Lubrication system of piston ring of internal-combustion engine and upper portion scraper ring of adjacent cylinder sleeve

Abstract

The invention discloses a lubrication system of a piston ring of an internal-combustion engine and an upper portion scraper ring of an adjacent cylinder sleeve. The lubrication system comprises a cylinder body of an opposed piston opposed cylinder engine. The cylinder body is provided with an outer piston and an inner piston. At least one piston ring is arranged on the top of the outer piston. The scraper ring is arranged under the piston ring and used for scraping off lubricating oil at the lower portion of the cylinder body, and the scraped lubricating oil is transmitted to the upper portion of the cylinder body. The scraper ring is provided with an oil storage tank used for storing the scraped lubricating oil. When the outer piston and the inner piston reach an upper dead center in an operating cycle, the lubricating oil is left from the oil storage tank under the effect of piston deceleration, and certain amount of the lubricating oil enters the inner surface of the upper portion of the cylinder body. Due to the fact that the piston scraper ring is arranged on the top of the piston, engine oil left on the cylinder wall below an air inlet of a cylinder is collected by the scraper ring and the engine oil is transmitted to the cylinder wall close to a combustor.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to the technical field of a lubricating system for supplying lubricating oil to the upper piston ring and the upper oil scraping ring of the cylinder liner when the piston of the two-stroke engine is close to the top dead center. Background technique [0002] Traditional internal combustion engines rely on the piston rings to carry away the splashed oil on the cylinder wall or cylinder liner during the working cycle to lubricate. [0003] In some two-stroke engines, such as "with a single crankshaft, with opposed cylinders, opposed piston (OPOC) engines", the lubricating oil travels through the crankshaft and connecting rod oil passages to the piston pin. Usually the oil from the crankcase is splashed onto the cylinder wall below the piston rings to lubricate the cylinder wall. In such a lubricating system, when the piston goes from bottom dead center (BDC) to t...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a lubrication system for the piston ring of an internal combustion engine and the upper part of the adjacent cylinder liner to solve the problem that if there is too much oil on the cylinder liner in the existing two-stroke engine, the piston ring will take away more oil. Engine oil enters the scavenging port and combustion chamber, causing the oil to enter the exhaust port to cause automobile engine exhaust (HC) emissions

At the same time, if there is not enough oil on the piston ring, it will cause problems such as increased wear

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