Internal-combustion engines – Charge forming device – Having fluidic logic control means
Patent
1986-09-18
1988-01-26
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Having fluidic logic control means
123489, 204424, F02D 500
Patent
active
047210842
ABSTRACT:
Method for controlling an oxygen concentration sensor for sensing an oxygen concentration in an exhaust gas of an internal combustion engine, which sensor includes an oxygen pump element and a heater element, comprises steps for controlling a pump current and a heat current control in response to a result of a detection of engine load. When the engine is operating in a predetermined high load range, the supply of the pump current to the oxygen pump element is stopped, and the heat current to the heater element is reduced when the engine operation in the high load range has continued for more than a predetermined time period. The heater current to the heater element is stopped when the engine load is in a first predetermined load range, and when the engine operation in a second load range which is lighter than the first load range has continued for a predetermined time period.
REFERENCES:
patent: 4344317 (1982-08-01), Hahori
patent: 4354468 (1982-10-01), Sone
patent: 4359030 (1982-11-01), Sone
patent: 4365604 (1982-12-01), Sone
patent: 4548179 (1985-10-01), Ninomiya
Asakura Masahiko
Hasebe Hiroshi
Kawanabe Tomohiko
Kimura Katsuhiko
Kushida Noritaka
Cox Ronald B.
Honda Giken Kogyo Kabushiki Kaisha
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