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Ride Control

Delphi Active Stabilizer Bar System

Delphi uses its knowledge of the complete vehicle to offer a full array of advanced vehicle dynamics components and systems technologies. This selection allows vehicle manufacturers to provide their own distinctive ride and handling characteristics, enhancing vehicle performance and customer enthusiasm. With innovations in controlled suspension, braking, front and rear steering, as well as coordinated engine torque management control, Delphi can supply one product or a combination of integrated systems. Advanced vehicle dynamics includes such innovations as collision avoidance, rollover prevention, skid reduction, and reduced turning radius. Delphi’s understanding of these ride and handling functions and others also helps vehicle manufacturers avoid the costly trial and error process. To further satisfy its customers, Delphi’s numerous technical centers and manufacturing sites located from North America to China help provide personalized customer service and the timely delivery of these products.

Description

The Delphi active stabilizer bar system is a chassis-based option that adjusts the stabilizer bar force to help reduce vehicle roll while cornering, allows increased off-road wheel articulation, and improves ride comfort in straight-ahead and cornering conditions. The active, proportional active stabilizer bar system responds in real time to driving conditions based on actual or anticipated body motions. The system contains one or two controlled active stabilizer bar modules, a hydraulic pressure source, a hydraulic manifold with integral valves and pressure sensor, a controller, and vehicle sensors (e.g., steer angle, lateral acceleration, vehicle speed, etc.). The active stabilizer bar system can be integrated with other systems, such as brake systems and steering systems, to further enhance vehicle stability and control.

Features Benefits

4000-6000 Nm maximum
roll moment; 180 bar
capable actuators with
near-zero leakage

High articulation linear
actuator and torsion bar
configuration or a rotary
actuator for improved
packaging, suitable for a
wider range of vehicles

Normally locked failure
mode

Single channel- or two
channel-capable

Linear drop link, triangu-
lated, or rotary actuator

  • Improved driver comfort
    through better isolation,
    reduced head toss, and
    reduced impact harshness
  • Anticipatory control of
    transient driver-induced
    handling maneuvers
  • Precise control of body roll
    angles, up to zero degrees,
    when cornering or in severe
    steering maneuvers
  • Enhanced veicle stability
    and control
  • Extended limits of vehicle
    performance
  • Improved low-speed off-
    road traction with increased
    wheel articulation

Typical Applications

The active stabilizer bar system offers the ability to improve off-road performance for SUVs, while improving vehicle handling, stability, and ride comfort for all vehicles from passenger cars to light-duty trucks.

Performance Advantages

The active stabilizer bar system helps improve vehicle handling and reduces body motion during cornering and severe steering maneuvers, with no adverse effects on normal or rough-road ride performance. It helps provide increased safety and stability during handling maneuvers, and a more comfortable ride—with less head toss—for the driver. The main performance advantage comes from the ability to reduce stabilizer bar forces under normal driving conditions, and road impacts, while applying only the required stabilizer bar forces to maintain up to zero body roll angle in the corners. Another performance advantage of the active stabilizer bar system is improved wheel articulation, which helps significantly increase off-road capability (traction) and driver comfort at very low vehicle speeds on rough terrain.

Operating Conditions:

  • Up to 180 bar operating pressure
  • Controller: vehicle component or underbody
  • Hydraulic and mechanical modules validated in 0.5 m-deep water

Specifications

Parameters Requirements

Type

Single channel
Two axle/single channel
Two axle/two channel
Burst pressure 400 bar
Fail-safe mechanism Normally locked
Mass


Drop link: 1-2 kg per actuator
Triangulated: 15-20 kg per
module
Rotary: 18-26 kg per module
Nominal pump flow rate 4-12 liters/minute
Response time 80 ms to 150 bar

 

 
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