Air-fuel ratio control system for internal combustion engines

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

1993-04-26

1994-10-11

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123694, F02D 4114

Patent

active

053537734

ABSTRACT:
An air-fuel ratio control system for an internal combustion engine calculates an amount of fuel to be supplied to the engine in response to the rotational speed of the engine and a parameter indicative of load on the engine, and an amount of fuel injected into an intake passage and adhering to the inner surface of the intake passage, based upon a direct supply ratio and a carry-off ratio. A feedback correction value is set to such a value that an air-fuel ratio in exhaust gases from the engine becomes equal to a desired value, and the amount of fuel calculated as above is corrected by the direct supply ratio, the carry-off ratio, and the feedback correction value set as above. A control speed at which the feedback correction value is corrected is set based upon at least one of the direct supply ratio and the carry-off ratio.

REFERENCES:
patent: 4825837 (1989-05-01), Nakagawa
patent: 4939658 (1990-07-01), Sekozawa et al.
patent: 5115782 (1992-05-01), Klinke et al.
patent: 5215061 (1993-06-01), Ogawa et al.
patent: 5239974 (1993-08-01), Ebinger et al.

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