Method and apparatus for characterizing fuel injector performance to reduce variability in fuel injection
AssigneeDelphi Technologies, Inc.
InventorsKevin R. Keegan, Ronald J. Krefta
Life of this patent
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Abstract
A method for equalizing fuel injector flows among a plurality of fuel injectors in an internal combustion engine including the steps of a) characterizing the electrical and/or mechanical performance of each fuel injector; b) imprinting characterization data on each fuel injector; c) reading the imprinted data into a control computer, preferably at the time of engine assembly or sub-assembly; and d) using the characterization data in an algorithm to adjust at least one electrical parameter such as hold current, peak current, and boost time for each fuel injector in an assembled engine during each fuel injection cycle.
Claims13
A method for equalizing fuel injector flows among a plurality of fuel injectors in an internal combustion engine, comprising the steps of:
- a) determining characterization data based on the performance of an at least one fuel injector;
- and
- b) using said characterization data to adjust at least one electrical parameter of said at least one fuel injector.
An internal combustion engine comprising a plurality of direct injection fuel injectors controlled by an engine control module,
- wherein at least one of said plurality of fuel injectors is characterized for at least one of electrical and mechanical performance,
- wherein said engine control module is programmed with data representing said characterization, and
- wherein said engine control module controls said fuel injectors in accordance with at least one algorithm employing said data.
Dependencies are inferred from the claim text.