Patent ID: 6443108
Filing Date: 2002-09-03
Classification: F02B,F02F,Y02T

Abstract:
A method of operating an internal combustion engine, said engine has at least one cylinder in which a fuel injector is disposed, said method comprising the steps of:inducting air into the cylinder of the engine; compressing said air during a first engine compression stroke; providing a first amount of a fuel to said air; combusting said first amount of said fuel in said air by a first combustion, said first amount of fuel is an amount which when mixed with said air causes contents of the cylinder to have an air-fuel ratio which is leaner than stoichiometric; expanding and compressing products of said first combustion during a subsequent expansion and compression stroke; providing a second amount of said fuel to said products of said first combustion, said second amount of said fuel is an amount which when mixed with said products of said first combustion causes contents of the cylinder to have an air-fuel ratio which is substantially stoichiometric; and combusting said second amount of said fuel by a second combustion.