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Engine and manufacturing method thereof

A technology of engines and internal combustion engines, applied in the direction of engine components, machines/engines, manufacturing tools, etc., can solve problems such as cylinder wall scratches

Inactive Publication Date: 2007-05-23
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A further problem is that when there is no discontinuity in the surface of the cylinder wall in the direction of piston stroke, it is easy to scratch the cylinder wall

Method used

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  • Engine and manufacturing method thereof
  • Engine and manufacturing method thereof
  • Engine and manufacturing method thereof

Examples

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Embodiment Construction

[0026] Referring to Figures 1 and 2, a cross-section of one cylinder 10 of a multi-cylinder diesel internal combustion engine is shown. Cylinder 10 is formed within a cylinder block 12 of the engine with a piston 14 slidably supported on cylinder bore wall 16 and having a plurality of piston rings 18 to provide a seal between piston 14 and cylinder bore wall 16 . FIG. 1 shows a cylinder 10 with a piston 14 occupying its top dead center position, while FIG. 2 shows a cylinder 10 with a piston 14 occupying its bottom dead center position.

[0027] Cylinder head 20 is connected by solid means (not shown) to cylinder block 12 to close the upper ends of cylinders 10 and supports a number of valves (not shown) to selectively allow air to enter and exhaust to flow out of cylinders 10 . A fuel injector nozzle 22 for injecting fuel into the cylinder 10 is supported by the cylinder head 20 .

[0028] As shown in FIG. 3, the cylinder bore wall 16 in the region of the ring inversion has ...

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Abstract

An internal combustion engine is provided having at least one cylinder bore for slidingly supporting a piston, the cylinder bore wall of the at least one cylinder of the engine having pockets formed therein for retaining lubricant to reduce friction between the cylinder bore wall and piston. The pockets are elongate and have axes which are substantially parallel to the axis of the cylinder bore. The pockets are located at a first region supporting the piston when the piston is at its top dead center position. A method of making the cylinder is also provided. It is possible to obtain reduced piston friction and wear characteristics without penalizing oil consumption by use of the combination of pockets and smoothing surface refinement.

Description

technical field [0001] The present invention relates to internal combustion engines and methods of manufacture, in particular to engines including cylinders having a low piston friction arrangement and methods of manufacture. Background technique [0002] It is known that each cylinder wall of an engine must have a certain roughness in order to retain oil serving as lubricant between the cylinder walls and the pistons sliding in the respective cylinders. In practice, the surface of the cylinder wall contains many peaks and troughs in which the oil is stored. It is also known, in the manufacture of internal combustion engines, to produce the required surface finish on each cylinder wall of the engine using a honing process in order to provide such an oil retaining surface. [0003] DE 19614328 describes a method for surface finishing of a workpiece by means of a laser beam to produce a regular surface finish. Examples of various surface finishes that can be achieved by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F1/20B24B7/00B23K26/36B23K26/00B23K26/38F16J10/04
CPCB23K2201/006F02F1/20F16J10/04B23K26/385B23K2201/003B23K26/0078B23K26/389B23K26/3584B23K2101/003B23K2101/006B23K26/36F02F1/004
Inventor 伊恩·G·佩格
Owner FORD GLOBAL TECH LLC