Large diesel motor and method for operating same

Abstract

The present invention relates to large diesel engines and methods for operating large diesel engines. A large diesel engine having at least one cylinder, in particular a longitudinally scavenged two-stroke large diesel engine, in which the piston is arranged to move back and forth between a top dead center and a bottom dead center, A large diesel engine has a cylinder head that limits a combustionchamber for fuel with a piston, and a fuel injection nozzle for introducing fuel into the combustion chamber. The fuel injection nozzle includes: a conical seat that increases in the direction of thecombustion chamber; and a closing body that interacts with the seat to seal in the closed position, and that can be lifted from the seat by the lifting motion, so that the seat is seated An annular nozzle orifice is formed with the closing body, by means of which fuel can be introduced into the combustion chamber.

Description

Technical field [0001] The invention relates to a large diesel engine, in particular to a longitudinally scavenged two-stroke large diesel engine and a method for operating the large diesel engine. Background technique [0002] Large diesel engines (such as longitudinally scavenged two-stroke large diesel engines) are often used as drive units for ships and even in stable operations, for example, to drive large generators for generating electrical energy. Engines often run for a long period of time in continuous operation, which places high requirements on operational safety and availability. Therefore, extremely long maintenance intervals, low wear and economic handling of operating materials are the central criteria for operators. For example, a large diesel engine or a large engine usually has a cylinder with an inner diameter (inner bore) of at least 200 mm. Nowadays, large engines with internal bores of up to 960 mm or more are used. [0003] In the past few years, the qual...

AI Technical Summary

Problems solved by technology

This portion of fuel may cause unwanted deposits in the nozzle tip and may become poorly atomized by means of the nozzle orifice into the combustion chamber after injection is complete, or it may drip into places where it burns little or not at all

This leads to increased fuel consumption, to additional pollution of the exhaust gases (in particular with nitrogen oxides NOx), and to deposition of unburned fuel on all parts of the combustion chamber and on parts that come into contact with the exhaust gases

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