Fig. 2.209. Electromagnetic valve of regulation of pressure of pressurization: 1 – pneumatic actuator; 2 – electromagnetic valve

The pneumatic actuator of the regulator of pressure of pressurization is run by the electromagnetic valve on the EBU teams of system of injection (fig. 2.209).

The pneumatic actuator of the regulator of pressure of pressurization is run by the electromagnetic valve on the EBU teams of system of injection.

In a starting position the valve of the regulator of pressure of pressurization is closed, and the electromagnetic valve is open.

In open situation the electromagnetic valve connects a turbocompressor exit (pressurization pressure) to a pneumatic actuator therefore pressure of pressurization influences directly a pneumatic actuator and the valve of the regulator of pressure opens.

At control of the electromagnetic valve the pressurization pressure signal (measured at the turbocompressor exit) is given on a turbocompressor entrance. Therefore, pressurization pressure is taken off of a pneumatic actuator, and the valve of the regulator of pressure is closed.

After start of the engine supply voltage arrives on the electromagnetic valve which in a starting position is open. However during a certain period which duration depends on temperature of cooling liquid pressure of pressurization is limited and the frequency of rotation of a bent shaft of the engine cannot exceed 2500 ^min.-1.

It is necessary that oil managed to arrive to turbocompressor bearings.

Fig. 2.210. Scheme of regulation of pressure of pressurization