DIESEL ENGINE
05
SERIES
WSM,
01640
(1)
Mechanism
[01640FI
0190
H
Turbocharger Works
While the engine is running, exhaust gas passes
through the exhaust manifold to rotate the turbine wheel
(3)
of the turbocharger (2) at high speed.
Rotation of the turbine wheel rotates the compressor
wheel
(7)
at the same speed because both wheels are
on the same shaft.
As
the compressor wheel rotates, air
is sucked
in,
compressed, and sent into the cylinder.
The higher density
of
the compressed air per cylinder
volume results in increased output compared with non-
turbocharged engines of the same displacement.
Advantages
Turbocharged engine have the following advantages:
1.
Despite the increase in output, there
is
little increase
in friction loss. Therefore, good mechanical
efficiency is insured.
2.
During overlap (when both the suction and exhaust
valves are open), compresed air forces out exhaust
gas and fills the cylinder with fresh air. This
increases combustion efficiency.
3.
Improvements
in
mechanical and combustion
efficiency lead to a lower fuel consumption.
(1)
Air
Cleaner
(2)
Turbocharger
(7)
Compressor Wheel
(3)
Turbine Wheel
(4)
Waste Gate
Valve
(5)
Exhaust
Valve
(6)
Intake
Valve
(a)
Air
(b)
ExhaustGas
01
640M
10080
M-45
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