摘要:
A tire pressure monitoring system (12) for a vehicle (10) has a pressure sensor circuit (16A) that includes an ECU (95), a transmitter/receiver (90), and pressure sensor (94). A method of operating a tire pressure monitoring system includes calibrating a tire pressure sensor circuit in a first range and a second range and generating a first calibration data for the first range and second calibration data for the second range. The first calibration data and the second calibration data are stored in a memory of the tire pressure sensing circuit (16A). A data signal corresponding to the pressure is generated. The first or second calibration data is generated in response to the range of the data signal to form a selected calibration. The data signal is calibrated with the selected calibration to form a pressure indicative signal. The pressure indicative signal is transmitted to a receiver (28) within the vehicle (10) with a range status corresponding to the selected calibration. A pressure signal is formed in response to the pressure indicative signal and the range status and the tire pressure monitoring system is operated with the pressure signal.
摘要:
A tire pressure monitoring system (12) for a vehicle (10) has a pressure sensor circuit (16A) that includes an ECU (95), a transmitter/receiver (90), and pressure sensor (94). A method of operating a tire pressure monitoring system includes calibrating a tire pressure sensor circuit in a first range and a second range and generating a first calibration data for the first range and second calibration data for the second range. The first calibration data and the second calibration data are stored in a memory of the tire pressure sensing circuit (16A). A data signal corresponding to the pressure is generated. The first or second calibration data is generated in response to the range of the data signal to form a selected calibration. The data signal is calibrated with the selected calibration to form a pressure indicative signal. The pressure indicative signal is transmitted to a receiver (28) within the vehicle (10) with a range status corresponding to the selected calibration. A pressure signal is formed in response to the pressure indicative signal and the range status and the tire pressure monitoring system is operated with the pressure signal.
摘要:
A tire pressure monitoring system for detachment detection of a tire pressure sensor is provided. The system includes a tire pressure sensor, a receiver and a controller. The tire pressure sensor includes a transmitter for transmitting a word having a detachment state. The receiver is for receiving the word and is coupled to the controller. The controller decodes the word and determines the detachment state of the tire pressure sensor. A robust method for the automatic detection of a detached tire pressure sensor of a tire pressure monitoring system is also provided.
摘要:
A tire pressure monitoring system for detachment detection of a tire pressure sensor is provided. The system includes a tire pressure sensor, a receiver and a controller. The tire pressure sensor includes a transmitter for transmitting a word having a detachment state. The receiver is for receiving the word and is coupled to the controller. The controller decodes the word and determines the detachment state of the tire pressure sensor. A robust method for the automatic detection of a detached tire pressure sensor of a tire pressure monitoring system is also provided.
摘要:
A tire pressure monitoring system (12) for a vehicle (10) includes a vehicle speed sensor (38, 98) that is used to generate a vehicle speed signal. A receiver (28) operates using a first protocol when the vehicle speed signal is below a first speed threshold and operates using a second protocol when the vehicle speed is above the speed threshold. A remote keyless entry system (23) is coupled to the receiver and operates when the vehicle speed is below a speed threshold. The remote keyless entry system (23) receives signals from a keyless entry transmitter (60) using the first protocol. A tire pressure monitoring system (12) has a pressure transmitter (16A-16E) that generates a signal using a first protocol and a second protocol when the speed signal is below the speed threshold and generating the signal using only the second protocol when the speed signal is above the speed threshold.
摘要:
A tire pressure monitoring system (12) for a vehicle (10) includes a vehicle speed sensor (38, 98) that is used to generate a vehicle speed signal. A receiver (28) operates using a first protocol when the vehicle speed signal is below a first speed threshold and operates using a second protocol when the vehicle speed is above the speed threshold. A remote keyless entry system (23) is coupled to the receiver and operates when the vehicle speed is below a speed threshold. The remote keyless entry system (23) receives signals from a keyless entry transmitter (60) using the first protocol. A tire pressure monitoring system (12) has a pressure transmitter (16A-16E) that generates a signal using a first protocol and a second protocol when the speed signal is below the speed threshold and generating the signal using only the second protocol when the speed signal is above the speed threshold.
摘要:
A tire pressure monitoring system (12) for a vehicle (10) has a plurality of tires (14a-d) in respective rolling locations having a respective plurality of tire transmitters (16a-d) that generate a respective plurality of transmitter identification signals. A controller (22) is coupled to a counter that counts ignition cycle transitions. The controller enters a learn mode in response to the count and the brake condition signal. The system may also include a display for signaling the vehicle operator to perform a desired action. The controller generates a plurality of display signals on the display indicative of the respective plurality of tire locations and activates a timer when the plurality of transmitter identification signals are received before a predetermined time is counted by the timer.
摘要:
A tire pressure monitoring system (12) for an automotive vehicle (10) has a receiver circuit (28). The vehicle (12) has a plurality of wheels (14A-14D). A plurality of antennas (31A-31D) are adjacent to one of the wheels (14A-14D). The plurality of antennas receive RF signals from a pressure sensor (16A). An adder circuit (30) is coupled to the receiver circuit and the plurality of antennas. The adder circuit receives the RF signals and adds them together to form a sum signal. The sum signal is coupled to the receiver circuit.
摘要:
A tire pressure monitoring system (12) for an automotive vehicle (10) has a receiver circuit (28). The vehicle (12) has a plurality of wheels (14A-14D). A plurality of antennas (31A-31D) are adjacent to one of the wheels (14A-14D). The plurality of antennas receive RF signals from a pressure sensor (16A). An adder circuit (30) is coupled to the receiver circuit and the plurality of antennas. The adder circuit receives the RF signals and adds them together to form a sum signal. The sum signal is coupled to the receiver circuit.
摘要:
A tire pressure monitoring system for a vehicle has been disclosed that can detect an excessive leakage rate of a tire. The system utilizes the starting pressure and starting temperature of a tire and the current pressure and current temperature of that tire with the time lapsed to determine the leakage rate of the tire. This leakage rate is compared to a leakage rate threshold. If the leakage rate is greater than the leakage rate threshold, an excessive leakage rate alert is generated.