Pic. 2.230. Phase regulator solenoid valve: 1 - valve
The phase shifter is disabled or is controlled by the injection computer via a solenoid valve located on the cylinder head cover (pic. 2.230).
At a crankshaft speed within 1500–4300 min–1 The ECU supplies power to the solenoid valve.
When exceeding 4300 min–1 the power to the solenoid valve is cut off. At the same time, the position of the phase regulator mechanism contributes to filling the cylinders at a high crankshaft speed. In this position, the locking plunger blocks the mechanism.
Note. At a speed of up to 1500 min-1 supply voltage is not applied to the solenoid valve. The mechanism is blocked by a plunger. From the moment power is supplied to the solenoid valve 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 solenoid valve is closed. The valve opens the oil passage to control the phase regulator under the following conditions:
- no malfunction of the crankshaft speed sensor;
- no faults in the camshaft position sensors;
- no malfunctions in the injection system;
- after starting the engine;
- the engine is not idling;
- the battery voltage is higher than 11.4 V;
- coolant temperature above 30°C;
- engine speed is 1500–4300 min–1;
- load over 87% (approx. 900 Mbar).
Attention! When the solenoid valve is locked in the open position, the engine idles unsteadily, the pressure in the intake manifold is increased.