System and method for controlling air/fuel mixture ratio for int

Details System and method for controlling air/fuel mixture ratio for int System and method for controlling air/fuel mixture ratio for int

1989-09-29

1991-09-17

Lall, Parshotam S.

Boots, shoes, and leggings

36443101, 123440, 123443, 123489, G06F 1548, F02M 5100, F02M 4100, G06G 770

Patent

active

050500830

ABSTRACT:
A system and method for controlling an air/fuel mixture for an internal combustion engine are disclosed in which an integration constant used for a calculation of an integration portion included in a feedback correction coefficient (.alpha.) of the air/fuel mixture ratio after a relationship between an actual air/fuel mixture raito and target (stoichiometric) air/fuel mixture ratio has been inverted is set and varied according to an engine driving condition, so that the integration constant meets requirements of a stability during an engine steady driving condition and a favorable responsive characteristic during an engine transient condition. In a preferred embodiement, a fuzzy control is applicable to the calculation of the integration constant.

REFERENCES:
patent: 4535736 (1985-08-01), Taura et al.
patent: 4763627 (1988-08-01), Tomisawa
patent: 4878472 (1989-11-01), Hibino
patent: 4881505 (1989-11-01), Tomisawa
patent: 4884547 (1989-12-01), Tamura
patent: 4926826 (1990-05-01), Nakaniwa et al.

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