# US 12,007,300 B2 · Gas sensor

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- Number: US 12,007,300 B2
- Document ID: US12007300B2
- Status: Granted
- Kind: B2
- Application number: 17/587,942
- Filed: 2022-01-28
- Published: 2022-05-19
- Granted: 2024-06-11
- Earliest claimed: 2019-07-31
- Assignees: Denso Corporation
- Applicants: Denso Corporation
- Inventors: Nobuyuki Tsuji
- Web page: https://patentgrep.com/patent/US12007300B2

## CPC

- G01M 15/102: {by monitoring exhaust gases}
- G01N 27/4078: {Means for sealing the sensor element in a housing}
- F01N 2560/02: the means being an exhaust gas sensor
- F02D 41/1438: {using means for determining characteristics of the combustion gases; Sensors therefor}
- F02D 41/222: {relating to the failure of sensors or parameter detection devices}
- G01M 15/10: by monitoring exhaust gases {or combustion flame}
- G01N 27/407: for investigating or analysing gases {(G01N27/411 takes precedence)}
- G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)

## Abstract

A gas sensor includes a housing including a locking step part, a sensor body including a locked part locked to the locking step part, a sealing member filled between an inner periphery of the housing and an outer periphery of the sensor body on a base end side of the locked part, an insulating member disposed on the base end side of the sealing member, and a circular disc spring pressing a base end surface of the insulating member. The housing includes a caulking part caulking the circular disc spring to cover the circular disc spring. The elastically compressed circular disc spring is disposed between the caulking part and the insulating member. At least part of a base end side pressing part, at which the caulking part presses the circular disc spring, is disposed between an inner and outer periphery edges of the base end surface of the insulating member.

## Claims

### Claim 1

A gas sensor, comprising:
a housing that includes a locking step part formed on an inner periphery of the housing;
a sensor body that includes a locked part locked to the locking step part from a base end side and is held inside the housing;
a sealing member that is filled between the inner periphery of the housing and an outer periphery of the sensor body on the base end side of the locked part;
an insulating member that is disposed between the inner periphery of the housing and the outer periphery of the sensor body on the base end side of the sealing member; and
a circular disc spring that presses a base end surface of the insulating member, wherein
the housing includes a caulking part that caulks the circular disc spring so as to cover the circular disc spring from the base end side,
the circular disc spring is disposed between the caulking part and the insulating member in a state in which the circular disc spring is elastically compressed,
at least part of a base end side pressing part, at which the caulking part presses the circular disc spring, is disposed between an inner periphery edge and an outer periphery edge of the base end surface of the insulating member,
an outer periphery edge of the base end side pressing part is formed on an outer periphery side with respect to an inner periphery edge of a tip end side pressing part at which the circular disc spring presses the base end surface of the insulating member, and
an inner periphery edge of the base end side pressing part is disposed on an inner periphery side with respect to the outer periphery edge of the base end surface of the insulating member, and
a wedge-shaped gap is formed between the circular disc spring and the base end surface of the insulating member on the outer periphery side of the tip end side pressing part.

### Claim 2 (depends on 1)

The gas sensor according to claim 1, wherein
when viewed in an axial direction, the circular disc spring is located so that the whole of the circular disc spring overlaps with the base end surface of the insulating member.

### Claim 3 (depends on 1)

The gas sensor according to claim 1, wherein:
the circular disk spring is a first circular disk; and
wherein a second circular disc spring is inclined with respect to the first circular disc spring and is disposed adjacent to said first circular disc spring.

### Claim 4 (depends on 1)

The gas sensor according to claim 1, wherein:
a radially-outer peripheral surface of the circular disk spring is farther away from the base end surface of the insulating member than a radially-inner peripheral surface of the circular disk spring in an axial direction of the gas sensor.