Title:
車載無線通信装置
Document Type and Number:
Japanese Patent JP4735728
Kind Code:
B2
Abstract:
A vehicle communication apparatus has a main battery, and the main battery is switched to a supplemental battery when voltage of the main battery falls to a second threshold. Further, prior to voltage fall of the main battery to the second threshold, vehicle information at least including position of a vehicle is prepared for transmission from a report unit. By adapting the above voltage monitoring scheme, the removal of the main battery is appropriately detected, and the position information of the vehicle is appropriately reported wirelessly to an information center by the report unit, and working time of the report unit that is operated by the supplemental battery is extended without increasing the capacity of the supplemental battery.
Inventors:
Yukomi Tanaka
Application Number:
JP2009052455A
Publication Date:
July 27, 2011
Filing Date:
March 05, 2009
Export Citation:
Assignee:
株式会社デンソー
International Classes:
B60R25/102; B60R16/033; B60R25/33; B60R25/34
Domestic Patent References:
| JP2003112606A | ||||
| JP200413534A | ||||
| JP9240429A |
Attorney, Agent or Firm:
Kazuyuki Yahagi
Taihei Nonobe
Takanori Kubo
Taihei Nonobe
Takanori Kubo