Control device of gas sensor

Details Control device of gas sensor Control device of gas sensor

2006-08-29

2006-08-29

Larkin, Daniel S. (Department: 2856)

Measuring and testing

Gas analysis

By thermal property

C073S023200, C073S023210, C073S025050, C073S031050

Reexamination Certificate

active

07096717

ABSTRACT:
When the ignition switch of a vehicle is turned OFF, a purging process for increasing the flow of an off-gas fluidizing in each of the outlet side pipings of a fuel cell and discharging water remaining in a fuel cell system to an outside is started to be executed, and the amount of current conductance to the heater of the gas sensor is increased synchronously with the start of the execution of the purging process. With the completion of the purging process, the fluidization of the off-gas in each of the outlet side pipings stops, and the amount of current conductance to each of the units of the gas sensor (for example, an electrifying voltage) is gradually decreased depending on a predetermined current conductance reducing amount which is preset, thereby stopping the current conductance to each of the units and the amount of current conductance to the heater is gradually decreased, thereby stopping the current conductance to the heater.

REFERENCES:
patent: 4045177 (1977-08-01), McNally
patent: 4063447 (1977-12-01), Mathison
patent: 4951507 (1990-08-01), Takahashi et al.
patent: A-6-223850 (1994-08-01), None

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