Impeller; Turbine; Floating Bearing - SSANGYONG 2004 Rexton 2.7XDi Workshop Manual

DI04-8

Impeller

Turbine shaft

Floating bearing

Thrust collar
Impeller
Diffuser
Oil passage

Turbine

The turbine is wings installed at the exhaust end where, by the pressure of exhaust gas, it rotates the compressor and
performs the role of transforming heat energy of exhaust gas into torque energy. The radial type is used as the turbine's
wings. Therefore, during operation of the engine, the turbine receives temperature of exhaust gas and it rotates in high
speed, it requires to have sufficient rigidity and heat resisting property.
During operation of the engine, exhaust gas discharged through the exhaust valve of each cylinder makes turbine rotate
by coming in contact with the turbine's wings from the outer circumference within housing of the turbine and is ex-
hausted through the exhaust manifold. At the same time, as the impeller is on the same shaft, it rotates.
Floating Bearing
Floating Bearing is a bearing, which supports the turbine shaft that rotates at about 10,000 to 15,000 rpm. It could be
rotated freely between the housing and the shaft as it gets lubricated by oil being supplied from the engine.
Notice
Stopping the engine immediately after driving at high speed stops oil from being supplied to the bearing and
may cause it to get burnt. Therefore, the engine must be stopped after cooling the turbo system by sufficiently
idling the engine.
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
Impeller
Turbine
The impeller is wings (wheel) installed on the intake end and
performs the role of pressurizing air into the cylinder.
Y220_04010
The radial type has the impeller plate arranged in straight line
at the center of shaft and, compared to the backward type, is
Turbine
being widely used as it is simple, easy to manufacture and
appropriate for high speed rotation. As the impeller rotates in
the housing with the diffuser installed in it, the air receives
centrifugal force to be accelerated in the direction of housing's
Exhaust gas
outer circumference and flows into the diffuser.
As surface of the passage increases, air flown into the dif-
fuser transforms its speed energy into pressure energy and
flows into the intake manifold where the pressurized air is
supplied to cylinder each time the intake valve of cylinder opens
up. Therefore, the efficiency of compressor is determined by
Y220_04011
the impeller and diffuser.
EXHAUST SYSTEM
DI ENG SM - 2004.4