What does an air suspension solenoid valve block do?

Valve-block-for-air-compressor-Audi Q7

Air suspension uses valves or valve blocks to control the air flow in a circuit or receiver. Air spring suspension solenoid valve blocks are responsible for distributing air from the compressor to air suspension struts or air springs. Over time its O-rings can dry rot, causing damage to the compressor via air leaks and overworking, along with moisture damage to the electrical solenoid components.

Solenoid Valve Block for BMW 7 G11 G12 Air Spring Compressor

1. It is possible to operate “directly” using the button, provided that the consumed current of the valve solenoid is small and the contact group of the button will withstand these currents.

air suspension solenoid valve block

2. It can be controlled through a relay when the conditions do not correspond to those described above, and the wire cross-section is inconvenient in the text. on the type of control (by minus or plus).
3. Control through a field-effect transistor. It is controlled by “minus”.
4. PWM control. Gas equipment, where the switching speed is very important, which is achieved by a low-resistance solenoid winding (0.3 – 0.5 Ohm), and therefore currents increase.

The resistances of the valve solenoid windings are found in the range of 15-22 ohms, sometimes in high-pressure systems (possibly a receiver circuit), it drops to 7 ohms.
As a result, the first 3 points are the most acceptable.

Air Suspension Air Strut Compressor Pump for Mercedes

The valve block bleeding air created an additional need to turn on the compressor pump.
The compressor was turned on often, and this became even more noticeable after replacing the pneumatic line control unit with an Olroud one, which allows you to significantly increase the clearance.
And all because to understand the most what’s what in the diagnosis of pneuma.
After the replacement machine levels out much faster, the compressor turns on less frequently.