Method and apparatus to control fuel metering in an internal combustion engine

A system for controlling fuel delivery through a fuel injection system of an internal combustion engine, comprising:

• an internal combustion engine, comprising:
• a plurality of cylinders,
• an air intake system with a plurality of intake runners, each intake runner corresponding to one of the plurality of cylinders and fluidly attached thereto, and,
• a fuel injection system comprising a plurality of fuel injectors, each fuel injector fluidly connected and operable to deliver a quantity of fuel to one of the plurality of intake runners, and operably connected to an engine controller;
• wherein the engine controller is operable to:
• calculate a mass of fuel for delivery to one of the plurality of cylinders through one of the plurality of fuel injectors, based upon the operation of the internal combustion engine,
• determine gas temperature in the cylinder;
• select a compensation term based upon the calculated mass of fuel and the determined gas temperature in the cylinder;
• adjust the calculated mass of fuel using the compensation term;
• and,
• control an open time of each fuel injector based upon the adjusted calculated mass of fuel, such that the adjusted calculated mass of fuel is delivered to the one of the plurality of cylinders.