BPW ECO Tronic EBS - 5.2.4 COLAS+

72
Applications
The „COLAS
®
+“ raising/lowering valve has a broad range of
functions. The following features are integrated: deadman
function, RoRo position and “Reset to Ride“ (RtR) function.
Mode of Operation
“Drive“ position
The lever is in the central position when pulled out and is secured
by an anti-rotational lock.
In this position connection 11 is coupled to connection 21 and
connection 12 to 22, enabling a direct air connection between
the air suspension valve and the air bags.
“Stop“ position
The lever is in the central position when pressed in. Connection
11 is not coupled to connection 21 and connection 12 is not
coupled to connection 22
“Lower“ position
The lever is rotated clockwise from the „Stop“ position approx.
35 degrees, so that connections 21 and 22 is connected to
connection 3, enabling venting of the air bags.
After releasing the lever, it automatically rotates back to the
central „Stop“ position and de-couples connection 21 and 22
from connection 3 (so called“dead man switch“). The air bags
are then no longer vented.
“RoRo“ (“Lowered locked“) position
The lever is rotated clockwise from the „Stop“ position, approx.
35 degrees and pressed into this position. This de-activates the
dead man function and the lever remains fi xed in the rotated
position after it is released. Connections 21, 22 and 3 remain
coupled to each other. The air bags are continuously vented.
This venting is, for example, required with ferry or rail loading
of the vehicle.
“Raise“ position
The lever is rotated counter clockwise from the “Stop” position
approx. 35 degrees so that connection 21 and 22 are coupled
to connection 1, enabling the charging of the air bags.
After releasing the lever, it automatically rotates back to the
central “Stop” position and de-couples connections 21 and 22
from connection 1 (so called “dead man switch”).
Resetting of “Stop“ or “Lower Locked“ position to “Travel“
position
Resetting from the central position is performed manually by
pulling out the lever, so that the anti-rotational lock is again
activated.
For vehicle speeds in excess of 15 km/h (adjustable) the solenoid
valve is pulsed from the ABS/EBS, automatically pressing the
lever to the “Travel” position. This function prevents driving with
vented air bags and thus damage being done to the running gear.
Fig. 128
Caution Danger!
During the raising and/or lowering process, no
persons may be present in the hazardous zone.
A lowered body can automatically lift during
start-up, „Reset to Ride“.
Piping diagram
22
21
3
12
11
1
Drive
Raise
Stop
Lower
LowerLocked
COLAS
®
+
Fig. 127
5 Installation and Operating Instructions
5.2.4 COLAS
®
+
5.2 Air suspension