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:
Jan. 27, 2004
Filed:
Sep. 27, 2001
Katsuyuki Sumimoto, Tokyo, JP;
Keiichi Komurasaki, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A starter protective device is provided which is capable of accurately determining the commencement of overrunning (i.e., timing of the commencement of starting of an engine) even in the presence of variations in the cycle of fluctuations in a battery voltage, noise and so on, thereby to prevent a starter from being overrun after starting of an engine in a reliable manner. The starter protective device includes an overrunning determination section for determining when the starter motor commences overrunning; and a starter motor cut-off section for interrupting the main contactor when it is determined that the starter motor commences overrunning. The overrunning determination section detects a change over time of the battery voltage BV after the starter switch has been turned on, and determines that the starter motor commences overrunning when the battery voltage VB remains unchanged without any increase or decrease over a predetermined time T.