Air-fuel ratio control system for multicylinder engine

Details Air-fuel ratio control system for multicylinder engine Air-fuel ratio control system for multicylinder engine

1985-05-24

1987-11-03

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, F02D 4114

Patent

active

047037350

ABSTRACT:
The plurality of cylinders of a multicylinder engine are divided into first group cylinders and second group cylinders, and first and second exhaust sensors are provided to respectively detect the air-fuel ratios of the intake mixtures fed to the first group cylinders and second group cylinders. The air-fuel ratio for the first group cylinders is controlled in a closed loop by a first integration signal generated based on the output of the first exhaust sensor and the air-fuel ratio for the second group cylinders is controlled in a closed loop by a second integration signal generated based on the output of the second exhaust sensor. One of the first and second integration signals is corrected so that the air-fuel ratios for the first group cylinders and second group cylinders are increased and reduced in phases reverse to each other.

REFERENCES:
patent: 4383515 (1983-05-01), Higashiyama et al.

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