1、 Radiator
Core function: To dissipate excess heat generated by the engine and ensure that the engine operates within a suitable temperature range (usually 80-95 ℃). If the heat dissipation is insufficient, it can cause the engine to overheat, reduce power, or even be damaged.
System collaboration: Cooperate with components such as water pumps, thermostats, fans, etc. to form a water cooling system cycle. The radiator is responsible for the final heat release, accounting for 20% -30% of the total heat dissipation of the engine.
Other functions:
Indirectly reducing oil temperature through coolant circulation (some models integrate an oil radiator).
Provide heat dissipation support for the air conditioning condenser (the two are often arranged side by side on the front of the car).
2、 Working principle
Heat exchange process:
Coolant circulation: High temperature coolant flows out of the engine water jacket, is pressurized by the water pump, and enters the radiator inlet chamber, flowing through the flat aluminum pipe (radiator core).
Air cooling: External air takes away heat through heat dissipation fins (corrugated design to increase surface area), and the coolant temperature drops before returning to the engine.
Forced convection: The fan or airflow during driving accelerates heat dissipation, and some models adjust the air flow through blinds.
Material and design optimization:
The radiator core is mostly made of aluminum, which balances thermal conductivity and lightweight.
The layout of the pipeline, the shape of the heat sink (such as corrugated), and the type of fan directly affect the heat dissipation efficiency.
3、 Maintenance suggestions
Regular cleaning: Avoid clogging the heat sink with willow catkins and dust, which may affect the heat dissipation efficiency (it is recommended to clean after spring every year).
Coolant inspection: Ensure that the antifreeze ratio and level are normal to prevent corrosion or abnormal boiling points.
System inspection: Pay attention to whether the water pump and thermostat are working properly to avoid circulation faults.