EnI
Piston Pioneer
BMW has developed two new drive and chassis systems which increase agility, traction and active safety without compromising dynamic driving and efficiency: Dynamic Performance Control and a new function of Dynamic Stability Control, called Selective Control Intervention.
Dynamic Performance Control
Dynamic Performance Control is based on a mechatronic system that takes over variable distribution of drive torque to the rear wheels independently of engine power. The difference in torque can be as much as 1800Nm and this enhances handling, steering precision, directional stability and traction. At the same time, the steering responds more directly, needing fewer steering corrections and stabilising interventions from the electronic control systems, such as Dynamic Stability Control (DSC).
The rear axle differential is combined with two superimposed differential drives and two electronically controlled lamella brakes in order to continuously vary the distribution of the drive torque between the rear wheels.
BMW has developed a system that operates under load and, for the first time, also actively distributes torque during thrust operation and when the clutch is engaged.
The combination of Dynamic Performance Control and the variable four-wheel drive BMW xDrive allows longitudinal torque to be variably distributed between the front and rear axle. Also, it distributes drive torque to the rear axle in response to driving conditions, and neutralises the inherent tendency of four-wheel vehicles to understeer.
Selective Control Intervention
The xDrive four-wheel drive system, DSC electronic control system and engine control through integrated chassis management are combined for fast distribution of the drive torque in the longitudinal direction.
Meanwhile, further development of Dynamic Stability Control (DSC) has seen the introduction of Selective Control Intervention. During tight cornering it actively counteracts the tendency to understeer. This control intervention, which is also active when DSC is switched off, will initially be introduced from March 2007 in the four-wheel drive models of the new BMW 5-Series. Other models and model series from the BMW brand will follow.
If a vehicle tends to understeer when cornering, the current DSC system increases the braking pressure on the nearside rear wheel in order to generate a stabilising yaw moment. That action remains identical on the new system, but now engine torque can now increased independently of the position of the accelerator. This can generate an additional stabilising torque of up to 500Nm.
The torque compensation when the engine is running at partial load contributes to increasing the precision of the steering manoeuvres, tracking stability and traction when cornering. This is because the system enables the car to respond faster to the course determined by the driver, and steering corrections are less frequently required. The vehicle follows the path of the curve at constant speed despite the stabilising braking intervention.
Source: BMW AG
More info about DPC: BMW Dynamic Peformance Control in Detail
Dynamic Performance Control
Dynamic Performance Control is based on a mechatronic system that takes over variable distribution of drive torque to the rear wheels independently of engine power. The difference in torque can be as much as 1800Nm and this enhances handling, steering precision, directional stability and traction. At the same time, the steering responds more directly, needing fewer steering corrections and stabilising interventions from the electronic control systems, such as Dynamic Stability Control (DSC).
The rear axle differential is combined with two superimposed differential drives and two electronically controlled lamella brakes in order to continuously vary the distribution of the drive torque between the rear wheels.
BMW has developed a system that operates under load and, for the first time, also actively distributes torque during thrust operation and when the clutch is engaged.
The combination of Dynamic Performance Control and the variable four-wheel drive BMW xDrive allows longitudinal torque to be variably distributed between the front and rear axle. Also, it distributes drive torque to the rear axle in response to driving conditions, and neutralises the inherent tendency of four-wheel vehicles to understeer.
Selective Control Intervention
The xDrive four-wheel drive system, DSC electronic control system and engine control through integrated chassis management are combined for fast distribution of the drive torque in the longitudinal direction.
Meanwhile, further development of Dynamic Stability Control (DSC) has seen the introduction of Selective Control Intervention. During tight cornering it actively counteracts the tendency to understeer. This control intervention, which is also active when DSC is switched off, will initially be introduced from March 2007 in the four-wheel drive models of the new BMW 5-Series. Other models and model series from the BMW brand will follow.
If a vehicle tends to understeer when cornering, the current DSC system increases the braking pressure on the nearside rear wheel in order to generate a stabilising yaw moment. That action remains identical on the new system, but now engine torque can now increased independently of the position of the accelerator. This can generate an additional stabilising torque of up to 500Nm.
The torque compensation when the engine is running at partial load contributes to increasing the precision of the steering manoeuvres, tracking stability and traction when cornering. This is because the system enables the car to respond faster to the course determined by the driver, and steering corrections are less frequently required. The vehicle follows the path of the curve at constant speed despite the stabilising braking intervention.
Source: BMW AG
More info about DPC: BMW Dynamic Peformance Control in Detail
This systems sounds really good...but I wonder how good it's going to be against the more rear-biased QUATTRO
