Door open detection for use with TPMS and smart entry system
First Claim
1. A vehicle system comprising:
- tire sensors mounted in, on or adjacent respective tires of the vehicle, each tire sensor being configured to transmit a signal and to detect an LF field;
low frequency (“
LF”
) antennas including a door-mounted antenna mounted on a door of the vehicle, each LF antenna being configured to transmit an LF tire sensor wake up field to wake up respective tire sensors;
a receiver mounted on the vehicle configured to receive signals transmitted from the tire sensors;
a door switch associated with the door having the door-mounted antenna mounted thereto, the door switch being configured for determining whether the door is open; and
an electronic control unit (“
ECU”
) in communication with the antennas, the receiver and the door switch, wherein the ECU is configured to receive identification signals from the respective tire sensors and to determine locations of the respective tire sensors based on which antenna woke up the tire sensor transmitting the respective identification signal and whether the respective identification signal matches other received identification signals, and wherein the ECU is further configured to;
(1) disregard signals received from the tire sensors woken up by the door-mounted antenna when the door was open, or (2) inhibit the door-mounted LF antenna from transmitting the LF field to wake up the tire sensors when the door is open.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle system that can overcome at least some of the aforementioned shortcomings includes tire sensors mounted in, on or adjacent respective tires of the vehicle, LF antennas including a door-mounted antenna on a door of the vehicle, a receiver mounted on the vehicle, a door switch associated with the door having the door-mounted antenna mounted thereto, and an ECU in communication with the antennas, the receiver and the door switch. Each tire sensor is configured to transmit a signal and to detect an LF field. Each LF antenna is configured to transmit an LF tire sensor wake up field to wake up respective tire sensors. The receiver is configured to receive signals transmitted from the tire sensors. The door switch is configured for determining whether the door is open. The ECU is configured to receive identification signals from the respective tire sensors via the RF receiver. The ECU is further configured to determine locations of the respective tire sensors based on which antenna woke up the tire sensor transmitting the respective identification signal and whether the respective identification signal matches other received identification signals. The ECU is further configured to: (1) disregard signals from the tire sensors woken up by the door-mounted antenna when the door was open or (2) inhibit the door-mounted LF antenna from transmitting the LF field to wake up the tire sensors when the door is open.
54 Citations
22 Claims
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1. A vehicle system comprising:
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tire sensors mounted in, on or adjacent respective tires of the vehicle, each tire sensor being configured to transmit a signal and to detect an LF field; low frequency (“
LF”
) antennas including a door-mounted antenna mounted on a door of the vehicle, each LF antenna being configured to transmit an LF tire sensor wake up field to wake up respective tire sensors;a receiver mounted on the vehicle configured to receive signals transmitted from the tire sensors; a door switch associated with the door having the door-mounted antenna mounted thereto, the door switch being configured for determining whether the door is open; and an electronic control unit (“
ECU”
) in communication with the antennas, the receiver and the door switch, wherein the ECU is configured to receive identification signals from the respective tire sensors and to determine locations of the respective tire sensors based on which antenna woke up the tire sensor transmitting the respective identification signal and whether the respective identification signal matches other received identification signals, and wherein the ECU is further configured to;
(1) disregard signals received from the tire sensors woken up by the door-mounted antenna when the door was open, or (2) inhibit the door-mounted LF antenna from transmitting the LF field to wake up the tire sensors when the door is open. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for operating a vehicle system comprising:
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receiving a signal at an electronic control unit (“
ECU”
) to transmit from a door-mounted LF antenna an LF field to wake up tire sensors disposed within tires mounted on a vehicle;determining whether a door, to which the door-mounted LF antenna is mounted, is open or closed; disregarding the received signal to transmit the LF field from the door-mounted antenna when the door, to which the door-mounted LF antenna is mounted, is determined to be open; and transmitting the LF field from the door-mounted LF antenna when the door, to which the door-mounted LF antenna is mounted, is determined to be closed. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for operating a vehicle system comprising:
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transmitting a low frequency (“
LF”
