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US 11,674,466 B2Granted
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.
Claims18
A method, comprising:
- monitoring, via one or more controllers, a current of an electrically-actuated solenoid valve, wherein the electrically-actuated solenoid valve is included in an engine and the current is a measured current;
- filtering, via a low-pass filter, the current, wherein the current is filtered responsive to a fueling request being initiated, an engine temperature being within a predetermined temperature range, and a threshold duration having elapsed since last determining a closing time of the electrically-actuated solenoid;
- and
- determining, via the one or more controllers, the closing time of the electrically-actuated solenoid valve based on a comparison of the measured current and the filtered current, the comparison of the measured current and the filtered current comprising determining an absolute difference between the measured current and the filtered current.
1 more element
A method for an engine, the method comprising:
- opening a solenoid valve coupled to a current sensor;
- measuring a current with the current sensor, the current being a measured current;
- filtering the current with a low-pass filter, wherein the current is filtered responsive to a fueling request being initiated, an engine temperature being within a predetermined temperature range, and a threshold duration having elapsed since last determining an inflection point of the measured current;
- comparing the measured current to the filtered current to determine the inflection point of the measured current, the comparison of the measured current and the filtered current comprising determining an absolute difference between the measured current and the filtered current;
- and
- adjusting one or more engine operating conditions based on the inflection point.
3 more elements
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, the sampling data being measured sampling data;
- process the sampling data with a low-pass filter to obtain filtered sampling data, wherein the sampling data comprises a plurality of current measurements and the sampling data is filtered responsive to a fueling request being initiated, an engine temperature being within a predetermined temperature range, and a threshold duration having elapsed since last determining a closing point of the fuel injection valve;
- determine the closing point of the fuel injection valve based on a comparison of the measured sampling data and the filtered sampling data, the comparison of the measured sampling data and the filtered sampling data comprising determining an absolute difference between the measured sampling data and the filtered 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.
6 more elements
Dependencies are inferred from the claim text.