Rüsselsheim. The Opel Insignia is breathing new life into the mid-size segment with its breathtaking design and leading technology. The Car of the Year 2009 features innovations such as Opel’s new Adaptive 4x4 system which have previously only been available in much more expensive sports cars or luxury sedans. Together with the FlexRide premium chassis and the electronic-hydraulic multi-disk clutch, the Adaptive 4x4 system sets new standards for reaction time of the controls in the Insignia. When the sensors detect a critical situation, it only takes around 80 milliseconds – or the blink of an eye – for the system to send the required power distribution to the wheels. The power can be distributed seamlessly from zero to 100 percent between the front and rear axle or between the rear wheels. In contrast to conventional mechanical all-wheel drives, the hydraulic controls enable lightning-quick intervention.
Already about five percent of the 177,000 Insignia’s ordered in Europe are equipped with all-wheel drive. The new Adaptive 4x4 system is available with the 2-liter gasoline turbo and is standard in the 2.8 V6 Turbo and OPC models. In Germany, prices begin at 35,685 euros for the 162 kW/220 hp Opel Insignia 2.0 turbo Edition.
All-wheel drive electronics designed as early-warning system
The adaptive all-wheel drive system receives information from three modules: BCM (Body Control Module), ECU (Engine Control Unit) and the ESP module. This information is sent to the control module, analyzed and then torque is distributed individually to the wheels. The Insignia 4x4’s power distribution travels from the front axle differential over the cardan shaft to a hydraulic Haldex multi-disk clutch, which electronically distributes the torque from zero to 100 percent between the front and rear axle. At rear axle, power distribution is also controlled by a hydraulic multi-disk clutch, where nearly 100 percent to power can be transferred to one of the rear wheels if required. This gives drivers the confidence that their Insignia 4x4 can still maintain safe traction even if three wheels are on ice and only one of the rear wheels can find grip.
The modules receive their signals from sensors that capture yaw rate, acceleration, steering angle, wheel speed, gas pedal position, engine speed and torque, and adapt power distribution to the driving situation based on this information. Even before take-off, the control module receives information on gas pedal position and engine speed and is able to transfer torque between the front and rear axle to prevent the car losing traction. This means before a racing start, a proportionate amount of propulsion power is already sent to the rear wheels. Andreas Holl, head of Insignia chassis development, says, “A big advantage of the new Opel all-wheel drive system is that a critical situation such as spinning front wheels doesn’t have to occur before the proper corrective measures are introduced.”
Bad roads, rain and snow call for stability and control
Particularly in hazardous weather conditions like heavy rain, snow and sleet, poor quality roads with potholes put extreme demands on chassis technology. Advanced chassis systems are designed to recognize and avoid dangers as early as possible, as well as support the driver in critical driving situations. As a consequence, driving the Opel Insignia 4x4 is delightful, even more so when the wintery driving conditions are appalling.
An example of this is driving in snow. Many drivers have experienced the feeling of picking up a too much downhill speed, taking their foot off the gas pedal and realizing that their vehicle is struggling to follow the steering direction. The Insignia’s adaptive 4x4 system also comes to drivers’ aid in these types of dangerous situations. With its complex sensor system, the all-wheel drive technology can not only distribute torque but also redirect it to individual wheels in the case of braking on the engine (drag torque) as a result of releasing the accelerator thereby increasing the steer ability and their control of the vehicle.
Thanks to the many control options available such as torque and braking torque distribution as well as FlexRide damper control, the adaptive all-wheel drive system handles many critical driving situations without the need for ESP to intervene. ESP stays in the background as a guardian angel.
Automatic fuel-saving mode and sport mode at the push of a button
The Opel Insignia Adaptive 4x4 system is not only useful in critical safety situations – it also detects when there are no external conditions that require special intervention, such as travelling on a highway. In this situation the system switches off the rear-wheel drive system and reverts to front wheel drive to reduce friction losses and save fuel.
