×

Water/fuel ratio control using complementary filtering between valve and flowmeter feedback signals

  • US 10,119,705 B2
  • Filed: 04/15/2016
  • Issued: 11/06/2018
  • Est. Priority Date: 04/15/2016
  • Status: Active Grant
First Claim
Patent Images

1. A method for determining fuel supplied to an engine comprising:

  • receiving, by a controller, a first signal;

    receiving, by the controller, a second signal, wherein a response bandwidth frequency of the first signal is less than the response bandwidth frequency of the second signal;

    subtracting, by the controller, the second signal from the first signal to create an error signal;

    lagging, by the controller, the error signal to create a lagged error signal using a first-order filter utilizing a time constant;

    adding, by the controller, the lagged error signal to the second signal to create a compensated signal;

    receiving, by the controller, a switch control signal, the compensated signal, and the second signal;

    determining, by the controller, the controller implementing a switch logic, whether to send at least one of the compensated signal or the second signal;

    sending, by the controller, at least one of the compensated signal or the second signal to a water-fuel ratio system.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×