Meritor WABCO -- Products -- Electronically-Controlled Air Suspensions (ECAS)

Meritor WABCO's electronically controlled air suspension (ECAS) system provides a new level of ride performance for buses, coaches and motor homes. ECAS enhances the vehicle's air suspension by automatically maintaining the vehicle's optimum height and level as road and vehicle characteristics change. In addition to an enhanced ride, ECAS offers ride height control and kneeling functions with rapid response times – for both lowering and raising the suspension.

ECAS benefits include:

Enhanced ride, handling and control
Reduced vibration and wear on the driveline
Ease of entrance and exiting for passenger
Vehicle access to normally inaccessible areas
Reduced air consumption
Level vehicle body, regardless of weight distribution
Improved vehicle adaptability to road environment

System Components

Electronic Control Unit (ECU)

State-of-the-art electronics function as the "brain" of the ECAS
Compact design
Receives driver input from control panel
Controls solenoid valve to ensure proper vehicle height

Solenoid Valve

Modular system requires less pneumatic piping
Reduces leveling response times to seconds
Less hardware and fewer leak points
Minimal space requirements

Height Sensors

Three-sensor system
Maintains level vehicle body under every vehicle load