster all-wheel drive system with a rear drive module that uses a twin clutch system without differential. Click to enlarge.

When cornering, higher torque is sent to the outside rear wheel, inducing rotation around the vertical axis (yaw)—the Insignia turns in with more precision, responding more spontaneously to inputs from the driver.

Torque vectoring also contributes to safety by controlling the distribution of torque according to changes in throttle position, steering angle and road surface, thus damping the amount of yaw. This intelligent use of torque distribution—also known as “yaw damping”—results in neutral vehicle behaviour, making the car more stable and steerable for the driver.

New Insignia drivers can choose the amount of yaw damping to suit their driving style by selecting the appropriate driving mode: from high yaw damping in “Tour” to low in “Sport”, for sportier vehicle behavior.

Twinster can also make all-wheel drive more fuel-efficient. The clutches on the rear drive unit not only transfer torque; they also can disconnect it.

Twinster was first introduced and proven on the Range Rover Evoque. GKN is now also working on Twinster applications for vehicles with eDrive and rear-wheel drive.

Comments

Alex_C

It's said: "Other systems use braking to achieve a similar effect—but waste energy and slow the vehicle in the process."
What the GKN system of clutches does if not brake one half shaft to send more torque to another half shaft, using controlled clutch slip.
Clutches wear as well.
So is it cheaper to replace brake pads, or clutches inside GKN Twinster system?
Probably GKN system offers finer control, but is it worth the price?

SJC

Just put two motors on the back.

Bernard

The obvious advantage of this system is that it's a lot cheaper to produce. Clutches require much less precision machine work than differentials.

It won't last as long, but that's just acknowledging the fact that cars don't need all-wheel-drive. It looks good on the brochure, but it's almost completely unnecessary.

Let's hope that Opel has done the right thing and programmed this system to disconnect the rear axle at all times. They can turn it on for the first few meters on icy roads, but other than that it's just dead weight.

SJC

Two motors mounted where the differential would be driving each rear wheel makes more sense. Steer with the front, drive and torque vector with the rear...simple.

gorr

This is one of the best video that prove that my car is not causing climate change, millions of peoples will save money from the climate change scammers.

https://www.youtube.com/watch?v=rI-KCN4p0Cw&t=495s

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Your Information

(Name is required. Email address will not be displayed with the comment.)