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US 2001/0017057 A1Published application
Gas sensor
AssigneeDenso Corporation
InventorsKenji Fukaya, Masanobu Yamauchi
Life of this patent
Estimating the term…
Abstract
A gas sensing element comprises a solid electrolytic element, a measured gas sensing electrode provided on an outer surface of the solid electrolytic element, and a reference gas sensing electrode facing a reference gas chamber. A heater is accommodated in the reference gas chamber. A contact portion is provided on an outer cylindrical surface of the heater so that the contact portion is brought into contact with an inside surface of the solid electrolytic element defining the reference gas chamber. A heating peak position of the heater is in the vicinity of the contact portion.
Claims5
A gas sensor comprising:
- a gas sensing element including a cup-shaped cylindrical solid electrolytic element having a reference gas chamber defined therein, a measured gas sensing electrode provided on an outer surface of said solid electrolytic element, and a reference gas sensing electrode provided on an inner surface of said solid electrolytic element facing said reference gas chamber, and
- a heater accommodated in said reference gas chamber,
- wherein a contact portion is provided on an outer cylindrical surface of said heater so that said contact portion is brought into contact with an inside surface of said reference gas chamber, and
- a heat generating peak position of said heater is in the vicinity of said contact portion.
1 more element
A gas sensor comprising:
- a gas sensing element including a cup-shaped cylindrical solid electrolytic element having a reference gas chamber defined therein, a measured gas sensing electrode provided on an outer surface of said solid electrolytic element, and a reference gas sensing electrode provided on an inner surface of said solid electrolytic element facing said reference gas chamber, and
- a heater accommodated in said reference gas chamber,
- wherein said heater has a heat generating section for generating heat in response to electric power supplied thereto, and
- an electric resistive value of said heat generating section is maximized in the vicinity of a contact portion where said heater is brought into said gas sensing element.
1 more element
A gas sensor comprising:
- a gas sensing element including a cup-shaped cylindrical solid electrolytic element having a reference gas chamber defined therein, a measured gas sensing electrode provided on an outer surface of said solid electrolytic element, and a reference gas sensing electrode provided on an inner surface of said solid electrolytic element facing said reference gas chamber, and
- a heater accommodated in said reference gas chamber,
- wherein a heat generating section of said heater has a heater line pattern whose density is maximized in the vicinity of a contact portion where said heater is brought into said gas sensing element.
A gas sensor comprising:
- a gas sensing element including a cup-shaped cylindrical solid electrolytic element having a reference gas chamber defined therein, a measured gas sensing electrode provided on an outer surface of said solid electrolytic element, and a reference gas sensing electrode provided on an inner surface of said solid electrolytic element facing said reference gas chamber, and
- a heater accommodated in said reference gas chamber,
- wherein said heater has a heat generating section for generating heat in response to electric power supplied thereto, and
- said heat generating section has a high resistive portion provided closer to a proximal end of the gas sensor.
1 more element
A gas sensor comprising:
- a gas sensing element including a cup-shaped cylindrical solid electrolytic element having a reference gas chamber defined therein, a measured gas sensing electrode provided on an outer surface of said solid electrolytic element, and a reference gas sensing electrode provided on an inner surface of said solid electrolytic element facing said reference gas chamber, and
- a heater accommodated in said reference gas chamber,
- wherein said heater has a heat generating section for generating heat in response to electric power supplied thereto,
- a contact portion is provided on an outer cylindrical surface of said heater so that said contact portion is brought into contact with an inside surface of said reference gas chamber, and
- a heat generating peak position of said heater appears within ¾ of a line segment extending between a distal end of a heat generating pattern closer to said contact portion and a center of said heat generating pattern for more than one fifth of a time required for the heat generating peak position of the heater to reach 900° C.
2 more elements
Dependencies are inferred from the claim text.