Patent ID: 9518516
Filing Date: 2016-12-13
CPC Classification: F02B,F02D,Y02T

Claim Text:
1. A method of controlling the amount of diesel fuel delivered to a dual-fuel internal combustion engine, the engine being fueled with both gaseous fuel and diesel fuel, comprising: receiving a signal from the operator of the engine representing a desired torque; determining a desired intake manifold pressure and a desired intake manifold oxygen fraction, based on the desired torque; controlling flow actuators for at least the intake air flow and the intake gaseous fuel such that the desired intake manifold pressure and the desired intake manifold oxygen fraction will occur; receiving sensor data from which the engine speed and a current in-cylinder state can be measured or estimated; wherein the current in-cylinder state comprises at least an in-cylinder amount of gaseous fuel and an in-cylinder amount of oxygen; determining a current amount of diesel fuel based at least on the desired torque, the engine speed and the current in-cylinder state; and generating a diesel fueling command representing the current amount of diesel fuel.