> > Det er bl.a. det som giver effektforøgelsen men lige så vigtigt køler
den
> > turboen ved hård belastning.
>
> HMM Vrøvl! den køler luften ind til motoren derved kan man ha mer
> ilt/luft pr. kubikcentimeter...den sidder jo efter turboen så det med
> køling af turboen er vist lidt svært
Intercooleren nedsætter den termiske belastning på hele motoren. Eftersom
turboen køles af motorolien vil en (voldsom) chipning af motoren resultere i
en øget termisk belastning af motoren og dermed større risiko for
overophedning af turboen forekomme. Ved længere hård kørsel har jeg så hørt
at det er turboen der står først af (i andre tilfælde kan stemplerne smelte
osv.)
MVH EjS
http://www.nissanperformancemag.com/april05/nerds/
An intercooler directs hot air away from the turbo cooling down the intake
charge and increasing intake charge density, reducing thermal load.
http://www.teamfc3s.org/performance/T2ic.htm
"Why does the intake charge have to be cooled?" is the frequently asked
question. Well, a simple answer is because the charge coming out of a
normal turbo can be as high as +300F degrees!! At that temperature, air is
very thin and has low density. Reducing the intake charge temperature can
greatly reduce the chance of detonation, the most common killer to a turbo
rotary engine. An effecient IC will provide significant power gains versus
an ineffecient IC, even at the same boost levels. With a cooler intake
charge, the boost level can be safely turned higher to achieve even more
power gains.
http://www.freeautoadvice.com/diesel/psdintcool.html
A one degree decrease in intake manifold temperature will result in a one
degree decrease in exhaust temperature. This will not only make it easier on
the exhaust valves,but it reduces the heat rejection requirement of the
engine.
The cooling of the charge will lower the pressure, this will help to
decrease the combustion chamber pressure and reduce the stress on the
engine.
All in all, an intercooler is one of the best improvements for a turbo
engine, gas or diesel.