Delphi's Unified Chassis Control Optimizes Vehicle Safety, Comfort & Performance
(EMAILWIRE.COM, March 01, 2002 ) The automotive industry is in continual pursuit to answer the question "what's next?" Delphi has the answer for advanced chassis control systems with Unified Chassis Control (UCC). Vehicles traditionally contain steering, braking and suspension systems that act independently. Each of these systems is tuned to match the desired performance and brand character of the vehicle. In order to achieve overall balance, performance trade-offs are required in steering, braking and damping. Delphi's UCC strategy can ultimately make this approach obsolete.
UCC integrates two or more electronically controlled chassis systems for enhanced vehicle safety, performance and control. UCC is the next leap ahead due to the ability to intelligently integrate chassis systems to eliminate trade-offs, simplify chassis system tuning and greatly enhance overall chassis performance versus traditionally tuned, independently controlled systems. The result is enhanced safety, improved vehicle performance and improved ride comfort and control.
Delphi's UCC strategy builds upon the current and anticipated future innovations in the areas of:
controlled braking: including antilock braking, traction control, vehicle stability control and brake-by-wire;
controlled steering: including electric power steering, electric rear-wheel (four-wheel) steering and steer-by-wire;
controlled suspension: including controlled variable damping and dynamic body control.
New system performance and tuning flexibility is achieved through the UCC control strategy. The strategy is comprised of electronics and sophisticated algorithms that functionally integrate these once-independent subsystems to increase stability and control.
This approach utilizes shared sensor data and a flexible architecture to provide seamless connection between the steering, braking and suspension subsystems. This control and architecture strategy ensures optimized coordination, communication management and diagnostics of the subsystems.
UCC benefits include safety, comfort and performance features.
Safety benefits
UCC integration can dramatically expand the domain of a conventional brake-based vehicle stability control system through early intervention with steering, often before the driver senses there is a potentially hazardous situation.
UCC reduces driver effort and helps maintain control in emergency situations such as evasive maneuvers on low-friction, split-coefficient surfaces such as two wheels on dry pavement and two on ice, or during excessive steering or high-speed turns.
UCC can substantially lower the propensity for vehicles to roll over, especially on high center of gravity vehicles. Loss of directional control accounts for 50 to 80 percent of vehicle rollovers.
UCC can reduce stopping distances by as much as 20 percent on split-or-mixed road surfaces while maintaining vehicle stability control.
Improved driver comfort and vehicle performance benefits
Dramatic improvements in vehicle ride including improved body control and reduced head toss can be achieved while allowing the driver to make crisper turns and quicker responses.
UCC minimizes the ride and handling compromise between off-road and highway performance for high center of gravity vehicles such as full-size trucks and sport utility vehicles.
UCC reduces stress, fatigue and driver effort exerted to control the vehicle in inclement weather.
Vehicle manufacturer benefits include:
UCC coordinates vehicle character and feel, helping to support vehicle brand characteristics and adding a new dimension of vehicle tuning flexibility for the automaker. Chassis system tuning can be completed in a fraction of the time by utilizing programming techniques that offer versatility and immediate feedback.
UCC can simplify the integration of electronically controlled subsystems to allow OEMs to integrate more than one brand of controlled chassis subsystems to expedite the development process, speed time to market and reduce program costs.
UCC enlarges the handling and ride capability envelope of a vehicle eliminating the traditional performance trade-offs thereby helping to strengthen vehicle brand attributes.
Delphi's first production application of UCC is found on the 2002 Cadillac Seville and DeVille. These vehicles contain Delphi's TraXXar™ vehicle stability control (controlled braking) and continuously variable real time damping (CVRTD), or controlled suspension. By integrating braking and damping, these vehicles are able to maintain their luxury comfort with the added ability to instantaneously transform the ride authority to sports car-like handling.
