Active Roll Control Roller Sliding Unit Friction Reduction
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Solution Overview
Problem
Conventional active roll control devices face challenges in minimizing friction resistance in narrow vehicle spaces, which affects the power delivery efficiency of the motor and system downsizing.
Innovation Solution
The implementation of a sliding unit with load rollers and guide rollers on the connector, positioned on the suspension arm, that contact the slide rail surfaces to absorb vertical and moment loads, reducing friction and enhancing motor efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a sliding unit is used in a narrow space to enable compact system design, then the system size is reduced, but friction resistance increases due to vertical load and moment load applied to the sliding unit
Solution Approach 1:
The patent replaces the traditional sliding contact with roller elements that convert sliding friction into rolling friction. The rollers have curved surfaces that contact the slide rail, transforming the linear sliding motion into rolling motion. This curvature-based approach significantly reduces friction resistance while maintaining the compact sliding unit design in narrow spaces.
2Use of energy by moving object
If friction resistance is minimized to improve power delivery efficiency, then motor efficiency increases, but the complexity of the sliding unit structure increases
Solution Approach 1:
The roller elements serve multiple functions simultaneously: they reduce friction through rolling contact, support vertical loads from the vehicle body, and accommodate moment loads through their rotational capability. This multi-functionality allows the sliding unit to maintain compact dimensions while improving power delivery efficiency without proportionally increasing structural complexity.
Solution Approach 2:
The roller elements are designed to rotate dynamically in response to applied loads, adapting their orientation and contact points to optimize friction reduction under varying vertical and moment loads. This dynamic behavior allows the sliding unit to maintain low friction resistance across different operating conditions while using a relatively simple structural configuration.
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 configuration minimizes friction resistance, improving power delivery efficiency and enabling a more compact, downsized active roll control system by effectively managing loads during vehicle operation.
Implementation Method 1
a friction resistance of the sliding unit is a factor that deteriorates the down size of the drive source 6... minimizing the friction resistance between the connector 25 and the slide rail 23
Data Source
AI summary
An active roll control device utilizes driving torque to move a suspension arm side connection point of a stabilizer link connecting both sides of a stabilizer bar with a suspension arm along a sliding unit to actively control vehicle roll. The sliding unit may include slide rails, a load surface on an upper surface and a lower surface, and a guide surface on an inner side surface, a connector is connected to a pushrod of a drive shaft of the operating source and a lower end portion of the stabilizer link through a double ball joint, a plurality of load rollers rotatably disposed on an upper surface and a lower surface of the connector through a roller pin and contacts the load surface of the sliding rail, and guide rollers rotatably on the connector through a roller pin and contacts the guide surface of the sliding rail.