Measuring and testing – Simulating operating condition – Marine
Patent
1998-04-07
2000-08-01
Dombroske, George
Measuring and testing
Simulating operating condition
Marine
73 2332, 60276, 701109, 123688, F02D 4500, G01M 1500
Patent
active
060949759
ABSTRACT:
In a system using a gas concentration sensor such as an A/F sensor having a heater, a microcomputer detects an abnormality in a heater power supply control. After the detection of abnormality, the computer reduces the electric power to the heater to a minimum and determines whether the heater has restored its normal operation. The power supply to the heater is stopped and returned to the normal power supply control when it is determined that the detected abnormality continues and discontinues during the reduced power supply period, respectively.
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Hasegawa Jun
Yamashita Yukihiro
Denso Corporation
Dombroske George
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