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Measurement of gaps between valve seats and attachment parts

A gap and valve seat technology, applied in the field of gap measurement devices, can solve problems such as dimensional instability

Inactive Publication Date: 2008-12-17
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Measurement of gaps between valve seats and attachment parts
  • Measurement of gaps between valve seats and attachment parts
  • Measurement of gaps between valve seats and attachment parts

Examples

Experimental program
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Effect test

Embodiment Construction

[0041] Such as figure 1 As shown, the cylinder head 11 of the engine is inverted so that the valve working chamber 12 is at the bottom and the device 20 for measuring the gap between the coupling part and the valve seat is partially inserted into the intake port 13 and the exhaust port 14 . Then, the gap between the coupling portion and the valve seat is measured using the device 20 . The intake port 13 is provided with a coupling portion 15 by cutting the side closer to the cylinder head 11, and the valve seat 16 is press-fitted into the coupling portion. The same applies to the discharge port 14 .

[0042]As shown in Figure 2, the device 20 of measuring the gap between the coupling part and the valve seat consists of a columnar body 21; ; The white light-emitting diode 25 that is arranged around the periphery of the mirror housing chamber 22 and is perpendicular to the axis 24 of the cylinder; the mirror 27 that is located at the mirror housing chamber 22 and bends the opt...

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PUM

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Abstract

An apparatus for measuring gaps that form between attachment parts (15) in exhaust ports. of an engine, and valve seats (16) provided to the attachment parts. This apparatus comprises, at one end of a cylinder (21), white light-emitting diodes (25) for emitting light orthogonal to a longitudinal axis (24) of the cylinder. An optical axis (26) from the light-emitting diodes is bent by 90 DEG by a mirror (27). Color images obtained by a CCD camera (28) provided at the other end of the cylinder are binarized by a color image processor (29) with a range of hue, a range of chroma, and a range of brightness.

Description

technical field [0001] The present invention relates to a gap measuring device for measuring a gap formed between a valve seat and a coupling portion after the coupling portion is formed in an exhaust port of an engine and the valve seat is press-fitted into the coupling portion. The invention also relates to methods of determining these gaps. Background technique [0002] The cylinder heads of the engine are provided with exhaust ports. These exhaust ports are opened and closed by intake and exhaust valves. The components that are in direct contact with the intake and exhaust valves are called valve seats. These seats must be durable. For example, a structure in which a steel valve seat is press fit in a cylinder head made of an aluminum alloy casting may be used. [0003] Specifically, a coupling portion accommodating a valve seat (hereinafter referred to as “coupling portion”) is formed in the cylinder head by cutting, and the valve seat is press-fitted into the coupl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L3/22G01B11/14
CPCF01L3/22F01L2820/01F01L2820/02G01B11/14F01L2303/01F01L2303/00
Inventor 蟹泽光浩坪来光男
Owner HONDA MOTOR CO LTD