Patent ID: 7011070
Filing Date: 2006-03-14
Classification: F02B,Y02T

Abstract:
1. A method of reducing soot produced during combustion of a fuel directly injected in a combustion chamber of an operating internal combustion engine, said method comprising: (a) introducing 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 to yield a compressed intake charge having a composition; (c) receiving a quantity of said intake charge into a reservoir through an orifice during said compression stroke of said piston; (d) directly injecting a fuel jet of said fuel into said combustion chamber; (e) burning said fuel in said combustion chamber during a power stroke of said piston; (f) during the power stroke, allowing a pressure gradient established between the reservoir and the combustion chamber to propel a charge jet of the intake charge through the orifice into the combustion chamber, said charge jet generating turbulence within the combustion chamber beyond 15 degrees after top dead center, the charge jet having a composition substantially the same as the composition of the compressed intake charge.