Patent ID: 7213564

Claim:
A method of reducing soot generated by the combustion of a gaseous fuel directly injected into a combustion chamber of an internal combustion engine, said method comprising: (a) drawing an intake charge into said combustion chamber during an intake stroke of a piston, said piston partially defining said combustion chamber; (b) compressing said intake charge during a compression stroke of said piston; (c) directly injecting said gaseous fuel as a plurality of fuel jets towards spatially distinct locations throughout said combustion chamber; (d) igniting and burning said plurality of fuel jet, said plurality of fuel jets each defining a scan rich zone and an oxidation zone during burning; and (e) directing said soot rich zones onto an obstruction within said combustion chamber such that a ratio of a surface area of said oxidation zone against a volume of said soot rich zone increases during burning of said plurality of fuel jets.