EP0273765A2
Expired / Lapsed
EP
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Apparatus for evaluating an oxygen sensor
Assignee: Niterra Co Ltd
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Filing: 1987-12-29
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Granted: —
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Expires: 2007-12-29
Abstract
Abstract An apparatus for evaluating an oxygen sensor includes a device for mixing a fuel and an oxygen-containing gas in an appropriate ratio to prepare a fuel mixture. A burner is connected to the mixing device for burning the fuel mixture to produce a gaseous combustion product. A tubular member extends from the burner for supplying the combustion product. A nozzle is connected to the tubular member for introducing a fuel and an oxygen-containing gas into the tubular member so that the combustion product may have a desired excess air ratio (air-fuel ratio) and a mounting device of the sensor to be evaluated is disposed, at a point downstream of the nozzle, on the tubular member.
Inventors
- 👤 Akio c/o NGK SPARK PLUG CO.LTD. Takami
- 👤 Ken c/o NGK SPARK PLUG CO.LTD. Minoha
- 👤 Mineji c/o NGK SPARK PLUG CO.LTD. Nasu
- 👤 Toshifumi c/o NGK SPARK PLUG CO.LTD. Sekiya
- 👤 Akio c/o NGK SPARK PLUG CO.LTD. Mizutani
- 👤 Noriaki c/o NGK SPARK PLUG CO.LTD. Kondo
- 👤 Toshitaka c/o NGK SPARK PLUG CO.LTD. Matsuura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 19:59
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/007; G01N33/0006
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
110 words
An apparatus for evaluating an oxygen sensor comprising: a device for mixing a fuel and an oxygen-containing gas in an appropriate ratio to prepare a fuel mixture; a burner connected to said mixing device for burning said mixture to produce a geasous combustion product; a tubular member extending from said burner for supplying said combustion product; a nozzle connected to said tubular member for introducing a fuel and an oxygen-containing gas into said tubular member so that said combustion product may have a desired excess air ratio; and a mounting device of said sensor to be evaluated and disposed, at a point downstream of said nozzle, on said tubular member.
Claim 2
Independent Claim
110 words
An apparatus for evaluating an oxygen sensor comprising: a device for mixing a fuel and an oxygen-containing gas in an appropriate ratio to prepare a fuel mixture; a burner connected to said mixing device for burning said mixture to produce a geasous combustion product; a tubular member extending from said burner for supplying said combustion product; a nozzle connected to said tubular member for introducing a fuel and an oxygen-containing gas into said tubular member so that said combustion product may have a desired excess air ratio; and a mounting device of said sensor to be evaluated and disposed, at a point downstream of said nozzle, on said tubular member.
Claim 3
Dependent Claim
39 words
An apparatus as claimed in claim 1, wherein said apparatus further comprises a flow control device for controlling the excess air ratio at said nozzle so that the excess air ratio substantially equal with said desired excess air ratio.
Claim 4
Dependent Claim
58 words
An apparatus as claimed in claim 2, wherein said apparatus further comprised a standard oxygen sensor disposed, near said mounting portion of said oxygen sensor to be evaluated, on said tubular member, said standard oxygen sensor substantially equalizing said excess air ratio at said nozzle with said desired excess air ratio in cooperation with said flow control device.
Claim 5
Dependent Claim
56 words
An apparatus as claimed in claim 2, wherein said apparatus further comprises a gas analyzer disposed downstream of said mounting device of said oxygen sensor to be evaluated, said gas analyzer substantially equalizing said excess air ratio at a portion of said nozzle with said desired excess air ratio in cooperation with said flow control device.
Claim 6
Dependent Claim
95 words
An apparatus as claimed in claim 1, wherein said apparatus further comprising; a second nozzle to supply air into said tubular member disposed, between said burner and said nozzle, on said tubular member; a second flow control device for substantially equalizing a value of an excess air ratio at said second nozzle with a predetermined value by sensing an excess air ratio at a downstream of said second nozzle; and a third flow control device for substantially equalizing an excess air ratio of the mixture supplied to said burner with a predetermined excess air ratio.
Claim 7
Dependent Claim
29 words
An apparatus as claimed in claim 5, wherein said third flow control device includes an oxygen sensor, at a upstream portion of said second nozzle, on said tubular member.
Claim 8
Dependent Claim
28 words
An apparatus as claimed in claim 5, wherein said second flow control device includes an oxygen sensor between said nozzle and said second nozzle, on said tubular member.
Claim 9
Dependent Claim
24 words
An apparatus as claimed in claim 1, wherein flow speed of said gaseous combustion product in said tubular member is greater than 5 m/sec.
References Cited (Backward Citations)
No citation records indexed.
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