EP 4208656 A1 20230712 - PISTON RING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE WITH DIRECT WATER INJECTION
Title (en)
PISTON RING SYSTEM FOR AN INTERNAL COMBUSTION ENGINE WITH DIRECT WATER INJECTION
Title (de)
KOLBENRINGSYSTEM FÜR EINEN VERBRENNUNGSMOTOR MIT WASSERDIREKTEINSPRITZUNG
Title (fr)
SYSTÈME DE SEGMENT DE PISTON POUR UN MOTEUR À COMBUSTION INTERNE À INJECTION DIRECTE D'EAU
Publication
Application
Priority
- DE 102020122862 A 20200901
- EP 2021071278 W 20210729
Abstract (en)
[origin: WO2022048832A1] The invention relates to a piston ring system for an internal combustion engine, comprising a first compression piston ring (2), a second compression piston ring (4), and an oil scraping piston ring (6). The first compression piston ring (2) has a first ring body (8) with a first upper ring flank (10), a first lower ring flank (12), a first ring inner face (14), a first ring outer face (16), and two first abutting surfaces, and a cylinder running surface (20) of a first contact region (18) of the first ring body (8) is arranged above a first piston ring center (22), at least one first oil pocket (24) being arranged below the first contact region (18) in the circumferential direction; and the second compression piston ring (4) comprises a second ring body (26) with a second upper ring flank (28), a second lower ring flank (30), a second ring inner face (32), a second ring outer face (34), and two second abutting surfaces, and a cylinder running surface (20) of a second contact region (36) of the second ring body (26) is arranged above or below a second piston ring center (38), at least one second oil pocket (40) being arranged below the second contact region (36) in the circumferential direction, wherein the oil scraping piston ring (6) is a two-part or three-part oil scraping ring.
IPC 8 full level
F16J 9/20 (2006.01)
CPC (source: EP US)
F16J 1/00 (2013.01 - EP); F16J 9/00 (2013.01 - EP); F16J 9/068 (2013.01 - EP); F16J 9/10 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DE 102020122862 A1 20220303; EP 4208656 A1 20230712; US 11959552 B2 20240416; US 2023272853 A1 20230831; WO 2022048832 A1 20220310
DOCDB simple family (application)
DE 102020122862 A 20200901; EP 2021071278 W 20210729; EP 21751813 A 20210729; US 202118043596 A 20210729