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:
Nov. 20, 1990
Filed:
Jul. 02, 1986
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; F02D / ;
U.S. Cl.
CPC ...
36443112 ; 36443104 ; 123480 ; 123417 ;
Abstract
An engine control system has a CPU (central processing unit), a ROM (read-only memory) and a RAM (random-access memory) backed up by a power supply. Only in the case where the difference between the data in the RAM and that in the ROM is within a predetermined range will the engine control inputs be regulated by use of the data in the RAM.