초록 ▼

Apparatus and method, particularly suited for a work machine, provides EGR to an internal combustion engine without the addition of special EGR hardware. The invention provides a controlling of a timing of the closing of a first exhaust valve during the exhaust stroke of a first cylinder to trap exh

Apparatus and method, particularly suited for a work machine, provides EGR to an internal combustion engine without the addition of special EGR hardware. The invention provides a controlling of a timing of the closing of a first exhaust valve during the exhaust stroke of a first cylinder to trap exhaust gas in the first cylinder for mixing with combustion air in the first cylinder during the intake stroke.

대표청구항 ▼

1. A work machine having a frame, said work machine comprising:an internal combustion engine attached to said frame; a block being a part of said internal combustion engine, said block defining a plurality of combustion cylinders, said plurality of combustion cylinders having a first cylinder having

1. A work machine having a frame, said work machine comprising:an internal combustion engine attached to said frame; a block being a part of said internal combustion engine, said block defining a plurality of combustion cylinders, said plurality of combustion cylinders having a first cylinder having at least an exhaust stroke and an intake stroke; a cylinder head being a part of said internal combustion engine, said cylinder head being in fluid communication with said first cylinder, said cylinder head having a first exhaust valve corresponding to said first cylinder and a first intake valve corresponding to said first cylinder; an intake manifold being a part of said internal combustion engine, said intake manifold being fluidly connected to said plurality of combustion cylinders to supply combustion air thereto; an exhaust manifold being a part of said internal combustion engine, said exhaust manifold being fluidly connected to said plurality of combustion cylinders to receive exhaust gas therefrom; and an apparatus which controls a timing of the closing of said first exhaust valve during said exhaust stroke of said first cylinder to trap exhaust gas in said first cylinder for mixing with said combustion air in said first cylinder during said intake stroke, said apparatus controlling an opening and a closing of one of said first intake valve during said exhaust stroke of said first cylinder and said first exhaust valve during said intake stroke of said first cylinder.