Chapter II Technical Information of Engine
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
11
Fig. 2-1-7 Lubrication System
6. Lubrication System
The lubrication system of engine is as shown in Fig.
2-1-7.
The lubrication system is mainly used to transport
lubricating oil to friction surfaces of all moving parts of
the diesel engine to ensure the lubrication of kinematic
pairs of all engine parts, and reduce friction resistance
and wear of machine elements; it also has other
functions such as cooling, cleaning, sealing and rust
prevention. The lubrication system is mainly composed
of the oil collector, oil pump, oil filter, oil cooler, oil
pressure alarm, lubricating oil pipeline, etc.
Fig. 2-1-8 Cooling System
7. Cooling System
The cooling system of engine is as shown in Fig. 2-1-8.
When the diesel engine is working, the cooling system
radiates excessive heat from the heated parts to keep
the normal working temperature of the diesel engine.
The major components of the cooling system include:
the water tank (radiator), liquid storage tank (overflow
tank), water pump, thermostat, fan, etc.
8. Startup Device
The startup device of engine is as shown in Fig. 2-1-9.
With the action of external force, the startup device
makes the stationary diesel engine begin to rotate
before it can rotate independently. The startup device is
constituted of the starting motor, storage battery, heater
plug and other devices.
In conclusion, the cylinder body, cylinder head, crank
and connecting rod mechanism, valve actuating
mechanism, intake/exhaust systems and fuel supply
system work in coordination with each other and fulfill
the working cycle of the diesel engine directly to
accomplish the transformation of energies. During
operation, the technical conditions of these components
and whether they coordinate with each other correctly
have decisive influences on the engine’s performance.
The lubrication system and cooling system do not
accomplish the working cycle directly; however, they are
indispensable conditions for the long-term and steady
working of the diesel engine. While the startup device
provides an initial condition for the stationary diesel
engine to rotate, therefore sufficient attention should be
given to their working conditions. Otherwise, the normal
work of the diesel engine can not be ensured or serious
damage to engine parts may be caused.
Fig. 2-1-9 Startup Device
Cylinder body
Engine oil filter
Cylinder body
Water pump
installation
assembly
Thermostat assembly
Starting motor
