Air-fuel ratio controller for water-cooled engine

Details Air-fuel ratio controller for water-cooled engine Air-fuel ratio controller for water-cooled engine

1991-11-29

1993-11-30

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

F02D 4114

Patent

active

052655814

ABSTRACT:
An air-fuel controller for a water-cooled engine provided with a mechanism for detecting a mixing ratio error which is a difference between a target mixing ratio and a real mixing ratio of fuel and air provided for the engine, a mechanism for performing learning related to a fuel injection amount based on the detected mixing ratio error, a memory for storing this learned value, a mechanism for computing a fuel injection correction amount based on this learned value, and a mechanism for outputting a fuel injection amount corrected by this correction amount to the fuel injector. This engine may be provided for example with a mechanism to set the difference between the mixing ratio error in the transient state and after the transient state has terminated as a transient mixing ratio error, and a mechanism to update the learned value stored in the memory such that the transient mixing ratio error is minimized. In this manner, learning precision in air-fuel ratio control is improved.

REFERENCES:
patent: 4667640 (1987-05-01), Sekozawa et al.
patent: 4905653 (1990-03-01), Manaka et al.
patent: 4919094 (1990-04-01), Manaka et al.

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