Fig. 2.230. Phase regulator electromagnetic valve: 1 – valve
The phase regulator is disabled or controlled by the injection system ECU via an electromagnetic valve installed on the cylinder head cover (fig. 2.230).
When the crankshaft speed is within 1500–4300 min⁻¹ the ECU supplies supply voltage to the electromagnetic valve.
When 4300 min⁻¹ is exceeded, the electromagnetic valve power supply is cut off. In this case, the position of the phase regulator mechanism facilitates filling of the cylinders at high crankshaft speed. In this position, the locking plunger blocks the mechanism.
Note: At a speed of up to 1500 min⁻¹, the supply voltage is not supplied to the electromagnetic valve. The mechanism is locked by the plunger. From the moment the electromagnetic valve is supplied with power, at a crankshaft speed of more than 1500 min⁻¹, under the action of oil pressure, the locking plunger moves away and releases the mechanism.
In the initial position, the electromagnetic valve is closed. The valve opens the oil passage to control the phase regulator when the following conditions are met:
- no fault with crankshaft speed sensor;
- no faults in camshaft position sensors;
- absence of faults in the injection system;
- after starting the engine;
- the engine is not idling;
- battery voltage is above 11.4 V;
- coolant temperature above 30°C;
- engine speed is 1500–4300 min⁻¹;
- load more than 87% (approximately 900 Mbar).
Attention! When the electromagnetic valve is locked in the open position, the engine runs unstably at idle speed, and the pressure in the intake manifold is increased.