Switchable Linear Actuator for Coupling Mode Control
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Solution Overview
Problem
Current coupling apparatus, such as one-way clutches, lack efficient control mechanisms for switching between operating modes, leading to parasitic losses and complexity in traditional designs, especially in vehicular transmissions.
Innovation Solution
A switchable linear actuator device with magnetic sources producing translational forces, utilizing a stator structure with electromagnetic sources and a translator structure with a permanent magnet, allowing for axial movement between stable positions to control the coupling assembly's operating modes, leveraging magnetic fields for latching and translational forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional one-way clutch designs are used, then the structure is simple, but parasitic losses occur and control efficiency is reduced
Solution Approach 1:
The patent replaces traditional mechanical control mechanisms (springs, hydraulic systems) with a magnetic field-based control system. The magnetic actuator uses electromagnetic fields to control the locking members, eliminating the need for mechanical springs and hydraulic pumps, thereby reducing parasitic losses while maintaining simple operation
Solution Approach 2:
The magnetic actuator system is designed to be self-latching through magnetic field interaction. Once the locking members are engaged or disengaged, the magnetic field maintains the position without requiring continuous energy input, making the system self-sufficient and minimizing ongoing parasitic losses
2Adaptability or versatility
If controllable one-way clutches with multiple locking members are used, then multiple operating modes are achieved, but device complexity increases
Solution Approach 1:
The magnetic actuator serves multiple functions: it engages locking members, disengages locking members, and maintains positioned states. This single magnetic control mechanism replaces what would traditionally require multiple separate mechanical or hydraulic control systems, achieving multiple operating modes without proportional increases in complexity
Solution Approach 2:
The patent uses magnetic field interaction to control multiple locking members simultaneously. The magnetic actuator replaces complex mechanical linkages and hydraulic valve systems with a unified electromagnetic control approach, reducing overall system complexity while enabling multiple operating modes
3Ease of operation
If hydraulic pumps and valves are used for control, then operating modes can be switched, but parasitic losses and complexity increase
Solution Approach 1:
The patent replaces hydraulic pumps, valves, and fluid control systems with a magnetic field-based actuator. The magnetic actuator directly controls the locking members through magnetic attraction and repulsion, eliminating the need for hydraulic infrastructure and associated parasitic losses from fluid circulation and valve operation
Solution Approach 2:
The magnetic actuator system uses permanent magnets and electromagnetic fields to create self-latching positions. Once locking members are moved to desired positions, the magnetic field configuration maintains these positions without requiring continuous hydraulic pressure or active valve control, eliminating ongoing parasitic losses
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 enables near-zero parasitic losses and efficient mode switching in coupling assemblies, reducing complexity and eliminating the need for hydraulic systems, while maintaining stable equilibrium positions.
Implementation Method 1
The device includes a stator structure having at least one electromagnetic source and a translator structure including a permanent magnet source magnetically coupled to the stator structure across a radial air gap
Implementation Method 2
The translator structure translates along the axis between the different positions upon experiencing the net translational force comprising a first translational force caused by energization of the at least one electromagnetic source and a latching force based upon linear position of the permanent magnet source along the axis
Data Source
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AI summary
Device and apparatus for controlling the operating mode of a coupling assembly, coupling and control assembly and electric motor disconnect and pass through assemblies are provided. The device is a switchable linear actuator device to control the operating mode of a coupling assembly. A plurality of magnetic sources produce corresponding magnetic fields to create a net translational force. A stator structure includes at least one electromagnetic source and a translator structure includes a permanent magnet source magnetically coupled to the stator structure across a radial air gap. The translator structure is supported for translational movement relative to the stator structure along an axis between first and second stable axial end positions which correspond to first and second operating modes of the coupling assembly and an unstable axial equilibrium position between the end positions. The translator structure translates along the axis between the different positions upon experiencing the net translational force.