Title:
COMBINED OIL RING
Document Type and Number:
WIPO Patent Application WO/2016/038916
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a combined oil ring that enables a reduction in the amount of oil consumed in a high-speed region, even if the oil ring is intended to be low tension. Provided is a combined oil ring wherein: an outer circumferential-surface end in a discretionary vertical cross-section of segments has an asymmetric shape; when a line that passes through the center of the width of the segments is set as a first intermediate line, the length of a line segment between a position a1 and a position b1, which are positions on a contour curve at a distance of 3μm from an outer circumferential apex towards the inner-circumferential side of the segment radial-direction, is set as L, the position a1 lying on a side closer to the engine combustion chamber and the position b1 lying on a side away from the engine combustion chamber, and an intermediate line of the line segment L is set as a second intermediate line, the second intermediate line is positioned farther away from the engine combustion chamber than the first intermediate line, and the outer circumferential apex of the segments is positioned on the second intermediate line or to the side farther away from the engine combustion chamber than the second intermediate line; and the pair of segments are fit into an oil ring groove so that the outer circumferential apex of each is positioned on the side away from the engine combustion chamber.
Inventors:
FUJITA HIRONORI (JP)
KAWANO KENTARO (JP)
KAWANO KENTARO (JP)
Application Number:
PCT/JP2015/059962
Publication Date:
March 17, 2016
Filing Date:
March 30, 2015
Export Citation:
Assignee:
TPR CO LTD (JP)
International Classes:
F16J9/20; F02F5/00; F16J9/06; F16J9/26
Foreign References:
| JP2003049705A | 2003-02-21 | |||
| JP2010530045A | 2010-09-02 | |||
| JPH09210203A | 1997-08-12 | |||
| JPH07239032A | 1995-09-12 | |||
| JP2010031835A | 2010-02-12 |
Other References:
See also references of EP 3056775A4
Attorney, Agent or Firm:
IAT WORLD PATENT LAW FIRM (JP)
Eye アット international patent business corporation (JP)
Eye アット international patent business corporation (JP)
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