PISTON FOR ETHANOL FUEL ENGINE

WIPO Patent Application WO/2016/029599

A1

Provided is a piston for ethanol fuel engine, with a piston head being provided with a first gas ring (1), a second gas ring (2) and an oil ring (3) successively from top to bottom, wherein the first gas ring (1) is of a rectangular barrel face ring structure, the ring surface is provided with a PVD layer, and the tangential elastic force is 6.5-10.5 N; the second gas ring (2) is of a conical face outer twisted stepped ring structure, the ring surface is provided with a phosphate layer, and the tangential elastic force is 8.5-12.5 N; and the oil ring (3) is a steel strip combined oil ring, the ring surface is provided with a chrome-plated phosphate layer, and the tangential elastic force is 22-38 N. The piston rings for the piston have stronger corrosion resistance and abrasive resistance, which can prolong the service life of the piston.

JP4973971	Sliding member
JP6117301	The top piston ring for a crosshead type exhaust turbosupercharging type large-sized 2-stroke uniflow Scavenging internal-combustion engine

LUO JUN (CN)
ZHANG YINGBING (CN)
GAO WEI (CN)
ZHANG JIAXU (CN)
TIAN GUOQING (CN)
QIU RUOYOU (CN)
HE YUETAO (CN)
WANG YINGJIE (CN)

PCT/CN2014/093976

March 03, 2016

December 16, 2014

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ANHUI JIANGHUAI AUTOMOBILE CO (CN)

F02F5/00; F16J9/00

CN201025154Y	2008-02-20
CN103452691A	2013-12-18
CN101649792A	2010-02-17
CN102418620A	2012-04-18
CN204003139U	2014-12-10
JPH02176269A	1990-07-09
DE102011102897A1	2012-12-06

PACIFIC CHINA PATENT AGENT CO., LTD. (CN)
北京维澳专利代理有限公司 (CN)

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