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elhigh · 04-23-2009, 12:55 PM

I guess I'm thinking in terms of the Miller cycle, then. I keep hearing the Prius engine being described as an Atkinson cycle, but when I read the description, I can't help but wonder to myself, how's that different from the Miller? Late-close vs. early-close? I dunno. I know the Prius' engine stroke doesn't change - nobody's done that, yet.

But all the descriptions I read of the Miller specifically mention forced induction. And I see numbers like a 15% improvement in efficiency (compared to...?) which would be nothing to sneeze at. If I could have that, it'd push me over 40mpg.

04-23-2009, 12:55 PM	#3 (permalink)
elhigh Master Novice Join Date: Jan 2008 Location: SE USA - East Tennessee Posts: 2,314 Josie - '87 Toyota Pickup 90 day: 29.5 mpg (US) Felicia - '09 Toyota Prius Base 90 day: 50.48 mpg (US) Thanks: 427 Thanked 616 Times in 450 Posts	I guess I'm thinking in terms of the Miller cycle, then. I keep hearing the Prius engine being described as an Atkinson cycle, but when I read the description, I can't help but wonder to myself, how's that different from the Miller? Late-close vs. early-close? I dunno. I know the Prius' engine stroke doesn't change - nobody's done that, yet. But all the descriptions I read of the Miller specifically mention forced induction. And I see numbers like a 15% improvement in efficiency (compared to...?) which would be nothing to sneeze at. If I could have that, it'd push me over 40mpg. __________________ Lead or follow. Either is fine.