Ford Sierra

1982-1993 of release

Repair and operation of the car

Ford Siyerra
+ 1.2. Identification of the car
+ 2. Maintenance
- 3. General data
   - 3.1. Cars with petrol engines
      3.1.1. Masses and transfer numbers
      3.1.2. Operational liquids
      + 3.1.3. Changes in a car design from 1984 to 1986.
      - 3.1.4. Changes in a car design from 1987 to 1989. OHC engine
         + Dm3 CVH 1,8 engine
         + DOHC engine
         - Service and repair
   System of ignition
   System of injection
   Scheme of the EES IV system of the DOHC 2,0 engine of dm3
   Check and adjustment of the EEC IV system
   Elimination of malfunctions
   Check of elements of the EEC IV system
   System of gas distribution
   Head of the block of cylinders of the engine
   Dismantling of the engine
   Assembly of the engine
   Lubrication system
         + Coupling Mechanical five-speed transmission of N type
         + Mechanical MT 75 five-speed transmission Automatic transmission Forward suspension bracket
         + Brake system
         + Electric equipment General data
      + 3.1.5. Changes in a car design from 1990 to February, 1993.
   + 3.2. Cars with diesel engines
+ 4. Engines
+ 5. Coupling
+ 6. Transmissions
+ 7. Driveshaft and back bridge
+ 8. Steering
+ 9. Suspension brackets
+ 10. Brake system
+ 11. Body
+ 12. Electric equipment

- System of injection


Elements of system of injection Ford Motorcraft EFI of the DOHC engine

1 – inlet collector,
2 – case of a butterfly valve,
3 – the air supply pipeline to the idling regulator,
4 – sensor of temperature of cooling liquid,
5 – the sensor of temperature of the arriving air,
6 – fuel pressure regulator,
7 – fuel temperature sensor,
8 – collector of nozzles,
9 – laying of nozzles,
10 – fuel nozzles,
11 – idling regulator,
12 – damper of fluctuations of air,
13 – cover of the air filter,
14 – the replaced element of the air filter,
15 – case of the air filter.

Design and principle of action

In electronic multipoint system of injection Ford Motorcraft EFI the fuel given under constant small pressure goes to four nozzles which inject it on inlet the valve. The amount of the sprayed fuel is regulated by time of opening of nozzles determined by the EEC IV electronic control unit on the basis of the speed of the engine and size of course of the air consumed by the engine.

The electric fuel pump shipped in a tank forces constantly fuel through the pipeline to the fuel filter, the regulator of pressure (6), a collector of nozzles (8) and nozzles (10). The regulator of pressure supports constant pressure for this depression in an inlet collector.

The amount of the fuel given to each cylinder is regulated by time of opening of a nozzle falling on each cycle of operation of the cylinder.

The electronic EEC IV actuation device defines this time on the basis of the following signals:

  – the sensor (5) of temperature of the arriving air;
  – the sensor of speed of the engine located in the ignition distributor;
  – sensor (4) cooling liquids;
  – the sensor of provision of the butterfly valve located in a case of a butterfly valve (2);
  – the sensor of position of the lever of gear shifting of the automatic transmission (in cars with the automatic transmission);
  – the sensor of turning on of the compressor of the conditioner (in cars with conditioning).

On the basis of these signals the electronic EEC IV actuation device provides composition of mix of fuel, optimum for these operating conditions of the engine, and air.

Besides it operates the valve of the regulator (11) of idling which corrects idling speed by means of supply of additional air via the pipeline (3). In the course of start of the engine the valve of the regulator of idling is open as much as possible.

In no-load time its opening changes depending on requirement, keeping the constant speed of the engine.