Driveline

VP Vehicle Controller driveline

The Driveline helper builds the vehicle's driveline connecting a number of differentials and/or torque splitters based on the number of drive wheels and the specified configuration.

Each differential or torque splitter in the driveline can be configured independently:

Axle Differential or Differential alone.
The standard differential that connects the two wheels in the same axle.
Center Differential
A differential connecting the front and rear "regions" in the driveline. These differentials may connect axle differentials or inter-axle differentials.
Inter-axle differential
A differential connecting two axles in the same front or rear region.
Torque splitter

A viscous coupling between two axles. The torque is applied to the first axle, but if the wheels in that axle slip then part of the torque is routed to the second axle.

A typical AWD car with a torque splitter would work as this: front wheels are powered, but if these wheels slip, the rear wheels receive a portion of the torque. This is similar to the Haldex coupling in the Audi Quattro.

Single driven axle

A single driven axle with a differential connecting both wheels.

Two driven axles

Center differential
A center differential connecting the two axle differentials.
Torque splitter
Drive power goes to the first axle. A torque splitter routes part of the power to the second axle.
H-Drive
Wheels on each side of both axles are linked together. A single center differential connects both sides.

Three driven axles

H-Drive and center differential
Second and third axles are side-linked to a single differential. Drive power goes to a center differential connecting the side-linked axles and the first axle.
H-Drive and torque splitter at linked axles
Second and third axles are side-linked to a single differential. Drive power goes to the second-third linked axles. A torque splitter routes part of the power to the first axle.
H-Drive and torque splitter at independent axle
Second and third axles are side-linked to a single differential. Drive power goes to the first axle. A torque splitter routes part of the power to the second-third linked axles.

Four driven axles

Dual inter-axle differentials and center differential
First and second axles are connected with a inter-axle differential. Third and fourth axles are connected with another inter-axle differential. Inter-axle differentials are connected together with a center differential.
Dual inter-axle differentials and torque splitter
First and second axles are connected with a inter-axle differential. Third and fourth axles are connected with another inter-axle differential. Drive power goes to the 1-2 inter-axle differential. A torque splitter routes part of the power to the 3-4 inter-axle differential.
Dual H-Drive and center differential
First-second and third-fourth axles are side-linked to a single differential each pair. Both differentials are connected together with a center differential.
Dual H-Drive and torque splitter
First-second and third-fourth axles are side-linked to a single differential each pair. Drive torque goest to the first-second axles. A torque splitter routes part of the power to the third-fourth axles.
Full H-Drive
Wheels on each side of all axles are linked together. A single center differential connects both sides.