EV Virtual Manual Shifter With Switchable Gear Patterns
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Solution Overview
Problem
Existing shifting devices for electric vehicles with virtual manual transmission systems limit the number of selectable torque characteristics and virtual gear stages, making it difficult for drivers to confirm the selected gear and restricting the customization of shift patterns.
Innovation Solution
A shifting device with an indicator and an indication switcher that allows drivers to select from a variety of shift patterns and torque characteristics, enabling the assignment of virtual gear stages to shift positions and allowing for arbitrary customization of shift patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of virtual gear stages is increased to provide more torque characteristics, then the drivability and customization are improved, but the number of shift positions in the indicator must be increased which increases device complexity
Solution Approach 1:
The shift pattern is made changeable through the indication switcher, allowing the same physical shift positions to represent different virtual gear stages based on the selected pattern. This dynamic reconfiguration enables multiple virtual gear stages to be accessed through a fixed number of physical positions.
Solution Approach 2:
The indication switcher changes the parameter representation of the shift positions. By switching between different shift patterns, the same physical positions are assigned to different virtual gear stages, effectively increasing the number of accessible torque characteristics without adding physical positions.
2Device complexity
If multiple virtual gear stages are assigned to one shift position due to space limitations, then device complexity is reduced, but the driver cannot confirm the selected gear stage directly from the shift lever position
Solution Approach 1:
The indicator serves as an intermediary between the shift lever and the virtual gear stage selection. It visually displays which virtual gear stage corresponds to each shift position, allowing the driver to confirm the selected gear stage without needing to interpret the physical lever position directly.
Solution Approach 2:
The mechanical direct correspondence between shift lever position and gear stage indication is replaced with an electronic/optical indication system. The indicator visually represents the gear stage assignment, substituting the need for direct mechanical confirmation.
3Device complexity
If the shift pattern is fixed in the indicator, then device complexity is reduced, but the driver cannot select different shift patterns to customize torque characteristics
Solution Approach 1:
The shift pattern is made dynamic and changeable through the indication switcher. Drivers can switch between different shift patterns (e.g., P-R-N-D-S, P-R-N-3-2-1) to customize the assignment of virtual gear stages to shift positions, adapting to different driving preferences and conditions.
Solution Approach 2:
The indication switcher enables the shift device to perform multiple functions by allowing different shift patterns to be selected. The same physical shift lever and indicator structure can accommodate various gear stage assignments, making the system universally adaptable to different driving needs.
Data Source
AI summary
A shifting device for an electric vehicle having a virtual manual transmission system, that is configured to realize a variety of shift patterns and torque characteristics. The shifting device comprises: an indicator that indicates a shift pattern; and an indication switcher that switches the shift pattern indicated in the indicator to another pattern. At least any one of the number of the shift positions and a virtual gear stage assigned to the shift position in the shift pattern switched by the indication switcher is different from that in the previous shift pattern indicated in the indicator before switched by the indication switcher.