Pistons for internal combustion engines

An internal combustion engine, piston technology, applied in the direction of piston, piston ring, cylindrical piston, etc., can solve problems such as piston deformation

Active Publication Date: 2015-10-21
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem with this type of box piston is that when operating in motor mode, the forces exerted on the piston by gas pressure and ignition pressure can cause deformation of the piston

Method used

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  • Pistons for internal combustion engines
  • Pistons for internal combustion engines
  • Pistons for internal combustion engines

Examples

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Embodiment Construction

[0021] Figure 1 to Figure 4 The embodiment of the piston 10 provided by the present invention, in this embodiment, the piston is made of steel. In this embodiment, the piston 10 provided by the present invention is composed of two parts. It consists of a piston top 11 and a piston bottom 12 . The piston crown 11 has a piston head 13 containing a basin-shaped combustion chamber 13 a and a surrounding ring section 15 containing a fire bank 14 . The piston bottom 12 has a piston skirt 16 engaging the bottom surface of the piston head 13 . The piston skirt 16 has two skirt walls 17 and two box walls 18 connecting the skirt walls 17 and recessed relative to the ring section 15 . This forms the unsupported bottom surface 25 of the ring segment 15 . The outer peripheral surface of each skirt wall 17 forms a working surface of the piston skirt 16 . Each box wall 18 has a pin hub 19 provided with a hub hole 21 .

[0022] The piston top 11 and the piston bottom 12 form a circumfe...

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PUM

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Abstract

A piston for an internal combustion engine has a piston crown, a circumferential fire land, a circumferential ring part having annular grooves, and a piston skirt, which comprises two skirt walls and two box walls set back from the ring part and connecting the skirt walls in such a way that an exposed underside of the ring part is formed in the area of each of the box walls. The box walls are provided with pin bosses having pin bores. At least one support element is arranged between each exposed underside of the ring part and the box wall associated with the underside of the ring part.

Description

technical field [0001] The invention relates to a piston for an internal combustion engine, comprising a piston head, a surrounding land, a surrounding annular segment with an annular groove and a piston skirt, the piston skirt having two skirt walls and two connecting the skirt walls and A box wall that is concave relative to the ring segment and forms in each case a free bottom surface of the ring segment in the region of the box wall, wherein a pin hub with a hub hole is provided on the box wall. Background technique [0002] A piston of the same type is disclosed in International Patent Application WO 2008 / 128611 A1. The piston of this structure is also called box piston. The two opposing walls of the piston skirt of conventional box pistons are concave relative to the piston outer contour. The concave wall part is called the box wall, the other two non-concave wall parts are the skirt walls and contain the actual running surface of the piston skirt. Pin hubs with hub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/00
CPCF02F3/00F02F3/0076F16J1/00F16J9/00
Inventor W·依斯勒P·肯尼茨
Owner MAHLE INT GMBH
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