Cylinder camshaft regulating valve failure with engine failure light on
The camshaft control valve (OVC valve) is a solenoid valve used to adjust the opening and closing time of the valve. It can advance or lag the intake time and adjust the phase of the engine Engine Camshaft For Mercedes Benz, so that the valve opening and closing time varies with The change of the engine speed can improve the combustion efficiency of combustible gas in the cylinder, increase the engine power, and then make the engine work to an ideal state.
The camshaft solenoid regulating valve is installed on the camshaft housing and is part of the engine oil circuit. The solenoid valve is based on the control signal of the ECU. The oil is guided to the corresponding channel of the camshaft blade adjuster according to the adjustment requirements, and the rotor in the blade adjuster rotates forward or backward according to the oil pressure, so as to achieve the purpose of adjusting the timing.
Camshaft control valve failure phenomenon
Engine failure light is on, vehicle acceleration is weak, fuel consumption increases, engine operating conditions Unstable, low-speed rotation of the engine easily stalls, etc.
Common failures of camshaft regulating valve
Cylinder bank 2 camshaft regulating valve exhaust is open, cylinder bank 2 intake valve camshaft adjustment is too slow, Cylinder bank 1 intake camshaft adjustment open circuit, camshaft adjustment intake valve cylinder bank 1 did not reach the standard value during cold start, etc.
Camshaft control valve failure detection< /p>
First open the cylinder head and observe whether the outside of the camshaft adjusting valve is leaking. Observe the upper and lower parts, one part is the base rubber ring of the solenoid valve, and the second part is the camshaft adjusting valve plug connection; Check whether the plug connection of the camshaft adjusting solenoid valve is correct, whether the plug is loose, whether the plug is deformed, damaged or corroded, and whether the circuit at the joint is damaged.
Use a multimeter to detect the voltage supply of the camshaft adjustment solenoid valve, turn on the ignition switch and measure the voltage between its 1 pin and the ground. The voltage value should be greater than 11.5V. Less than 11.5V indicates that the power supply line is open or virtual. It is necessary to detect the line between the relay and solenoid valve and the power supply to determine the fault point.
Check whether the solenoid valve itself is open, disconnect the plug, and measure the resistance between the solenoid valve 1 and 2 feet. The resistance should be in 5Ω~10Ω, if it is not in this range, it means that the solenoid valve is faulty and should be replaced.
If the voltage supply of the solenoid valve and the solenoid valve itself are not faulty, the cause of the fault may be Engine control unit or wiring problems and mechanical failure of the solenoid valve, the solenoid valve may be stuck by foreign objects, etc., you can continue to troubleshoot step by step.
The emergence of automobile fault codes comes from the failure of the accessory itself on the one hand, and from other related accessories on the other hand. The problem must be gradually eliminated and finally solved.
After the above introduction, do you all understand? The above is an explanation of the failure of the cylinder camshaft adjustment valve. I hope you can use it for your reference. The above summary is for your reference only.
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