Dial Shift Lever Friction Control for Mal-Operation Prevention
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Solution Overview
Problem
The durability of circuit boards in dial type shift levers is compromised due to frequent malicious manipulation by drivers, leading to mal-operation and overload, as the shift lever system lacks effective mechanisms to prevent mischievous handling.
Innovation Solution
A dial type shift lever apparatus featuring a rotation knob with a shift feeling unit, a friction device, and a controller that detects malicious manipulation by maintaining or repeatedly entering a null section, applying frictional force to deter such actions, and incorporating a vibration unit and warning system to alert the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a dial type shift lever is designed to be easily manipulated for smooth gear shifting, then the ease of operation is improved, but the shift lever becomes vulnerable to malicious manipulation and circuit board overload
Solution Approach 1:
The friction device is activated in advance to prevent malicious manipulation before it can damage the circuit board. When the controller detects abnormal manipulation patterns (such as rapid or excessive rotations), it preemptively engages the friction rod to create resistance, counteracting the malicious input before it reaches the PCB and causes overload or durability issues.
Solution Approach 2:
The friction device acts as an intermediary between the rotation knob and the transmission control unit. When malicious manipulation is detected, the friction rod contacts the rotation knob to provide mechanical resistance, serving as a mediator that blocks abnormal signals from reaching the controller and protecting the downstream circuit board from damage.
2Reliability
If a friction device is activated to prevent malicious manipulation of the shift lever, then the reliability of the circuit board is improved, but the ease of operation deteriorates due to increased frictional resistance
Solution Approach 1:
The friction device operates dynamically rather than statically. The friction rod is engaged only when the controller detects malicious manipulation patterns, such as rapid successive rotations or rotations in abnormal sequences. During normal gear shifting operations, the friction device remains disengaged, allowing smooth operation without resistance. This dynamic activation ensures that the frictional force is applied only when needed for protection.
Solution Approach 2:
The system changes the friction parameter conditionally based on manipulation detection. When normal operation is detected, the friction coefficient between the friction rod and rotation knob is effectively zero (disengaged state). When malicious manipulation is detected, the friction parameter is changed to a high resistance state through engagement, creating sufficient frictional force to deter further malicious input while maintaining normal operability during legitimate use.
3Reliability
If the friction rod continuously contacts the rotation knob to prevent malicious manipulation, then the protection against mal-operation is improved, but the operating force required increases excessively
Solution Approach 1:
The friction device employs periodic rather than continuous action. The controller continuously monitors rotation knob position and manipulation patterns, activating the friction device only during periods when malicious manipulation is detected. Between detection events, the friction rod remains disengaged from the rotation knob. This periodic activation pattern provides protection against mal-operation while minimizing the force requirement during normal operation periods.
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
Prevents mal-operation and reduces circuit board overload by increasing the operating force of the shift lever, making it difficult for drivers to perform mischievous manipulations and providing clear warnings to correct their actions.
Implementation Method 1
a friction device mounted in the shift lever case and including a friction rod that generates frictional force in a response that the friction device is moved to the rotation knob to contact with the rotation knob during an operation
Implementation Method 2
a bullet which is mounted at the rotation knob, is rotatable along with the rotation knob, and is elastically inserted into the detent grooves to be caught by the plurality of detent grooves
Data Source
AI summary
A dial type shift lever apparatus warns and limits a driver of mischievous manipulation of a rotation knob, preventing a mal-operation of gear shift and preventing a printed circuit board (PCB) circuit from being overloaded due to excessive manipulation of the rotation knob.