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:
Sep. 04, 2001
Filed:
Apr. 06, 2000
Applicant:
Inventors:
Noboru Takagi, Obu, JP;
Hajime Nomura, Okazaki, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/502 ; B60R 2/510 ;
U.S. Cl.
CPC ...
G06F 1/502 ; B60R 2/510 ;
Abstract
In an engine control apparatus, a control program is stored in a non-volatile rewritable memory such as EEPROM. The control program is rewritten by a rewriting tool. Specifically, a key identification code is retrieved from a vehicle key, and compared with a key reference code stored in the memory. If the compared codes are the same, a program identification code is retrieved from the rewriting tool, and compared with a program reference code stored in the memory. If the compared codes are the same, a new control program is transmitted from the rewriting tool to the memory to rewrite the control program with the new control program.