A control system and method for a bi-fuel engine

A control system (14) for a bi-fuel engine (12) is disclosed having a powertrain controller (52) and a bi-fuel controller (50). The controller (52) has a set of fuel injector drivers (92) and the controller (50) has a set of conventional fuel injector drivers (104) and a set of alternate fuel (AF) fuel injector drivers (106). Each of drivers (92) in the controller (52) is electrically connected to the two drivers (104) and (106) in controller (50) so that a control signal generated by a single driver (92) can be utilized by either of drivers (104,106) to generate a corresponding control signal for controlling a conventional fuel injector (38) or an alternate fuel AF fuel injector (40).