Infiniti QX4 service since 1996 of release
1. Introduction
2. Maintenance instruction
3. Routine maintenance
4. Engine
5. Cooling and heating systems
5.1. Specifications
5.2. Antifreeze - general information
5.3. Service of system of cooling
5.4. Removal, installation and check of serviceability of functioning of the thermostat
5.5. Removal, regenerative repair and installation of a radiator of system of cooling
5.6. Replacement of the water pump
5.7. Removal and installation of the fan of system of cooling
5.8. Air lines of distribution of air submitted to salon
5.9. System of automatic air conditioning – a design and a functioning principle
5.10. Design of a refrigerator path of central air of air
5.11. The To/in compressor, - the general information and a functioning principle
5.12. A receiver dehumidifier - the general information and service
5.13. Check of serviceability of functioning and service of systems of heating and air conditioning
5.14. Diagnostics of central air of air
6. Power supply systems and managements
7. Start and charge systems
8. Transmission line
9. Brake system
10. Suspension bracket and steering
11. Body
12. Electric equipment
 












5-9-sistema-avtomaticheskogo-kondicionirovaniya-vozdukha-konstrukciya-i-princip-funkcionirovaniya.html

5.9. System of automatic air conditioning – a design and a functioning principle

The automatic amplifier and electromotors mixing and distributing a zaslonok are incorporated among themselves in a small local network means of lines of a food and data exchange. The network has tire topology (see illustrations the Scheme of the organization of a local network of management of system of automatic air conditioning and the Function chart of elements of management of a local network), short circuit of a network is carried out on a contour of grounding of electromotors.

Address information, teams of management a zaslonok and messages of control of mistakes are transferred by functioning on the network tire in the form of data exchange packages.

Built in electromotors of a drive both a zaslonok local control units carry out the following functions:

  • Recognition of address information;
  • Decoding of data on opening corners zaslonok;
  • Data exchange;
  • Making decision on start and drive stop;
  • Control of a corner of opening of a zaslonka;
  • The comparative analysis of entering teams;
  • Decision-making.

On the basis of the analysis of data arriving from the corresponding information sensors the automatic amplifier defines necessary corners of opening of managing directors a zaslonok and gives out teams to local control units (LCU) of driving electromotors (see an illustration the General scheme of the organization of management of functioning of system of automatic air conditioning).

Control units distinguish the teams addressed to them and by a sravnivaniye of entering data with data from sensors of provision of the zaslonok carry out the corresponding correction of provision of the last, regulating thereby temperature parameters (HOT/COLD) and the direction of distribution (DEFROST/VENT) of the car of an air stream submitted to salon (see an illustration the Principle of functioning of system of automatic control).

The principle of the organization of management of system automatic To/in is presented on the following illustrations:

The choice of a high-speed mode of the fan is made on the basis of value of the temperature set to maintenance, indications of sensors of ambient temperature, temperature in salon of the car, temperatures of an entering stream and sunlight, and also data on the current provision of a mixing zaslonka. At the cold engine activation of the fan is made with the certain delay, allowing to avoid giving in salon of the cooled air.

Automatic control of the provision of an inlet zaslonka is made on the basis of value of the temperature set to maintenance, indications of sensors of ambient temperature, temperature in salon of the car, temperatures of an entering stream and sunlight, and also data on a condition of the compressor (is included/is switched off).

Indications of sensors of ambient temperature belong to number of the parameters defining the provision of a final zaslonka, temperatures in salon of the car, temperatures of an entering stream and sunlight value of the temperature set to maintenance, and also.

Control of functioning of the magnetic coupling of coupling of the compressor carries out the module of engine management (ECM) on the basis of information on the provision of a butterfly valve and the data arriving from the automatic amplifier of system of climate control.

The structure of the automatic amplifier includes the contour of the self-diagnostics providing continuous monitoring of a condition and serviceability of functioning of under control components of system and issue of information on revealed violations.


Scheme of the organization of a local network of management of system of automatic air conditioning


Function chart of elements of management of a local network


General scheme of the organization of management of functioning of system of automatic air conditioning


Principle of functioning of system of automatic control


Function chart of the organization of ventilation / heating / conditioning of salon


The scheme of positions of managing directors a zaslonok depending on a choice of modes of functioning of systems


Options of the directions of distribution of an air stream


Mode of supply of air on obverse level


Mode of supply of air on obverse level and in foot wells


Mode of supply of air in foot wells


Mode of supply of air in foot wells and on having blown in glasses


Mode обдува flew down for the purpose of condensate removal


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5.8. Air lines of distribution of air submitted to salon
on the following page»
5.10. Design of a refrigerator path of central air of air