Gas sensor

Abstract

This gas sensor is provided with a sensor element comprising a solid electrolyte body having an axially centered cylindrical tube part and a distal-end part for closing the distal end of the tube part, and a cylindrical or pillar-shaped heater arranged within the sensor element and adapted for heating the sensor element by radiating heat, wherein a distal-end part of the heater makes contact with an inside surface of the distal-end part of the sensor element and makes contact with an inside peripheral surface of the tube part of the sensor element.

Description

[0001] This international application claims priority based on Japanese Patent Application No. 2011-178355 filed with the Japan Patent Office on August 17, 2011, and the entire contents of Japanese Patent Application No. 2011-178355 are incorporated into this international application by reference . technical field [0002] The present invention relates to a gas sensor suitable for detecting oxygen or the like contained in exhaust gas discharged from an internal combustion engine installed in vehicles such as motorcycles and passenger cars. Background technique [0003] Conventionally, as a gas sensor for detecting the concentration of oxygen contained in exhaust gas, a sensor provided with a gas detection element having oxygen ion conductivity and mounted on an exhaust pipe of an internal combustion engine of a vehicle ( For example, refer to Patent Documents 1 to 3). [0004] The general structure of a sensor having the same structure as the gas sensor described in Patent...

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Problems solved by technology

[0015] In other words, if priority is given to early activation of the element body (sensor element) of the gas detection element P1 and the side surface of the heater P9 is brought into contact with the element body (sensor element) of the gas detection element P1, The problem of the deviation of the signal output by the element body (sensor element)

In addition, if the tip of the heater P9 is brought into contact with the element body (sensor element) of the gas detection element P1 with priority given to suppressing the variation of the signal output from the element body (sensor element) of the gas detection element P1, there is a possibility of activating the gas detection element. The problem that the time required for the element body (sensor element) of P1 becomes longer

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