Haldex | Function
SUMS
Electronic Braking Systems
ABS
Brake Components
Actuators
Air Suspension
System Description
Levelling valves
Raise & Lower Valves
Lift Axle Valves
ILAS-EP
Installation
Technical data
Variants
Cables
Documentation
ILAS Pneumatic
Air Disc Brakes
Brake Adjuster
Software
Brake and suspension schematics

Function

ILAS-EP is used for electrically controlling the raising and lowering of one or more lift-axles with conventional air suspension systems. 

On EB+ systems, a load-dependent output signal is used to provide electrical actuation of the ILAS-EP. For standard installations (without EB+), the ILAS-EP can also be controlled by means of a separate special pressure switch which has two adjustable pressure switching points (load dependent).

Lift axle position

Position: lift axle lowered

Solenoid not activated. Connection between port air suspension valve (11) and air bellows of lift axle (21) as well as between the lift bellows (22) and exhaust (3). Connection to air reservoir (1) is closed.

Position: lift axle up 2

Solenoid is activated. Connection between air reservoir (1) and lift bellows (22) as well as between air bellows of lift axle (21) and exhaust (3). Connection to air suspension valve (11) closed.