Vehicle Pedal Transfer Function Adjustment for Energy Conservation
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Solution Overview
Problem
Vehicles, especially electric and hybrid vehicles, face energy conservation challenges due to inefficient driving habits that lead to rapid starts and stops, increasing energy consumption and emissions, and limited geographical access to refilling stations.
Innovation Solution
A method that adjusts the relationship between accelerator pedal position and powertrain torque request based on geographical location, weather conditions, and prior travel history to optimize energy use, reducing wheel slip and improving drivability by modifying torque and braking power requests.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the vehicle provides high performance feel with increased torque request, then driver satisfaction improves, but energy consumption increases
Solution Approach 1:
The system dynamically adjusts the accelerator pedal transfer function based on geographical location, weather conditions, and travel history. The relationship between accelerator pedal position and torque request is made variable rather than fixed, allowing the system to optimize between performance feel and energy consumption根据不同 conditions
Solution Approach 2:
The system changes the parameters of the accelerator pedal transfer function (torque request vs. pedal position relationship) based on external conditions such as geographical location, weather, and historical travel data. This allows optimization of energy consumption while maintaining appropriate performance characteristics for different driving scenarios
2Use of energy by moving object
If the vehicle reduces torque request to conserve energy, then energy consumption decreases, but drivability and performance feel deteriorate
Solution Approach 1:
The system makes the torque request dynamic by adjusting the accelerator pedal transfer function based on real-time conditions including geographical location, weather, and travel history. This ensures that energy conservation measures do not permanently degrade drivability but are contextually appropriate
Solution Approach 2:
The system modifies the parameters of the torque request relationship based on environmental and operational conditions, allowing energy consumption to be reduced when appropriate while maintaining drivability when needed
3Loss of energy
If the vehicle increases regenerative braking power, then energy recovery improves, but wheel locking risk increases
Solution Approach 1:
The system uses feedback from geographical location data, weather conditions, and historical travel information to adjust regenerative braking power requests. This feedback mechanism allows the system to maximize energy recovery while avoiding conditions that would lead to wheel locking
Solution Approach 2:
The system changes the regenerative braking power request parameters based on external conditions such as location, weather, and historical data, optimizing energy recovery while maintaining safety by reducing regenerative braking when wheel locking risk is present
4Use of energy by moving object
If the vehicle adjusts torque and braking based on geographical location and conditions, then energy conservation improves, but system complexity increases
Solution Approach 1:
The system uses a multi-functional approach where a single controller integrates multiple functions: geographical location determination, weather condition monitoring, travel history analysis, and both torque request and braking power optimization. This consolidates complexity into a unified system rather than separate components
Solution Approach 2:
The system manages complexity by dynamically adjusting parameters of existing control relationships (accelerator pedal transfer function, braking power request) rather than adding new hardware components, achieving energy conservation through software-based parameter optimization
Data Source
AI summary
Methods and systems for operating axles of a vehicle are provided. In one example, relationships between accelerator pedal position and driver demand torque may be adjusted as a function of a vehicle's geographical location. Further, a relationship between brake pedal position and requested braking amount may be adjusted as a function of a vehicle's geographical location.