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Oct 1, 2014 | 05:54 PM

#16

Droid13

Pole Position

Joined: Dec 2012

Posts: 2,111

Likes: 934

From: Toronto, ON

Quote:

Originally Posted by ericsan13

Can you please cite where you found that current RX450h has Atkinson/Otto switching? I thought this is new to the NX and RC F.

Google searches find that RX450h is Atkinson only and RX450h has VVT-i and not the NX200t's VVT-iW.

Lexus is supposedly bringing D4-S to the RX350, which means it will likely use the 2GR-FSE engine. Is D4-S compatible with the 450h's 2GR-FXE engine?

-Eric

Sources:
http://en.wikipedia.org/wiki/VVT-i#VVT-iW
http://en.wikipedia.org/wiki/Toyota_GR_engine

I think it's all a matter of degrees. Valve timing degrees that is. The Aktinson/Otto switching engines, as Toyota calls them, implements variable valve timing system with a wider range of adjustment on intake (VVT-iW), allowing the engine to breathe ala atkinson. The current RX engine has variable valve timing too, but just the VVT-i which doesn't offer the same range of adjustment.