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. 12, 2008
Filed:
Dec. 09, 2003
Kazunori Nozawa, Chiyoda-ku, JP;
Itaru Tanabe, Chiyoda-ku, JP;
Kazunori Nozawa, Chiyoda-ku, JP;
Itaru Tanabe, Chiyoda-ku, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A control unit stops the supply of constant voltage into a vehicle electronic control unit in an abnormal state even though the ignition is off. A delay circuit for delaying an ignition OFF signal is installed outside the central processing unit. By controlling the power source to OFF by an output signal of the delay circuit or by the delay circuit for delaying by a longer time than that of a shut-off signal from the CPU due to the ignition OFF signal, and by the AND circuit of the output signal of the delay circuit and the shut-off signal from the CPU, and by an output signal of the AND circuit which is changed from high to low, the power supply from the power source IC is stopped.