Patent ID: 6158418
Filing Date: 2000-12-12
Classification: F02D,Y02T

Abstract:
A method for controlling the delivery of fuel to a plurality of cylinders associated with a dual fuel engine operating in a dual fuel mode, each cylinder including at least one gaseous fuel admission valve for delivering gaseous fuel to such cylinder, the method comprising the steps of:(a) selecting at least one cylinder of said plurality of cylinders;(b) sensing an actual detonation level of said at least one cylinder;(c) comparing the actual detonation level of step (b) to a predetermined detonation level;(d) determining a trim value based upon the comparison of step (c), said trim value being indicative of a gaseous fuel admission valve control signal duration adjustment factor;(e) applying the trim value of step (d) to a determined gaseous fuel admission valve control signal duration for said at least one cylinder to establish a trimmed gaseous fuel admission valve control signal duration;(f) delivering fuel to said at least one cylinder utilizing a gaseous fuel admission valve control signal having the trimmed gaseous fuel admission valve control signal duration of step (e); and(g) controlling the delivery of fuel to each of the remaining cylinders of the dual fuel engine in accordance with steps (a) through (f) for each remaining cylinder.