A piston
By setting buffer components between the upper scraper ring and the upper sidewall, and between the lower scraper ring and the lower sidewall, the problem of poor sealing caused by oil ring wear is solved, thereby reducing oil consumption and improving piston durability.
CN224300983UActive Publication Date: 2026-05-29MAHLE HLDG (CHINA) CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MAHLE HLDG (CHINA) CO LTD
- Filing Date
- 2025-06-18
- Publication Date
- 2026-05-29
AI Technical Summary
Technical Problem
In the prior art, the wear of the upper and lower scrapers of the oil ring on the sidewall of the ring groove leads to poor sealing performance and affects oil consumption.
Method used
A first buffer is provided between the upper scraper ring and the upper sidewall of the oil ring, and a second buffer is provided between the lower scraper ring and the lower sidewall to avoid direct contact friction. A rubber sealing ring is used as the buffer and is set in the groove to limit its position.
Benefits of technology
It effectively avoids wear on the sidewalls of the ring groove, maintains the sealing performance of the oil ring, reduces oil consumption, and extends the service life of the piston.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224300983U_ABST
Abstract
The application relates to a piston and relates to the technical field of engines. The piston comprises a body and an oil ring, the body comprises a sliding groove, and the ring groove comprises an upper side wall and a lower side wall. The oil ring comprises a lining ring, an upper wiper ring and a lower wiper ring. When the oil ring is arranged in the ring groove, a first buffer is arranged between the upper wiper ring of the oil ring and the upper side wall, and / or a second buffer is arranged between the lower wiper ring and the lower side wall. The first buffer is arranged on the inner side of the radial center of the upper wiper ring, direct contact and friction between the inner side of the upper wiper ring and the upper side wall are avoided through the first buffer, the upper side wall is prevented from being rubbed to form a groove, the sealing performance of the upper wiper ring is prevented from being affected, and the oil consumption is prevented from being affected. The second buffer is arranged on the inner side of the radial center of the lower wiper ring, direct contact and friction between the lower wiper ring and the lower side wall are avoided through the second buffer, the lower side wall is prevented from being rubbed to form a groove, the sealing performance of the lower wiper ring is prevented from being affected, and the oil consumption is prevented from being affected.
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