Piston ring for internal combustion engine

Abstract

The invention discloses a piston ring for an internal combustion engine. The piston ring comprises a piston ring body and is characterized in that the open end of the piston ring body is provided with an airflow sealing structure for sealing the gap of the open end, the airflow sealing structure comprises a protrusion integrated with one end part of the open end of the piston ring body, and the other end part of the open end of the piston ring body is provided with a clamping groove into which the protrusion is clamped. Through the design of the airflow sealing structure at the open end, the sealing performance of the piston ring is greatly improved, the blow-by amount is reduced, the diesel engine efficiency is improved, the engine oil consumption is reduced, and the engine life is prolonged.

Description

technical field [0001] The invention relates to a piston ring of an internal combustion engine. Background technique [0002] The temperature in the cylinder of a diesel engine rises sharply from start to normal operation. Considering the thermal expansion and contraction of materials, the piston ring must have a sealing gap during design and installation. When the engine is working, the high-temperature combustion gas enters the crankcase through the minimum sealing gap between the piston and the piston ring, causing a part of power loss. When a high-performance internal combustion engine is working, even if the minimum sealing gap reaches an ideal state, it will still cause a relatively large power loss. In addition, the general piston ring rotates freely in the ring groove. If the opening direction of the first gas ring and the second ring are aligned in the axial direction (commonly known as the counterpart), the amount of blow-by gas and oil consumption will be signifi...

AI Technical Summary

Problems solved by technology

When the engine is working, the high-temperature combustion gas enters the crankcase through the minimum sealing gap between the piston and the piston ring, causing a part of power loss

When a high-performance internal combustion engine is working, even if the minimum sealing gap is ideal, it will still cause a relatively large power loss

In addition, the general piston ring rotates freely in the ring groove. If the opening direction of the first gas ring and the second ring are aligned in the axial direction (commonly known as the counterpart), the amount of blow-by gas and oil consumption will be significantly increased, resulting in incomplete combustion of the engine. , producing blue smoke

In addition, due to the unavoidable out-of-roundness of the cylinder when it works at high temperature, it is difficult for the existing piston ring to form a stable running-in surface with the cylinder wall when it rotates in the groove, so that a good sealing effect cannot be achieved, resulting in blow-by and power loss

If the amount of blow-by gas continues to increase, it will cause wear or even breakage of piston rings and pistons, reducing engine life

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