US 11,656,151 B2
Sensor
Yusuke Watanabe, Nagoya (JP); Shotaro Niizuma, Nagoya (JP); Hayami Aota, Nagoya (JP); Toshihiro Hirakawa, Nagoya (JP); and Kirari Takahashi, Nagoya (JP)
Assigned to NGK INSULATORS, LTD., Nagoya (JP)
Filed by NGK Insulators, Ltd., Nagoya (JP)
Filed on Mar. 21, 2022, as Appl. No. 17/699,836.
Claims priority of application No. JP2021-058946 (JP), filed on Mar. 31, 2021; and application No. JP2022-017927 (JP), filed on Feb. 8, 2022.
Prior Publication US 2022/0316985 A1, Oct. 6, 2022
Int. Cl. G01M 15/10 (2006.01); F01N 13/00 (2010.01)
CPC G01M 15/102 (2013.01) [F01N 13/008 (2013.01); F01N 2560/026 (2013.01); F01N 2560/20 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A sensor comprising:
a sensor element that includes a built-in heater and extends in a longitudinal direction; and
a housing that is formed so as to extend in the longitudinal direction and surround the sensor element,
wherein the sensor element includes a front end portion and a rear end portion,
the heater includes a heat generation portion and a lead portion,
the heat generation portion has a front end and a rear end, and is positioned on the same side as the front end portion side of the sensor element,
the housing includes an enlarged diameter portion that is formed so that a diameter of an inner wall of the housing increases in a direction toward the front end of the sensor, in a cross section that is parallel to an axis that extends in the longitudinal direction,
the enlarged diameter portion includes a front end portion and a rear end portion, and
the rear end of the heat generation portion is located closer to the front end of the sensor than the rear end portion of the enlarged diameter portion is.