Audi 4.2-liter V8 FSI, Обучение по обслуживанию

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Cooling System
19
Audi RS4 4 .2L V8 FSI Cooling System
Coolant Pump and Thermostat
The 4.2L V8 FSI engine in the RS4 does not use the map-
controlled thermostat as found in the Audi Q7 engine.
To achieve more effective cooling, two additional coolers
are used. Coolant flows continuously through one of
the additional coolers. The second additional cooler is
opened via a coolant thermostat.
To avoid excessive heating-up after shutting off the hot
engine, the coolant run-on pump is activated a preset
period of time after the engine is shut off. The pump
run-on time and the need for additional activation
of both radiator fans are determined on the basis of
characteristic maps. Various measured quantities
are included in the calculation (engine temperature,
ambient temperature, engine oil temperature and fuel
consumption).
t°
377_031
Coolant Thermostat
for Additional Cooler
Additional Cooler, Right Additional Cooler, Left
After-Run Coolant
Pump V51
Non-return Valve
377_034
Coolant Pump
Thermostat
Generator
Oil Cooler Thermostat
Coolant Pump