Ignition system

F - Mech Eng,Light,Heat,Weapons – 02 – P

Patent

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Details

F02P 3/04 (2006.01) F02P 1/08 (2006.01) F02P 3/045 (2006.01) F02P 7/07 (2006.01) F02P 11/00 (2006.01) F02F 7/00 (2006.01)

Patent

CA 2223429

A modular electronic ignition system for use in internal combustion engines is provided using latching Hall effect sensing devices (HA1-HA4). Two permament magnets (N,S) are affixed to a non-ferrous member (MA) mounted to the camshaft (CS) which extends through a seal in the timing cover (TC). A sensing module including the Hall effect devices (HA1-HA4) is arranged annularly or angularly about the magnet containing member (MA) and senses the magnetic field as the magnets pass the Hall effect devices. Dwell time is controlled by the angular distance at which the magnets (N,S) are placed from each other. The output of the Hall effect devices (HA1-HA4) drives application specific integrated circuits (CD1) which provide low level switching of ignition coil primaries. The modular design allows for a low part count, a simplified EMI shielding arrangement and easy removal and replacement of system components.

Système d'allumage électronique modulaire à utiliser dans les moteurs à combustion interne, avec dispositifs détecteurs à effet Hall à verrouillage (HA1-HA4). Deux aimants permanents (N,S) sont fixés sur un élément non ferreux (MA) monté sur l'arbre à cames (CS), lequel s'étend à travers le joint du couvercle du dispositif de réglage (TC). Un module de détection comportant les dispositifs à effet Hall (HA1-HA4) est disposé de façon annulaire ou angulaire autour de l'élément à aimants (MA); il détecte le champ magnétique au moment où les aimants passent devant les dispositifs à effet Hall. Le temps de maintien est commandé par la distance angulaire entre les aimants (N,S). Les données communiquées par les détecteurs à effet Hall (HA1-HA4) commandent des circuits intégrés à application spécifique (CD1) qui assurent une commutation à niveau bas des enroulements primaires d'allumage. La configuration modulaire permet d'avoir un petit nombre de pièces, un dispositif de blindage anti-induction simplifié et facilite le retrait et le remplacement des composants du système.

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