Disclosed is an access device of a vehicle having an on-vehicle control device configured to transmit enquiry signals to a mobile identification transmitter to determine the state of motion thereof, and adapt the transmission of the enquiry signals for a response signal received from the mobile identification transmitter containing the state of motion of the mobile identification transmitter, or on the basis of the absence of the response signal. Energy is saved in the event of a response signal containing a communicated stationary state of the mobile identification transmitter or in the absence of a response signal by reducing the frequency of the transmission of the enquiry signals.

A control device connected to a non-contact charging device for non-contact charging a portable device and a wireless communication device for communicating with an electronic key to operate an electrical component mounted in a vehicle, includes a memory that stores a wireless communication cycle for communication between the electronic key and the wireless communication device, a wireless communication control signal output part that outputs a wireless communication control signal for controlling operation of the wireless communication device, a non-contact charge control signal output part that outputs a non-contact charge control signal for controlling operation of the non-contact charging device, and a synchronizer that synchronizes the wireless communication control signal and the non-contact charge control signal with each other.

An access arrangement for a vehicle includes a vehicle-side transceiver for transmitting query signals in a chronologically successive manner in first specified time intervals. The access arrangement also includes at least one mobile identification transmitter including an identification transmitter-side transceiver with an adjustable reception sensitivity for receiving the query signals of the vehicle-side transceiver. Furthermore, the access arrangement includes a monitoring device for outputting a control command in order to reduce the sensitivity of the identification transmitter-side transceiver by a first specified amount if the identification transmitter-side transceiver has received a specified number of query signals transmitted by the vehicle-side transceiver. By reducing the reception sensitivity, a stationary identification transmitter in the vicinity of the vehicle for example remains operational but no longer reacts to query signals of the vehicle-side transceiver, whereby power can be saved.

An electronic circuit includes a regulator circuit including at least one regulator configured to supply a predetermined voltage by receiving a power supply from a main power source circuit, a functional circuit configured to operate on the voltage supplied from the regulator and perform a predetermined function, and a monitor circuit connected to at least one of the regulators and configured to monitor operation mode information inputted to the regulator. When detecting that the operation mode information contains sleep transition information to make a transition from a normal mode as a normal operation state to a sleep mode as an operation state where power consumption is smaller than that in the normal mode, the monitor circuit outputs a voltage output maintaining signal to the regulator connected to the monitor circuit to supply the voltage capable of causing the functional circuit to operate in the normal mode.

An electronic circuit includes a regulator circuit including at least one regulator configured to supply a predetermined voltage by receiving a power supply from a main power source circuit, a functional circuit configured to operate on the voltage supplied from the regulator and perform a predetermined function, and a monitor circuit connected to at least one of the regulators and configured to monitor operation mode information inputted to the regulator. When detecting that the operation mode information contains sleep transition information to make a transition from a normal mode as a normal operation state to a sleep mode as an operation state where power consumption is smaller than that in the normal mode, the monitor circuit outputs a voltage output maintaining signal to the regulator connected to the monitor circuit to supply the voltage capable of causing the functional circuit to operate in the normal mode.

The present application generally relates to battery powered door unlock mechanisms. More specifically, the application teaches an unlock system including a door unlock mechanism, a capacitive circuit having a first time response, a resistive-capacitive circuit having a second time response wherein the second time response is longer than the first time response, a battery for coupling a battery charge to the capacitive circuit and the resistive capacitive circuit in response to a door unlock authentication signal, and a relay for coupling a first charge from the capacitive circuit to the door unlock mechanism in response to the relay being activated by a second charge from the resistive-capacitive circuit after the second time response.

The present application generally relates to battery powered door unlock mechanisms. More specifically, the application teaches an unlock system including a door unlock mechanism, a capacitive circuit having a first time response, a resistive-capacitive circuit having a second time response wherein the second time response is longer than the first time response, a battery for coupling a battery charge to the capacitive circuit and the resistive capacitive circuit in response to a door unlock authentication signal, and a relay for coupling a first charge from the capacitive circuit to the door unlock mechanism in response to the relay being activated by a second charge from the resistive-capacitive circuit after the second time response.

A vehicle-mounted device includes vehicle information detecting unit for detecting an on/off state of vehicle power, relay input/output unit for controlling an external relay configured to make a switch between a starting-disabled state and a starting-enabled state of a vehicle, and vehicle information-associated control unit for controlling the external relay based on a relay control command. The vehicle information-associated control unit controls the external relay based on an elapsed time since a change in the on/off state of vehicle power detected by the vehicle information detecting unit.

The invention relates to an energy supply circuit of electric components, in particular for a motor vehicle, having an accumulator, wherein a discharge monitoring circuit monitors the energy stored in the accumulator. If the energy stored in the accumulator falls below a threshold value, the discharge monitoring circuit switches off the energy supply at least of individual components, in particular of all components.

A reception range varying system includes a vehicle control device and a portable device. The reception range varying system determines whether a position where the portable device exists is within an execution range which enables execution of vehicle control over the portable device, or within a reception range but outside the execution range, and narrows the reception range so that the portable device is positioned outside the reception range while maintaining the reception range at a size equivalent to or larger than the execution range, on the basis that the position where the portable device exists is within the reception range but outside the execution range.