Indirect tire pressure monitoring systems and methods
First Claim
1. An indirect tire pressure monitoring system (TPMS) comprising:
- an antilock braking system comprising an analog circuitry portion and a digital circuitry portion; and
indirect TPMS circuitry coupled to the antilock braking system between the analog circuitry portion and the digital circuitry portion to receive data from the antilock braking system before digital processing of the data by the digital circuitry portion.
1 Assignment
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Accused Products
Abstract
Embodiments relate to indirect tire pressure monitoring systems (TPMSs) and methods that utilize anti-lock braking system (ABS) signals. In embodiments, information from the ABS Hall signal is obtained before pulse forming. The information can be analyzed for resonance within the ABS sensor. In some embodiments, the digitized information can be modulated onto the conventional ABS wheel speed clock signal for transmission to and analysis by the indirect TPMS electronic control unit (ECU). According to embodiments, additional information about higher-order harmonics of the wheel rotation can be provided to the TPMS ECU, which can then calculate a more accurate estimation of tire pressure while reducing warning latency.
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Citations
20 Claims
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1. An indirect tire pressure monitoring system (TPMS) comprising:
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an antilock braking system comprising an analog circuitry portion and a digital circuitry portion; and indirect TPMS circuitry coupled to the antilock braking system between the analog circuitry portion and the digital circuitry portion to receive data from the antilock braking system before digital processing of the data by the digital circuitry portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method comprising:
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extracting data from an antilock braking system before digital processing of the data by the antilock braking system; analyzing the data to determine a resonance frequency associated with the data by an indirect tire pressure monitoring system (TPMS) coupled to the antilock braking system; and communicating the data after digital processing of the data by the antilock braking system and the resonance frequency associated with the data to an engine control unit. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification