Method and system for internal combustion engine oxygen sensor h

Details Method and system for internal combustion engine oxygen sensor h Method and system for internal combustion engine oxygen sensor h

1984-10-30

1987-04-07

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

123489, F02D 4114

Patent

active

046551824

ABSTRACT:
An internal combustion engine has an exhaust system and an oxygen sensor fitted to the exhaust system including a sensor element and an electrically powered heater for heating the sensor element. A method for controlling the electrical power supplied to the heater properly and quickly heats up the sensor element after engine starting from the cold condition. At the time of starting up the engine it is determined whether or not the temperature of the engine is less than a certain value. If so, the heater is provided with electrical power to the maximum practicable amount, for a certain time interval after the engine is started up. Thereby, during engine heating up operation, the temperature of the sensor element is brought up to its minimum proper operating temperature as quickly as practicable, and accordingly it is ensured that engine performance and the quality of exhaust gas emissions at the time of such engine warming up operation are good. A system is also described for implementing this method.

REFERENCES:
patent: 4033170 (1977-07-01), Kawamura et al.
patent: 4170967 (1979-10-01), Wessel et al.
patent: 4178793 (1979-12-01), Bremer et al.
patent: 4198939 (1980-04-01), Masaki
patent: 4314537 (1982-02-01), Asano et al.
patent: 4332225 (1982-06-01), Cox et al.
patent: 4356065 (1982-10-01), Dietz

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