Info CDI TDR 250 pour modification

[fullgazlolo]

Dernier message de la page précédente :

T'emmerde pas Olivier... si ton bluetooth avec ses malheureux µW perturbait ton allumage... ton portable soufflerait la bougie!
Y a aucune raison pour ça.

[TZR-V4]

Suis pas inquiet pour l'allumage

c'était plus tôt pour la qualité de la communication....

[fullgazlolo]

Tant que ton module est "loin" de la HT et que tu as un antiparasite...

[Toop]

si ça intéresse quelqu'un :

Ignition Enhancement in a Two-Stroke Spark-Ignition Engine
SAE Paper # 951780
Published: 1995-09-01

ABSTRACT
Conventional two-stroke spark-ignition (SI) engines have difficulty meeting the ignition requirements of lean fuel- air mixtures and high compression ratios, due to their breaker- operated, magneto-coil ignition systems. In the present work, a breakerless, high-energy electronic ignition system was developed and tested with and without a platinum-tipped- electrode spark plug. The high-energy ignition system showed an improved lean-burn capability at high compression ratios relative to the conventional ignition system. At a high compression ratio of 9:l with lean fuel-air mixtures, the maximum percentage improvement in the brake thermal efficiency was about 16.5% at 2.7 kW and 3000 rpm. Cylinder peak pressures were higher, ignition delay was lower, and combustion duration was shorter at both normal and high compression ratios. Combustion stability as measured by the coefficient of variation in peak cylinder pressure was also considerably improved with the high-energy ignition system.

HIGH-ENERGY IGNITION SYSTEM

A circuit block diagram for the breakerless, high energy, capacitive-discharge ignition (CDI) system that was developed in the present work is shown in Figure 1. A schematic diagram of the timing of pluses at various stages in the ignition circuit is illustrated in Figure 2. A fixed signal at 60" before top-dead-center (TDC) from an optical-trigger pulse generator was used as the triggering signal for the ignition system. This signal was converted to transistor-transistor logic (TTL) levels and was delayed using a digital monostable multivibrator. The timing of the spark was varied by changing this delay. The width of the delayed trigger signal was varied using another monostable multi-vibrator that varied the spark duration. An opto-isolator and CDI driver were introduced to isolate the TTL, stage (low-voltage section) from the CDI unit (high-voltage section). This was to help prevent any damage to the ignition circuit by high-voltage spikes from the CDI unit. The resulting signal was used to trigger the CDI system. The start of the spark could be varied from 60" before TDC to TDC, and the spark duration could be varied by about 40" of crank angle.

[TZR-V4]

TOOP tu as le full paper ?

Si pas sur d'avoir au taff les abonnements SAE !!!

Sur mon CDI programmable c'est facile de faire une largeur d'impulsion variable mais le problème sera de mesurer l'impact...

L'auteur de l'article (je pense le responsable de la recherche) https://www.iitm.ac.in/info/fac/pvm

[Toop]

les torchons avec les torchons, les serviettes avec les serviettes -> à chacun sa peine => Bosse donc, je m'occupe du reste