Air-fuel ratio control device of an internal combustion engine

Details Air-fuel ratio control device of an internal combustion engine Air-fuel ratio control device of an internal combustion engine

1991-01-22

1992-01-14

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123493, F02D 4102, F02D 4112

Patent

active

050800744

ABSTRACT:
An air-fuel ratio control device comprising a memory which stores the relationship between the degree of opening of the throttle valve and the absolute pressure in the intake passage, which pressure is produced when the engine is in a cruising state. When a difference between the blunt value of the actual absolute pressure in the intake passage and the absolute pressure stored in the memory exceeds a fixed value, the air-fuel mixture is changed from the mixture for the stoichiometric air-fuel ratio to a lean mixture.

REFERENCES:
patent: 4528956 (1985-07-01), Ogata et al.
patent: 4616619 (1986-10-01), Saito et al.
patent: 4644923 (1987-02-01), Morita et al.

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