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then consider the path of the coolant in the zone of heated parts
of the engine. Pay special attention to the principle of the
device, which provides the movement of heat-carrier, maintains
a specified level of thermal state of the engine.
5.4 Individual task. Each student, on the basis of a
positive assessment, receives an individual task for laboratory
work at a poll in the class.
5.4.1 Draw out the principle diagram of the engine
cooling system KamAZ-740 for one of the characteristic modes
of its operation (when starting the engine, while idling and at
low, medium and full load, after stopping the engine).
5.4.2 Draw a sketch of the details of one of the devices
of the cooling system with the application of the main
dimensions.
5.4.3 According to the dimensions of the pump and fan
elements, determine its feed, with known nominal power and
crankshaft speed.

5.5 Control questions:
1. What type of cooling system are used in this engine?
2. What is the cooling system used for?
3. What are the main elements of the system of liquid and
air cooling?
4. What requirements are put in the coolants of the cooling
system?
5. What is the stiffness of the water, what is it called and
how can it be avoided or reduced?
6. What types of salts determine the temporal and constant
stiffness of water?
7. Water which rigidity can be poured into the cooling
system of the piston engine?
8. How is the coolant circulation circulating in cooling
systems?

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