Theme: NON-ROUND PISTON RINGS
 
Dear Sirs!
                  Scientists from diversity countries have solved complex problems of the shape
piston rings in the free and built in condition,as round so non-round one. The radial
parcel pressure distribution of piston rings at the wall of the cylinder reflex their own
characteristic. This work for mathematical bring about of the pearshaped radial
pressure is based upon Arnold's solved of the mathematical eggshaped radial pressure
as well graphic Svift's solved of the pearshaped. With the help of PC and
coressponding graphic, it have been discovered method of the mathematical
settlement pearshaped serviceable in the production, at the level of the eggshaped. The
method which is known: from pearshaped follow appleshaped, as from eggshaped
follow heartshaped. First for 4-stroke, second for 2-stroke motor.
                 I have pleasure to send you an example of the pear and apple shape of the radial
pressure distribution and the corresponding copier for the smallest degree of
unevenness (dp).
 
                 The system of the estimate is the same for all the forms (pressures
and the copiers) and there are the following shapes:
 
                       - max. pear to min. pear, min. apple to max. apple;
                       - max.egg over circle to max. heart. (It has known from literature.)
 
                The operation is easy and quick.
 
                 Changeable are the following factors :
                      - dp..........the degree of the inequality (for pressure and copier)
                      -  r............the middle radius of the piston ring (for pressure and copier)
                      -  m(cy)....the gap clearance (for copying with CNC machines and in the projected
                                       estimate for the classic machines).
                It is necessary to perform the correction of the cutting angle for different the degree of
                the inequality and shapes.
                Terms of sealing and balance for order statics porter SX=0 ( SY=0, SM=0 ) are satisfied
                 as by Arnold's eggshaped.
                The system is applicable with classical and CNC machines.
 
Advantage :
The right selection of the degree of the inequality weakness the flutters
of the piston rings. In this way a force is lower of the gas and hydraulic.
The power of the engine is increased.
 
I would be very glad if you would show the interest for the application of this
system in the piston rings production.
 
 
Novi Sad 20.08.2001.                                                                        Your sincerely
                                                                                                                   Author