Internal-combustion engines – Charge forming device – Having fluidic logic control means
Patent
1980-10-22
1982-11-16
Lall, P. S.
Internal-combustion engines
Charge forming device
Having fluidic logic control means
204195S, F02M 700
Patent
active
043590306
ABSTRACT:
A system for feedback control of air/fuel ratio in an IC engine, utilizing an oxygen-sensitive device which is provided with a heater and disposed in exhaust gas to provide a feedback signal. This device has a porous solid electrolyte layer with an outer electrode layer on one side and an inner electrode on the other side facing a substrate. There is a circuit to supply a heating current to the heater and also force a DC current to flow in the solid electrolyte layer to cause migration of oxygen ions therethrough toward the inner electrode to thereby establish a reference oxygen partial pressure on the inner side of the solid electrolyte layer. This circuit is provided with current intensity regulation means to temporarily decrease the intensity of the current flowing in the solid electrolyte layer by a predetermined value while the oxygen-sensitive device is not sufficiently heated to thereby preclude undesirable rise of the basic level of the output voltage of the oxygen-sensitive device by the effect of an increased internal resistance of the not sufficiently heated element.
REFERENCES:
patent: 3915135 (1975-10-01), Kushida et al.
patent: 4107019 (1978-08-01), Takao et al.
patent: 4112893 (1978-09-01), Anzai
patent: 4140085 (1979-02-01), Rabus et al.
patent: 4207159 (1980-06-01), Kimura et al.
Okamura Kenji
Sone Kohki
Lall P. S.
Nissan Motor Company Limited
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