Ignition Module Cam Release Mechanism for Key Fob Extraction
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Solution Overview
Problem
Conventional wireless ignition modules do not allow removal of a key fob when the vehicle is unable to provide sufficient power to actuate the solenoid, causing the fob to remain locked in the ignition module until power is restored.
Innovation Solution
An ignition module with a release mechanism that permits movement of the cam from the ON position to the OFF position when insufficient power is available, allowing the key fob to be removed even during power outages by overriding the locking mechanism using a force applied to the cylinder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solenoid locking mechanism is used to prevent fob removal during vehicle operation, then the fob is securely retained when the vehicle is in the ON state, but the fob cannot be removed when the battery is dead or power is insufficient
Solution Approach 1:
A cam mechanism serves as an intermediary between the user's manual input and the locking system. When the user applies force to rotate the cam, it mechanically drives the levers to disengage the locking condition, allowing fob removal without requiring electrical power for the solenoid
Solution Approach 2:
The system uses the user's own applied force as the energy source to overcome the locking mechanism. By manually rotating the cam, the user provides the mechanical energy needed to actuate the levers and release the lock, making the system self-sufficient during power failures
2Reliability
If an electromagnet is used to maintain the locking state, then the fob remains locked during vehicle operation, but the locking mechanism cannot be actuated when insufficient power is available
Solution Approach 1:
The patent replaces the electrically-driven solenoid with a mechanically-driven lever and cam system. The cam, when rotated by the user, mechanically actuates the levers to change their state from locked to unlocked, eliminating the need for electrical power during the release operation
Solution Approach 2:
The system transitions from a static electromagnetic lock to a dynamic mechanical system where the cam rotation creates motion in the levers. The levers move between different states (first state restricting cam movement, second state permitting cam movement) based on the cam's rotational position, providing a power-independent release mechanism
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
Enables the operator to remove the key fob from the ignition module during power failures, ensuring functionality and user convenience by allowing key fob extraction even when the vehicle's power source is depleted.
Implementation Method 1
An electromagnet may be movable between an extended state and a retracted state and may be movable into the extended state when energized to position and maintain the second lever in the locked state
Implementation Method 2
a cam rotatably supported by the housing between an OFF position and an ON position
Data Source
AI summary
An ignition module includes a housing, a cam, a first lever, a second lever, and an electromagnet is provided. The cam is rotatably supported by said housing between an OFF position and an ON position. The first lever is movable between a first state restricting movement of said cam from said ON position to said OFF position and a second state permitting movement of said cam from said ON position to said OFF position. The second lever is movable between a locked state restricting movement of said first lever from said first state to said second state and an unlocked state permitting movement of said first lever from said first state to said second state. The electromagnet is movable between an extended state and a retracted state. The electromagnet movable into said extended state when energized to position and maintain said second lever in said locked state.