Service Infiniti QX4 since 1996 of release
1. Introduction
2. The maintenance instruction
3. Routine maintenance
4. The engine
5. Cooling and heating systems
5.1. Specifications
5.2. Antifreeze - the general data
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 an automatic air conditioning – a design and a functioning principle
5.10. A design of a refrigerator path of a central air of air
5.11. Compressor K/V, - the general information and a functioning principle
5.12. The Receiver-dehumidifier - the general information and service
5.13. Check of serviceability of functioning and service of systems of heating and an air conditioning
5.14. Diagnostics of a central air of air
6. Power supply systems and managements
7. Start and charge systems
8. A transmissionnaja line
9. Brake system
10. A suspension bracket and a steering
11. A body
12. An electric equipment
 












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

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

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

The address information, commands of management заслонок and messages of the control of errors are transferred by functioning on the network tyre in the form of data exchange packages.

Built in electromotors of a drive both заслонок local blocks of management carry out following functions:

  • Recognition of the address information;
  • Decoding of the data about opening corners заслонок;
  • Data exchange;
  • Decision-making on start and drive stop;
  • The control of a corner of opening заслонки;
  • The comparative analysis of entering commands;
  • Decision-making.

On the basis of the analysis of the data arriving from corresponding information gauges the automatic amplifier defines necessary corners of opening of managing directors заслонок and gives out commands to local blocks of management (LCU) приводных electromotors (the General scheme of the organisation of management of functioning of system of an automatic air conditioning see an illustration).

Management blocks distinguish the commands addressed to it and a way сравнивания the entering data with the data from gauges of position of the заслонок carry out corresponding updating of position of the last, regulating thereby temperature parametres (HOT/COLD) and a distribution direction (DEFROST/VENT) the car of an air stream submitted to salon (the Principle of functioning of system of automatic control see an illustration).

The principle of the organisation of management of system automatic К/В is presented on 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 gauges of an ambient temperature, temperature in salon of the car, temperatures of an entering stream and a sunlight, and also the data about current position mixing заслонки. At the cold engine fan activation is made with the certain delay, allowing to avoid giving in salon of cooled air.

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

Indications of gauges of an ambient temperature concern number of the parametres defining position final заслонки, temperatures in salon of the car, temperatures of an entering stream and a sunlight value of the temperature set to maintenance, and also.

The control of functioning magnetic муфты compressor couplings carries out the engine management module (ECM) on the basis of the information on position throttle заслонки and the data arriving from the automatic amplifier of system of the 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 delivery of the information on revealed infringements.


The scheme of the organisation of a local network of management of system of an automatic air conditioning


Function chart of elements of management of a local network


The general scheme of the organisation of management of functioning of system of an automatic air conditioning


Principle of functioning of system of automatic control


Function chart of the organisation of ventilation / of heating / of air-conditioning of salon


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


Variants of directions of distribution of an air stream


Mode of giving of air on obverse level


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


Mode of giving of air in foot wells


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


Mode обдува glasses for the purpose of condensate removal


On page back
5.8. Air lines of distribution of air submitted to salon
On the following page
5.10. A design of a refrigerator path of a central air of air