Method to Detect Partial Failure of Direct-Injection Boost Voltage

摘要

A power supply diagnostic circuit includes a switching power supply that generates a voltage for powering a fuel injector. An injector control module selectively applies the voltage to the fuel injector and monitors a resultant electrical current flow through the fuel injector. The switching power supply includes a dual path circuit comprising two inductors, two MOSFETs, and two diodes. The injector control module determines whether one path of the dual path circuit is defective based on the electrical current flow.

主权项

1. A power supply diagnostic circuit, comprising:
a switching power supply that generates a voltage for powering a fuel injector; and an injector control module that selectively applies the voltage to the fuel injector and monitors a resultant electrical current flow through the fuel injector, wherein the switching power supply includes a dual path circuit comprising two inductors, two MOSFETs, and two diodes, and the injector control module determines whether one path of the dual path circuit is defective based on the electrical current flow.