Pilot 2WD V6-3.5L (2006)
Variable Valve Timing Solenoid: Description and Operation
Variable Cylinder Management (VCM) System (J35Z1 Engine)
The i-VTEC (intelligent variable valve timing and lift electric control system) adopts a cylinder pause VTEC (variable cylinder system). The cylinder
pause VTEC system pauses the intake and exhaust valves on the rear bank under certain conditions such as cruise and fuel cut (see illustration). Since the
valves on the rear bank are closed, the frictional losses from valve spring compression and pumping are reduced because no air is compressed in the rear
bank. This reduces engine drag.
The vibration generated by three-cylinder operation is counteracted by an active control engine mount system.
Operation
During 6 Cylinder Mode (Intake valve side)
With the rocker arm oil control solenoid (VTEC solenoid valve) off, the rocker arm oil control valve (VTEC spool valve) switches oil pressure. Oil
pressure then enters primary rocker arm A from the oil passage in the intake rocker shaft, and it moves the VTEC switching piston in the rocker arm.
This causes the VTEC switching piston to slide into primary rocker arm B, locking primary rocker arms A and B together. Primary rocker arms A and B
are then actuated by the secondary rocker arm.
