Piston for internal combustion engine

An internal combustion engine and piston technology, which is applied in the field of pistons for internal combustion engines, can solve problems such as fracture, hindering the high rotation or compactness of the engine, and increasing the weight.

Inactive Publication Date: 2002-12-11
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the lower part of the skirt 7 protrudes much downward as in the example of the prior art as described above, the weight is increased by it, and therefore, there is a problem that it hinders the high rotation speed or compactness of the engine.
The same problem also exists when the circumferential width of the skirt is large
[0006] In addition, if sufficient lubrication cannot be provided even if an oil supply hole is provide

Method used

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  • Piston for internal combustion engine
  • Piston for internal combustion engine
  • Piston for internal combustion engine

Examples

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Embodiment Construction

[0022] An embodiment will be described below with reference to the drawings. Fig. 1 is the front view (A arrow direction of Fig. 3) of the present embodiment piston, figure 2 It is a bottom view showing a half section from a piston pin seat to a skirt, and FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 1 . Figure 4 It is a sectional view of line 4-4 in FIG. 3 . Figure 5 It is an enlarged view of part B of FIG. 3 . Common symbols are used for parts common to the conventional example of FIG. 6 .

[0023] In FIG. 1, a first gas ring groove 2 is formed around the side surface of a crown 1, and an oil ring groove 4 is formed below it. On the bottom of the oil ring groove 4 , oil supply holes 5 are formed to penetrate inside and outside at appropriate intervals, and oil is supplied from the inner side of the piston to the surface side through the oil supply holes 5 . A pair of piston pin seat portions 6 and a skirt portion 7 are formed at the bottom of the crown...

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Abstract

The invention discloses a piston for an internal combustion engine. The piston for high rotation is formed through lighter weight and compactness. A first air ring groove 2 and an oil ring groove 4 are formed around the crown 1, and an oil supply hole 5 is provided inside the oil ring groove 4, and a pair of air ring grooves 5 are arranged at positions opposite to the bottom of the crown 1 continuously. The piston pin seat 6 is provided with a skirt 7 staggered by 90 degrees from the piston pin seat 6, the lower end 12 of the skirt 7 is located above the lower end 11 of the piston pin 6, and on the upper part of the skirt 7, the oil An oil supply hole 10 is provided below and near the ring groove 4 .

Description

technical field [0001] The present invention relates to a piston for an internal combustion engine, and more particularly to a piston for an internal combustion engine suitable for high rotational speed and compactness. Background technique [0002] Existing pistons for internal combustion engines have a crown, a piston pin seat integrally formed with the crown, and a pair of skirts oppositely arranged, and grooves for piston rings are formed around the crown (as an example, refer to Japan Real Fair 7-7570). FIG. 6 shows such a conventional structure. A first air ring groove 2, a secondary ring groove 3, and an oil groove 4 are arranged around the crown portion 1, and piston rings omitted from the figure are respectively fitted in them. The bottom of the oil ring groove 4 is formed with an oil supply hole 5 penetrating inside and outside. [0003] Reference numeral 6 is a piston pin seat portion, 7 is a skirt portion, and the lower end of the skirt portion 7 extends downwa...

Claims

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Application Information

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IPC IPC(8): F01M1/06F01M11/02F02F3/00F16J1/00F16J1/08F16J1/09F16J1/16
CPCF01M2011/025F02F3/00F16J1/08
Inventor 野村明史志村康雄
Owner HONDA MOTOR CO LTD
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