In addition, the UCC approach enables the CVRTD dampers and controlled brakes to coordinate during a TraXXar™ stability event to reduce body motion or dipping caused by the independent application of the wheel brakes. The result: better control and ride comfort; and a more seamless transition between regular and emergency driving that is consistent with the brand character of the car.
In the future, Delphi will offer a UCC system that integrates controlled rear steering (QUADRASTEER™ four-wheel steering) and controlled braking (TraXXar™). Presently, vehicle stability control systems are designed to react only during emergency driving situations, applying the brakes to help maintain control. These systems can be obtrusive and result in increased body motion and slowing of the vehicle.
Future Delphi UCC applications that combine controlled rear steering and controlled braking can intervene at a much lower threshold to correct vehicle instability. For example, as the system begins to detect slight amounts of vehicle instability, it will activate an appropriate rear-wheel steering motion to correct the situation. Unlike brake-only systems, the correction can take place before most drivers even become aware of instability.
In addition, if the situation requires, the system can also apply the appropriate corner brakes in a coordinated effort (using brakes and steering) to maintain control. During ABS braking, coordinating the brakes to slow down the vehicle and steering to maintain directional control can reduce stopping distance by up to 20 percent in certain conditions.
Delphi is also developing other future Unified Chassis Control systems that utilize innovative combinations of other chassis technologies including Dynamic Body Control, Magneride™ variable dampers, E-STEER™ electric power steering and eventually brake-by-wire and steer-by-wire.
Delphi Automotive Systems is positioned with the most comprehensive portfolio of controlled steering, braking and suspension products in the industry, complete with in-house research and development, product engineering and manufacturing expertise.
Delphi's established presence in controlled chassis products includes controlled braking systems such as TraXXar™. Delphi's controlled steering products in production today include QUADRASTEER™ Four-Wheel Steering and E-STEER™ Electric Power Steering. Controlled suspension expertise includes MagneRide™ MR fluid-based variable dampers and Dynamic Body Control.
For additional information visit www.delphiauto.com/vpr.
---------------
Produced for Delphi Automotive Systems
Contact:
Sara Brogan, 248-813-2525
Carrie Wright, 989-757-4043
---------------
UCC integrates two or more electronically controlled chassis systems for enhanced vehicle safety, performance and control. UCC is the next leap ahead due to the ability to intelligently integrate chassis systems to eliminate trade-offs, simplify chassis system tuning and greatly enhance overall chassis performance versus traditionally tuned, independently controlled systems. The result is enhanced safety, improved vehicle performance and improved ride comfort and control.
Delphi's UCC strategy builds upon the current and anticipated future innovations in the areas of:
controlled braking: including antilock braking, traction control, vehicle stability control and brake-by-wire;
controlled steering: including electric power steering, electric rear-wheel (four-wheel) steering and steer-by-wire;
controlled suspension: including controlled variable damping and dynamic body control.
New system performance and tuning flexibility is achieved through the UCC control strategy. The strategy is comprised of electronics and sophisticated algorithms that functionally integrate these once-independent subsystems to increase stability and control.
This approach utilizes shared sensor data and a flexible architecture to provide seamless connection between the steering, braking and suspension subsystems. This control and architecture strategy ensures optimized coordination, communication management and diagnostics of the subsystems.
UCC benefits include safety, comfort and performance features.
Safety benefits
UCC integration can dramatically expand the domain of a conventional brake-based vehicle stability control system through early intervention with steering, often before the driver senses there is a potentially hazardous situation.
UCC reduces driver effort and helps maintain control in emergency situations such as evasive maneuvers on low-friction, split-coefficient surfaces such as two wheels on dry pavement and two on ice, or during excessive steering or high-speed turns.
UCC can substantially lower the propensity for vehicles to roll over, especially on high center of gravity vehicles. Loss of directional control accounts for 50 to 80 percent of vehicle rollovers.
UCC can reduce stopping distances by as much as 20 percent on split-or-mixed road surfaces while maintaining vehicle stability control.
