Method to Detect Partial Failure of Direct-Injection Boost Voltage
AssigneeContinental Automotive Systems, Inc.
InventorsNingsheng Qiao, Michael Cottrell, Francois Fabre
Life of this patent
Estimating the term…
Abstract
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.
Claims18
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.
A diagnostic method for a power supply circuit, the method comprising:
- employing a boost power supply that includes a dual path circuit for generating a voltage for powering a fuel injector;
- selectively applying the voltage to the fuel injector;
- monitoring a resultant electrical current flow through the fuel injector;
- and
- determining whether one path of the dual path circuit is defective based on the electrical current flow.
A power supply diagnostic circuit, comprising:
- switching power supply means for generating a voltage for powering a fuel injector;
- and
- injector control means for selectively applying the voltage to the fuel injector and monitoring a resultant electrical current flow through the fuel injector, wherein the switching power supply means includes a dual path circuit comprising two inductors, two MOSFETs, and two diodes, and the injector control means determines whether one path of the dual path circuit is defective based on the electrical current flow.
Dependencies are inferred from the claim text.