Tire Pressure Control for Road Construction Machine Traction
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Solution Overview
Problem
The manual adjustment of tire air pressure in self-propelled road construction machines to optimize traction during paving and transportation is time-consuming and costly, affecting fuel consumption and surface finish quality.
Innovation Solution
An automatic or manual traction control system that regulates tire air pressure and screed relief independently for each tire, optimizing traction based on operating mode, surface conditions, and tire pressure, using a tire pressure control unit and compressor for efficient traction management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If tire air pressure is reduced to increase traction during paving, then traction is improved, but fuel consumption increases and driving stability deteriorates
Solution Approach 1:
The patent applies dynamics by making the tire air pressure adjustable and controllable during operation. The system dynamically adapts tire pressure based on operating conditions (paving vs. transportation mode), allowing optimal traction during paving while minimizing fuel consumption during transport. This is achieved through a control unit that regulates air pressure to different tires independently based on detected operating mode.
Solution Approach 2:
The patent changes the physical parameter of tire air pressure to resolve the contradiction. By reducing air pressure in drive tires during paving operations, the contact surface area increases, improving traction. During transportation, air pressure is increased to reduce rolling resistance and fuel consumption. This parameter change is implemented through a control unit that manages air pressure independently for different tires based on operational requirements.
2Force
If tire air pressure is reduced to increase contact surface area, then traction is improved, but driving stability and driving comfort deteriorate
Solution Approach 1:
The patent applies local quality by differentiating air pressure levels for different tires based on their specific functional requirements. Drive tires receive reduced air pressure to maximize traction during paving, while steering and support tires maintain higher air pressure to ensure driving stability and comfort. The control unit independently regulates air pressure to each tire or tire group, creating localized optimal conditions for each tire's function.
3Force
If manual adjustment of tire air pressure is performed, then traction can be optimized, but the process becomes time-consuming and cost-intensive
Solution Approach 1:
The patent implements self-service by enabling the road construction machine to automatically adjust its own tire air pressure without external manual intervention. The control unit detects the operating mode (paving or transportation) and autonomously regulates air pressure to appropriate levels, eliminating the need for operators to manually adjust pressure. This self-regulating system saves time and reduces operational costs while maintaining optimal traction.
Solution Approach 2:
The patent uses feedback mechanisms where the control unit continuously monitors operating conditions and adjusts tire air pressure accordingly. The system detects whether the machine is in paving or transportation mode and provides feedback to the air pressure regulation system, which automatically makes appropriate adjustments. This closed-loop control eliminates manual intervention and ensures optimal traction is maintained throughout operations.
4Force
If independent control of each tire is implemented, then optimal traction can be achieved on uneven surfaces, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the tire pressure control system into independent controllable units for different tires. Each drive tire can have its air pressure independently adjusted based on local ground conditions, allowing optimal adaptation to uneven surfaces. The control unit manages each tire separately, enabling precise traction optimization without requiring complete system redesign, thus balancing complexity with performance.
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 system ensures optimal traction during paving, minimizes fuel consumption, and reduces tire wear, enabling faster and more cost-effective road construction with improved surface quality and reduced risk of tire damage.
Implementation Method 1
a compressor (27) with which an air tank (28) can be filled with compressed air
Implementation Method 2
a tire pressure control unit (33) and a compressor (27) for independent traction management of each tire
Implementation Method 3
The active regulation of the traction of the tires takes place via a change in the screed relief of a screed of the road finisher
Data Source
Figure 1
Figure 2
AI summary
The invention relates to pavers (10) and to feeders, which are used to produce road surfaces. For this purpose, pavers and feeders have a wheeled chassis, in particular pneumatic tires (15). In order to produce the road surface evenly, sufficient traction of the tires (15) is necessary. For this purpose, the tire air pressure of the tires (15) is reduced before the start of the production process and increased again for road travel. The manual adjustment of the tire air pressure to the installation conditions and/or to the operating mode of the road construction machine is time-consuming and costly. Therefore, the application creates a method for operating a self-propelled road construction machine and a road construction machine, by means of which road construction machine the traction of the wheeled chassis can be adjusted quickly and simply. For this purpose, according to the invention, the traction of the tires (15) is monitored and actively controlled in accordance with the operating mode of the road construction machine.