Gas sensor control apparatus

Details Gas sensor control apparatus Gas sensor control apparatus

2011-01-18

2011-01-18

Nguyen, Vincent Q (Department: 2831)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S693000, C204S406000, C204S424000, C205S775000

Reexamination Certificate

active

07872480

ABSTRACT:
A gas sensor control apparatus for controlling a gas sensor includes a resistance detection unit and a heater control unit. The resistance detection unit detects a resistance of an object cell of the gas sensor. When the resistance of the object cell is lower than a predetermined threshold, the heater control unit controls energization of a heater such that the resistance detected by the resistance detection unit is a first predetermined resistance. Subsequently, after elapse of a predetermined time, the heater control unit further controls energization of the heater in such a manner that the resistance detected by the resistance detection unit is a second predetermined resistance of a resistance value that is higher than that of the first predetermined resistance.

REFERENCES:
patent: 6228252 (2001-05-01), Miyata et al.
patent: 2004/0047396 (2004-03-01), Nomura et al.

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