This video, we’ll breaks down the design and operation of the Otto, Atkinson, and Miller cycles. We’ll also compare the Otto and Miller engines used in a previous-generation Toyota Corolla, and finally, reveal the secret behind the high compression ratio.
00:00 Introduction
01:00 Otto-cycle
02:48 Atkinson-cycle
04:10 Miller-cycle
06:50 Otto and Miller in Toyota Corolla
08:31 Secret of the High Compression Ratio
#otto
#atkinson
#miller
#cycle
3 Comments
This channel really deserves more subs 🙂
This one point that always confused me is why they sometimes supercharge Miller cycle engines. Surely that just results in the equivalent cylinder fill as if you were to close the intake valve closer to BTC as in an Otto engine. In the end its all about a small cylinder fill compared to the expansion with a compression ratio that is super high geometrically but in operation is normal due to the partial intake cylinder fill.
Unless the idea is that you run with supercharging bypassed for most operational modes and only supercharge under the highest torque demand, and also then have to run super rich to stave off detonation with the now higher than ideal compression ratio.
日産による可変圧縮比エンジンは存在します。
I don't understand why some Miller engines have the IV closing after the BDC and others before. Shouldn't be closing before BDC better to reduce pumping losses?