Vehicle Shift Lever Cover for Tactile Gear Feedback
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Solution Overview
Problem
Existing vehicle transmission apparatuses, particularly shift-by-wire systems, lack intuitive gear shifting mechanisms that allow drivers to easily distinguish between different gear stages through tactile feedback, leading to potential confusion and distraction during operation.
Innovation Solution
A transmission apparatus with a shift lever that includes a bottom portion for linear movement and a rotatably coupled body, featuring a cover that moves based on gear shift commands, utilizing a potentiometer and rotary encoder to measure rotation angles and adjust the cover's position, and tact switches for intuitive gear shifting, allowing drivers to sense gear changes through tactile feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a shift-by-wire system is used to eliminate mechanical cable connections, then lever operation force and lever operation feeling are improved, but tactile feedback for distinguishing gear stages is lost
Solution Approach 1:
A cover is introduced as an intermediary element between the driver and the shift lever mechanism. The cover moves to different positions corresponding to different gear stages (P, R, N, D), providing tactile feedback to the driver without requiring direct mechanical connection between the lever and transmission system. This mediator transmits positional information through contact with the driver's finger.
Solution Approach 2:
The patent uses positional changes of the cover as a visual and tactile indicator system. The cover's position (different locations along the lever) serves as a clear indicator of the current gear stage, similar to how color changes indicate state. This allows the driver to distinguish gear stages through the cover's position rather than relying on mechanical cable feedback.
2Difficulty of detecting and measuring
If a mechanical cable connection structure is used in the shift lever, then tactile feedback for gear stages is provided, but lever operation force increases and lever operation feeling deteriorates
Solution Approach 1:
The cover acts as a mediator that provides tactile feedback information without requiring mechanical cable connections. It translates the internal gear stage information into external positional information that the driver can sense through light contact, eliminating the need for force-transmitting mechanical cables.
Solution Approach 2:
The patent replaces the mechanical cable connection system with an electronic sensor system (potentiometer or rotary encoder) that detects the lever's position and gear stage. This substitution eliminates the mechanical feedback path while maintaining accurate gear stage detection through electrical sensors, reducing lever operation force while preserving information transmission.
3Illumination intensity
If the cover is made large to improve visibility of gear stage, then gear stage distinction is improved, but device complexity and space requirements increase
Solution Approach 1:
Instead of making the entire cover large, the patent focuses the indicator function on a specific local area - the position of the cover along the lever. The cover's elongated shape along the lever's length provides distinct positional markers for different gear stages without requiring excessive overall size. Each position along the cover's length corresponds to a specific gear stage, providing clear distinction with minimal dimensions.
Data Source
AI summary
A transmission apparatus for a vehicle includes a shift lever in which a cover is movably disposed. The transmission apparatus, which performs a gear shift according to a gear shift command received by the shift lever, includes a bottom portion capable of moving linearly so that gear shift stages including a first gear shift stage and a plurality of second gear shift stages are mutually shifted, a body rotatably coupled to an upper side of the bottom portion so that the plurality of second gear shift stages are mutually shifted, and a cover movably disposed on an upper end of the body so that a position of the cover is varied according to the mutual shift of the gear shift stages.