Audi A4, S4

Since 2000 of release

Repair and car operation



Audi A4, S4
+ Introduction
+ Controls and receptions of safe operation
+ Current leaving and service
+ The engine
+ Systems of cooling, heating and the air conditioner
- Power supply systems, release and decrease in toxicity of the fulfilled gases
   + Power supply systems of petrol and diesel engines
   - System of injection of fuel of the petrol engine
      The general data and security measures
      Functioning of a control system and injection of the petrol engine
      The general check of system of injection of the petrol engine
      Check and adjustment of number of turns of a single course/moment of ignition/concentration WITH
   + System of injection of fuel of the diesel engine
   + Systems of release and decrease in toxicity of the fulfilled gases. turbocharger
+ Systems of an electric equipment of the engine
+ Manual box of a gear change
+ Automatic transmission
+ Coupling, power shafts and differential
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment



System of injection of fuel of the petrol engine

The general data and security measures

The system of electronic control by engine work regulates process of distribution of fuel and process of ignition of a fuel mix. The electronic control system allows:

  • Precisely to dose out quantity of injected fuel in any operating conditions of the engine that provides the low expense of fuel at optimum road performance of the car.
  • To reduce the maintenance of harmful substances in the fulfilled gases owing to exact measurement of quantity of fuel and application regulated каталитического the converter.
  • To spend self-diagnostics for fast troubleshooting. The system is equipped by memory of malfunctions. If in the course of work there are malfunctions, they register in memory. If the engine works not optimum, the list of malfunctions can print HUNDRED if necessary to eliminate damage independently.

The engine management block represents the small, high-speed computer. He establishes optimum time of ignition, the moment of injection of fuel and quantity of injected fuel. Thus there is a coordination of action of the block of management with other systems of the car, for example, management of a transmission or blocking from stealing.

Elements of system of ignition and injection keep for a long time the working capacity and practically do not demand service. Within the limits of maintenance service carrying out it is necessary to make only replacement of an element of the air filter, and also to replace spark plugs. More serious works on adjustment and repair can be made only by means of special devices.

Security measures at work with system of injection of the petrol engine

  • Do not use open fire, do not smoke, do not hold near to a workplace of any heated or very hot details. There is a danger of accident! Keep in readiness the fire extinguisher.
  • Watch good ventilation of a workplace. Fuel steams are poisonous.
  • The fuel system is under pressure! Before dismantling шланговых connections dump pressure of fuel, address to Razdelu Sbrasyvanie of pressure in fuel system.
  • At dismantling шланговых connections from reasons of safety it is necessary to cover connection with a thick rag.

At work with elements of system of injection it is necessary to observe also the general safety rules and the cleanliness observance, the General data described in Section and security measures.

Elements of a control system of the engine keep for a long time the working capacity and practically do not demand service. Within the limits of maintenance service carrying out it is necessary to replace only an element of the air filter and the fuel filter.