Distributors & Ignition Systems - DUCELLIER Electronic Ignition: Description

NOTE: Fuego Turbo models uses a Ducellier-Renault Electronic Ignition System with computer control. See appropriate article in this section

Ducellier electronic ignition system consists of a Ducellier breakerless distributor, a Delco-Remy ignition coil and electronic control unit, an ignition switch and necessary wiring.

The distributor contains both centrifugal and vacuum advance mechanisms. Dual pick-up versions (Le Car only) have both main and secondary impulse sender coils (pick-up coils).

Single pick-up versions (18i and Fuego) have a single impulse sender (pick-up coil). The distributor also contains a trigger plate (reluctor), seal, rotor, and cap. See Fig 1.

Fig 1: Exploded View of Le Car Distributor

Courtesy of AMERICAN MOTORS/RENAULT CORP.

18i and Fuego have only a main impulse sender coil.

The ignition coil and electronic control unit are mounted to a common support, that provides both good grounding and cooling of the electronic control unit. See Fig 2.

Silicone grease, which comes with each electronic control unit, is applied between the unit and support to provide improved heat transfer. Since both units are grounded through the common support base, all mounting bolts should be snug.

The ignition coil is encased in epoxy resin instead of oil. The electronic control unit receives, amplifies, and sends electronic signals to provide proper spark timing.

Fig 2: Ignition Coil and Electronic Control Unit Assembly

Courtesy of AMERICAN MOTORS/RENAULT CORP.