Method for changing fuel delivery rate for hydrogen fuelled internal combustion engine

摘要

A method for changing the fuel delivery rate for a hydrogen fuelled internal combustion engine having pulsed fuel injectors including, for each cylinder, a low flow fuel injector and a high flow fuel injector, comprises the steps of: increasing the fuel delivery rate by increasing the pulse width of the low flow injector until the flow rate has reached an overlap value; operating the high flow injector at a rate approaching the overlap value; and simultaneously decreasing the pulse width of the low flow injector such that the total flow from the high and low flow injectors is equal to the maximum flow from the low flow injector. The method may further comprise the steps of decreasing the fuel rate from a higher fuelling rate by decreasing the pulse width of the high flow rate injector until the flow rate has reached the overlap value; and simultaneously operating said low flow injector at the overlap value, while turning said high flow injector off.