Patent ID: 7356358
Filing Date: 2008-04-08
Classification: B60R

Abstract:
1. An onboard wireless communication system comprising: wireless communication means that transmits a signal to an outside; power supply means that supplies power from a battery to the wireless communication means; control means that controls the power supply from the battery to the wireless communication means and transmission of an emergency report signal from the wireless communication means to the outside; and current integration means that calculates an integration value of current fed from the battery after battery starts discharging, wherein the control means includes signal transmission instructing means that issues an instruction to the wireless communication means for transmitting the emergency report signal to the outside on a condition that the emergency signal is detected while the power is supplied from the power supply means to the wireless communication means, the current integration means includes power supply determining means, emergency signal detecting means, integration value comparing means, calculation halting means, and power supply halting means the power supply determining means determines whether power is supplied from the power supply means to the wireless communication means, the emergency signal detecting means detects an emergency signal outputted from an onboard electronic control unit, the current integration means includes, the integration value comparing means compares the integration value with a reference value and determines whether the integration value is equal to or larger than the reference value, the calculation halting means temporarily stops the calculation of the integration value at least until the control means completes the transmission of the emergency report signal from the wireless communication means to the outside on the condition that the emergency signal is detected by the emergency signal detecting means while the integration value is still smaller than the reference value, and the power supply halting means stops the power supply from the power supply means to the wireless communication means based on an instruction from the control means on a condition that the integration value is equal to or larger than the reference value while the emergency signal is still not detected by the emergency signal detecting means.