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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mercedes-Benz E-Class W123 (from 1976 to 1985, the year of issue)

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Mercedes-Benz W123
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Mercedes-Benz
W123
Introduction
Gasoline engines
Design and specifications
Engine adjustment
Ignition system
Contact ignition system
Contactless system of ignition
Device features
Operating principle
Removal and installation of the gauge-distributor
Replacement of the proximity sensor, ignition distributor
Checking the ignition gauge-distributor
Removal and installation of the gauge of VMT
Installation of the moment of ignition
Power system
The fuel injection system K-Jetronic
The fuel injection system L-Jetronic
Works by car
Work on the engine M 102
Work on the engine M 110 and M 123
Coupling
Manual transmission
Automatic Transmission
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A steering
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Operating principle



Ignition system contactless, constant efficiency, supplies a high voltage to the spark at all engine operating modes.

The system includes a sensor-distributor with integrated Hall generator, a switch and a special ignition coil.


Details gauge-distributor ignition engines M 102

1 - body
2 - fixed screen with teeth
3 - induction coil
4 - movable screen with teeth

5 - a vacuum regulator
6 - shield
7 - a rotor
8 - Cover


Driving joining beam ignition wires

The principle of operation of the pulse generator Hall

According to the semiconductor passes control current coming from the connecting wires "A" and "B". When the magnetic field "H" intersects a plane perpendicular poleprovodniku between electrodes "E" and "F" potential difference. This phenomenon is referred to as the Hall effect.

Generator Hall sensor integrated in the Distribution. It consists of a stationary (magnetic barrier) and movable (rotor) elements.

Magnetic barrier consists of a screen mounted on the permanent magnet and the Hall sensor or Hall IC chip placed against a magnet on a ceramic holder.

The rotor has four teeth corresponding to the number of cylinders of the engine. When the rotor teeth pass through the gap between the magnet and a Hall sensor. When a tooth is in the gap, the magnetic field is deflected and the Hall effect sensor is interrupted. With his disappearance trigger the transistor becomes conductive and passes the primary current of the ignition coil. Upon exiting from the tooth gap reappears and the magnetic field of the primary current flow is terminated, which gives rise, as in the conventional ignition coil, high voltage going to the spark plugs.

The width of each tooth corresponds to the angle of the cam, i.e. this angle remains unchanged and does not need to be adjusted.

As usual sensor-distributor, electromagnetic sensor-distributor includes centrifugal and vacuum regulators.

Not be replaced by a rotor sensor-distributor others with different resistance.





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Removal and installation of the gauge-distributor

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