Steel piston with an assemblable central cooling gallery
CN224693460UActive Publication Date: 2026-08-28SHANDONG EVOLUTION NEW MATERIAL CO LTD
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Patent Information
- Application Number
- CN202522112341.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2035-09-30
AI Technical Summary
Technical Problem
[0002]随着内燃机强化程度的提高，内燃机爆发压力越来越高、热负荷越来越高，铝活塞熔顶、喉口开裂等问题越来越多，原来的铝活塞已经不能满足使用要求，对于强化程度较高、功率密度较大、热负荷较高的内燃机就必须使用钢活塞，受焊接工艺限制，焊接时无法直接形成中央冷却油腔，焊接结构的钢活塞只有一个外冷却油腔，燃烧室底部区域在没有中央冷却油腔的情况下，燃烧室底部区域的温度会超过320℃，燃烧室底部区域会出现机油结焦、碳化现象，造成机油过早老化变质
Benefits of technology
本实用新型在燃烧室底部区域形成中央冷却油腔，中央冷却油腔内的机油可以对燃烧室底部区域进行强制冷却，使燃烧室底部区域的温度降至280℃以下，有效防止机油的结焦、碳化现象的发生，解决由于燃烧室底部区域机油结焦、碳化造成机油过早老化变质的问题。
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Figure CN224693460U_ABST
Abstract
The utility model relates to a kind of steel piston can be assembled central cooling oil cavity structure, belong to piston technical field.Structure includes steel piston main body and cover plate, cover plate is arranged in the inner cavity of the lower part of combustion chamber of steel piston main body, cover plate and the bottom area of combustion chamber form central cooling oil cavity, the oil in central cooling oil cavity is used to the bottom area of combustion chamber is forcedly cooled, the temperature of the bottom area of combustion chamber is reduced to below 280 DEG C, effectively prevent the coking, carbonization phenomenon of oil occurs, solve the problem of oil premature aging deterioration due to the coking, carbonization of oil in the bottom area of combustion chamber.
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