The spool valve switches the variable valve timing and lift electronic control (VTEC) mechanism by switching oil passages in the rocker arm in the engine according to commands from the ECU. The consumption flow rate is reduced by using a three-way valve solenoid, delivering a stable response even when hydraulic pressure is low. Utilizing our experience with inexpensive two-way valve solenoid type designs and die-cast technology, and with processing technology, we have provided a product that meet the needs of our customers for sophistication and miniaturization