Idle speed control system for an engine

Details Idle speed control system for an engine Idle speed control system for an engine

1990-09-07

1991-12-31

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Idle speed control

F02M 300

Patent

active

050762303

ABSTRACT:
A feedback control system has a comparing section to compare idling engine speed with a wide dead zone and a narrow dead zone. The wide dead zone has a predetermined width with respect to a desired idle speed. The narrow dead zone width is narrower than the wide dead zone width. When the idling speed is out of the wide dead zone, the system selects the narrow dead zone for rapid convergence of the idling speed. When the idling speed is within the narrow dead zone, the system selects the wide dead zone to prevent hunting.

REFERENCES:
patent: 4474151 (1984-10-01), Atago et al.
patent: 4526144 (1985-07-01), Hasegawa et al.
patent: 4651694 (1987-03-01), Kataoka
patent: 4825829 (1989-05-01), Abe
patent: 4903658 (1990-02-01), Miyama et al.
patent: 4969435 (1990-11-01), Morikawa et al.
patent: 4989565 (1991-02-01), Shimomura et al.

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