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Combined oil ring

A combination of oil and oil ring technology, applied to piston rings, engine components, machines/engines, etc., can solve the problems of increased manufacturing costs and no effect on reducing fuel consumption

Inactive Publication Date: 2008-06-04
TEIKOKU PISTON RING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this technology has little effect on reducing fuel consumption
Additionally, manufacturing costs are increased due to the need to machine grooves on the oil ring

Method used

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  • Combined oil ring
  • Combined oil ring
  • Combined oil ring

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Experimental program
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Effect test

Embodiment Construction

[0026] Next, a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 3 .

[0027] The combined oil ring 1 is composed of a steel oil ring 2 and a helical expansion spring 3 . The combination oil ring 1 is installed in the oil ring groove 5 of the piston 4 .

[0028] The oil ring 2 is a ring with a substantially I-shaped cross section and has a gap 2a. The oil ring 2 is composed of an upper rail 6 and a lower rail 7 extending on the circumference, and a thin straight plate 8 extending on the circumference and connecting the paired rails 6 , 7 . The outer peripheral surfaces of the upper rail 6 and the lower rail 7 constitute sliding surfaces 11 , respectively, which are in contact with the inner peripheral surface 10 of the cylinder 9 . The outer peripheral protrusions of the upper rail 6 , the lower rail 7 and the plate 8 form an outer peripheral groove 12 . The oil scraped off by the lower rail 7 from the inner peripheral surface 10 o...

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PUM

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Abstract

A combined oil ring 1 is comprised of an oil ring 2 with a generally I-shaped cross section including upper and lower rails 6, 7 joined by a web 8 for sliding on an inner circumferential surface 10 of a cylinder 9 , and a coil expander 3 to press the oil ring 2 radially outwards. The combined oil ring 1 contains a seal member 14 for sealing a gap of the oil ring 2 and capable of making contact with the upper rail 6 in an outer circumferential groove 12 formed by the web 8 and the upper and lower rails 6, 7 . The seal member 14 may include a structure where the edge of the seal member 14 is bent, and catches in a window hole 13 formed on the web 8 of the oil ring 2.

Description

technical field [0001] The present invention relates to a combined oil ring for use in an internal combustion engine, and more particularly to a combined oil ring for reducing oil consumption through a clearance portion of the oil ring. Background technique [0002] A compression ring mainly used as a gas seal and an oil ring mainly used to control the thickness of an oil film on the surface of a cylinder bore wall are installed on a piston of an internal combustion engine. Oil rings are mainly steel composite oil rings with fixed distance expansion springs with separate upper and lower rails and steel composite oil rings with helical expansion springs, in which the upper and lower rails have an integral structure. On both combination oil rings, expansion springs press the rail against the cylinder bore wall, and the rail scrapes off the oil on the surface of the cylinder bore wall to control the thickness of the oil film on the cylinder wall. On a combined oil ring in whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J9/06F02F5/00
CPCF16J9/062F16J9/18
Inventor 加藤功
Owner TEIKOKU PISTON RING CO LTD