4.8.3 Forced circulation water cooling system
Water cooling system with forced circulation of liquid includes cooling jackets for the cylinder head and engine block (we wrote about the jackets above, while examining a single-cylinder engine), a radiator, lower and upper connecting pipes with hoses and a water pump with a water distribution pipe, a fan and a thermostat.
When the engine is running, a water pump driven from it creates a circular circulation of water through the engine cooling jacket, pipes and radiator. The water is first directed through the water distribution pipe to the hottest parts of the engine block. While passing through the cooling jacket of the engine block and cylinder head, the coolant washes the walls of the cylinders and combustion chambers, at the same time cooling the engine. The heated coolant enters the radiator through the upper pipe. There, branching through the pipes into thin streams, it is cooled by air, which seeps past the pipes under the action of the thrust, which is created by the rotating fan blades. Cooled coolant re-enters the engine cooling jacket.
Figure 4.32 Cooling system diagram.
2 MB