Start Support Apparatus for Electric Vehicle Driving Force Gap
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Solution Overview
Problem
Drivers of electromotive vehicles face anxiety due to difficulty in determining the required driving force for starting, as they cannot aurally sense the driving force from the silent electric motor, and existing imitative engine sound techniques are not effective for unfamiliar drivers.
Innovation Solution
A start support apparatus with a requested driving force calculation portion, a startable driving force calculation portion, and an indication portion that calculates and displays the gap between the requested and startable driving forces, allowing drivers to determine the necessary driving force and adjust it accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If imitative engine sound is generated in accordance with motor rotation, then driver can aurally sense driving force, but unfamiliar driver cannot judge how much sound volume corresponds to required driving force
Solution Approach 1:
The patent introduces an intermediary information display that mediates between the imitative engine sound and the driver's understanding. The display shows the relationship between sound volume and driving force magnitude, acting as a translator that converts acoustic information into visual quantitative information, thereby resolving the information loss for unfamiliar drivers
Solution Approach 2:
The system provides feedback by displaying the correlation between imitative sound volume and actual driving force. This feedback loop allows drivers to learn and understand the relationship between sound and force, gradually reducing their dependence on the visual aid while maintaining accurate judgment of driving force magnitude
2Measurement precision
If driver relies on empirical learning to understand sound-volume-to-force relationship, then driver can determine driving force, but anxiety cannot be relieved easily
Solution Approach 1:
The patent applies preliminary action by providing the information display about sound-volume-to-force relationship before the driver needs to make driving force determinations. This pre-provisioning of knowledge eliminates the need for time-consuming empirical learning during actual driving situations, immediately reducing driver anxiety
3Device complexity
If no driving force guidance is provided, then device complexity is low, but driver feels anxious at starting
Solution Approach 1:
The patent segments the driving support function into distinct modules: the imitative engine sound generation module and the information display module. This segmentation allows the system to provide comprehensive driving force guidance while maintaining clear functional separation, preventing excessive system complexity while improving driver confidence
Data Source
AI summary
A start support apparatus to be disposed in an electromotive vehicle includes a requested driving force calculation portion, the startable driving force calculation portion, and an indication portion. The requested driving force calculation portion calculates a requested driving force that is generated at a motor based on operation by a driver of the electromotive vehicle. The startable driving force calculation portion calculates a startable driving force that is required to be generated at the motor for starting the electromotive vehicle. The indication portion shows a degree of gap between the requested driving force and the startable driving force.