Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1989-04-21
1990-08-28
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Fuel injection system
123440, 204431, F02D 4114, F02B 300, F02M 700
Patent
active
049516329
ABSTRACT:
A method of detecting failure of an exhaust gas component concentration sensor for detecting concentration of a component of exhaust gases from an internal combustion engine. The method comprises the steps of: (1) applying a predetermined voltage to the sensor, (2) determining whether or not a change in an output voltage from the sensor caused by the application of the predetermined voltage to the sensor is smaller than a predetermined value, and (3) deciding that the sensor is faulty when the change in the output voltage is smaller than the predetermined value. A device for sensing concentration of a component of exhaust gases from an internal combustion engine comprising an electric resistance member connected in series between an electric current supply source and one of a pair of electrodes provided on a solid electrolytic element. A device for detecting failure of an exhaust gas component concentration sensing device comprising a constant voltage supply source for applying a predetermined voltage to the sensing device, and a switch connected between the constant voltage supply source and one of a pair of electrodes provided on an electrolytic element of the sensing device, for applying the predetermined voltage to the one of the electrodes when the switch is closed.
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Igarashi Hisashi
Kawanabe Tomohiko
Ohno Hiroshi
Yakuwa Masahiko
Honda Giken Kogyo K.K.
Lessler Arthur L.
Nelli Raymond A.
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