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Gas sensor, and internal combustion engine and transportation apparatus incorporating the same

A gas sensor, oxide semiconductor technology, applied in the direction of material resistance, etc., can solve the problems of complex oxygen sensor structure, complex oxygen sensor structure, complex structure and so on

Inactive Publication Date: 2007-11-14
YAMAHA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the structure of the oxygen sensor itself becomes complicated, and at the same time, the structure for installing the oxygen sensor in the exhaust pipe is also complicated.
Moreover, since the structure becomes complicated, there is also a problem that it is difficult to miniaturize the oxygen sensor

Method used

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  • Gas sensor, and internal combustion engine and transportation apparatus incorporating the same
  • Gas sensor, and internal combustion engine and transportation apparatus incorporating the same
  • Gas sensor, and internal combustion engine and transportation apparatus incorporating the same

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Embodiment Construction

[0054] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiments.

[0055] First, the configuration of the gas sensor 10 according to the present embodiment will be described with reference to FIGS. 1 and 2 . 1 and 2 are respectively an exploded perspective view and a cross-sectional view schematically showing the gas sensor 10 . The gas sensor 10, as shown in FIGS. 1 and 2, is a resistive oxygen sensor including an oxide semiconductor layer 11 formed of an oxide containing cerium and a detection electrode 12 for detecting the resistivity of the oxide semiconductor layer 11. .

[0056]The oxide semiconductor layer 11 and the detection electrode 12 are supported by a substrate 13 . The substrate 13 is formed of an insulator such as alumina and magnesia. The substrate 13 has a main surface 13 a and a back surface 13 b facing each other, and the oxide semicondu...

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Abstract

A gas sensor according to the present invention is a resistance-type gas sensor including: an oxide semiconductor layer (11) composed of an oxide containing cerium (11a,11b); and detection electrodes (12) for detecting the resistivity of the oxide semiconductor layer. The oxide semiconductor layer includes an alumina-containing layer (11a) in which alumina is contained, and the detection electrodes (12) are disposed in contact with the alumina-containing layer (11a).

Description

technical field [0001] The present invention relates to a gas sensor, and particularly to a resistance gas sensor including an oxide semiconductor layer. In addition, the present invention relates to an internal combustion engine and transportation equipment equipped with such a gas sensor. Background technique [0002] From the standpoint of environmental problems and energy problems, it is required to improve the fuel efficiency of internal combustion engines and to reduce the restricted substances (NO) contained in the exhaust gas of internal combustion engines x etc.) emissions are reduced. Therefore, in order to always burn fuel under optimum conditions, it is necessary to properly control the ratio of fuel to air according to the combustion state. The ratio of air to fuel is called the air-fuel ratio (A / F). In the case of using a three-way catalyst, the best air-fuel ratio is the theoretical air-fuel ratio. The theoretical air-fuel ratio refers to an air-fuel ratio ...

Claims

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Application Information

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IPC IPC(8): G01N27/12
CPCG01N27/12
Inventor 大堀德子
Owner YAMAHA MOTOR CO LTD
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