Internal-combustion engines – Engine speed regulator – Idle speed control
Patent
1990-09-06
1991-10-01
Nelli, Raymond A.
Internal-combustion engines
Engine speed regulator
Idle speed control
F02M 300
Patent
active
050523570
ABSTRACT:
An intake air amount control system for an internal combustion engine includes a control valve for regulating the amount of intake air supplied through the intake pipe to the engine. An ECU determines the difference between a desired idling rotational speed of the engine and an actual rotational speed of same and feedback-controls the control valve by means of a control amount responsive to the determined difference such that the actual rotational speed becomes equal to the desired idling rotational speed. The ECU learns a reference value of the control amount by calculating an average value of values of the control amount applied during the feedback control. The ECU inhibits the learning of the reference value of the control amount when the difference between atmospheric pressure and absolute pressure within the intake pipe is smaller than a predetermined value.
REFERENCES:
patent: 4856475 (1989-08-01), Shimpmura et al.
patent: 4862851 (1989-09-01), Washino et al.
patent: 4864997 (1989-09-01), Miyachi
patent: 4877002 (1989-10-01), Shimomura et al.
patent: 4884540 (1989-12-01), Kishimoto et al.
patent: 4976238 (1990-12-01), Toyoda
patent: 4986236 (1991-01-01), Kobayashi
Fujimoto Sachito
Kitamoto Masakazu
Honda Giken Kogyo Kabushiki Kaisha
Nelli Raymond A.
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