Title:
【発明の名称】空燃比センサ
Document Type and Number:
Japanese Patent JPH07111412
Kind Code:
B2
Abstract:
An air-fuel ratio sensor in which the temperature dependence as well as the pressure dependence of a detection signal obtained by the air-fuel ratio sensor are suppressed to thereby improve the accuracy in air-fuel ratio by the air-fuel ratio sensor, which is not influenced by deposits in an exhaust gas and which is high in durability. The suppression is achieved by using a gas-diffusion limiting portion having such critical parameters as 10-30% porosity, 1-3 micrometers mean pore size and 200-1000 micrometers thickness. Alternatively the parameters may be 15-25% porosity, 0.1-7 micrometers pore size and 400-800 micrometers thickness.
Inventors:
Tetsumasa Yamada
Nobuhiro Hayakawa
Yokota Kazunori
Nobuhiro Hayakawa
Yokota Kazunori
Application Number:
JP31337486A
Publication Date:
November 29, 1995
Filing Date:
December 27, 1986
Export Citation:
Assignee:
Nippon Special Ceramics Co., Ltd.
International Classes:
G01N27/419; G01N27/406; G01N27/409; G01N27/41; G01N27/413; G01N27/416; G01N27/417; G01N33/00; (IPC1-7): G01N27/41
Domestic Patent References:
| JP5748648A | ||||
| JP6017452U |
Attorney, Agent or Firm:
Adachi Tsutomu