Patent ID: 6912992
Filing Date: 2005-07-05
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A method of introducing a pilot fuel into a cylinder of an operating internal combustion engine, said engine having a piston disposed within said cylinder, said method comprising: (a) monitoring a set of engine parameters; (b) determining engine load and engine speed from said set of engine parameters; (b) introducing a first quantity of a first gaseous fuel into said cylinder and an intake charge into said cylinder; (c) at a pilot fuel timing, introducing a pilot fuel quantity of said pilot fuel at said pilot fuel timing into said cylinder so that it ignites when said piston is at or near top dead centre of the compression stroke, said pilot timing avoiding a excessive knocking range during a compression stroke of said engine; wherein said first quantity and said pilot fuel quantity and said pilot fuel timing are controllable in response to at least one of engine load and engine speed, said first quantity forming a premixed charge of fuel and air prior to ignition of said pilot fuel.