Method and apparatus for adjusting the intake air flow rate of a

Details Method and apparatus for adjusting the intake air flow rate of a Method and apparatus for adjusting the intake air flow rate of a

1997-03-20

1998-03-03

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Idle speed control

F02M 300

Patent

active

057223688

ABSTRACT:
With an internal combustion engine wherein a throttle valve is disposed in an intake system, idle operation is carried out immediately after engine manufacture, and intake air flow rate is feedback controlled so that engine rotation speed approaches a target rotation speed. The control value when the target rotation speed is obtained is learned, and the learned result for the obtained control value is stored as an initial idle intake air flow rate adjustment value. As a result, initial fluctuations in idle intake air flow rate due to initial component and engine variations occurring at manufacture can be corrected. Hence, from the start, the idle intake air flow rate can be optimally adjusted so that the idle rotation speed rapidly converges on the target value.

REFERENCES:
patent: 5421302 (1995-06-01), Livshits et al.
patent: 5623903 (1997-04-01), Ueda
patent: 5630394 (1997-05-01), Grizzle et al.
patent: 5642707 (1997-07-01), Cerf et al.

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