Atkins Cycle

[Cyker]

Summary:

1.5 1NZ-FXE - Atkinson ONLY

1.8 2ZR-FXE - Atkinson ONLY

1.5 M15A-FXE - Atkinson AND Otto

2.0 M20A-FXS - Atkinson AND Otto

[TonyHSD]

13 hours ago, Cyker said:

Summary:

1.5 1NZ-FXE - Atkinson ONLY

1.8 2ZR-FXE - Atkinson ONLY

1.5 M15A-FXE - Atkinson AND Otto

2.0 M20A-FXS - Atkinson AND Otto

So the 1.8  are electric cars with petrol range extender 🪫⚠️😅

the 1.5 and 2.0 are petrol cars with electric motors ⚡️🏎

 

Just kidding 😅

[rado77]

I think that for 1.5 and 2.0 it's because of combination of direct/indirect injection...maybe

[APS]

14 hours ago, Cyker said:

Atkinson ONLY

Possible marketing monikers Toyota could have considered:

Quasi Atkinson Cycle Kinetics - QACK! 🦆 

Generator with Atkinson Imposter - GenAI 

Really Reduced Squeeze with Pathetic Bang - RRSPBerry

[Cyker]

7 hours ago, rado77 said:

I think that for 1.5 and 2.0 it's because of combination of direct/indirect injection...maybe

Alas while the 2.0 M20A-FXS does have D4S (i.e. port and direct injection), the 1.5 M15A-FXE is port-injection only!

Whether they support Atkinson-only or Atkinson/Otto is all down to the VVTi system installed on the car - The ones that can do both are VVT-iW, with the W meaning it has wideband cam phasors, so it can advance or retard the timing a lot more than the normal VVTi

 

[rado77]

Good to know Cyker ;-) Thx! I didn't know about VVT-iW. But the fact is that I don't study new engine techs...stucked on classic athmosferic engines (age 46) :-)

[Cyker]

I do get a bit obsessive with them  

Partly the fault of this website https://toyota-club.net which has more about Toyota engines than you'd ever want to know   

but I've always been a function-over-form person, so while others are looking at rim size and colour choices I'm looking at the engines and how many degrees of advance and valve lift it has  

Edit: These sorts of videos are fun too