L-shaped piston ring of internal combustion engine

Abstract

The invention relates to a piston ring which is a seal and oil distribution part of an internal combustion part. After the L-shaped piston ring is applied, the rotation speed of a diesel engine is doubled, and the oil consumption of the diesel engine is reduced by a half; the L-shaped piston ring of the internal combustion engine is composed of a long arm (1) and a short arm (2); the long arm (1) and the short arm (2) are vertical to each other; when the short arm (2) is installed in a piston ring groove, the top of the long arm (1) is level with the top of a piston (4); the L-shaped piston ring of the internal combustion engine is of a split structure, is divided into three sections or four sections in the circumferential direction, and is tightly locked into a combined ring by a spiral spring (3) outside the short arm (2); a gap is arranged between the inner side face of the long arm (1) of the L-shaped piston ring of the internal combustion engine and the piston (4), and the gap is communicated with an air cylinder; the pressure in the air cylinder can be applied to the inner side face of the long arm (1); and when the pressure is applied to the inner face of the long arm (1), each section deflects by taking the spiral spring as a center, and the outer side face of the long arm (1) is pressed towards a cylinder wall (5), thus forming positive pressure.

Description

technical field [0001] The invention relates to a piston ring of an internal combustion engine, in particular to a piston ring of an internal combustion engine with an L-shaped section. technical background [0002] The piston ring is a key part for sealing and oil distribution between the piston and the cylinder in the internal combustion engine. The traditional piston ring is integral and has a rectangular cross section ( image 3 ), the positive pressure (sealing pressure) required for its sealing is composed of its slender rectangular cross-section and the pre-tightening force formed by heat setting during the manufacturing process. It is an invariable constant during the working process of the cylinder, and this preload must be set according to the strictest and harshest conditions of the internal combustion engine. Therefore, about 70% of the mechanical loss of the internal combustion engine is consumed in the friction between the piston group and the cylinder. And th...

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Problems solved by technology

[0003] In order to prevent the piston head from pulling the cylinder, the traditional first ring has a distance of (0.12-0.22) D (cylinder diameter) from the top of the piston, and there is a gap of 0.25-0.4mm between the piston and the cylinder wall within this distance, thus forming a harmful Space, not good for combustion, increases emissions, pollution

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