Ford Sierra

1982-1993 of release

Repair and car operation



Ford Siyerra
+ 1.2. Car identification
+ 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.
         3.1.4.1. OHC engine
         - 3.1.4.2. Dm3 CVH 1,8 engine
            + 3.1.4.2.1. Technical characteristics
            3.1.4.2.2. Engine adjustment
            3.1.4.2.3. Ignition system
            3.1.4.2.4. Gazoraspredeleniye system
            3.1.4.2.5. Assembly of the CVH 1,8 engine of dm3
         + 3.1.4.3. DOHC engine
         + 3.1.4.4. Service and repair
         + 3.1.4.5. Coupling
         3.1.4.6. Mechanical five-speed transmission of type N
         + 3.1.4.7. Mechanical five-speed transmission of MT 75 type
         3.1.4.8. Automatic transmission
         3.1.4.9. Forward suspension bracket
         + 3.1.4.10. Brake system
         + 3.1.4.11. Electric equipment
         3.1.4.12. General data
      + 3.1.5. Changes in a car design with 1990 till 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





3.1.4.2.3. Ignition system

GENERAL INFORMATION

Elements of system of ignition of the CVH engine of 1,8 dm of the sq. R2A type

1–a pulley of a maple belt of a cranked shaft with a gear wreath,
2–sensor of situation and number of turns of a cranked shaft,
3–drive of the distributor of ignition,
4–bolt of fastening of a drive,
5–arm of the distributor of ignition,
6–rotor of the distributor,
7–distributor cover

Functioning principle

The electronic module of management of ignition of ESC receives signals from the sensor of situation and number of turns, the sensor of temperature of cooling liquid, the sensor of temperature of arriving air and the vacuum sensor in an inlet collector.

On the basis of these signals, and also the card of optimum angles of an advancing of ignition under various operating conditions of the engine, written down in memories, the microprocessor ESC module operates a current in primary winding of the coil of ignition, defining the moment of interruption of a current in primary winding of the coil depending on the received signals. The high-tension current moves via the ignition distributor to wires of spark plugs.

Then the module includes a current in primary winding on strictly certain period and process repeats again, and the corner of an advancing of ignition changes the module depending on received information.

The module of management of ignition of ESC carries out the following functions:

  – defines number of turns of the engine depending on a period which passes between the next impulses generated by teeths of a wreath by moving in front of the sensor of situation and number of turns (a double cut) between teeths of a wreath defines the provision of a cranked shaft 45 ° before VMT);
  – defines vacuum in the inlet collector, testifying to degree of loading of the engine;
  – on the basis of received information and the data containing in memory, defines optimum under these operating conditions a corner of an advancing of ignition;
  – switches on and off a current in primary winding of the coil of ignition, causing formation of the high voltage creating a spark of ignition.

Electric circuit of an electronic operating contour of system of ignition of the ESC type

1–ESC module,
2–relay of a starter,
3–generator,
4–starter,
5–electromagnetic valve of a damper of the lever of a butterfly valve (dash-pot),
6–switch of ignition,
7–the sensor of temperature of cooling liquid,
8–sensor of temperature of the arriving
air,
9–sensor of situation and number of turns of a cranked shaft,
10-accumulator,
11-coil of ignition,
12,13-sockets of wires of the proof-reader of octane number of fuel,
14-diagnostic socket

The ESC module, besides, operates the engine putting in action a butterfly valve of the carburetor in a range of idling, correcting its situation depending on loading (automatic transfer is included, conditioning is included) and a thermal condition of the engine.

Check of system of ignition

The system of ignition does not demand adjustment. Removal and installation of the distributor of ignition does not represent great difficulties (see fig. Elements of system of ignition of the CVH engine of 1,8 dm of the sq. R2A type) as it can be established only in one, the correct situation.

The distributor of ignition is checked by means of a multimeter. The method of check is given in the table concerning check of system of ignition.

Method of check of system of ignition of ESC
Checked element
Measurement between contacts
Value
Remarks
Connection of a case with weight
"9" and weight
"10" and weight
0–0,5 Ohm
Ignition is switched off
Starter relay
"11" and weight
12-14 In
Ignition is included
Electromagnetic valve of a damper of the lever of a butterfly valve (dash-pot)
"12" and weight
12-14 In
Ignition is included
The sensor of temperature of cooling liquid
"26" and "27"
Ignition is switched off
The sensor of temperature of arriving air
"15" and "26"
Ignition is switched off
Sensor of situation and number of turns of a cranked shaft
"22" and "23"
Ignition is switched off
Power supply of primary winding of the coil of ignition
"8" and "9"
12-14 In
Ignition is included
Proof-reader of octane number of fuel
"25" and "9"
"24" and "9"
Resistance infinitely big
Before check to disconnect the ESC module; ignition is included