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An internal combustion engine

A technology for internal combustion engines and pistons, applied in mechanical equipment, engine components, machines/engines, etc., can solve problems such as high prices, achieve good sliding performance, low frictional resistance, and reduce manufacturing costs

Active Publication Date: 2013-10-23
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, cobalt or tungsten contained in the Ni-P-Co-W thin film is a kind of rare metal and is expensive

Method used

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  • An internal combustion engine
  • An internal combustion engine
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Examples

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Effect test

experiment example 1

[0052] The electroless nickel plating solution used the Ni-P plating solution (trademark is SEK-795) produced by Japan KANIGEN Co., Ltd. Thereafter, cobalt sulfate as a source of cobalt and sodium tungstate as a source of tungsten were added to this electroless nickel plating solution to produce a Ni-P-Co-W plating solution. Thereafter, a Ni-P-Co-W thin film was formed on a predetermined aluminum substrate using the Ni-P-Co-W plating solution to prepare a plurality of samples. However, in Experimental Example 1, the silicon-containing aluminum plate (AC8A) was substituted as the aluminum substrate.

[0053] The contents of the above-mentioned various samples are shown in Table 1 below. That is, as shown in Table 1, the content of each component in a plurality of samples was changed. A plurality of samples are Comparative Examples 1-2 and Examples 1-15.

[0054] 【Table 1】

[0055]

[0056] As shown in Table 1 above, the contents of the plurality of samples are as follows...

Embodiment 1

[0059] Example 1 is a thin film of "Ni-2.0% by weight P-0.01% by weight of W" (no Co component).

Embodiment 2

[0060] Example 2 is a thin film of "Ni-weight percentage 2.0%P-weight percentage 0.5%Co-weight percentage 0.01%W".

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Abstract

The invention provides an electroless nickel-plated thin film suitable for being used as a thin film of a piston or a cylinder of an internal combustion engine. The electroless nickel-plated thin film does not have lead and has low price. An electroless nickel-plated thin film is disposed on the sliding surface (13) of the piston (11) of the internal combustion engine or on the sliding surface (12a) of the cylinder (12) in which the piston slides. The electroless nickel-plated thin film comprises, by weight, 0.6 to 2.8 percent of phosphorus, 0.5 to 1.8 percent of cobalt, 0.005 to 0.5 percent of tungsten, and the balance being nickel.

Description

technical field [0001] The invention relates to an internal combustion engine, whose piston or cylinder has an electroless nickel plating film, so that the wear resistance of the internal combustion engine is improved. Background technique [0002] In recent years, in order to reduce the weight of an internal combustion engine, a combination of a piston made of aluminum alloy and a cylinder made of aluminum alloy has been gradually adopted. Since friction occurs between the sliding surface (outer peripheral surface) of the piston and the sliding surface (inner peripheral surface) of the cylinder in which the piston slides, wear occurs on each sliding surface. Due to the wear of each sliding surface, problems such as thermal seizure may occur. Especially the wear between aluminum alloys is more serious. In order to reduce the degree of wear of each sliding surface and to prevent the occurrence of thermal adhesion, a method of coating a solid lubricant with good wear resista...

Claims

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Application Information

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IPC IPC(8): C23C18/50F02F1/00F02F3/10
Inventor 须藤建次德备广太齐藤智则石井宣成牧野誉广
Owner HONDA MOTOR CO LTD
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