W07.17-1004-12
1 Blow-off element control line
6 Valve
7 Pressure sensor
8 Regulating electronics
9 Solenoid proportional-control valve
Y87 Electric-pneumatic converter (EPW)
The electric-pneumatic converter (EPW) (Y87) modulates pressure according to the modulated input signal (specified value from the control unit of the engine control (MR)) in the blow-off element control line (1).
The regulating electronics (8) compares the specified value with the pressure in the blow-off element control line(1).
The pressure in the blow-off element control line (1) is measured by the pressure sensor (7).
One of the regulated quantities generated by the regulating electronics (8) actuates the valve (6) for admitting and removing air with the proportional magnets (9) till the required pressure in the blow-off element control line (1) is set.