Vehicle Sway Bar Actuator with Sensor Magnet Encoder
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Solution Overview
Problem
Conventional sway bar systems in vehicle suspension lack an efficient mechanism for engaging and disengaging the sway bar, leading to ineffective force absorption during turns, which can result in uneven vehicle stability and increased wear on suspension components.
Innovation Solution
A sway-bar actuator system that includes a motor-operated lead rod and push rod mechanism, an attachment fork, and a sensor assembly with a single sensor magnet and encoder, allowing for precise axial and rotational operations to switch between engaged and disengaged positions of the stabilizing bars, utilizing an electromagnetic securing assembly and clock spring for controlled engagement and disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sway bar system is used without an efficient engagement and disengagement mechanism, then the structure remains simple, but vehicle stability is compromised and suspension component wear increases
Solution Approach 1:
The sway bar system is segmented into engageable and disengageable sections through the actuator mechanism. The attachment fork divides the stabilizing bars into opposing pairs that can operate independently when disengaged, allowing the system to transition from a unified rigid structure to separable functional units based on driving conditions
Solution Approach 2:
The system transitions from a static fixed configuration to a dynamic reconfigurable structure. The actuator enables the sway bar to dynamically switch between engaged (unified operation) and disengaged (independent operation) states, adapting the stabilizing bar configuration to varying vehicle handling requirements and suspension conditions
2Measurement precision
If multiple sensors are used to monitor attachment fork position, then measurement precision improves, but system reliability decreases due to potential systemic failures and miscommunication
Solution Approach 1:
Multiple sensing functions are merged into a single sensor assembly that integrates the sensor magnet, encoder, and position detection capabilities. This unified sensor system eliminates the need for multiple separate sensors, reducing potential failure points while maintaining precise measurement of the attachment fork's axial position through the sensor rod's axial operation
Solution Approach 2:
The single sensor assembly performs multiple functions: it detects the axial position of the attachment fork, determines engagement/disengagement state, and provides feedback for motor control. This multi-functional sensor system replaces what would traditionally require multiple specialized sensors, improving reliability while preserving measurement precision
3Stability of the object's composition
If the stabilizing bars are fixed in unified operation, then vehicle structural stability is maintained, but adaptability to different driving conditions is reduced
Solution Approach 1:
The stabilizing bars transition from a static unified configuration to a dynamic reconfigurable system. The actuator enables the bars to switch between unified operation (for structural stability) and independent operation (for adaptability), allowing the system to optimize performance based on real-time driving conditions and suspension requirements
Solution Approach 2:
The system changes its operational parameters by transitioning between engaged and disengaged states. When engaged, the stabilizing bars operate with unified parameters for maximum stability; when disengaged, they operate with independent parameters for enhanced adaptability to varying road conditions and vehicle handling requirements
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 system provides improved vehicle stability by allowing independent operation of stabilizing bars, reducing rotational force transfer and enhancing sway bar functionality, while simplifying the sensor system to prevent systemic failures and miscommunication.
Implementation Method 1
a motor that rotationally operates a lead rod. Rotation of the lead rod axially operates a push rod
Implementation Method 2
A sensor assembly has a rotator and a sensor magnet. Axial operation of the sensor rod produces a rotational operation of the sensor magnet. The sway-bar actuator includes an encoder, where a rotational position of the sensor magnet relative to the encoder corresponds to an axial position of the attachment fork
Implementation Method 3
An electromagnetic securing assembly includes an electromagnet and a clutch disk in selective communication with the drive gear. Activation of the electromagnet biases the clutch disk against the drive gear and secures the drive gear in a predetermined rotational position
Data Source
AI summary
A sway-bar actuator for a vehicle includes a motor that rotationally operates a lead rod to axially operates a push rod. Operation of the push rod axially operates an attachment fork between an engaged position and a disengaged position. The engaged position is characterized by a unified operation of opposing stabilizing bars. The disengaged position is characterized by independent rotational operation of the opposing stabilizing bars. A sensor rod is coupled to and operates axially with the attachment fork. A sensor assembly has a rotator and a sensor magnet. Axial operation of the sensor rod produces a rotational operation of the sensor magnet. The sway-bar actuator includes an encoder, where a rotational position of the sensor magnet relative to the encoder corresponds to an axial position of the attachment fork and the push rod relative to the engaged and disengaged positions.