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Ignition system

Ignition system


The Motronic 4.1's ignition system is a conventional inductive ignition system with ignition coil, distributor and HT cables. The firing order is 1-3-4-2.

Incorporated in the distributor is a camshaft position sensor (Hall effect sensor) which, by means of a field rotor fcompression.

In connection with shifting up or down on cars with automatic transmission, the ignition is retarded by 12° in order to limit torque.

Ignition timing

Ignition timing is calculated by the control module chiefly on the basis of the following information:



engine load

Engine speed

knocking, if any

throttle position (idling only).