To increase a total airflow volume, a fan having six blades is used.
CYLINDER BLOCK
To reduce the residual sand of a cast within the water jacket, the water hole shapes on
the upper surface of the cylinder block are increased maintaining the current change amount
of the cylinder. To reduce the amount of the components, the sleeve of the cylinder liner is deleted maintaining
durability. To bring the smooth flow of the cooling fluid along the cylinder liner, a corrugated type
is used for the cross sectional area of the water jacket.
CYLINDER HEAD
The cylinder head is a DOHC and corresponds to a cross flow. Two kinds of longitudinal intake ports are used.
ROCKER COVER
Corresponding to the common rail system, a rocker cover gasket has a favorable construction
to durability.
CYLINDER HEAD GASKET
A carbon-coated gasket is inherited corresponding to high pressure in the cylinder, and
this has the shapes of the water holes in which the cooling capability of the newer cylinder
head is considered.
PISTON
By a deep bowl type combustion chamber corresponding to a direct injection, a low speed torque
is improved. To improve durability, the piston pin diameter is increased and the dimension is reduced
between the piston pin and the boss. A graphite coating is applied to the skirt. To optimum piston’s slap sound, the pinhole is offset.
VALVE MECHANISM
To improve an engine performance and correspond to exhaust gas regulation, a DOHC 4 valve construction
is used. 4 valves and an injection nozzle located at the center optimize fuel combustion efficiency. By using the roller rocker arm, a higher output and lower friction are realized. A gear drive is applied between intake and exhaust cams, and the cylinder head is designed
to be compact. By using the scissors gear between cam gears, a gear backlash noise is reduced.
ROLLER ROCKER ARM
By the lightweight rocker arm made of steel plate and the roller sliding friction reduced,
a lower friction is realized. A double roller proved in a diesel engine is used in the rocker arm construction. By using the rocker arm made of steel plate, the lightweight roller rocker arm is realized,
assuring stiffness.
CAMSHAFT
By using the scissors gear in drive gears between cams, the noise is reduced. By placing a main gear and a sub gear to a drive side, a load can be applied to the direction
in which the sub gear has no backlash, resulting a gear backlash sound greatly reduce
EGR COOLER
The seven layer type of the EGR cooler is used to improve the EGR cooler efficiency.
DRIVE BELT
A Serpentine belt drive is used, which is a maintenance-free and drives all accessories
using one V-ribbed belt.