Mercedes M-Class W163
since 1997 of release
Repair and car operation
+ Mercedes-Benz Cars of a class M (W163)
+ Governing bodies and receptions of safe operation
+ Current leaving and service
- Systems of cooling, heating and air conditioner
+ System of cooling of the engine
+ Systems of ventilation, heating and air conditioning
+ the Power supply system and production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Manual box of gear shifting
+ Avtomaticheckaya transmission
+ Transmission line
+ Brake and auxiliary systems
+ Suspension bracket and steering
+ Onboard electric equipment
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Systems of cooling, heating and air conditioner
System of cooling of the engine
All models of cars considered in the real Management are equipped with system of cooling of the engine working at superfluous pressure with thermostatic management of circulation of working liquid. The water pump is fixed on the block of the engine and provides pumping of cooling liquid through an okhladitelny path of the last. The stream of liquid washes regions of an arrangement of each of cylinders in the block then goes to a back part of the engine. Laid in molding of the block and a head of cylinders okhladitelny channels provide intensive cooling of inlet and final ports, areas of installation of spark plugs and directing plugs of final valves.
From the moment of engine start the system of cooling passes through three modes of functioning: at the first stage while the temperature of cooling liquid did not rise above a certain value, it circulates on a small circle from which working contour the radiator is excluded. In process of further warming up of liquid the tarelchaty valve entering into a path of system of the voskozapolnenny thermostat opens and the radiator is connected to a contour of circulation. Further, on reaching temperature of cooling liquid of the next control value, works the thermosensitive sensor switch providing activation of the fan of system of cooling, forced which the additional air stream considerably increases efficiency of functioning of the heat exchanger of a radiator.
The system of cooling has a tight design and is densely closed by a cover of the radiator, capable to maintain a certain superfluous pressure that provides increase of a boiling point of cooling liquid and, respectively, efficiency of a heat-conducting path through a radiator. At excess by internal pressure in system of some certain value, there is an overflowing of excess of cooling liquid on a connecting (perelivny) tube in a broad tank. In process of system cooling liquid automatically comes back from a tank to a radiator.
Filling of cooling liquid in system is made through a mouth of a broad tank (see. Head of the Power supply system and production of the fulfilled gases) which at the same time acts also as a receiver accumulating in forced out from a radiator excess of liquid.
In view of the listed features of a design, such system of cooling received the name closed as in it any functional losses of working heat are excluded.
Heating and ventilation system
The system of heating consists of fans and the heat exchangers located in blocks of forward and back parts of salon. Hot cooling liquid passes through heat exchangers. When moving the handle of management by modes of the heater, located on the control panel, valves and hot air open starts to arrive in car salon. If to turn on the heater fan, air will move in salon compulsorily.
External air before getting to salon, is passed through special the filter, in the carburetor the main share of particles of a dust settles. Replacement of the salonny filter should be made on a regular basis according to the Schedule of routine maintenance of the car (see. Head of the Power supply system and production of the fulfilled gases). Violation of passableness of the filter brings with decline of productivity of functioning of systems of heating/ventilation/air conditioning.
Distribution of streams of air of system of ventilation is carried out with the help a zaslonok. Possibility of switching of modes of air circulation is provided. A drive a zaslonok осущестлвяется by means of servomotors.
Air central air
See. Section General information and security measures.