Automatic temperature control

Purpose and the peculiarities of the system of air-conditioning equipped with ATC
Brief description of the ATC system

General

Modern automobiles can be equipped with various air-conditioner control systems, one of such systems is the system of the automatic temperature control of the automobile saloon (АTC).

This system allows optimally to support the temperature parameters set by the driver. In this chapter the fact-finding information on the ATC system is given, allowing to understand the working principle of the system.

Purpose and the peculiarities of the system of air-conditioning equipped with ATC

The system of air-conditioning equipped with АТC is directed mainly for reduction of the fuel consumption, increase of characteristics at street "fuses" and idling.

The system of the automatic temperature control serves for:

maintenance inside of the microclimate necessary to passengers with the help of automatic temperature control and supplied air stream on the basis of using the built - in controller MICOM reacting on internal and external air temperature, solar energy, temperature of the engine cooling liquid;
fast maintenance of passengers with cool and warm air in sufficient amount on the basis of the correct arrangement of elements of the ventilation system and heat exchangers with minimization of resistance to the air stream current.

Amount of air: not less than 130 l/sec.

The scheme of the system of air-conditioning with variable delivery and thermostatic expansion valve


1 – compressor 2 – average pressure switch (fan) 3 – condenser 4 – double switch 5 – dedrater 6 – expansion valve 7 – capillary tube 8 – evaporator	9 – high pressure vapor 10 – high pressure liquid 11 – low pressure liquid 12 – low pressure vapor A – low pressure (delivery) side B – to the compressor muff C – high pressure side (tap) D – high pressure side

Typical elements of the system - evaporator

1 – additional resistor for changing of the fan speed
2 – screws
3 – connections for the liquid tube (entrance tube)
4 – pressure gauge input
5 – temperature gauge
6 – thermostatic expansion valve

Typical elements of the system - heater

1 – heater case
2 – heater hoses
3 – radiator
4 – clip
5 – fastening plate

Typical elements of the system - air blower

1 – fastening screws
2 – feeding tip
3 – air blower engine

Typical elements of system - ventilation


1 – left nozzle 2 – central nozzle 3 – left door nozzle decoration 4 – central nozzle 5 – left hose of ventilation 6 – left external nozzle 7 – back left air line of the heater 8 – back console nozzle 9 – back air line of console	10 – front air line of the console 11 – ventilating air line 12 – right ventilating hose 13 – right external nozzle 14 – right nozzle 15 – right door nozzle decoration 16 – air line of the floor 17 – back left air line of the heater