The 2001, 2002 and 2003 RAV4 came with the 148 - hp 2.0 - liter 4 - cylinder DOHC engine with Variable Valve Timing with intelligence (VVT - i). (samarins.com)
It has system of variable valve timing on the intake and exhaust. (mywikimotors.com)
The demand for service media (steam, water and ice water) is also calculated, as this substantially influences the choice of valves for steam regulation and ice water feed. (dairyprocessinghandbook.com)