Piston head

Abstract

The invention relates to a piston head comprising a piston head body. A circumferential side wall of the piston head body is provided with at least two sealing ring grooves for mounting sealing rings,spaced distances exist between the adjacent sealing ring grooves, and a pressure relief oil stopping groove is arranged at the position between every two of the at least two adjacent sealing ring grooves and on the circumferential side wall of the piston head body. The piston head is simple in structure and low in preparation cost, can effectively reduce consumption of lubricating oil, improves the lubricating performance of a piston and a cylinder sleeve, meanwhile, prevents coke generation generated by the fact that the lubricating oil enters a combustion chamber, prevents high temperatureand high pressure gas from entering a crankcase, and avoids the explosion risk of the crankcase.

Description

technical field [0001] The invention relates to the field of internal combustion engines, in particular to a piston head. Background technique [0002] The piston is a part that reciprocates in the cylinder block of an internal combustion engine. A sealing ring is installed on the circumferential wall of the piston head to prevent high-temperature and high-pressure gas from entering the crankcase and prevent oil from entering the combustion chamber. However, under high-temperature, high-pressure, and high-intensity working environments, during the working process of most internal combustion engine pistons on the market, a large amount of lubricating oil will escape into the combustion chamber for combustion, resulting in carbon deposits in the piston combustion chamber, high oil consumption, and easy This leads to lax closing of the throttle valve, air leakage of the intake valve or exhaust valve, and more serious knocking, resulting in reduced reliability of the internal co...

AI Technical Summary

Problems solved by technology

However, under high-temperature, high-pressure, and high-intensity working environments, during the working process of most internal combustion engine pistons on the market, a large amount of lubricating oil will escape into the combustion chamber for combustion, resulting in carbon deposits in the piston combustion chamber, high oil consumption, and easy This will result in lax closing of the throttle valve, air leakage of the intake valve or exhaust valve, and more serious knocking, resulting in a decrease in the reliability of the internal combustion engine and seriously affecting the normal operation of the internal combustion engine

At the same time, a large amount of gas will pass through the gap between the sealing ring and the cylinder wall and enter the crankcase, causing the pressure of the crankcase to increase, and there is a risk of explosion

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