In recent months one of the most debated topics
has been certainly the advent of the Ryger engine in the kart
125 KZ , bombastic statements, chitchat and
at today few certainties. Many friends and customers have
asked us for an opinion, and so we tried to give a look. Unfortunately the informations
few so all the assumptions and considerations
be taken lightly, because some particular
hidden could change every speech.
Based on the approval homologation and on some
image of the web, the engine in our view it
characterized by two major innovations:
separate main bearing lubrication system
scavenging pump in the cylinder instead that in the crankcase
From the point of view of the emissions surely have separated
lubrication may be beneficial, while for what concerns
the fluid dynamic aspect , apart to move the scavengine pump
from the crankcase to the cylinder, the cycle appears to be that of a classic 2 stroke engine, and maybe that's why the CIK-FIA did not have
difficult to homologate.
Then the speech of performance apparently become linked to
compression ratio that the scavenging pump is able to
create, to the size of the ports obtained in the cylinder, and to
all that then intervenes in a classic 2-stroke.
Remain the mechanical aspects in fact a piston made in this way, besides not being symmetrical, will certainly have a weight not comparable to conventional pistons, then both the loads to which are subject the organs of the crank mechanism, both the balancing, surely will require specific calculations.
Moreover will be to check the friction of the smaller diameter of the piston
, and how the lubrication will work for all
How to see the unknowns on the operation and any critical issues are so many, however, the innovations are always good , so we have to wait and everything will become clear ... the moment has come!!!