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beatr911 · 10-15-2012, 03:54 PM

I think I recall reading somewhere that a natually aspirated fixed cam Miller cycle engine had a very narrow power band. Maybe thats why the cam phasers are used on the Prius and others, to widen the useable rpm to a more useful span.

I think it would be a good idea to look at an existing sample engine to verify this.

Maybe engines with cam phasers should be added to the requirements. What motorcycles have variable valve trains? All I can think of are the Kawasaki Concours 14, and (I think) the Honda VFR 800. Both have EFI. Any others?

10-15-2012, 03:54 PM	#17 (permalink)
beatr911 Master EcoModder Join Date: Feb 2008 Location: West Coast, USA Posts: 516 B2300 - '96 Mazda B2300 SE Focus - '05 Ford Focus ST The red car - '00 Honda Insight Thanks: 6 Thanked 77 Times in 56 Posts	I think I recall reading somewhere that a natually aspirated fixed cam Miller cycle engine had a very narrow power band. Maybe thats why the cam phasers are used on the Prius and others, to widen the useable rpm to a more useful span. I think it would be a good idea to look at an existing sample engine to verify this. Maybe engines with cam phasers should be added to the requirements. What motorcycles have variable valve trains? All I can think of are the Kawasaki Concours 14, and (I think) the Honda VFR 800. Both have EFI. Any others? __________________ Good design is simple. Getting there isn't.