California

Digifant I Engine Management System:

The Digifant I TCI-h [1] ignition system ignites the air/fuel mixture in the combustion chamber to provide optimal performance, driveability and minimal emissions.
This system incorporates mechanical components for the distribution and electronic components to control the ignition timing.


OPERATION
As the distributor shaft turns, the Shutter wheel (mounted to the shaft) induces a signal in the Hall-effect sender. The signal is sent to the Digifant I electronic control unit which uses various input devices to calculate the precise ignition timing signal. The timing signal is used by the Digifant I control unit to switch the coil primary circuit. This releases a precisely timed high voltage pulse, that flows through the coil wire to the distributor. The distributor rotor directs the voltage pulse, via the distributor cap, to the correct spark plug wire. At the spark plug it jumps a gap to reach engine ground. When the voltage pulse jumps the gap to ground, it creates a spark (ignition spark) strong enough to ignite the air/fuel mixture in the combustion chamber.

Digifant I Engine Management System:

COMPONENTS OR SIGNALS
The Digifant I TCI-h ignition system in this vehicle uses the following components or signals:

NOTE: Some ignition related components or signals may be covered in a different section.

^ Cap and static shield
^ Coil wire
^ Distributor
^ Hall effect sender
^ Ignition coil power stage
^ Ignition coil
^ Digifant I electronic control unit
^ Knock sensor signal
^ Rotor
^ Spark plug wires
^ Spark plugs



[1] BOSCH TCI-h stands for:
BOSCH = manufacturer
T = transistorized
C = coil
I = ignition
h = hall-effect sensor