Air/fuel ratio control system of internal combustion engine

Details Air/fuel ratio control system of internal combustion engine Air/fuel ratio control system of internal combustion engine

1995-09-14

1996-10-15

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123491, 123686, 60285, F02D 4114

Patent

active

055644040

ABSTRACT:
A lean air/fuel ratio control device is provided for feeding the engine with a mixture of a desired lean air/fuel ratio for a given time from the time on which the engine is started. A stoichiometric air/fuel ratio control device is provided for feeding the engine with a mixture of a substantially stoichiometric air/fuel ratio once the given time passes. A temperature sensor is provided for sensing the temperature of cooling water of the engine at the time when the engine is just started. A control unit is provided for varying the given time in accordance with the temperature sensed by the temperature sensor. The given time may be varied in accordance with the activity of the oxygen sensor or the temperature of exhaust gas from the engine.

REFERENCES:
patent: 3949551 (1976-04-01), Eichler et al.
patent: 4222236 (1980-09-01), Hegedus et al.
patent: 4388803 (1983-06-01), Furuya et al.
patent: 4706633 (1987-11-01), Nakagawa
patent: 5211011 (1993-05-01), Nishikawa et al.
patent: 5483946 (1996-01-01), Hamburg et al.

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