Re: Prius and Highway 4 slow commute

"Elmo P. Shagnasty" <elmop@xxxxxxxxxxxxxxxx> wrote in message
news:elmop-1B41F3.20525414042011@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Look up Atkinson cycle.

Trust me, the Yaris does not use the same engine that the Prius uses.
Not in any way, shape, or form.

Yes it is, the 1NZ-FXE is identical to the 1NZ-FE except for a higher
physical compression/expansion ratio and altered intake valve timing so that
some of the charge goes back into the intake runner each cycle which results
in a lower effective compression ratio, and since it has VVTi the CR is
variable. It is NOT a true Atkinson, IE it doesn't have the special linkage
between the crank and piston rod. A true Atkinson has unequal stroke
lengths but a fixed compression ratio.

The only thing special about the crank in the 1NZ-FE and 1NZ-FXE is that the
crank centerline is offset from the cylinder bore centerline so that the
rods are more straight during the power strokes, this reduces the side load
on the piston skirt which reduces drag.

Note this image:
http://us1.webpublications.com.au/static/images/articles/i14/1450_10mg.jpg

From this page:
http://autospeed.com/cms/title_The-Toyota-Prius-Part-2/A_1450/article.html


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