Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1989-09-05
1991-07-23
Argenbright, Tony M.
Internal-combustion engines
Charge forming device
Fuel injection system
F02D 4114
Patent
active
050334379
ABSTRACT:
A basic fuel injection pulse width value indicating an individual performance of an injector and an intake air flow amount value indicating an individual performance of an air flow sensor are prepared so as to memorize in plural memory areas in a store table, respectively. Deviations due to the basic fuel injection pulse width and deviations due to the intake air flow amount are memorized in the memory areas as learning values for controlling an air-fuel ratio, respectively. A corrected fuel injection pulse width is requested under the memorized learning values. An estimation learning is carried out at a first time learning. A first time learning value of the basic fuel injection pulse width is memorized in a whole area of the store table, and a first time learning value of the intake air flow amount is memorized in a corresponding area of the store table. By carrying out the learning on the air-fuel ratio control in accordance the estimation learning, the learning value absorbs the individual performance dispersion of the injector and the air flow sensor.
REFERENCES:
patent: 4561400 (1985-12-01), Hattori
patent: 4726344 (1988-02-01), Ando et al.
Atago Takeshi
Hori Toshio
Nagano Masami
Argenbright Tony M.
Hitachi , Ltd.
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