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Piston with a skirt having oil flow slots and method of construction thereof

A piston and skirt technology, which is applied in the piston field of heavy-duty diesel engines, can solve the problems of reducing engine performance and engine life damage, and achieve the effects of reducing dynamic friction, reducing fuel consumption, and reducing exhaust emissions

Inactive Publication Date: 2012-09-12
FEDERAL MOGUL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As such, while it is desirable to maintain a continuous supply of lubricating oil in the area of ​​the piston rings, too much lubricating oil can be detrimental to engine life and can also reduce engine performance

Method used

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  • Piston with a skirt having oil flow slots and method of construction thereof
  • Piston with a skirt having oil flow slots and method of construction thereof
  • Piston with a skirt having oil flow slots and method of construction thereof

Examples

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Embodiment Construction

[0022] Referring to the drawings for more details, Figures 1 and 2 illustrate a piston 10 manufactured in accordance with a preferred embodiment of the present invention for reciprocating movement in a cylinder bore (not shown) of an internal combustion engine such as a diesel engine . The piston 10 has a body 12 extending along a central axis 14, the body 12 is either cast, forged, or made by any other manufacturing process, and the piston 10 is seated in the cylinder bore along the central axis 14. back and forth. By way of example, and not limitation, body 12 has an upper crown 16 connected to a lower crown 18 having a pair of pin seats 20 depending therefrom for providing laterally spaced pin holes 22 , the pair of pin holes 22 are aligned along a pin hole axis 24 that extends generally perpendicular to the central axis 14 . By way of example and not limitation, the pin seat 20 is connected by a support portion 28 to a laterally spaced skirt 26 to form a so-called "monob...

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PUM

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Abstract

A piston has a pair of diametrically opposite skirt portions with convex outer surfaces. Each skirt portion has opposite side edges extending substantially parallel to a central axis of the piston to a free end. The skirt portions each have a recessed slot extending radially into the convex outer surface to a recessed surface. The recessed surface extends fully across the convex outer surface to the side edges and separates an upper band section of the convex outer surface from a lower band section of the convex outer surface.

Description

technical field [0001] This invention relates generally to internal combustion engines, and more particularly to pistons for heavy duty diesel engines. Background technique [0002] It is well known that internal combustion engines, especially diesel engines, experience high fuel consumption, which leads to undesirable exhaust gas pollution. In addition, with the generation of oil consumption, carbon deposits are gradually generated on the surface of the piston, especially in the area of ​​the top surface of the piston, including in the groove of the piston ring. As a result, carbon deposits restrict the annular motion of the piston rings, reducing the effectiveness of the piston rings to properly seal combustion gases and control fuel consumption, resulting in increased oil leakage, reduced engine performance, and shortened life of engine components and an increase in emissions. [0003] In addition to the above-mentioned problems, another known problem can be caused by u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/02
CPCF02B23/0672F02F3/003F02F3/24F02F2003/0061F02F2200/04F16J1/04F16J1/08Y02T10/12Y10T29/49249F02F2200/06
Inventor 米格尔·艾克斯韦多安德鲁·莱博尔德艾尔顿·马丁斯
Owner FEDERAL MOGUL CORP
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