Accelerator Pedal Open Degree Guidance for EV Fuel Efficiency
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Solution Overview
Problem
Conventional systems for guiding the accelerator pedal in electric vehicles lack direct and intuitive feedback, as the visual information provided does not align with the physical quantity of the pedal input, making it difficult for drivers to achieve economical driving effectively.
Innovation Solution
A method and system that calculates and displays a target open degree of the accelerator pedal based on target instant fuel efficiency, using a controller to receive input from sensors, calculate torque, and display the target and actual open degrees in the same physical quantity, thereby providing direct guidance to drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If visual information is provided to display vehicle state in cluster, then driver can understand economical driving, but the physical quantity unit of displayed information is different from accelerator pedal input, creating a gap between visual feedback and actual input
Solution Approach 1:
The patent transforms the displayed information from power/fuel efficiency units to accelerator pedal open degree percentage, matching the physical quantity of the pedal input. This parameter transformation allows the visual feedback to directly correspond to the driver's pedal action, eliminating the unit mismatch and improving intuitive understanding.
Solution Approach 2:
The system creates a visual copy of the accelerator pedal open degree on the display, showing both the actual pedal position and the target pedal position as percentages. This visual replication in the same physical quantity enables direct comparison and guidance without requiring the driver to mentally convert between different units.
2Measurement precision
If conventional visual information is displayed showing fuel efficiency gauge in power or fuel efficiency units, then driver can see current efficiency, but the displayed gauge length and timing do not match the accelerator pedal physical quantity, making input not intuitively displayed
Solution Approach 1:
The patent converts the fuel efficiency measurement into an equivalent accelerator pedal open degree value. Instead of displaying only power or fuel efficiency units, the system calculates and displays the target pedal open degree as a percentage, which directly matches the pedal's physical quantity and provides intuitive feedback.
Solution Approach 2:
The system provides real-time feedback by displaying both the actual pedal open degree and the target pedal open degree on the cluster. This feedback mechanism allows the driver to immediately see the difference between current and desired pedal positions, enabling continuous adjustment for optimal fuel efficiency.
Data Source
AI summary
A method of guiding an accelerator pedal of an electric vehicle includes calculating a target instant fuel efficiency, calculating a target torque corresponding to the target instant fuel efficiency, calculating a target open degree of the accelerator pedal based on the target torque, receiving an actual open degree of the accelerator pedal manipulated by a driver, and displaying the target open degree of the accelerator pedal and the actual open degree of the accelerator pedal.