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:
Jul. 21, 1981
Filed:
Oct. 18, 1978
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ; G05B / ;
U.S. Cl.
CPC ...
364734 ; 364431 ; 364724 ;
Abstract
An input signal processor used in the control apparatus for an internal combustion engine of automobiles, the apparatus being equipped with an electronic computer, wherein the ripple components contained in a signal sampled with a constant period, e.g. a signal representing the air flow rate and the rotational speed of the engine, are eliminated through a predetermined arithmetic process by the use of an unprocessed signal x.sub.i at an instant t.sub.i and the signal y.sub.i-1 already processed at the instant t.sub.i-1 so that an optimal control of the internal combustion engine matched to all driving conditions of the automobile can be performed by using the processed signal without any ripple component.