Tire Pressure Warning Reset Using Temperature Compensation
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Solution Overview
Problem
Current tire pressure monitoring systems face issues with false warnings due to temperature fluctuations, leading to decreased driver acceptance, as they may issue warnings too early or late, and automatic deactivation of warnings without actual tire pressure adjustment, causing confusion and irritation.
Innovation Solution
A method that uses both non-temperature-compensated and temperature-compensated actual tire pressure values to generate and reset tire pressure warnings, where the temperature-compensated value is determined after the warning time, based on a reference temperature measured inside the tire, to ensure accurate assessment of tire pressure changes and prevent false deactivation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature-compensated tire pressure monitoring is used, then warning accuracy is improved, but false warnings occur due to temperature measurement delays and fluctuations
Solution Approach 1:
The system stores the tire pressure value at the moment of warning issuance as a reference value. This preliminary recording allows subsequent comparison with temperature-compensated values to verify whether pressure changes are due to temperature effects or actual pressure loss, thereby reducing false warnings while maintaining accurate detection
Solution Approach 2:
The system continuously monitors tire pressure and temperature, compares actual pressure readings with temperature-compensated pressure values, and uses this feedback loop to distinguish between temperature-induced pressure changes and actual pressure loss. The feedback mechanism prevents false warnings by verifying whether pressure deviations correlate with temperature changes
2Ease of operation
If automatic warning deactivation at reset threshold is implemented, then driver workload is reduced, but driver awareness of actual tire pressure problems is lost
Solution Approach 1:
Before deactivating the warning, the system performs a feedback check by comparing the current tire pressure with the stored reference pressure at warning issuance. If the pressure difference exceeds a predetermined threshold, the warning remains active, ensuring drivers are informed of actual pressure problems. Only when temperature compensation explains the pressure change does the system safely deactivate the warning
Solution Approach 2:
The warning deactivation threshold is made dynamic rather than fixed. The system adjusts the effective reset threshold based on the relationship between current pressure, reference pressure, and temperature compensation. This dynamic approach allows automatic deactivation when appropriate (reducing workload) while maintaining warnings when actual problems exist (preserving information)
3Device complexity
If non-temperature-compensated pressure monitoring is used, then system complexity is reduced, but warnings are issued incorrectly due to temperature-induced pressure changes
Solution Approach 1:
The monitoring function is segmented into two independent parts: basic non-temperature-compensated pressure monitoring (simple) and optional temperature compensation (enhanced accuracy). The system can operate in either mode or combine both, allowing simplified implementation while providing the option for improved accuracy when temperature sensors and compensation algorithms are available
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach ensures reliable tire pressure warnings are issued promptly and accurately, avoiding false positives and negatives, and allows for proper tire pressure adjustments, enhancing driver confidence and system acceptance.
Implementation Method 1
which additionally take into account the temperature-dependent pressure of ideal gases
Data Source
Figure 1~2
AI summary
To improve a method for generating a tire pressure warning (RW) in which it is determined whether the actual tire pressure (WpR) falls below a tire pressure threshold (WpT) and, depending on this, a tire pressure warning (RW) is issued at a warning time (tW), the following steps are provided according to the invention: - Determining a temperature-compensated actual tire pressure (WpK) when a tire pressure warning (RW) is present, wherein the temperature-compensated actual tire pressure (WpK) is determined after the warning time (tW) and depends on -- a reference temperature (TR), wherein the reference temperature (TR) depends on a tire internal temperature (T2) at the warning time (tW), -- an actual tire pressure (WpR) after the warning time (tW), and -- the tire internal temperature (T2) after the warning time (tW);- Determine whether the temperature-compensated actual tire pressure (WpK) exceeds a reset threshold (WpRT), where the reset threshold (WpRT) is greater than the tire pressure threshold (WpT); and - Reset the tire pressure warning (RW) if the temperature-compensated actual tire pressure (WpK) exceeds the reset threshold (WpRT).