Extended longitudinally scavenged motor

Abstract

The invention relates to an extended longitudinally scavenged motor having a plurality of cylinders and a cylinder section delimited by a bottom, each cylinder comprising a cylinder liner and the cylinder liners being arranged side by side in the cylinder section in the longitudinal direction, each cylinder liner extending from a first end facing the bottom to a second end facing a combustion chamber of the cylinder, a piston capable of moving back and forth is arranged in each cylinder liner, a scavenging air opening is formed in the cylinder liner adjacent to the first end of each cylinder liner, scavenging air from the scavenging air opening of a scavenging air receiver can flow into the corresponding cylinder liner through the scavenging air opening, each cylinder is provided with a piston subspace, each piston subspace is delimited by the underside of the piston of the corresponding cylinder and the bottom of the cylinder section, a partition wall is provided between two adjacent piston subspaces in the longitudinal direction and separates the two piston subspaces from each other, and each piston subspace is connected to the scavenging air receiver via a flow connection.

Description

technical field [0001] The invention relates to a large longitudinally scavenged engine. Background technique [0002] Large engines, which may be designed as two-stroke or four-stroke engines, such as longitudinally scavenged two-stroke large diesel engines, are often used as drive units for ships or even in stationary operations, e.g. for driving large generator to generate electricity. Engines are often operated for considerable periods of time in continuous operation, which places high demands on operational safety and availability. Particularly long maintenance intervals, low wear and economical handling of operating materials are therefore central criteria for the operator. Large engines typically have cylinders with an internal diameter (bore) of at least 200mm. Now, use larger engines with up to 960mm or even larger bores. [0003] Energy efficiency and exhaust gas quality have been another important issue of increasing importance for several years, especially th...

AI Technical Summary

Problems solved by technology

This can lead, for example, to an undesired self-ignition of the air-fuel mixture in the cylinder, which can lead to very high mechanical loads and greatly increased emission values

Furthermore, an incorrect ratio of the air-fuel mixture can lead to the fact that the spark ignition combustion process runs too fast (rapid combustion), which also leads to high mechanical loads and high emission values

If the air content is too high, the air-fuel mixture is too lean, misfires can occur, which is of course also bad for efficient and low-emissions operation of the engine

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