The bi-fuel NG-Motronic ECU

This ECU is bas­ed on the Mo­tronic ver­sion for gas­oline in­jec­tion. It con­trols the CNG in­jec­tors via separate dri­ver sta­ges. The torque-guided con­trol permits the simple in­te­gra­tion of
the func­tions which are spe­cific for CNG opera­tion. A num­ber of ad­van­tages re­sult from inte­gra­ting both fuel systems in a bi-fuel ECU. For in­stance, low­er wir­ing costs, and cost sav­ings due to the sec­ond ECU be­com­ing un­nec­es­sary. In addi­tion, the sys­tem as a whole has con­sid­er­able op­timiza­tion po­ten­tial.

A fur­ther ad­van­tage in­her­ent in the sin­gle-ECU con­cept is the fact that at every op­erat­ing point a co­ordi­nated change can be made be­tween gas­oline and CNG op­era­tion without any jump in torque.