Control device for an air-fuel ratio sensor

Details Control device for an air-fuel ratio sensor Control device for an air-fuel ratio sensor

G - Physics

01

N

G01N 27/417 (2006.01) F02D 41/14 (2006.01) G01F 9/00 (2006.01) G01N 27/409 (2006.01)

Patent

CA 2299933

A control device detects a characteristic change of an air-fuel ratio sensor indicative of deterioration of the air-fuel ratio sensor. The control device determines deterioration due to aging of the air-fuel ratio sensor accurately and calculates an air-fuel ratio from the air-fuel ratio sensor highly accurately. Then, the control device detects a current proportional to the concentration of oxygen in the detected gas from a sensor element by applying a voltage to the sensor element of the air-fuel ratio sensor. By applying AC voltages at high and low frequencies to the element, an AC impedance is detected. The temperature of the element is controlled to a target temperature according to the high frequency impedance and a characteristic change of the element is detected in accordance with the low frequency impedance.

Affiliated with

Also associated with

Rating

Control device for an air-fuel ratio sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control device for an air-fuel ratio sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control device for an air-fuel ratio sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1683854