reading after the engine is started, immediately
shut down the engine for overhaul.
4) Operation of supercharger
The supercharger is installed at the rear upper end of
engine, consisting of turbine assembly and pump
impeller assembly. The exhaust gas discharged by the
engine will drive the turbine and the pump impeller
on the same shaft to rotate at a high speed,
discharging the compressed air into the engine air
intake pipe to increase the intake pressure and
increasing the engine power.
The rotor in the supercharger normally runs at a very
high speed (about 70,000–100,000 rpm). The rotor
bearing is forced lubricated with hydraulic oil
provided by engine main oil duct. The oil supply will
be cut off as long as the engine shuts down.
Precautions during operation:
a. To start the engine, run it at idle speed for 2-3
min without depressing the accelerator forcibly in
this process, and do not apply load until the oil
pressure and temperature are both normal (especially
for start-up in cold days); otherwise, the damage
caused by early wear can is likely to occur to bearing
and sealing ring of supercharger.
b. To shut down the engine, always run it at idle
speed for 2-3 min, and shut it down after the
supercharger slows down. Pay special attention not to
depressing the accelerator forcibly before the engine
stops. If the supercharger will decelerates
substantially due to the sudden rise of engine speed
when the engine shuts down all in a sudden, the oil
pump will stop oil supply immediately; however, the
rotor of supercharger will keep rotating at a high
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