Internal combustion engine control

Details Internal combustion engine control Internal combustion engine control

1996-12-16

1998-02-24

Moulis, Thomas N.

Internal-combustion engines

Engine speed regulator

Having condition responsive means with engine being part of...

12333915, F02D 4116

Patent

active

057202583

ABSTRACT:
Control of engine speed responsive to a deviation in engine speed away from a target speed is applied selectively under closed-loop airflow control operating conditions, such as idle and coastdown operating conditions in response to analysis of a cause of an engine intake airflow deviation away from a modeled airflow. If airflow deviations are determined to have resulted from variation in internal engine friction away from a nominal friction level, the control is applied. If airflow deviations are determined to have resulted from change in internal engine airflow restriction, such as due to contaminant build-up over a period of engine use, then the control is not applied under closed-loop airflow control operating conditions to avoid overcompensating for such deviations.

REFERENCES:
patent: 5269271 (1993-12-01), Kawai et al.
patent: 5391127 (1995-02-01), Nishimura
patent: 5479897 (1996-01-01), Kawai et al.
patent: 5651341 (1997-07-01), Harada et al.

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