Internal-combustion engines – Charge forming device – Having fluidic logic control means
Patent
1982-08-12
1984-03-06
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Having fluidic logic control means
123489, F02M 718
Patent
active
044347642
ABSTRACT:
An air/fuel ratio feedback control system for internal combustion engines, which includes: a fail safe device comprising at least one of a first failure detecting means for detecting whether no inversion occurs in the output level of the O.sub.2 sensor over a predetermined period of time during air/fuel ratio feedback control dependent upon the O.sub.2 sensor output when the O.sub.2 sensor is activated, and a second failure detecting means for detecting whether no activation of the O.sub.2 sensor occurs over a second predetermined period of time after the engine temperature has risen above a predetermined value during the above feedback control; and means for rendering the fail safe device inoperative when a detected value of ambient atmospheric pressure is lower than a predetermined value.
REFERENCES:
patent: 3948228 (1976-04-01), Luchaco
patent: 4121548 (1978-10-01), Hattori et al.
patent: 4214308 (1980-07-01), Carp
patent: 4376431 (1983-03-01), Yokooku et al.
patent: 4383409 (1983-05-01), Otsuka et al.
patent: 4393842 (1983-07-01), Otsuka et al.
Hasegawa Shumpei
Narasaka Shin
Otsuka Kazuo
Argenbright Tony M.
Honda Motor Co. Ltd.
Lessler Arthur L.
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