Variable Valve Timing Solenoid: Description and Operation

GF05.20-P-2100MCC Component Description For Adjustable Camshaft Timing Solenoid








Y49 Adjustable camshaft timing solenoid

Location
The adjustable camshaft timing solenoid is located at the upper right on the cylinder head.

Task
The adjustable camshaft timing solenoid controls the oil pressure for the camshaft adjuster.







1 Camshaft adjuster
2 Feed to oil pump
3 Oil line "advanced"
4 Oil line "retarded"
5 Return flow
Y49 Adjustable camshaft timing solenoid

Function
Actuation of the adjustable camshaft timing solenoid takes place map-controlled via the ME-SFI [ME] control unit (N3/10).
The adjustable camshaft timing solenoid integrated in the oil circuit guides the engine oil, according to actuation, through the ME-SFI [ME] control unit (N3/10), via the oil pressure line "advanced" or the oil pressure line "retarded" to the camshaft adjuster.
Excess engine oil in the engine oil circuit is led back via the return on the adjustable camshaft timing solenoid.