Improved driver comfort and vehicle performance benefits
Dramatic improvements in vehicle ride including improved body control and reduced head toss can be achieved while allowing the driver to make crisper turns and quicker responses.
UCC minimizes the ride and handling compromise between off-road and highway performance for high center of gravity vehicles such as full-size trucks and sport utility vehicles.
UCC reduces stress, fatigue and driver effort exerted to control the vehicle in inclement weather.
Vehicle manufacturer benefits include:
UCC coordinates vehicle character and feel, helping to support vehicle brand characteristics and adding a new dimension of vehicle tuning flexibility for the automaker. Chassis system tuning can be completed in a fraction of the time by utilizing programming techniques that offer versatility and immediate feedback.
UCC can simplify the integration of electronically controlled subsystems to allow OEMs to integrate more than one brand of controlled chassis subsystems to expedite the development process, speed time to market and reduce program costs.
UCC enlarges the handling and ride capability envelope of a vehicle eliminating the traditional performance trade-offs thereby helping to strengthen vehicle brand attributes.
Delphi's first production application of UCC is found on the 2002 Cadillac Seville and DeVille. These vehicles contain Delphi's TraXXar™ vehicle stability control (controlled braking) and continuously variable real time damping (CVRTD), or controlled suspension. By integrating braking and damping, these vehicles are able to maintain their luxury comfort with the added ability to instantaneously transform the ride authority to sports car-like handling.
In addition, the UCC approach enables the CVRTD dampers and controlled brakes to coordinate during a TraXXar™ stability event to reduce body motion or dipping caused by the independent application of the wheel brakes. The result: better control and ride comfort; and a more seamless transition between regular and emergency driving that is consistent with the brand character of the car.
In the future, Delphi will offer a UCC system that integrates controlled rear steering (QUADRASTEER™ four-wheel steering) and controlled braking (TraXXar™). Presently, vehicle stability control systems are designed to react only during emergency driving situations, applying the brakes to help maintain control. These systems can be obtrusive and result in increased body motion and slowing of the vehicle.
Future Delphi UCC applications that combine controlled rear steering and controlled braking can intervene at a much lower threshold to correct vehicle instability. For example, as the system begins to detect slight amounts of vehicle instability, it will activate an appropriate rear-wheel steering motion to correct the situation. Unlike brake-only systems, the correction can take place before most drivers even become aware of instability.
In addition, if the situation requires, the system can also apply the appropriate corner brakes in a coordinated effort (using brakes and steering) to maintain control. During ABS braking, coordinating the brakes to slow down the vehicle and steering to maintain directional control can reduce stopping distance by up to 20 percent in certain conditions.
Delphi is also developing other future Unified Chassis Control systems that utilize innovative combinations of other chassis technologies including Dynamic Body Control, Magneride™ variable dampers, E-STEER™ electric power steering and eventually brake-by-wire and steer-by-wire.
Delphi Automotive Systems is positioned with the most comprehensive portfolio of controlled steering, braking and suspension products in the industry, complete with in-house research and development, product engineering and manufacturing expertise.
Delphi's established presence in controlled chassis products includes controlled braking systems such as TraXXar™. Delphi's controlled steering products in production today include QUADRASTEER™ Four-Wheel Steering and E-STEER™ Electric Power Steering. Controlled suspension expertise includes MagneRide™ MR fluid-based variable dampers and Dynamic Body Control.
For additional information visit www.delphiauto.com/vpr.
---------------
Produced for Delphi Automotive Systems
Contact:
Sara Brogan, 248-813-2525
Carrie Wright, 989-757-4043
---------------
Contact Information:
Delphi Automotive Systems
Joseph Nchor
Tel:
Email us
This is a press release. Press release distribution and press release services by EmailWire.Com: http://www.emailwire.com/us-press-release-distribution.php.
Delphi Automotive Systems
Joseph Nchor
Tel:
Email us
This is a press release. Press release distribution and press release services by EmailWire.Com: http://www.emailwire.com/us-press-release-distribution.php.
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