Motoren und Kolben dafür

Details

Veröffentlichungs-Nr.

EP2626598

Aktenzeichen

EP13000440

Anmeldetag

30. Januar 2013

Veröffentlichung

3. August 2016

Erteilung

3. August 2016

Rechtsraum

EP

IPC

F16J9/00F16F9/36F16J1/09F16J9/22F02F5/00

Abstract

An engine in which an oil consumption and a leakage of blow-by gas can be stably reduced for a long period of time has a piston including a first land 3, a first ring groove 4, a second land 5, a second ring groove 6, a third land 7, a third ring groove 8, and a piston skirt 9 formed on a piston peripheral wall 1 in this order from the head of the piston. A first pressure ring 10 is fitted in the first ring groove 4; a second pressure ring 11 is fitted in the second ring groove 6; an oil ring 12 is fitted in the third ring groove 8. A corner at a boundary between an outer peripheral face 5a of the second land 5 and a second-land-side end face 6a of the second ring groove 6 is bevelled, with a tapered face 14 having a diameter reducing toward the second ring groove 6 to form an indentation for the suppression of variation in gas pressure in the space 17 facing the second land during upward and downward movements of the piston.

Anmelder

Firma

Kubota Corporation

Land

🇯🇵 Japan

Fachgebiete