The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 09, 1993
Filed:
Mar. 06, 1992
Nippondenso Co., Ltd., Kariya, JP;
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.