Motor-Driven Actuator for Active Roll Control
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Solution Overview
Problem
Conventional active roll control systems for vehicles face challenges in quickly and precisely controlling vehicle roll due to their complex hydraulic pressure systems, which complicate layout and reduce controllability.
Innovation Solution
An actuator system that converts motor rotation into linear reciprocal movement using a lead screw in a screw housing, transmitting this movement to a stabilizer bar via a joint, eliminating the need for hydraulic pressure systems and incorporating an impact absorbing unit to disperse road impacts, thus enhancing controllability and simplifying layout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hydraulic pressure cylinder is used to actively control vehicle roll, then roll control capability is improved, but device complexity increases due to the hydraulic pressure supply system
Solution Approach 1:
The invention extracts and eliminates the complex hydraulic pressure supply system (hydraulic pressure pump, hydraulic pressure valve, hydraulic lines) from the active roll control system, replacing it with a motor-driven actuator that directly adjusts the stabilizer bar length to control vehicle roll
Solution Approach 2:
The invention replaces the hydraulic pressure system with a mechanical actuator system consisting of a motor, lead screw, and power transmitter, converting rotational motor movement into linear movement to adjust the stabilizer bar length and control roll
2Adaptability or versatility
If a hydraulic pressure cylinder is used to actively control vehicle roll, then roll control capability is improved, but layout complexity increases requiring additional brackets
Solution Approach 1:
The invention removes the need for additional brackets and complex mounting structures required by the hydraulic pressure cylinder, using a compact motor-driven actuator that integrates directly into the suspension system with simplified layout
3Device complexity
If conventional stabilizer bar is used to suppress vehicle inclination, then structural simplicity is maintained, but roll control speed and precision deteriorate
Solution Approach 1:
The invention transforms the stabilizer bar system from a passive static structure to an active dynamic system by introducing a motor-driven actuator that can dynamically adjust the stabilizer bar length in real-time, enabling quick and precise roll control while maintaining structural simplicity
4Device complexity
If conventional stabilizer bar is used to suppress vehicle inclination, then structural simplicity is maintained, but roll control precision deteriorates
Solution Approach 1:
The invention enables precise roll control by making the stabilizer bar system dynamic and adjustable through the motor actuator, which can precisely control the stabilizer bar length to achieve accurate roll suppression while keeping the overall structure simple
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 actuator system improves vehicle roll control by dynamically adjusting torsional rigidity of the stabilizer bar, simplifies the layout by eliminating hydraulic components, and enhances durability by absorbing impacts, leading to improved controllability and reduced complexity.
Implementation Method 1
a lead screw in a screw housing converts rotation movement of a motor into linear reciprocal movement
Implementation Method 2
it disperses impact transmitted from a vehicle body and a road
Data Source
AI summary
An actuator for an active roll control system that connects a stabilizer bar with a lower arm may include a screw housing having a space, a power transmitter slidably mounted in an upper interior circumference of the screw housing, and having an upper end portion connected to one end of the stabilizer bar and a lower end portion slidably movable in the space wherein the lower end portion of the power transmitter includes a screw groove and a screw thread is formed at an interior circumference of an inlet portion, a lead screw being inserted in the screw groove of the power transmitter and threaded to the screw thread of the inlet portion and having a screw rotation shaft integrally connected to a lower end thereof, and a drive motor mounted at a lower portion of the screw housing and having a rotation shaft connected to the screw rotation shaft.