GAS SENSOR INCLUDING SENSOR ELEMENT, HOUSING, AND ELEMENT COVER

Title:

GAS SENSOR INCLUDING SENSOR ELEMENT, HOUSING, AND ELEMENT COVER

Document Type and Number:

WIPO Patent Application WO/2016/002699

Kind Code:

A1

Abstract:

　Provided is a gas sensor (1) provided with a sensor element (2) having a measuring electrode (22) and a reference electrode (23), a housing (3) having the sensor element (2) inserted into the interior thereof, and an element cover (4) arranged on the front end side of the housing (3). The element cover has an inner cover (41), and an outer cover (42) arranged so as to cover the inner cover (41). The inner cover (41) has an inner side wall portion (411) along the axial direction (Z), and an inner bottom wall portion (412) intersecting the axial direction (Z). The outer cover (42) has an outer side wall portion (421) along the axial direction (Z), and an outer bottom wall portion (422) intersecting the axial direction (Z). Inner side surface holes formed in the inner side wall portion (411) are located further toward the basal end side than is the measuring electrode, outer side surface holes formed in the outer side wall portion (421) are located further toward the distal end side than are the inner side surface holes, inner bottom surface holes are located further toward the distal end than is the measuring electrode, and outer bottom surface holes are located further outward than are the inner bottom surface holes. The ratio of the total surface area of the outer side surface holes and the total surface area of the inner bottom surface holes is 8-47, and the total surface area of the inner side surface holes is 2-8 mm2.

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Inventors:

MIZUTANI KEISUKE (JP)
TSUJI NOBUYUKI (JP)

Application Number:

PCT/JP2015/068638

Publication Date:

January 07, 2016

Filing Date:

June 29, 2015

Export Citation:

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Assignee:

DENSO CORP (JP)

International Classes:

G01N27/409; G01N27/41

Foreign References:

JP2007033425A	2007-02-08
JP2007101353A	2007-04-19
JP2009145268A	2009-07-02
JP2007017453A	2007-01-25
JP2001228112A	2001-08-24

Attorney, Agent or Firm:

KIKUCHI, YASUHIRO (JP)
Yasuhiro Kikuchi (JP)

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