What is the difference between cdi and tci

Ignition is possible even without a battery connection Stable ignition is possible up to high RPM range Built-in electrolytic capacitor for kick-start Compatible with all types of control, such as ignition and vehicle load controlled by onboard CPU Using our own step-up transformers, diodes and thyristors to offer high reliability at a low cost. CDI circuit structure. Relation Contents Application Introductions to fields in which Shindengen products are used. This is WHY advancing the ignition with an offset woodruff key, or slotting the pickup coil gives immediate results.

CDI ignition coils sit there, with NO voltage in the primary circuit, until the CDI sends a pulse of hundreds of volts through the primary to ground. A CDI box of the same vintage as ours has the same kind of logic as ours.

When the pickup coil sends a signal, the CDI's logic says 'when' and it dumps that charge of hundreds of volts through the coil's primary windings. CDI powered coils also can be used in higher rev situations because the coil isn't dependent on time to build up inductance in the secondary coils, it is amplitude dependent. CDI therefore offers consistent spark voltages as high as you want to rev. TCI powered ignitions are dependent on time.

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It may not display this or other websites correctly. You should upgrade or use an alternative browser. Thread starter Graham Woolnough Start date Dec 3, Status Not open for further replies. Graham Woolnough New Member. Dear Tech Folk, I have a horizontally opposed 2 cylinder 2 stroke. It fires the ignition on both cylinders the same time. At present has a TCI system with 2 internal coils degrees opposed with 2 magnets in the flywheel opposite one another.

Spark is triggered when the current is cut suddenly. Spark duration may be longer. The ECU then cuts the 12V power to the primary coil on and off to build and collapse the primary coil magnetic field, inducing a voltage in the secondary that then goes to the spark plug. BUT, the service manual says the primary coil resistance is only 0. It appears to work, though. Perhaps they beefed up the primary coil to take the extra current?