Tire Pressure Adjustment System with Flow Resistance Measurement
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Solution Overview
Problem
Conventional tire pressure monitoring and adjustment systems for agricultural vehicles are inefficient, as they cannot automatically adjust tire pressure to different settings for tires of varying sizes and pressures without user intervention, and require time-consuming pressure equalization and measurement processes.
Innovation Solution
A method that allows air to flow between the tire and a high-pressure reservoir, measures air pressure at separated points, and uses a calibration function to estimate tire pressure, enabling precise adjustment of tire pressure to any desired level between the reservoir and ambient pressure without interrupting the air flow, allowing for simultaneous adjustment of different tires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a common distribution line connects all tires to a single accumulator, then the system structure is simple, but it cannot adjust different tire pressures independently for tires of different sizes
Solution Approach 1:
The patent divides the common distribution line into separate lines for front and rear tires, with independent control valves for each tire. This segmentation allows each tire to be adjusted independently to different pressure levels, resolving the contradiction between simple structure and flexible pressure adjustment.
2Extent of automation
If pressure sensors are arranged on both sides of a throttle to detect air flow direction, then the system can detect pressure equalization, but it cannot measure the actual tire pressure value
Solution Approach 1:
The patent introduces a capillary tube as an intermediary element between the tire and the pressure sensor. The capillary tube creates a pressure drop that allows the sensor to measure a pressure difference, which can be used to calculate the actual tire pressure. This resolves the contradiction by enabling precise pressure measurement while maintaining automated detection.
3Measurement precision
If the distribution line is flooded with compressed air from the tire for pressure measurement, then the measurement can be performed, but the air flow interruption lengthens the pressure adjustment process
Solution Approach 1:
The patent enables continuous air flow through the distribution line while simultaneously performing pressure measurements. The capillary tube allows pressure sensing without interrupting the air flow, so pressure adjustment and measurement occur concurrently, eliminating time loss and resolving the contradiction.
4Measurement precision
If tire pressure is adjusted manually with user intervention, then precise pressure control is possible, but the adjustment process requires significant user time and effort
Solution Approach 1:
The patent implements an automated feedback control system where pressure sensors continuously monitor tire pressure, and control valves automatically adjust pressure based on sensor readings and target pressure values. This eliminates manual user intervention while maintaining precise pressure control, resolving the contradiction between accuracy and time consumption.
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
Enables quick and precise tire pressure adjustment, reducing the time required for pressure changes and allowing for independent pressure settings for each tire, optimizing energy efficiency and minimizing soil compaction.
Implementation Method 1
measuring an air pressure - hereinafter referred to as tire side - at a tire-side measuring point of the line, which is separated from the reservoir and from the tire by a flow resistance
Data Source
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AI summary
A method for measuring the pressure in a pneumatic tire comprises the following steps: a) allowing air to flow through a line (7) connecting the pneumatic tire (9) to a pressure reservoir (4), b) measuring a tire-side air pressure (p15) at a tire-side measuring point (15) of the line (7), which is separated from the reservoir (4) and the tire (9) by a flow resistance, c) estimating the tire pressure (prad) using a calibration function that has the tire-side air pressure (P16) and a reservoir-side air pressure (p15) as variables