Idling speed control system of internal combustion engine

Details Idling speed control system of internal combustion engine Idling speed control system of internal combustion engine

1998-07-29

1999-11-02

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Idle speed control

12333916, 12333917, 12333918, F02D 4116, F02D 4108

Patent

active

059750499

ABSTRACT:
An internal combustion engine has an auxiliary device incorporated therewith. An idling speed control device of the engine includes a first air amount control device which controls the amount of air fed to the engine in accordance with an operation condition of the engine, a second air amount control device which controls the amount of air fed to the engine when a load of the auxiliary device is being applied to the engine; and an air/fuel varying device which varies an air/fuel ratio of a mixture fed to the engine. A control unit for the idling speed control device includes a judging unit which judges whether the load of the auxiliary device is actually applied to the engine or not; a first deriving unit which derives a corrected air amount which corresponds to a load of the auxiliary device under idling operation of the engine at a stoichiometric air/fuel ration; a second deriving unit which derives a needed air amount needed by the engine when the engine is idling at a target air/fuel ratio; a calculating unit which calculates a difference between the corrected air amount and the needed air amount when the judging unit judges the application of the load of the auxiliary device to the engine; and an air amount control unit which controls the first air amount control device to correct the air amount fed to the engine in accordance with the difference calculated by the calculating unit.

REFERENCES:
patent: 4611560 (1986-09-01), Miyazaki et al.
patent: 4883034 (1989-11-01), Yashiki et al.
patent: 5253624 (1993-10-01), Anzai et al.

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