Air-fuel ratio control method for internal combustion engines

Details Air-fuel ratio control method for internal combustion engines Air-fuel ratio control method for internal combustion engines

1991-10-24

1992-11-24

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123478, F02D 4114

Patent

active

051653818

ABSTRACT:
An air-fuel ratio control method for an internal combustion engine. An amount of fuel to be supplied to the engine is calculated in response to operating conditions of the engine and output from an exhaust gas ingredient concentration sensor, to thereby feedback-control the air-fuel ratio of a mixture supplied to the engine to a desired air-fuel ratio. The method comprises the steps of (1) calculating a fuel cooling correction value for compensating for a change in an actual air-fuel ratio caused by cooling effects of actually-injected fuel, according to at least one parameter which can determine the amount of fuel to be supplied to the engine, and (2) calculating the amount of fuel to be supplied to the engine by the use of the fuel cooling correction value.

REFERENCES:
patent: 4357923 (1982-11-01), Hideg
patent: 4424783 (1984-01-01), Kotwicki
patent: 4594986 (1986-06-01), Shimoda et al.
patent: 4886027 (1989-12-01), Orrell et al.

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