Engine Component Description
Cylinder Block
The cylinder hollow frame structured 4 cylinder in-line. The
block has 5 crankshaft bearings with the thrust bearing located on
the third bearing from the front of the engine.
Crankshaft
The crankshaft is a steel crankshaft. It is supported in 5 main
journals with main bearings which have oil clearance for
lubricating. The 3rd bearing of the 5 main bearing is the thrust
bearing whose the crankshaft has properly axial end play.
Oil Pump
The oil pump is a rotary pump located on the timing side and
driven be the timing belt. The oil pump draws engine oil from the
oil pan and feeds it under pressure to the various parts of the
engine. At high engine speeds, the oil pump supplies a much higher
amount of oil than required for lubrication of the engine. The oil
pressure regulator prevents that too much engine oil is entering
the lubricating passages.
Piston And Connecting Rod
The pistons are aluminum pistons with top land. The connecting
rods are fractured steel connecting rods with bushing. The piston
pin is floating the connecting rod bore.
Cylinder Head
This cylinder head is double over head camshaft (DOHC) type and
has 2 camshafts that open 4 valves per cylinder with tappets . The
cylinder head is made of cast aluminum alloy for better strength in
hardness with light weight.
Camshafts And Valve Train
Intake and exhaust camshaft are connected to each other with
gears. The intake camshaft has a sprocket which is driven by the
timing belt. The valve actuation occurs by mechanical valve lifters
which are located between cam and valve stem. In case of excessive
valve clearance the valve lifters have to be replaced to an
appropriate size.
Intake Manifold
The intake manifold is the air flow passage to the cylinder
combustion chamber through the throttle body and has an effect on
engine torque, power, noise, drivability, emission, fuel economy
and performance. It is made of casted aluminum. The intake air
amount is regulated by vacuum controlled flaps.
Turbocharger
The turbocharger is located between exhaust manifold and
catalytic converter. It consists of an exhaust gas turbine and a
fresh air turbine which are connected to each other by a rod. The
exhaust gas turbine is driven by the exhaust gas and the fresh air
turbine is driven by the exhaust gas turbine. The fresh air turbine
creates compressed air which is cooled down in the charger air
cooler. The charge air cooling increases the air density. The
cooled, compressed air is discharged under pressure to the engine.
The turbocharger has a vacuum controlled variable turbine geometry
which modulates the charge pressure to the engine speed and
load.
Exhaust Gas Recirculation System
The recirculation of exhaust gas to the combustion chamber
causes a reduction of NOx - emissions. The reduction of exhaust gas
emissions can be increased by the cooling of the recirculating
exhaust gas. Therefor a exhaust gas recirculation cooler is located
between exhaust manifold and exhaust gas recirculation valve.
Fuel Injection System
The engine is equipped with a common rail direct injection
system. A high pressure fuel pump, driven by the timing belt
discharges the fuel to the fuel rail, where the fuel is stored with
pressure up to 180 Mpa (49312 psi) . The fuel is
injected by electronic controlled fuel injectors direct to the
combustion chamber.
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