Single-Axle Dolly Auto-Coupling via Variable Height Suspension
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Solution Overview
Problem
Existing self-powered dolly vehicles require manual intervention for complex and time-consuming coupling procedures, which can be optimized for improved handling and fuel efficiency.
Innovation Solution
A single axle dolly vehicle unit with an electrical energy source powering electric machines for wheel propulsion, equipped with a variable height suspension system and a control unit for auto-coupling, utilizing sensors and remote control capabilities to adjust the fifth wheel connection height and drawbar position for seamless trailer attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual coupling procedure is used, then operator control is maintained, but coupling time and operational complexity increase
Solution Approach 1:
The dolly vehicle performs coupling operations autonomously without requiring manual intervention. The control unit automatically controls the suspension system to adjust fifth wheel height and position, enabling the vehicle to service itself during coupling procedures, thereby reducing coupling time and operational complexity
Solution Approach 2:
Manual mechanical coupling operations are replaced with an automated control system that uses sensors to detect trailer position and control signals to operate the suspension system, substituting human-operated mechanical procedures with an electronic control-based system
2Extent of automation
If variable height suspension system is added for auto-coupling, then coupling automation is enabled, but device complexity increases
Solution Approach 1:
The variable height suspension system serves multiple functions: it provides ride comfort during normal operation and enables auto-coupling by automatically adjusting the fifth wheel height to match the trailer kingpin height. This multi-functionality justifies the added complexity by eliminating the need for separate coupling mechanisms
Solution Approach 2:
The suspension system transitions from a static structure to a dynamic, actively controlled system that can adjust its height in real-time based on coupling requirements, enabling the dolly to adapt its configuration for optimal coupling performance
3Measurement precision
If sensors and control systems are integrated, then coupling precision is improved, but manufacturing cost increases
Solution Approach 1:
Sensors detect the position and height of the trailer kingpin and provide feedback to the control unit, which then adjusts the suspension system accordingly. This closed-loop feedback mechanism ensures precise coupling while using standard sensing and control technologies to manage manufacturing complexity
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
The solution simplifies the coupling process, enhances fuel efficiency, and improves vehicle handling by enabling autonomous or semi-autonomous trailer attachment, reducing manual intervention and operational complexity.
Implementation Method 1
an electrical energy source arranged to power at least one electric machine configured to drive left and right wheels
Data Source
Figure 1A~1B
Figure 2A
Figure 2B~3
AI summary
A single axle dolly vehicle unit (130) for a heavy duty vehicle combination (100), the dolly vehicle unit (130) comprising an electrical energy source arranged to power at least one electric machine configured to drive left and right wheels of the single axle, the dolly vehicle unit (130) further comprising a drawbar and a fifth wheel connection for mating with first (120) and second (140) trailer units, respectively, wherein the fifth wheel connection is arranged to be adjusted in height over ground (h) by a variable height suspension system, the dolly vehicle unit (130) further comprising a control unit arranged to control the variable height suspension system.