Bogie - Volvo ECS Training Tips And Tactics

ECS Gen. 1
Solenoid valve
block - bogie
Trailing axle

bogie

Pusher axle
bogie
There are two variants of the bogie valve block:
- one for trucks with a non-drive axle behind the drive axle,
ʻtrailingʼ (or ʻTagʼ) axle bogie.
- one for trucks with a non-drive axle in front of the drive
axle, ʻpusherʼ axle bogie.
The difference is in the set pressures of the limiting valve
(LV), and the retention valve (RV), which control the
residual pressure in the lifting bellows.
Residual pressure is set between 0.5 and 0.9 bar.
Residual pressure is set between 1.2 and 1.6 bar.
When residual pressure falls to the lower limit, the limiting
valve cuts in and supplies air to the lifting bellows. When
residual pressure reaches the higher limit, the retention
valve opens, and air exhausts via port 3. 67