Localization of tire for TPMS and smart entry system
First Claim
1. A vehicle entry/tire pressure monitoring system comprising:
- a left front tire sensor installed in a left front tire of a vehicle;
a left rear tire sensor installed in a left rear tire of the vehicle;
a right front tire sensor installed in a right front tire of the vehicle;
a right rear tire sensor installed in a right rear tire of the vehicle;
a front low frequency (“
LF”
) antenna mounted towards a front of the vehicle, the front antenna being configured to transmit a front LF field to wake up the front tire sensors;
a rear LF antenna mounted towards a rear of the vehicle, the rear antenna being configured to transmit a rear LF field to wake up the rear tire sensors;
a left side LF antenna mounted adjacent, in or on a left door of the vehicle, the left side antenna being configured to transmit a left LF field to wake up the left tire sensors;
a right side LF antenna mounted adjacent, in or on a right door of the vehicle, the right side antenna being configured to transmit a right LF field to wake up the right tire sensors, wherein two of the antennas are also configured to transmit a SMART entry LF search field to wake up a portable transmission/reception unit for keyless entry of the vehicle; and
an ECU in communication with the tire sensors and the LF antennas, 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,wherein each tire sensor and each side antenna are configured such that each tire sensor has at least about an 80% chance of being woken up by the right or the left LF field when the tires are not moving;
wherein each tire sensor, the front antenna, and the rear antenna are configured such that each tire sensor has at least about a 95% chance of being woken up by the right, the left, the front or the rear LF field when the tires are not moving.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle entry/tire pressure management system includes a plurality of tire sensors, a plurality of low frequency (“LF”) antennas and an ECU. Each tire sensor is mounted in a respective tire of the vehicle. Each LF antenna is mounted on the vehicle and is configured to transmit an LF field to wake up two tire sensors. Some antennas can also be configured to transmit a SMART entry LF search field to wake up a portable transmission/reception unit for keyless entry of the vehicle. The ECU is in communication with the tire sensors, via a receiver, and the LF antennas. 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.
65 Citations
20 Claims
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1. A vehicle entry/tire pressure monitoring system comprising:
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a left front tire sensor installed in a left front tire of a vehicle; a left rear tire sensor installed in a left rear tire of the vehicle; a right front tire sensor installed in a right front tire of the vehicle; a right rear tire sensor installed in a right rear tire of the vehicle; a front low frequency (“
LF”
) antenna mounted towards a front of the vehicle, the front antenna being configured to transmit a front LF field to wake up the front tire sensors;a rear LF antenna mounted towards a rear of the vehicle, the rear antenna being configured to transmit a rear LF field to wake up the rear tire sensors; a left side LF antenna mounted adjacent, in or on a left door of the vehicle, the left side antenna being configured to transmit a left LF field to wake up the left tire sensors; a right side LF antenna mounted adjacent, in or on a right door of the vehicle, the right side antenna being configured to transmit a right LF field to wake up the right tire sensors, wherein two of the antennas are also configured to transmit a SMART entry LF search field to wake up a portable transmission/reception unit for keyless entry of the vehicle; and an ECU in communication with the tire sensors and the LF antennas, 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, wherein each tire sensor and each side antenna are configured such that each tire sensor has at least about an 80% chance of being woken up by the right or the left LF field when the tires are not moving; wherein each tire sensor, the front antenna, and the rear antenna are configured such that each tire sensor has at least about a 95% chance of being woken up by the right, the left, the front or the rear LF field when the tires are not moving. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of localizing tire sensors on a vehicle to present data to an operator of the vehicle, the method comprising:
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transmitting a low frequency (“
LF”
) tire sensor wake up signal from four antennas to wake up tire sensors located in tires on the vehicle, wherein each antenna is configured and positioned on the vehicle with respect to the tire sensors to transmit a respective LF tire sensor wake up signal to wake up two tire sensors and two of the antennas are also configured to transmit an LF fob wake up signal to wake up a portable transmission/reception unit for keyless entry of the vehicle, wherein transmitting the LF tire sensor wake up signal occurs in response to receiving a signal from the portable transmission/reception unit for keyless entry;in response to detecting the tire sensor wake up signals by respective tire sensors, transmitting RF signals including an identification signal from tire sensors to an RF receiver on the vehicle; receiving the RF signals including the identification signal via the RF receiver into the ECU; comparing the received identification signals; determining 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 presenting tire data on a display at ignition ON and prior to movement of the tires based on the received RF signals and the determined locations of the respective tire sensors. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A vehicle entry/tire pressure monitoring system comprising:
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a left front tire sensor installed in a left front tire of a vehicle; a left rear tire sensor installed in a left rear tire of the vehicle; a right front tire sensor installed in a right front tire of the vehicle; a right rear tire sensor installed in a right rear tire of the vehicle; a front low frequency (“
LF”
) antenna mounted towards a front of the vehicle, the front antenna being configured to transmit a front LF field to wake up the front tire sensors;a rear LF antenna mounted towards a rear of the vehicle, the rear antenna being configured to transmit a rear LF field to wake up the rear tire sensors; a left side LF antenna mounted to a left door of the vehicle, the left side antenna being configured to transmit a left LF field to wake up the left tire sensors; a right side LF antenna mounted to a right door of the vehicle, the right side antenna being configured to transmit a right LF field to wake up the right tire sensors, wherein two of the antennas are also configured to transmit a SMART entry LF search field to wake up a portable transmission/reception unit for keyless entry of the vehicle; an ECU in communication with the tire sensors and the LF antennas, 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 a door switch mounted adjacent, in or on the left door and the right door of the vehicle, the door switch being configured to detect whether the door of the vehicle associated with the door switch is open and to communicate with the ECU, wherein the ECU is configured to ignore signals from a respective antenna mounted to a door that is open while determining locations of the respective tire sensors. - View Dependent Claims (17, 18, 19, 20)
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Specification