摘要:
A method is provided for inductively charging a rechargeable battery of a portable device in a vehicle via a primary circuit that includes a primary inductive coil, a secondary circuit that includes a secondary inductive coil, and a rectifying circuit electrically coupled to the rechargeable battery. A primary coil is energized with a supply voltage. A frequency of the supply voltage is varied. A peak voltage of the primary circuit is detected. The frequency of the supply voltage is adjusted to a respective frequency associated with the peak voltage.
摘要:
An antenna coupler for a wireless communication system in a vehicle couples a transmit signal source to a plurality of antennas arranged within the vehicle. A first saturable reactor has a first load winding and a first control winding wound on a first saturable core, the first load winding coupling the signal source to a first antenna. A first current source is coupled to the first control winding for providing a selected current to the first control winding. A second saturable reactor has a second load winding and a second control winding wound on a second saturable core, the second load winding coupling the signal source to a second antenna. A second current source is coupled to the second control winding for providing a selected current to the second control winding. A controller is coupled to the first and second current sources for commanding the first and second selected currents to selectably attenuate or non-attenuate a transmit signal from the transmit signal source to each respective antenna.
摘要:
A secret key is programmed into a key transponder from a base station wherein the key transponder stores a fixed ID, a first default key segment stored in a first memory page, and a second default key segment stored in a second memory page. The secret key comprises a first new secret key segment to be stored in the first memory page of the key transponder and a second new secret key segment to be stored in the second memory page of the key transponder. A mutual authentication process is initially conducted using the default key. Write commands are sent to the key transponder in transferring each key segment. Write acknowledgement signals and confirmatory reading back of the data are employed for ensuring proper storage of the secret key. Recovery from the most probable types of errors enables successful programming of key transponders in an efficient manner with a low loss rate.
摘要:
Vehicle information (e.g., status information, calibratable parameters, or diagnostic data) is transmitted from a base station mounted in a vehicle to a portable RKE fob via a radio-frequency signal within a specified average field strength limit. A multi-byte vehicle message is formed and then coded into a multi-bit coded message. The multi-bit coded message is framed into a plurality of packets. The radio-frequency signal is wirelessly transmitted from the base station with a plurality of spaced packet windows having a predetermined duty cycle, each packet window including a respective one of the plurality of packets. The radio-frequency signal within each of the packet windows has a predetermined field strength greater than the average field strength limit and a substantially zero field strength between the packet windows. The predetermined duty cycle results in an actual average field strength for transmitting all of the packets not exceeding the average field strength limit.
摘要:
A method is provided for inductively charging a rechargeable battery of a portable device in a vehicle via a primary circuit that includes a primary inductive coil, a secondary circuit that includes a secondary inductive coil, and a rectifying circuit electrically coupled to the rechargeable battery. A primary coil is energized with a supply voltage. A frequency of the supply voltage is varied. A peak voltage of the primary circuit is detected. The frequency of the supply voltage is adjusted to a respective frequency associated with the peak voltage.
摘要:
A circuit board assembly for use in a vehicle immobilizer system in accordance with the present invention includes a printed circuit board for mounting in an interior portion of the vehicle and having an aperture formed therethrough. The aperture is defined by an interior wall of the printed circuit board. An antenna trace is printed on the circuit board proximate to the interior wall defining the aperture. An ignition switch assembly extends through the aperture of the circuit board. The ignition switch is operable to receive a key having a transponder disposed thereon, and the antenna trace is operable to alternately transmit a signal to and receive a signal from the transponder when the key is positioned in the ignition switch.
摘要:
A cellular telephone communication apparatus rechargeable by an exterior power source comprises a housing that includes a rechargeable battery. A secondary inductive coil disposed in the housing is excited by the exterior power source. A control circuit disposed in the housing is electrically connected between the secondary inductive coil and the rechargeable battery for controlling energy flow to the rechargeable battery. A transmitter disposed in the housing is activated for transmitting an identification signal. The identification signal identifies a particular rechargeable battery for recharging.
摘要:
A trailer tire monitoring system and method is employed with a trailer having tires and being towed by a vehicle. The trailer tire monitoring system has tire sensor assemblies, each mounted in a respective one of the trailer tires, with each tire sensor assembly including a sensor apparatus that monitors at least one tire operating parameter and a wireless transmitter apparatus capable of wirelessly transmitting data relating to the at least one tire operating parameter. The monitoring system also has a relay unit preferably mounted on the trailer and including a relay receiver adapted for receiving the wirelessly transmitted data from the wireless transmitters of the tire sensor assemblies, and a wireless relay transmitter that wirelessly transmits the data. An in-vehicle receiver receives the wirelessly transmitted data from the wireless relay transmitter, and an in-vehicle indicator is in communication with the in-vehicle receiver and available to the vehicle operator.
摘要:
In a vehicle passive entry system including a remote transceiver, a system and method for detecting the location of the remote transceiver relative to the vehicle. An exterior vehicle antenna is provided for use in transmitting a first signal for receipt by the remote transceiver, and an interior vehicle antenna is provided for use in transmitting a second signal for receipt by the remote transceiver. A controller is provided on board the remote transceiver for determining a signal strength of the first signal, determining a signal strength of the second signal, and determining whether the remote transceiver is located inside or outside the vehicle based on the signal strengths of the first and second signals.
摘要:
A system for providing vehicle location information or confirmation of remote entry system operation to a user. In one embodiment, a vehicle transceiver receives a wireless vehicle device function signal, and a vehicle controller generates a vehicle device control signal for use in operating a vehicle device in response. The vehicle controller also confirms operation of the vehicle device, and the vehicle transceiver transmits a wireless vehicle device function confirmation signal. A remote unit includes a transceiver for operation by the user for transmitting the vehicle device function signal and for receiving the vehicle device function confirmation signal. The remote unit also includes an indicator for providing an indication to the user confirming operation of the vehicle device, and a storage device for storing retrievable data representing the indication confirming operation of the vehicle device.