Shift Lever Recognition Using Movement Direction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional shift manipulation apparatuses face difficulties in accurately recognizing the selected shift stage when the shift lever stops ambiguously between neighboring stages due to frictional forces or sensor errors, particularly in distinguishing between closely located + and N stages.
Innovation Solution
A method that includes movement sensing, direction sensing, stop position determination, and shift recognizing steps to identify the selected shift stage by determining the stage just before the overlap section based on the shift lever's movement direction, ensuring stable recognition even when the lever stops between stages or sensor errors occur.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the shift lever stops position is used to recognize the selected shift stage, then the shift stage recognition is straightforward, but the recognition becomes ambiguous when the shift lever stops between neighboring stages due to frictional forces or mechanical structure
Solution Approach 1:
The system performs preliminary action by detecting the movement direction of the shift lever before it stops. The controller stores this movement direction information and uses it in conjunction with the stop position to determine which shift stage was intended, even when the lever stops ambiguously between stages. This preliminary detection of movement direction resolves the ambiguity that would otherwise occur.
Solution Approach 2:
The movement direction information acts as an intermediary element that mediates between the ambiguous stop position and the shift stage recognition. When the stop position alone is insufficient for accurate recognition (i.e., when the lever stops between stages), the stored movement direction serves as additional information to correctly identify the intended shift stage.
2Speed
If sensor detection is used to identify shift stage selection, then real-time detection is achieved, but sensor errors or damage cause incorrect recognition particularly between closely located + and N stages
Solution Approach 1:
The system uses feedback by continuously monitoring the movement direction of the shift lever and storing this information. When a stop position is detected, the controller retrieves the stored movement direction feedback to make the final determination of the selected shift stage. This feedback mechanism compensates for sensor errors by providing additional verification information.
Solution Approach 2:
The movement direction is detected and stored in advance before the final shift stage determination is made. This preliminary detection creates a record that can be referenced even if sensor readings at the moment of stopping are ambiguous or erroneous, particularly helping to distinguish between closely located stages like + and N.
3Reliability
If multiple sensors are used to detect shift lever position and manual mode selection, then detection coverage is improved, but sensor failure or deviation from regular course causes detection errors
Solution Approach 1:
The movement direction information serves as an intermediary that bridges the gap when primary sensors fail or provide ambiguous readings. By storing and referencing this directional information, the system can correctly identify the selected shift stage even when sensor detection is compromised, particularly in distinguishing between closely located stages.
Data Source
AI summary
A stable operation performance of a shift operation apparatus is ensured by allowing the shift lever to be stably recognized using a specific shift stage even in the case where the shift lever has stopped ambiguously between the two neighboring shift stages, and to exactly recognize by judging more exactly which one of the other shift stages, such as + stage and N stage, has been selected even in the case where sensor errors of a sensor for sensing whether the M stage or a manual mode has been selected occur.