On-vehicle emergency call system
First Claim
1. An on-vehicle emergency call system powered by a main battery comprising a communication unit that communicates with a service center, a control unit that drives the communication unit with electric power supplied from the main battery to connect a communication line with the service center when an emergency call triggering signal is given thereto, wherein the control unit makes the communication unit send a battery-low-voltage signal if terminal voltage of the main battery becomes lower than a first threshold voltage while the communication line is connected with the service center.
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Accused Products
Abstract
An on-vehicle emergency call system is powered by a main battery. The emergency call system includes a communication unit that communicates with a service center, a control unit that drives the communication unit with electric power supplied from the main battery to connect a communication line with the service center when an emergency call triggering signal is given thereto. The control unit makes the communication unit send a battery-low-voltage signal if terminal voltage of the main battery becomes lower than a threshold voltage while the communication line is connected with the service center.
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Citations
8 Claims
- 1. An on-vehicle emergency call system powered by a main battery comprising a communication unit that communicates with a service center, a control unit that drives the communication unit with electric power supplied from the main battery to connect a communication line with the service center when an emergency call triggering signal is given thereto, wherein the control unit makes the communication unit send a battery-low-voltage signal if terminal voltage of the main battery becomes lower than a first threshold voltage while the communication line is connected with the service center.
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8. An on-vehicle emergency call system comprising:
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a main battery; an auxiliary battery; a communication unit for communicating with a service center; a power source control means for examining the terminal voltage of the main battery; and a control unit for driving the communication unit to connect a communication line with the service center when an emergency call triggering signal is given thereto, wherein the control unit makes the communication unit send a battery-low-voltage signal and replace the main battery with the auxiliary battery if the power source control means judges that the terminal voltage of the main battery becomes lower than a threshold voltage while the communication line is connected with the service center.
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Specification