Repair and TOYOTA 4-RUNNER car operation - 5.10. System of electronic injection of fuel (EFI system)//Toyota of 4Раннер 1987-1998 / svetodesigner.ru

Toyota 4 Runner/Hilux/Surf

1987-1998 of release

Repair and car operation



Toyota 4Раннер
+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engines
+ 4. Systems of heating, ventilation
- 5. Fuel and exhaust systems
   5.1. Specifications
   5.2. Order of a decompression of fuel system
   + 5.3. Fuel pump and pressure of fuel
   5.4. Hoses and connections
   5.5. Fuel tank
   5.6. Fuel pump
   5.7. Fuel level sensor
   5.8. Air filter
   5.9. Butterfly valve cable
   - 5.10. System of electronic injection of fuel (EFI system)
      5.10.1. EFI system check
   + 5.11. Units of system of injection of fuel
   5.12. Service of an exhaust system
   + 5.13. System of decrease in toxicity of exhaust gases
+ 6. Transmissions
+ 7. Transmission elements
+ 8. Brake system
+ 9. Suspension bracket and steering
+ 10. Body
+ 11. Electric equipment
+ 12. Electroschemes



5.10. System of electronic injection of fuel (EFI system)

GENERAL INFORMATION

Units of system of electronic injection of fuel of 4-cylinder engines

1. Zolotnik of ventilation of a case
2. Distributor of fuel and nozzle
3. Sensor of an angle of rotation of a butterfly valve
4. Retsirkulyatsiya sensor
5. Leveling chamber
6. Diagnostic socket
7. Assembly block
8. Pneumoshock-absorber
9. Regulator of pressure of fuel
10. Air filter
11. Sensor of speed of a stream

Units of system of electronic injection of fuel of engines of V6 3,4 l

1. Air filter
2. Sensor of speed of a stream
3. Sensor of an angle of rotation of a butterfly valve
4. Retsirkulyatsiya sensor
(under the leveling chamber)
5. Leveling chamber
6. Regulator of pressure of fuel
7. Diagnostic socket
8. Assembly block

Cars are equipped with system of electronic injection of fuel (EFI system) into which three subsystems enter:

  – fuel system;
  – system of a fence of air;
  – electronic control system.

FUEL SYSTEM

The fuel pump located in a tank, provides supply of fuel under constant pressure in the distributor from which fuel is evenly distributed on nozzles. From the distributor fuel moves to inlet canals of cylinders through nozzles. The amount of injected fuel is strictly supervised by the electronic control unit (ESM-blokom). The regulator of pressure of fuel provides change of pressure of fuel according to depression on a soaking-up collector.

SYSTEM OF THE FENCE OF AIR

The system of a fence of air consists of the air filter, the chamber of a butterfly valve and the channel connecting these two units. The sensor air temperatures (IAT sensor) traces temperature of sucked-in air. The signal from the sensor arrives on the electronic control unit which provides a dosage of injected fuel according to air temperature. A butterfly valve the driver operates. In process of opening of a butterfly valve speed of arriving air that leads to fall of its temperature increases. The sensor registers change of air temperature and gives a signal on the ESM block which in turn gives a signal on nozzles.

ELECTRONIC CONTROL UNIT (ESM-BLOK)

Management of electronic injection of fuel and other systems is provided with the processor block. The structure of the block includes a microcomputer. On the control unit signals from a number of sensors which trace such parameters as air temperature on an entrance in cylinders, an angle of rotation of a butterfly valve arrive, etc. On the basis of these data the control unit defines duration of injection of fuel at which maintenance of an optimum ratio of gasoline and air in gas mixture is provided.