Unlock instant, AI-driven research and patent intelligence for your innovation.

Internal combustion engine oil ring

A technology for internal combustion engines and oil rings, applied to piston rings, mechanical equipment, engine components, etc., can solve problems such as different oil scraping performance, uneven contact width, and inability to fully reduce fuel consumption, so as to reduce fuel consumption and oil seal performance effect

Pending Publication Date: 2021-05-07
NIPPON PISTONRING CO LTD
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, when the outer peripheral sliding surface of the oil ring main body is ground by barrel grinding or the like after winding forming, the shape of the above-mentioned front end part is greatly different between the part protruding due to undulations and the part not protruding, and the outer peripheral sliding surface The contact width with the cylinder becomes uneven in
As a result, the oil scraping performance of the oil ring main body differs in each position in its circumferential direction, and thus the effect of reducing oil consumption may not be sufficiently obtained

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Internal combustion engine oil ring
  • Internal combustion engine oil ring
  • Internal combustion engine oil ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 20～40 and comparative example 7～13

[0177] [(d) Examples 20 to 40 and Comparative Examples 7 to 13: Measurement of final shapes in various oil rings]

[0178] As shown in Test Example 1, the oil rings used in Examples 1 to 19 and Comparative Examples 1 to 6 have Figure 3B case of a shape like that shown, but for the rail front end to have the Figure 4A The oil ring in the case of the concave portion step difference as shown is also the same as the above, and it is determined whether it is due to the window angle θ of the oil return hole w Confirmation of the difference in size and amount of undulations produced in the main body of the oil ring.

[0179] In this test example, the final shape of an oil ring having a cylinder bore diameter of 64.0 to 147.0 mm was measured. In addition, the oil rings used in Examples 20 to 40 and Comparative Examples 7 to 13 are as shown in Table 4 and Table 5, and the conditions were set differently for each Example and Comparative Example.

[0180] In addition, in Examples 20...

Embodiment 41～51 and comparative example 14～17

[0186] [(e) Examples 41 to 51 and Comparative Examples 14 to 17: Test including measurement of fuel consumption ratio]

[0187] As in Examples 20 to 40 and Comparative Examples 7 to 13, the front end of the guide rail has a Figure 4A For the oil ring in the case of the concave portion step difference shown, the window angle θ of the oil return hole was checked for w It is confirmed that the size of the oil ring makes a difference in the amount of undulations produced in the main body of the oil ring. In addition, in this test example, the difference in fuel consumption due to the size of the opening width C of the oil return hole was also confirmed.

[0188] In this test example, an actual machine test of an inline 4-cylinder diesel engine having an oil ring having a cylinder bore diameter of 83.0 mm or 95.0 mm was performed. In addition, the oil rings used in Examples 41 to 51 and Comparative Examples 14 to 17 are as shown in Table 6, and the conditions were set differentl...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Provided is an internal combustion engine oil ring with which it is possible to reduce undulations generated during manufacture of the oil ring, and to improve the oil sealing performance, while maintaining an effect of reducing oil consumption. The internal combustion engine oil ring (1) is provided with an oil ring main body (2) in which the cross-sectional shape of an oil ring is substantially I-shaped, and a coil expander (3) disposed on the inner circumferential side of the oil ring main body (2), wherein: the oil ring main body (2) is configured from a first rail (5) and a second rail (6) which are in contact with a cylinder inner wall surface, and a web (4) provided with a plurality of oil return holes (7) for allowing oil that has been scraped off the inner wall surface of the cylinder by the first rail (5) and the second rail (6) to flow down toward a piston rear surface; and undulations in at least one of a part (2f) of an inner circumferential side of the oil ring main body (2) excluding an inner circumferential groove (2e) and an oil return groove (2d), and a part of an outer circumferential side of the oil ring main body (2) excluding sliding surfaces (8A) are at most equal to 6.0 [mu]m.

Description

technical field [0001] The invention relates to an oil ring for an internal combustion engine with a two-piece structure of an oil ring main body and a helical spring. Background technique [0002] Along with the improvement in the performance of engines for internal combustion engines (piston reciprocating engines, etc.) in recent years, oil rings for automobile engines are also required to satisfy both friction reduction and engine fuel consumption reduction. Therefore, various studies have been conducted on the shape of the oil ring and the like. For example, techniques such as reducing the tension of an oil ring disposed in a cylinder bore to reduce frictional force, and reducing the width of an oil ring to improve fuel efficiency are employed. [0003] In addition, there are generally oil rings having different structures called two-piece oil rings and three-piece oil rings among the oil rings. The two-piece oil ring has high rigidity and heat load resistance, so it i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F16J9/20F02F5/00F16J9/06
CPCF02F5/00F16J9/062
Inventor 伊藤伦浩莲见良介矢泽务牧田刚
Owner NIPPON PISTONRING CO LTD