Accelerator Pedal Map Calibration for Personalized EV Torque Control
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Solution Overview
Problem
Existing electric vehicles rely on a single pre-calibrated accelerator pedal map, failing to accommodate diverse driving styles and personalized user preferences, leading to suboptimal driving experiences.
Innovation Solution
A method for calculating an accelerator pedal map that considers multiple operating points, vehicle speed, pedal position, and driving modes, incorporating conversion coefficients and resistance torques to personalize torque control and enhance driving comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single pre-calibrated accelerator pedal map is used, then the device complexity is reduced, but the adaptability to different driving styles and user preferences deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of the accelerator pedal map by introducing multiple driving modes (economic mode, normal mode, sport mode) with different conversion coefficients. The system dynamically selects and switches between these pre-calibrated maps based on the selected driving mode, enabling real-time adaptation to different driving styles without requiring complex real-time calculation algorithms. This resolves the contradiction by providing adaptability through dynamic mode switching while maintaining relatively simple calibration procedures.
Solution Approach 2:
The patent changes the conversion coefficient parameter n based on different driving modes and operating conditions. By pre-calibrating multiple accelerator pedal maps with different conversion coefficients for economic, normal, and sport modes, the system achieves adaptability to various driving styles. The control unit selects the appropriate conversion coefficient based on the current driving mode, resolving the contradiction between adaptability and calibration complexity through parameter variation.
2Adaptability or versatility
If multiple pre-calibrated accelerator pedal maps are provided for different driving modes, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The patent performs preliminary calibration of multiple accelerator pedal maps for different driving modes (economic, normal, sport) before actual use. The conversion coefficients for each driving mode are pre-calculated and stored in the control unit. During operation, the system simply selects the pre-prepared map corresponding to the current driving mode, avoiding the need for complex real-time calculations. This resolves the contradiction by achieving personalized torque control through advance preparation while keeping the operational system relatively simple.
Solution Approach 2:
The patent segments the accelerator pedal map into multiple independent calibration sets, each corresponding to a specific driving mode (economic mode map, normal mode map, sport mode map). Each segment has its own conversion coefficient optimized for that particular driving style. The control unit selects the appropriate segment based on the current mode, resolving the contradiction between personalized control and complexity by dividing the problem into manageable, pre-solved segments.
3Adaptability or versatility
If real-time updates of accelerator pedal map are implemented, then the adaptability to user preferences improves, but the loss of time for calibration increases
Solution Approach 1:
The patent performs preliminary calibration of multiple accelerator pedal maps for different driving modes before actual use. The conversion coefficients are pre-calculated and stored, allowing the system to switch between different driving styles instantly without requiring time-consuming real-time calibration. This resolves the contradiction by providing real-time adaptability through pre-computed solutions, eliminating calibration time during operation.
Solution Approach 2:
The patent implements dynamic switching between pre-calibrated accelerator pedal maps based on the selected driving mode. The system maintains multiple ready-to-use conversion coefficients and dynamically selects the appropriate one based on user preference and driving conditions. This provides real-time customization capability without requiring time-consuming calibration during operation, as the calibration work is done in advance for each mode.
Data Source
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AI summary
The present application relates to the technical field of accelerator pedal map calibration, and provides a method for calculating an accelerator pedal map, a computer-readable storage medium and a computer device. The method for calculating an accelerator pedal map comprises the following steps: selecting a plurality of operating points, obtaining a vehicle speed v and an actual pedal position signal corresponding to each operating point, and calculating an actual pedal travel L1 based on the actual pedal position signal; calculating a pedal travel L0 where the operating point is at a steady-state throttle point, and determining a driving torque T1 based on L1, L0 and a current conversion coefficient n between a pedal travel and a motor driving torque; calculating a torque currently required for the vehicle to overcome driving resistance as a resistance torque T2; obtaining a sum of the driving torque T1 and the resistance torque T2 as a target output torque of the vehicle; and storing the actual pedal travel L1, vehicle speed v and target output torque corresponding to each operating point as an accelerator pedal map.