The driver can also steer power distribution at the push of a button. By choosing the sport mode, more power is sent to the rear axle to increase traction and achieve a more agile driving performance. This makes it easier for sporty drivers to maintain complete and active control even as the driving safety limits are pushed out a bit further. The Adaptive 4x4 system stabilizes up to the tires’ grip limit, at which point ESP intervenes if necessary.
Already about five percent of the 177,000 Insignia’s ordered in Europe are equipped with all-wheel drive. The new Adaptive 4x4 system is available with the 2-liter gasoline turbo and is standard in the 2.8 V6 Turbo and OPC models. In Germany, prices begin at 35,685 euros for the 162 kW/220 hp Opel Insignia 2.0 turbo Edition.
All-wheel drive electronics designed as early-warning system
The adaptive all-wheel drive system receives information from three modules: BCM (Body Control Module), ECU (Engine Control Unit) and the ESP module. This information is sent to the control module, analyzed and then torque is distributed individually to the wheels. The Insignia 4x4’s power distribution travels from the front axle differential over the cardan shaft to a hydraulic Haldex multi-disk clutch, which electronically distributes the torque from zero to 100 percent between the front and rear axle. At rear axle, power distribution is also controlled by a hydraulic multi-disk clutch, where nearly 100 percent to power can be transferred to one of the rear wheels if required. This gives drivers the confidence that their Insignia 4x4 can still maintain safe traction even if three wheels are on ice and only one of the rear wheels can find grip.
The modules receive their signals from sensors that capture yaw rate, acceleration, steering angle, wheel speed, gas pedal position, engine speed and torque, and adapt power distribution to the driving situation based on this information. Even before take-off, the control module receives information on gas pedal position and engine speed and is able to transfer torque between the front and rear axle to prevent the car losing traction. This means before a racing start, a proportionate amount of propulsion power is already sent to the rear wheels. Andreas Holl, head of Insignia chassis development, says, “A big advantage of the new Opel all-wheel drive system is that a critical situation such as spinning front wheels doesn’t have to occur before the proper corrective measures are introduced.”
Bad roads, rain and snow call for stability and control
Particularly in hazardous weather conditions like heavy rain, snow and sleet, poor quality roads with potholes put extreme demands on chassis technology. Advanced chassis systems are designed to recognize and avoid dangers as early as possible, as well as support the driver in critical driving situations. As a consequence, driving the Opel Insignia 4x4 is delightful, even more so when the wintery driving conditions are appalling.
An example of this is driving in snow. Many drivers have experienced the feeling of picking up a too much downhill speed, taking their foot off the gas pedal and realizing that their vehicle is struggling to follow the steering direction. The Insignia’s adaptive 4x4 system also comes to drivers’ aid in these types of dangerous situations. With its complex sensor system, the all-wheel drive technology can not only distribute torque but also redirect it to individual wheels in the case of braking on the engine (drag torque) as a result of releasing the accelerator thereby increasing the steer ability and their control of the vehicle.
Thanks to the many control options available such as torque and braking torque distribution as well as FlexRide damper control, the adaptive all-wheel drive system handles many critical driving situations without the need for ESP to intervene. ESP stays in the background as a guardian angel.
Automatic fuel-saving mode and sport mode at the push of a button
The Opel Insignia Adaptive 4x4 system is not only useful in critical safety situations – it also detects when there are no external conditions that require special intervention, such as travelling on a highway. In this situation the system switches off the rear-wheel drive system and reverts to front wheel drive to reduce friction losses and save fuel.
The driver can also steer power distribution at the push of a button. By choosing the sport mode, more power is sent to the rear axle to increase traction and achieve a more agile driving performance. This makes it easier for sporty drivers to maintain complete and active control even as the driving safety limits are pushed out a bit further. The Adaptive 4x4 system stabilizes up to the tires’ grip limit, at which point ESP intervenes if necessary.
Source: GM Media