) tire sensor wake up field from four antennas to wake up tire sensors located in tires on the vehicle, wherein the vehicle includes a plurality of vehicle doors and each antenna is a door-mounted LF antenna mounted on a respective vehicle door of the plurality of vehicle doors, each antenna is configured and positioned on the vehicle with respect to the tire sensors to transmit a respective LF tire sensor wake up field to wake up two tire sensors, wherein two of the antennas are also configured to transmit an LF fob wake up field to wake up a portable transmission/reception unit for keyless entry of the vehicle;determining whether a first vehicle door of the plurality of vehicle doors is open or closed based on a state of a door switch associated with the first vehicle door; transmitting signals including an identification signal from the tire sensors to a receiver on the vehicle in response to detecting the tire sensor wake up fields by respective tire sensors; disregarding the received signal from the respective tire sensors awakened by the door-mounted antenna mounted to the first vehicle door when the first vehicle door is determined to be open; and receiving the respective signal including the respective identification signal from the respective tire sensors awakened by the door mounted-mounted antenna mounted to the first vehicle door when the first vehicle door is determined to be closed. - View Dependent Claims (17, 18, 19, 20)
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21. A vehicle system comprising:
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tire sensors mounted in, on or adjacent respective tires of the vehicle, each tire sensor being configured to transmit a signal and to detect an LF field; low frequency (“
LF”
) antennas including a door-mounted antenna mounted on a door on a first side of the vehicle and a side antenna mounted on a second side of the vehicle opposite the first side, each LF antenna being configured to transmit an LF tire sensor wake up field to wake up respective tire sensors, wherein the door-mounted LF antenna is configured such that when the door is closed the LF tire sensor wake up field from the door-mounted antenna is configured to wake up two tire sensors located in respective tires on the first side of the vehicle;a receiver mounted on the vehicle configured to receive signals transmitted from the tire sensors; a door switch associated with the door having the door-mounted antenna mounted thereto, the door switch being configured for determining whether the door is open; and an electronic control unit (“
ECU”
) in communication with the antennas, the receiver and the door switch, wherein the ECU is configured to receive identification signals from the respective tire sensors and to determine locations of the respective tire sensors based on which antenna woke up the tire sensor transmitting the respective identification signal and whether the respective identification signal matches other received identification signals, and wherein the ECU is further configured to localize a respective tire sensor mounted in a respective tire on the second side of the vehicle based on matching identification signals being transmitted to the receiver from a respective tire sensor in response to the LF tire sensor wake up field from the door-mounted antenna and the side antenna when the ECU has determined that the door having the door-mounted antenna mounted thereto is open based on a state of the door switch.
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22. A method for operating a vehicle system comprising:
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transmitting low frequency (“
LF”
) tire sensor wake up fields to wake up tire sensors located in tires on the vehicle, wherein the LF tire sensor wake up fields include a first LF tire sensor wake up field transmitted from a first door-mounted LF antenna mounted to a first door on a first side of the vehicle and a second LF tire sensor wake up field transmitted from a second antenna mounted to a second door on a second, opposite, side of the vehicle, wherein the first door-mounted LF antenna is configured such that when the first door is closed the first LF tire sensor wake up field is configured to wake up two tire sensors located in respective tires on the first side of the vehicle, wherein the second door-mounted LF antenna is configured such that when the second door is closed the second LF tire sensor wake up field is configured to wake up two tire sensors located in respective tires on the second side of the vehicle;determining at an electronic control unit (“
ECU”
) in communication with the first door-mounted LF antenna and the second door-mounted LF antenna whether the first door is open or closed based on a state of a door switch associated with the first door and in communication with the ECU;transmitting signals including an identification signal from the tire sensors to a receiver on the vehicle in response to detecting the tire sensor wake up fields by respective tire sensors; localizing a respective tire sensor on the second side of the vehicle based on the respective identification signals received by the receiver in response to the first LF tire sensor wake up field and the second tire sensor wake up field when the first door is determined to be open.
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Specification