Locking Differential Lock-State Detection for Torque Trap Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing locking differentials in vehicles can remain locked even after the electromagnetic coil is switched off, leading to unintended torque traps, and there is a lack of real-time feedback to the driver regarding the lock state.
Innovation Solution
An electronically locking differential assembly with a lock actuation mechanism using an armature and stator assembly, and a lock detect mechanism that includes a switch to provide feedback on the lock state, ensuring the driver is informed of the differential's locked or unlocked status, even if it remains locked or open due to torque traps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a locking mechanism is provided in the differential assembly, then torque distribution control is improved, but the risk of unintended torque traps increases
Solution Approach 1:
A lock detection mechanism is integrated into the differential assembly to detect and provide real-time feedback on the lock state to the driver. This feedback system includes a lock detect mechanism that monitors whether the locking mechanism is engaged or disengaged, and communicates this status to the driver through the vehicle's display system, preventing unintended torque traps by ensuring the driver is informed of the actual lock state.
Solution Approach 2:
The lock detection mechanism acts as an intermediary between the locking mechanism and the driver. It includes a detector that monitors the position of the locking mechanism and a communication system that conveys this information to the driver, serving as a mediator that bridges the gap between the mechanical locking system and the driver's awareness.
2Loss of information
If real-time lock state feedback is provided to the driver, then driver awareness and control are improved, but device complexity increases
Solution Approach 1:
The lock detection mechanism is integrated into the existing differential assembly structure, utilizing existing components and communication systems. The detection mechanism leverages the vehicle's existing display and communication infrastructure to convey lock state information, rather than requiring a completely separate feedback system, thereby reducing overall complexity.
Solution Approach 2:
The locking mechanism itself includes integrated detection capabilities that automatically monitor its own state. The lock detect mechanism is built into the locking assembly, allowing it to self-monitor and self-report its status without requiring external detection systems, simplifying the overall architecture.
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 ensures real-time assurance to the driver that the differential is in the intended lock state, preventing unintended locking and providing accurate feedback, thus enhancing vehicle control and safety.
Implementation Method 1
the actuator could include a ball ramp mechanism in which rotation of a ramp plate is retarded relative to the gear case, this initiating ramping, in response to a signal being transmitted to an electromagnetic coil disposed adjacent the ramp plate
Data Source
AI summary
An electronically locking differential assembly constructed in accordance to the present disclosure includes a differential casing, a first and second side gear, a lock actuation assembly and a lock detect mechanism. The lock actuation mechanism selectively moves between a locked state where the side gears are fixed for concurrent rotation and an unlocked state where the side gears rotate relative to each other. The lock detect mechanism detects whether the lock actuation mechanism is in the locked, unlocked state, and an intermediate position between the locked and unlocked state; then provides feedback to the driver on the state of the lock actuation mechanism.