Perkins 1106C Genset Systems Operation Testing And Adjusting page 11

KENR6931
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Compression
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Power
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Exhaust
On the compression stroke, the piston moves back
up the cylinder and the inlet valves (10) close. The
cool compressed air is compressed further. This
additional compression generates more heat.
Note: If the cold starting system is operating, the
glow plugs (3) will also heat the air in the cylinder.
Just before the piston reaches the TC position, the
ECM operates the electronic unit injector. Fuel is
injected into the cylinder. The air/fuel mixture ignites.
The ignition of the gases initiates the power stroke.
Both the inlet and the exhaust valves are closed
and the expanding gases force the piston downward
toward the bottom center (BC) position.
From the BC position, the piston moves upward.
This initiates the exhaust stroke. The exhaust valves
open. The exhaust gases are forced through the
open exhaust valves into the exhaust manifold.
Exhaust gases from exhaust manifold (1) enter the
turbine side of the turbocharger in order to turn
turbocharger turbine wheel (7). The turbine wheel is
connected to the shaft that drives the compressor
wheel. Exhaust gases from the turbocharger pass
through exhaust outlet (6), a silencer and an exhaust
pipe.
Turbocharger
Illustration 12
Turbocharger
(1) Air intake
(2) Compressor housing
(3) Compressor wheel
(4) Bearing
(5) Oil inlet port
(6) Bearing
(7) Turbine housing
(8) Turbine wheel
(9) Exhaust outlet
(10) Oil outlet port
(11) Exhaust inlet
The turbocharger is mounted on the outlet of the
exhaust manifold in one of two positions on the right
side of the engine, toward the top of the engine or
to the side of the engine. The exhaust gas from
the exhaust manifold enters the exhaust inlet (11)
and passes through the turbine housing (7) of the
turbocharger. Energy from the exhaust gas causes
the turbine wheel (8) to rotate. The turbine wheel is
connected by a shaft to the compressor wheel (3).
As the turbine wheel rotates, the compressor
wheel is rotated. This causes the intake air to be
pressurized through the compressor housing (2) of
the turbocharger.
Systems Operation Section
g00302786
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