Idling speed control systems for internal combustion engines

Details Idling speed control systems for internal combustion engines Idling speed control systems for internal combustion engines

1986-07-07

1987-09-08

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123352, F02D 4116

Patent

active

046916750

ABSTRACT:
An idling speed control system for an internal combustion engine comprises an engine speed sensor, a target idling speed determining unit for setting a target idling speed, an intake air mass flow determining unit for obtaining a difference between an actual idling speed detected by the engine speed sensor and the target idling speed and producing a control signal for determining intake air mass flow supplied to a combustion chamber on the strength of the difference obtained, an intake air mass flow adjusting unit for adjusting intake air mass flow supplied actually to the combustion chamber in response to the control signal, and an extra intake air supplying unit operative to cause the intake air mass flow adjusting unit to start supplying the combustion chamber with extra intake air mass flow when the actual idling speed has gone down to be lower than a first predetermined speed and then to cause the intake air mass flow adjusting unit to cease supplying with the extra intake air mass flow when the actual idling speed has risen to attain a second predetermined speed higher than the first predetermined speed.

REFERENCES:
patent: 4237838 (1980-12-01), Kinugawa et al.
patent: 4611560 (1986-09-01), Miyazaki et al.

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