Patent ID: 6258232
Filing Date: 2001-07-10
Classification: F02D,G01N

Abstract:
A gas component concentration measuring apparatus comprising:a sensor, including a sensor element made of a solid electrolyte, for measuring a concentration of a specific gas component to be measured;a heater for heating said sensor element according to a current supply;heater control means for controlling said current supply to said heater during a heating of said sensor element from a cold, inactive state to a hot, activated state, in accordance with a temperature increasing rate of said sensor element, thereby to control the temperature increasing rate of the sensor element to not exceed a predetermined temperature increasing rate; andsensor changing rate determining means for detecting one of temperature and resistance of said sensor element, and for determining a changing rate of said detected one of temperature and resistance, wherein:said heater control means controls said current supply to said heater in accordance with said changing rate determined by said sensor changing rate determining means.