Engine control apparatus

Details Engine control apparatus Engine control apparatus

1992-03-06

1993-02-09

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Idle speed control

F02M 300

Patent

active

051845881

ABSTRACT:
An engine control apparatus comprises: an actual control condition detector for detecting an actual control condition of an engine; an adjusting device for adjusting the actual control condition of the engine; and a controller for controlling the adjusting device such that the actual control condition of the engine is controlled to a target control condition using a state variable amount and a feedback constant determined on the basis of a dynamic model of the engine, wherein the controller has: a predicated control condition operation circuit for operating a predicted control condition on the basis of the dynamic model of the engine; a deviation operation circuit for operating a deviation of the predicated control condition from the target control condition; a changing circuit for changing control of the controller such that fluctuations of the control condition become small in accordance with a judgement made such that an error of the dynamic model exceeds a tolerance when the deviation exceeds a predetermined value. According to this invention, there is an advantage effect that fluctuation of the engine speed is suppressed because of prevention of hunting due to reduction of variation in the control amount.

REFERENCES:
patent: 4785780 (1988-11-01), Kawai
patent: 5076230 (1991-12-01), Ohkuono
patent: 5081973 (1992-01-01), Minamitani

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