Engine idle speed control apparatus

Details Engine idle speed control apparatus Engine idle speed control apparatus

1990-05-17

1991-03-26

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Idle speed control

123585, R02M 308

Patent

active

050020269

ABSTRACT:
An idle speed control apparatus of an engine, having a valve for changing an intake air quality to the engine, a device for measuring an engine coolant temperature, a circuit for detecting an engine speed, and a device responsive to said engine speed for controlling an opening degree of said valve to maintain said engine speed to a predetermined speed under idling state, comprising: a device for producing a signal when said engine coolant temperature exceeds a predetermined temperature; a device responsive to said signal for starting to count a cumulative time period; a device responsive to said cumulative time period for setting a correction opening degree; and a device responsive to said correction opening degree and a current opening degree of said valve means for calculating a learnt opening degree.

REFERENCES:
patent: 4825829 (1989-05-01), Abe
patent: 4827885 (1989-05-01), Nishikawa et al.
patent: 4879982 (1989-11-01), Itakura et al.

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