C O N T E N T S

Key words: supercharged engine, computer simulation, Phoenics
software.
A NEW SOLUTION TO IMPROVE THE CONTACT
CONDITIONS IN THE DISTRIBUTION SYSTEMS OF THE
INTERNAL COMBUSTION ENGINES
by
GHEORGHE MANOLACHE, EDWARD RAKOŞI, RADU ROŞCA
and SORINEL TALIF
Abstract. The paper presents the results of an analysis concerning
the main factors affecting the cam-follower contact conditions,
emphasizing the influence of the lubrication regime conditions over the
couple wear reduction; an original technical solution is proposed and
studied for the improvement of the lubrication regime and engine life, in
order to preserve the engine performances and pollution level.
Key words: contact conditions improvement, distribution systems,
internal combustion engines.
EXPERIMENTAL VALIDATION OF A NUMERICAL METHOD
FOR CALCULATING PORT INJECTION
AIR-FUEL MIXTURE STATE PARAMETERS
by
ADRIAN IRIMESCU, DĂNILĂ IORGA, LIVIU MIHON and IOAN
HITICAŞ
Abstract. Air-fuel mixture formation in port injection spark
ignition engines is a complex process of heat and mass transfer. Intake
air is mixed with pulverized gasoline that follows a multi-stage process
in which the liquid is broken into small size droplets and then evaporates.
How much fuel actually evaporates depends on various conditions such
as manifold pressure, air temperature and relative humidity, as well as
air-fuel ratio. Experimental results obtained during measurements with a
time span of one year confirm the validity of the numerical method
developed for calculating air-fuel mixture state parameters. Measured
mixture temperature values are very close to the results obtained through