[simonepietro]

the S-engine sets new standards of
refinement and performance for a diesel with
its maximum output of 240ps at 3800rpm and
46kg.m of peak torque in the 1700~3500rpm
range, figures which equal if not better the best
V6 diesels today.
With a bore and stroke of 84mm/89mm and a
compression ratio of 17.3:1, the S-engine’s six
cylinders displace 2,959cc and are banked at 60
degrees, the optimal angle to minimize vibrations
in a V6. Leading the list of refinements is
the selection of Compacted Graphite Iron
(CGI) for the cylinder block. Manufactured
with SinterCast technology, the CGI block is
lighter and quieter than conventional grey cast
iron and demonstrates at least 80 percent higher
tensile strength, 45 percent higher stiffness and
Cover Story Hyundai Motor World
approximately double the fatigue strength of
iron and aluminum thus allowing Hyundai
engine designers to improve performance, fuel
economy and durability while reducing emissions
to meet the very latest Euro IV regulations.
The S-Engine breathes through an all-aluminum
head fitted with 24 valves in a dual
overhead configuration and incorporating
hydraulic valve lash adjusters while fuel is
delivered by a second-generation common rail
injection system featuring 1600-bar piezoelectric
injectors. The rapid switching high-pressure
injectors rely on newly developed piezoelectric
actuation technology specifically tuned
to the new combustion process. Piezoelectric
injectors allow finer atomization of the fuel
ensuring more efficient combustion and
enabling more fuel to be injected into the combustion
chamber in a shorter time than would
be possible with conventional solenoid injectors.
S-Engine turbocharging is accomplished
with an electronically controlled variable
geometry system. A serpentine belt and
steel timing chain lowers noise while raising
overall durability and operating precision.
An Electronic Exhaust Gas Recirculation
(EGR) Valve helps control the engine’s emission
of nitrous oxides by reducing combustion
temperature.