Active valve lift system
The I-Active Valve Lift System (i stands for intelligence) or i-AVLS is a
Engine Control Unit (ECU). To select different valve lift modes, oil pressure generated by the engine moves a pin which locks the two lobes together. At low engine speeds the low/mid lift camshafts increases the speed of air rushing into the engine thereby increasing torque and efficiency. At higher engine speeds the high lift camshafts fully open the intake valves, reducing resistance to incoming air and improving power. AVLS only operates one of the intake valves in each cylinder as the other is always open to promote swirl.[1]
References
- ^ Heidbrink, Scott. "It's what makes a subaru a subaru: i-AVLS". Subaru America. Archived from the original on 24 June 2012. Retrieved 14 January 2013.
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