gruntguru wrote:Tommy Cookers wrote:BTW if people Google V Ganesan Internal Combustion Engines
.... Googling dissociation should also get this book at the right pages
they should find Fig 3.6 (page 115 in my copy) showing real engine BTE benefits (from leaning) fall far short of fuel-air theory
and Prof Ganesan's statement .... 'the maximum efficiency is within the lean zone very near the stoichiometric ratio'
Thanks for the reference. Couldn't find the figure in the restricted copy I downloaded. Perhaps you could post an image?
the (part) viewable version seems to be edition 3 c 2007-8
in which the appropriate pages are p151 and p152 Fig 4.6
Googling IC Engines Ganesan will probably get this edition directly
(the CO-related page p540 is anyway not viewable)
IIRC we had a link about 6 weeks ago to a Honda paper on burning a homogeneous mixture at lamda 2
all these papers are surely related to pollution-controlled engines that are run 99% of the time at partial power ie road cars ?
though yes this thread has established that leaning means less peak temp then otherwise, so potentially raising HUCR
CR in F1 would not benefit as we have unlimited-Octane fuel and anyway CR is physically limited by valve size and motion needs ?
Edit - fuel-air cycle predictions of the benefits of raising CR are less favourable/optimistic than ASE-based predictions