Mercedes S-Class W-140

In 1991-1999 editions

Repair and enterprise of the car

Mercedes S-Class
+ Mercedes Benz cars of the class S (W-140)
+ operation manual
+ Routine maintenance
+ Motor
- Cooling systems, heating
   Specifications
   + motor cooling system
   + systems of ventilation, heating and air conditioning
+ systems of power supply and edition
+ electric equipment of the motor
+ gear shifting boxes
+ Awtomatitscheckaja transmission
+ connection
+ brake system
+ Aufhängung and management
+ body
+ electric onboard equipment

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Cooling systems, heating

General information

Motor cooling system

All models of the cars considered in the modern management are equipped with the motor cooling system working with an excess pressure with thermostatic management of the address of working liquid. The water pump is strengthened on the block of the motor and guarantees prokatschku of the cooled ochladitelnyj liquid a path of the last. Current of liquid washes regions of an arrangement each of cylinders in the block then it goes in thinking out the motor. Investing in Gissen of the block and the head of ochladitelnyje cylinders channels guarantee intensive cooling of harbors of access and final harbors, regions of the device of spark plugs and judging banks of locking valves.

General scheme of functioning of the cooling system


1 — the Expanding container 2 — a cover 3 — silikogelewyj of containers Is established 4 — Einlassstutzen 5 — the heater 6 — the thermostat 7 — the listener of ventilation 8 — motor current to the heater 9 — heater current to the motor 10 — the cooling system pump	11 — the Fat heater 12 — the block of cylinders 13 — the head of the block of cylinders 14 — the Aggravating heater pipeline 15 — stekloomywatelej heater 16 — the heater heater 17 — the gate of double pulsing 18 — the address pump 19 — the Coming-back listener of the heater

From the date of start of the motor the cooling system goes by means of 3 modes of functioning: in the first stage until temperature of the cooled liquid of a tsirkuliruyem is higher than a certain value, they after a small circle the heater is excluded from its working contour. Depending on the following warming up of liquid tareltschatyj the gate in detail to the highway of the woskosapolnennogo system of the thermostat reveals and in an address contour the heater joins. Further, after temperature of the cooled liquid of the following control value, addresses thermoempfindlichen to the touch switch which guarantees activization of the fan of the cooling system, the additional air current aggravates efficiency of functioning of Wärmeübertragers of the heater considerably raises.

The cooling system has a dense design and it is necessary to take out the heater, is capable is densely hidden, a certain excess pressure that guarantees increase in a boiling point of the cooled liquid and according to efficiency of teplootwoda the heater. At excess of internal pressure in system of some certain value, flooding of abundance of the cooled liquid happens after accession (pereliwnoj) to the listener in the expanding container. Depending on cooling of system liquid from a container automatically comes back to the heater.

Doliwanije of the cooled liquid in system at the same time is made by a neck of the expanding container (watch chapter Routine maintenance) it the abundance of liquid which is forced out from the heater a role plays also ressiwera, accumulating in itself it.

Because of the listed features of a design, such cooling system received a name closed as are excluded in its some functional losses of a working body.

System of heating and ventilation

The system of heating exists from fans and Wärmeübertragern which Forward in blocks it and are located to back parts of salon. Hotly cooled liquid goes Wärmeübertrager. At shift of a hvataniye of management of the modes of the heater, located on the control panel (watch comfort of the head the operation manual in more detail) gates reveal and hot air begins to work in a car interior. If to accept the heater fan, air will be inevitably served in salon.

External air before getting to salon, goes by means of the filter (address the head to Routine maintenance). The main participation of particles of dust will go down in the filter. It is necessary to pay attention to frequency of compensation of the filter. The filter blocked by dust will limit transfer of air to salon that will lead to air sastaiwaniju within salon.

Distribution of streams of air of system of ventilation is carried out by means of saslonok. The mode of the address of air is provided. Saslonki cope with Servoantriebe help.

Independent heater

The independent heater which guarantees a possibility of the independent warm movement of motors and to car interiors after a signal of hours of switching or from YOU panel can belong to a budget complete set of the separated models. The principle of functioning of the independent heater the Independent heater of the head the operation manual is considered in office.