Direct-injection internal combustion engine with outwardly opening injection nozzle, and method for operating an internal combustion engine of said type

摘要

A direct-injection engine having a cylinder in which a combustion chamber is jointly formed by a piston crown of a piston, which is movable along the longitudinal axis of the cylinder, and a cylinder head, and an injection nozzle, which is arranged in the cylinder head on the opposite side of the piston crown eccentrically, spaced apart from the longitudinal axis of the cylinder, for the direct injection of fuel, which injection nozzle has a nozzle needle movable in a nozzle body, wherein the needle in the open position of the nozzle is moved into the combustion chamber, opening up an annular gap arranged between the nozzle body and needle.

主权项

1. An engine system, comprising: a combustion chamber; a cylinder; a cylinder head with an injection nozzle arranged in the cylinder head on an opposite side of a piston crown eccentrically and spaced apart from a longitudinal axis of the cylinder, for direct injection of fuel; a nozzle needle within the injection nozzle, the nozzle needle movable in a nozzle body which serves as a nozzle housing, the nozzle needle having top and bottom ends which contact the nozzle body when the injection nozzle is in a closed position; wherein an annular gap exists between the top and bottom ends of the nozzle needle and the nozzle body in the closed position of the injection nozzle, and wherein the nozzle needle is moved into the combustion chamber in an open position of the injection nozzle; and a guide element which projects into and influences a fuel flow, the guide element arranged on an inner surface of the nozzle body which faces toward the fuel, wherein the guide element is arranged within the annular gap in the closed position of the injection nozzle, wherein the injection nozzle is fluidically coupled to a fuel line via a fuel passage which runs through the nozzle needle and has one or more outlets into the annular gap.