PISTON RING - NIPPON PISTON RING CO LTD

Title:

PISTON RING

Document Type and Number:

WIPO Patent Application WO/2019/065830

Kind Code:

A1

Abstract:

Provided is a piston ring to be combined with a low friction cylinder liner, with which it is possible to obtain a friction reducing effect of the low friction cylinder liner even at low rotational speeds when the rotational speed of an internal-combustion engine is 1000 rpm or less, such as in an idling state. This piston ring to be combined with a low friction cylinder liner in which prescribed recessed portions are formed in an inner wall surface of the cylinder liner has a piston ring surface pressure of 0.8 to 2.5 MPa.

More Like This:

JPH0542825	[Name of invention] Piston ring for internal combustion engine
JP6835785	Compression ring

Inventors:

ITO MICHIHIRO (JP)
HASUMI RYOSUKE (JP)

Application Number:

PCT/JP2018/035908

Publication Date:

April 04, 2019

Filing Date:

September 27, 2018

Export Citation:

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Assignee:

NIPPON PISTON RING CO LTD (JP)

International Classes:

F16J9/12; F02F5/00; F16J9/06; F16J10/00

Foreign References:

JP2017036823A	2017-02-16
JPH09144881A	1997-06-03
JP2005036752A	2005-02-10
JP2012052590A	2012-03-15

Attorney, Agent or Firm:

INTECT INTERNATIONAL PATENT OFFICE et al. (JP)

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