E39 series BMW 5
since 1996-2001 of release
Repair and car operation
+ Maintenance instruction
+ Current leaving and service
- Systems of cooling, heating
- Cooling system
Check of system of cooling
Removal, installation and thermostat check
Removal and installation of the fan and fan coupling
Removal and installation of a broad tank
Removal and radiator installation
Removal and installation of the pump of cooling liquid
+ air Conditioner
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
+ electric equipment Schemes
+ System of onboard diagnostics
The engine is equipped with circulating system of cooling with thermostatic regulation. While the engine is not heated-up, cooling liquid circulates only in a head and the block of cylinders, and at open heating - in the heat exchanger. At increase of temperature of cooling liquid the thermostat opens a big contour of cooling and liquid arrives in a radiator, passing it from top to down and is cooled with air passing through it. The pump of cooling liquid is actuated by a maple belt of the engine.
On a shaft of the pump of cooling liquid the fan is fixed. The fan provides radiator cooling by air. In the fan there is a vyazkostny coupling. At achievement by the air going from a radiator, temperatures 90°С in the vyazkostny coupling are worked by a bimetallic plate and connects the fan. After that the fan rotates with number of turns of the engine and provides the increased heat exchange until the temperature of cooling air will not fall below +60°С. After that the vyazkostny coupling is disconnected and reduces number of turns of the fan.
Thanks to partial connection of the fan useful engine capacity raises and fuel consumption decreases.
Scheme of a contour of system of cooling
The heataccumulator consists of well isolated store in parallel connected to system of cooling of the engine and located around feet of the forward passenger. Depending on need, it takes away or gives to warmly cooling liquid. The stream of cooling liquid, in the course of work, automatically copes various electromagnetic valves.
The principle of its work is based on use of heat which is liberated at transformation of a non-polluting hydrochloric mix from a liquid state in the firm. Similar to warmth of thawing of ice there is an accumulation of warmth of the warmed-up engine as a result of liquefaction of a hydrochloric mix.
Thus, the thermal accumulator increases traffic safety and comfortableness of the car, without leading to emergence of additional load of environment.
The accumulator does not demand service as management of it is assumed by electronics.
Realization of this function is possible only at temperature of external air not above +15°С, at the heated-up engine to working temperature, and also sufficient tension of the accumulator.