Patent ID: 8478509
Filing Date: 2013-07-02
Classification: F02D

Abstract:
1. A supplemental control circuit for a fuel injector having a coil, the supplemental control circuit comprising: an electronic switch adapted to be connected to the fuel injector coil, said electronic switch being operable to control the flow of an electric current through the fuel injector coil; an energy storage device adapted to be connected to the fuel injector coil, an electronic switching circuit having an input port connected to said energy storage device and an output port adapted to be connected to a voltage control port on an engine control unit; and a microprocessor connected to said electronic switch and also adapted to be connected to said engine control unit voltage control port, said microprocessor responsive to a change in condition at said engine control unit voltage control port to supply a voltage having a modified pulse length to said fuel injector coil, said electronic switch responsive to a further change in condition at said engine control unit voltage control port to cause said energy storage device to supply energy stored within said energy storage device to said engine control unit voltage control port to simulate the duration of a normal fuel injector control pulse.