Internal-combustion engines – Charge forming device – Having fluidic logic control means
Patent
1986-09-22
1987-05-19
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Having fluidic logic control means
123489, 204425, F02B 300
Patent
active
046658742
ABSTRACT:
An oxygen concentration sensing device and an air/fuel ratio control system for an internal combustion engine which include a pair of solid electrolyte members having oxygen ion permeability which are arranged to face each other to form a restricted region between them. One of the solid electrolyte members is operative as an oxygen pump element when a pump current is supplied across the electrodes thereof. The sensing device is provided with a current supply part including a limit command circuit which generates a current stop command signal when the magnitude of the pump current exceeds a reference limit level. With the current stop command signal, the supply of the pump current is stopped so as to prevent an overcurrent to the oxygen pump element. The air/fuel ratio control system includes an air/fuel ratio detection part and an air/fuel ratio control part operated by an air/fuel ratio detection signal. The detection of the air/fuel ratio and the supply of the pump current are stopped under a predetermined operating condition of the engine.
REFERENCES:
patent: 4344317 (1982-08-01), Hahori
patent: 4354468 (1980-10-01), 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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