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Monolithic, galleryless piston and method of construction thereof

A piston and piston body technology, applied in the field of pistons, can solve the problems of increased cost of pistons

Active Publication Date: 2018-10-23
FEDERAL MOGUL MOTORPARTS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the joining process used to join the upper and lower parts together, the cost of manufacturing a piston with the upper and lower parts joined together along the joint to form a closed or partially closed cooling channel is generally increased

Method used

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  • Monolithic, galleryless piston and method of construction thereof
  • Monolithic, galleryless piston and method of construction thereof
  • Monolithic, galleryless piston and method of construction thereof

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Embodiment Construction

[0022] Referring to the accompanying drawings in more detail, Figure 1-13 A view is shown of a piston 10 constructed in accordance with an exemplary embodiment of the present invention for reciprocating movement within a cylinder bore or chamber (not shown) of an internal combustion engine, such as a modern compact high performance automotive engine. Piston 10 is constructed to have a unitary body formed from a single piece of material, for example by machining, forging or casting, and possible finishing may be carried out, if required, to complete the construction. Accordingly, the piston 10 does not have multiple parts connected together, such as upper and lower parts connected to each other, as is common for pistons with closed or partially closed cooling channels bounded or partially enclosed by cooling channel floors. defined. In contrast, piston 10 is "non-channeled" in that it has no cooling channel floors or other features that define or partially define cooling chan...

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Abstract

A galleryless steell piston for an internal combustion engine is provided. The piston has a monolithic piston body including an upper wall forming an upper combustion surface with first and second portions. The first portion extends annularly along an outer periphery of the upper wall and the second portion defines a combustion bowl. The piston further includes undercrovvn surface located directlyopposite the combustion bowl with an exposed 2-dimensional surface area allowing for contact of cooling oil. The exposed 2-dimensional surface area ranges from 25 to 60 percent of a cross-sectional area defined by a maximum outer diameter of the piston body. To further enhance cooling, a portion of the undercrown surface is concave or convex, such that oil is channeled during reciprocation of thepiston from one side to the opposite side of the piston.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Patent Application Serial No. 14 / 988,885, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to internal combustion engines, and more particularly to pistons thereof. Background technique [0004] Engine manufacturers encounter increasing demands to improve engine efficiency and performance, including but not limited to improved fuel economy, reduced fuel consumption, improved fuel systems, increased compression loads and operating temperatures within cylinder bores, reduced heat loss through pistons, Improve the lubrication of components, reduce engine weight and make engines more compact, while reducing manufacturing-related costs. [0005] While it is desirable to increase compression loads and operating temperatures within the combustion chamber, there is still a need to keep the temperature of the pi...

Claims

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Application Information

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IPC IPC(8): F02F3/20F02B23/06
CPCF02F3/20F02B23/0642F02F3/16F02F3/26F02F2200/04
Inventor J·里夫M·维能格尔
Owner FEDERAL MOGUL MOTORPARTS LLC
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