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Oil control ring for pistons of internal combustion engines

A technology for internal combustion engines and oil scraper rings, which is applied to piston rings, mechanical equipment, engine components, etc., and can solve problems such as increased friction, undesired friction, and uneven load bearing of oil scraper rings

Inactive Publication Date: 2008-07-30
MAHLE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, it has been found in practice that the oil scraper ring is loaded unevenly over its entire circumference, that is to say, at the valleys the ring is loaded and at the crests the running surface of the oil scraper ring is in contact with the cylinder wall. No or only weak contact
This ultimately leads to high fuel consumption while the engine is working
An increase in the tangential force of the oil wiper ring would result in an even load, but would result in an undesired increase in friction

Method used

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  • Oil control ring for pistons of internal combustion engines
  • Oil control ring for pistons of internal combustion engines
  • Oil control ring for pistons of internal combustion engines

Examples

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Embodiment Construction

[0031] one click figure 2 The one-piece oil scraper ring identified by 10 has a running surface 13, to which suitable ring side faces 11b are respectively connected in the ring axial direction, these sides gradually become mutually parallel ring sides, an upper ring side 11a and a lower ring side 11c. On the ring back 12 there is provided a radial recess 12a for receiving a helical spring M, extending over the entire circumference of the wiper ring, as seen from image 3 Can be seen clearly. according to image 3 The wiper ring 10 is arranged in a ring groove 14 of a piston P such that its closed running surface 13 bears against the cylinder wall of a cylinder.

[0032] according to figure 1 , the upper and lower ring sides 11a and 11c have end faces 12b and 12c facing the ring back 12, which are corrugated and extend over the entire circumference of the wiper ring. According to the invention, the corrugated end faces 12b and 12c of the upper and lower ring sides are arr...

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Abstract

The invention relates to an oil control ring (10) for pistons of internal combustion engines. The aim of the invention is to provide an improved shape-adaptation capacity in comparison to prior art, with a tangential force that enables the ring to guarantee low friction and also low oil consumption during the operation of the engine. To achieve this, the inventive oil control ring comprises a solid bearing surface (13) that lies against the cylinder wall, in addition to parallel ring flanks (11a, 11c), between which a radial recess (12a) that runs around the periphery is configured in the rear (12) of the ring, said recess being designed to receive a coil spring (M). The peripheral region of the ring flanks is provided with undulating end faces (12b, 12c) that face towards the rear of the ring. Said undulating end faces (12b, 12c) of the upper and lower ring flanks (11a, 11c) are offset out of phase with one another.

Description

technical field [0001] The invention relates to a piston oil wiper ring for an internal combustion engine, which comprises a closed working surface supported on the cylinder wall and two mutually parallel ring sides, between which a Radial recesses extending over the entire circumference that receive a helical spring, wherein the ring side has, on the periphery, a wave-shaped end face facing the back of the ring. Background technique [0002] From patent DE 19808483 A1 a piston oil control ring for an internal combustion engine is known, in which, in order to improve its elasticity, cracks distributed over the entire circumference are provided, which extend axially across the entire cross-section of the ring and constitute drain hole. A disadvantage of oil wiper rings formed from sheet metal is the risk of festoons due to the introduction of cracks in the ring. [0003] Another embodiment of an oil scraper ring is known from DE 10041803C2, in which the filling capacity of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J9/06
CPCF16J9/062
Inventor 霍尔格·弗朗茨马丁·施特劳斯
Owner MAHLE GMBH
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