Apparatus for controlling speed of internal combustion engine

Details Apparatus for controlling speed of internal combustion engine Apparatus for controlling speed of internal combustion engine

1992-06-10

1993-12-14

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Idle speed control

123418, F02D 4116

Patent

active

052692710

ABSTRACT:
A speed control apparatus for an engine which is equipped with an air quantity control device for controlling an intake air quantity to the engine when being in an idling state and a speed control device for determining a control amount of the air quantity control device on the basis of the actual engine idle speed. For controlling the engine idle speed, the apparatus comprises a state variable outputting section for outputting the actual engine idle speed, the control amount of the air quantity control device and an ignition timing control amount of an igniter of the engine as state variables representing an internal state of a dynamic model of the engine, a speed deviation accumulating section for accumulating a deviation between the target speed and the actual engine idle speed, and an ignition timing deviation accumulating section for accumulating a deviation between a target ignition timing and the actual ignition timing. The control amount of the air quantity control device and the ignition timing control amount are calculated on the basis of optimal feedback gains of an air system and an ignition system predetermined on the basis of the dynamic model, the state variables, the speed deviation accumulated value and the ignition timing deviation accumulated value. This arrangement can simultaneously control the air quantity and the ignition timing without using an observer to easily control the engine idle speed to the target speed.

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patent: 5121726 (1992-06-01), Di Nunzio et al.
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