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Home >> Jaguar >> 2014 >> XK Base, 2D Coupe >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine - V8 N/A 5.0L Petrol -- XK/X150 >> Engine - V8 N/A 5.0L Petrol >> Engine >> Description And Operation >> Valve Train >> Camshaft Profile Switching Solenoids

Camshaft Profile Switching Solenoids

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The CPS solenoids control the supply of engine oil pressure to the locking pins in the switchable tappets, to switch the tappets between the two cam profiles.

A CPS solenoid is installed on the rear of each cylinder block. Each CPS solenoid has a pintle installed in a sleeve, which incorporates oil inlet and outlet holes. The sleeve is installed at the junction of oil galleries in the cylinder head, with the oil inlet and outlet holes aligned with the galleries. Movement of the pintle in the sleeve controls a connection between the oil galleries. When the CPS solenoid is energized, the pintle connects an oil supply gallery to the gallery along the outboard side of the switchable tappets. When the CPS solenoid is de-energized, the oil gallery along the outboard side of the switchable tappets is connected to drain.

The CPS solenoids receive a fused battery supply from the main relay. The ECM switches a ground connection to operate the solenoids.

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