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Cylinder assembly and piston for a longitudinally flushed stroke piston combustion engine

A technology of reciprocating pistons and internal combustion engines, applied in the direction of cylinders, pistons, cylinder heads, etc., can solve the problems of lubricating oil loss, receiving space pollution, disadvantages, etc.

Inactive Publication Date: 2012-09-26
WAERTSILAE SCHWEIZ AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this leads to the loss of relatively expensive lubricating oil, and on the other hand, to unnecessary contamination of the receiving space
Furthermore, the lubricant is no longer available for further movement of the piston
[0009] Another disadvantage is the fixed geometry of the scavenging slit
This would be particularly disadvantageous for possible use as a "dual fuel" electric motor, i.e. as an electric motor capable of operating on different fuels such as alternatively heavy oil or gas or other different fuels

Method used

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  • Cylinder assembly and piston for a longitudinally flushed stroke piston combustion engine
  • Cylinder assembly and piston for a longitudinally flushed stroke piston combustion engine
  • Cylinder assembly and piston for a longitudinally flushed stroke piston combustion engine

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Embodiment Construction

[0044] figure 1 A partially cutaway schematic view of a cylinder arrangement 1' with a cylinder liner 2', a piston 3' and a fresh air supply system 400' is shown.

[0045] For large longitudinally scavenged two-stroke diesel engines, figure 1 The cylinder device 1' is a typical device as known in the prior art. For a better distinction from known cylinder arrangements, the corresponding reference numbers are provided with single quotation marks, while the reference numbers which are characteristic of the cylinder arrangement according to the invention do not have single quotation marks.

[0046] The device comprises a cylinder 2', also called a cylinder liner 2', wherein a piston 3' is movably arranged to move back and forth along the cylinder wall of the cylinder 2'. The piston 3' comprises a piston ring assembly 33', which is shown schematically in this example with only two piston rings.

[0047] According to the view, the combustion chamber 200' present in the combustio...

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Abstract

The invention relates to a cylinder assembly 1 for a longitudinally flushed stroke piston combustion engine and especially to a large-size two-stroke diesel generator moving slowing and flushing longitudinally. The cylinder assembly 1 includes an air cylinder provided with a combustion room 200 and an entrance area 22. A piston 3 moving back and forward long a cylinder axis Z is installed between an upper dead point and a lower dead point in the cylinder 2. And a flushing air entrance 4 is arranged in the cylinder 2 to facilitate to lead the flushing air 4 into the combustion room 200. The cylinder arrangement comprises a piston (3) which is provided as two piece piston. A mantle piston (32) is provided with a piston ring (33), where a main piston (31) is positioned in the mantle piston. A retaining device is provided at a cylinder for the mantle piston. The rinsing air (41) is introduced from an inlet area (22) to a combustion chamber (200) by the rinsing air opening (320) of the mantle piston.

Description

technical field [0001] The invention relates to a cylinder arrangement and a piston for a longitudinally scavenged reciprocating piston internal combustion engine, in particular a slowly running longitudinally scavenged large two-stroke diesel engine according to the preamble of the independent claim. Background technique [0002] Large diesel engines are frequently used as drives in ships or also in stationary operations, for example, to drive large generators for generating electrical energy. In this respect, the electric motors are usually operated in a continuous operating mode for a considerable period of time, which places high demands on operational safety and availability. For this reason, in particular long maintenance intervals, low wear and economical use of fuel and operating materials are central principles for operating the machine for the operator. Among other things, the piston-running action of such a large-bore slow-running diesel engine is decisive for lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B25/00F02F1/18F02F3/00
CPCF02B25/04F01L11/04F01L1/38F01L11/02F02B2075/025F02B33/04F02F3/00F02B25/26
Inventor M·斯塔克
Owner WAERTSILAE SCHWEIZ AG
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