CITROEN CX 2000 Repair Manual page 154

OPERATION No MA. 210-W 0 : Ch araclcrislics ~3rd spcial /W~~NWS
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thr d~~fmt~i~ Op. MA. 210-00 a 1
ipith syslwn.
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M 23/622
ENGINE
TRANSISTORISED IGNITION WITH ELECTROMAGNETICALLY CREATED IMPULSES
$ OPERATING PRINCIPLE
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The electronic ignition comprises a coil ( 1 1. (I transistorised module ( 2) which includes among other components.
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a power transistor working as a contact breaker. and a distributor (3 1 with a magnetic pick-up ( impulse generator )
and an H.T. rotor.
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The primary current from the coil goes through a switching transistor situated in the module ( the earthing is carried
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out via the fixing bracket for the coil mrd module assembly ).
As an impulse is created by the sensor in the distributor. it switches off the transistor and thus cuts off the flow
of current in the coil primhry circuit. which causes a (< High Tension 1) current in the coil secondary circuit.
The module is located in the distributor..replocinq the contact breaker unit in a conventional ignition system. It
comprises a sensor (4) and a 4-point star ( 5 ).
The,sensor has a permanent moqnet inside a winding. This windinq is connected electrically to the module
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The 4-point star is made of metal. and has one star per cylinder. It is fitted in place of the rotor mm cam in (I
conventional ignition system.