CONTROL VALVE USED FOR VALVE TIMING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE, METHOD FOR CONTROLLING SAME, AND VALVE TIMING CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE

摘要

Provided is a control valve (SV) capable of switching between the following positions: a first position for providing communication between an ignition advance port (P1) and a drain port (P4) and also providing communication between an ignition delay port (P2) and a supply port (P3); a second position for limiting communication between the ignition delay port (P2) and an ignition delay passage (L2) and also limiting communication between the ignition advance port (P1) and an ignition advance passage (L1); a third position for providing communication between the ignition delay port (P2) and the drain port (P4) and also providing communication between the ignition advance port (P1) and the supply port (P3); and a fourth position for providing communication between the ignition advance port (P1), the ignition delay port (P2), and the drain port (P4) and limiting communication between the ignition advance port (P1), the ignition delay port (P2), and the supply port (P3).