Material Feed Vehicle Retarding Control on Downhill Paving Slopes
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Solution Overview
Problem
Conventional manual operation of vehicles feeding material to road finishing machines, such as asphalt paving machines, struggles to maintain a steady speed, especially on downward sloping road surfaces, leading to potential sudden acceleration and deceleration issues.
Innovation Solution
A vehicle retarding system with processing circuitry that determines the slope inclination and adjusts the retardation power level to maintain a consistent speed, ensuring smooth operation by controlling the vehicle's deceleration in conjunction with the road finishing machine, using a brake system that can include electric machines, service brakes, or auxiliary brakes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the vehicle is manually operated by a driver, then the operation is flexible and adaptable, but the speed control becomes difficult and sudden acceleration/deceleration occurs
Solution Approach 1:
The patent replaces manual mechanical operation with an automated control system that uses sensors to detect slope inclination and processing circuitry to calculate and control retarding power, eliminating the need for manual speed control while ensuring steady operation
Solution Approach 2:
The system continuously monitors slope inclination through sensors and uses this feedback to dynamically adjust the retarding power applied to the vehicle, maintaining steady speed by responding to real-time road conditions
2Stability of the object's composition
If the vehicle operates at steady and slow speed to follow the road finishing machine, then the material supply is continuous and smooth, but the ability to respond to changing road conditions deteriorates
Solution Approach 1:
The system dynamically adjusts retarding power based on real-time slope inclination measurements, allowing the vehicle to adapt to changing road conditions while maintaining overall speed stability through controlled, gradual adjustments rather than sudden changes
3Measurement precision
If the vehicle applies higher retarding power on steep slopes to maintain deceleration level, then the speed control precision is improved, but the operator strain increases
Solution Approach 1:
The system performs self-service by automatically calculating the required retarding power based on slope inclination and independently controlling the vehicle's deceleration, eliminating the need for operator intervention and reducing strain while maintaining precise speed control
Solution Approach 2:
The patent replaces manual operator control with an automated system that uses processing circuitry to calculate and control retarding power, substituting human physical and mental effort with electronic control mechanisms
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 solution enables automated and precise control of vehicle speed, reducing operator strain and ensuring continuous, steady material supply to the road finishing machine, improving road surface paving quality by minimizing sudden speed changes.
Implementation Method 1
the vehicle retarding system may be formed by one of, or a combination of, an electric machine generating electric power during braking, one or more vehicle service brakes, an auxiliary vehicle brake, or a brake resistor
Implementation Method 2
an electric machine generating electric power during braking
Implementation Method 3
a brake resistor
Data Source
AI summary
A method of operating a vehicle feeding material to a road finishing machine. The vehicle includes a vehicle retarding system controllable to retard the vehicle, and processing circuitry coupled to the vehicle retarding system. The method includes determining, by the processing circuitry, a slope inclination of a downward sloping road surface to be paved by the road finishing machine; determining, by the processing circuitry, a deceleration level of the vehicle for operating the vehicle at the downward sloping road surface while obtaining a mechanical connection between the vehicle and the road finishing machine when the road finishing machine paves the downward sloping road surface; determining, by the processing circuitry, a retardation power level of the vehicle retarding system based on the slope inclination of the downward sloping road surface for obtaining the deceleration level; and controlling, by the processing circuitry, the vehicle retarding system to apply the retardation power level for obtaining the deceleration level.