Reduction device for reducing gas pressure in piston ring group of reciprocating piston type internal combustion engine

Abstract

The present invention relates to a reduction device for reducing gas pressure in piston ring group of reciprocating piston type internal combustion engine. The piston comprises a piston crown which is adjacent to a ring area, and the piston crown faces a combustion chamber in a mounting state. The piston is arranged in the operation state with a mode that the reciprocation along a longitudinal axis of the cylinder is allowed, namely, the piston crown of the piston functions together with a scraping device provided at the cylinder wall of the cylinder next to an upper dead center of the motion in the cylinder for controllably scraping the combustion residue, wherein, the reduction device is designed to a dent shape thereby realizing controllable deposit of the combustion residue at the reduction device. According to the invention, the scraping device and the piston crown are designed and arranged relatively with each other, namely, the scraping device and the piston crown at least partially at a stop state temperature at an angle which can be preset, thereby causing the reduction of gas pressure acting on the piston ring group to be automatically adjusted under the cooperation of the piston crown and the scrapping device.

Description

technical field [0001] The invention relates to a pressure relief device (Reduziereinrichtung), a piston, a detachable (demontierbaren) for reducing the air pressure on a piston ring set (Kolbenringpaket) of a reciprocating piston internal combustion engine (Hubkolbenbrennkraftmaschine) according to the preamble of the independent claims Scraper rings (Abstreifring) and cylinders (Zylinder), and reciprocating piston internal combustion engines, especially large two-stroke diesel engines. Background technique [0002] Pistons known from the prior art for reciprocating piston internal combustion engines (such as two-stroke large diesel engines), in particular for longitudinally scavenging two-stroke large diesel engines, are generally equipped with a plurality of piston ring grooves each in a piston ring groove. A group of piston rings arranged one above the other in the center. Typically, depending on the size, power or construction of the reciprocating piston internal combu...

AI Technical Summary

Problems solved by technology

In addition, in the case of an insufficient seal between the wear ring and the piston crown, there is always the risk that individual particles will be uncontrolled from the deposits of combustion residues due to the gas flow flowing downwards at the piston. The ground is stripped, so that these particles can be deposited at the cylinder running surface, for example in the lower part of the cylinder, which can also contaminate the cylinder lubricating oil and in the worst case can lead to damage, such as the feared wear

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