Methods and systems for fuel injector control
AssigneeTransportation IP Holdings, LLC
InventorDavid Zielinski
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for detection of a closing time for a solenoid valve. In one example, a method may include monitoring a current of the solenoid valve, filtering the current, and determining the closing time of the solenoid valve based on each of the current and the filtered current. In some examples, the solenoid valve may be an electrically-actuated fuel injection valve. In some examples, determining the closing time may include using the filtered current to determine an inflection point of the current.
Claims20
A method, comprising:
- monitoring a current of an electrically-actuated solenoid valve;
- filtering the current;
- and
- determining a closing time of the electrically-actuated solenoid valve based on each of the current and the filtered current.
A method for an engine, the method comprising:
- opening a solenoid valve coupled to a current sensor;
- measuring a current with the current sensor;
- filtering the current with a low-pass filter;
- comparing the measured current to the filtered current to determine an inflection point of the measured current;
- and
- adjusting one or more engine operating conditions based on the inflection point.
A vehicle system, comprising:
- a fuel injection pump in fluid communication with a fuel injector via a fuel injection valve;
- a sensor coupled to the fuel injection valve;
- and
- a controller communicably coupled to each of the fuel injection pump, the fuel injector, the fuel injection valve, and the sensor, the controller executing instructions in non-transitory memory to:
- receive sampling data from the sensor;
- process the sampling data with a low-pass filter;
- determine a closing point of the fuel injection valve based on the processed sampling data;
- and
- adjust operation of one or more of the fuel injection pump, the fuel injector, and the fuel injection valve based on the closing point.
Dependencies are inferred from the claim text.