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:
Aug. 05, 2003
Filed:
Dec. 03, 2002
Takeshi Kawakami, Hyogo, JP;
Norio Matsumoto, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An electronic control apparatus for a vehicle performs a rewrite execution permission/refusal determination while preventing leakage of a keyword or passcode without the need of grasping the keyword or passcode on the part of external equipment that requests rewriting the contents of the electronic control apparatus. Control programs and control data for controlling the vehicle are stored in a nonvolatile memory. The contents of the memory are rewritten by a rewriting part according to a request from the outside. A rewrite execution permission/refusal determination part creates a passcode which is uniquely defined in accordance with a prescribed rule from identification data which is decided upon receipt of a rewrite request, and makes a rewrite execution permission/refusal determination based on the result of collation between a passcode which has been created similarly by an external device from the identification data which has been sent to the external device and returned therefrom.