Adaptive Driveforce Control for Weather-Dependent Traction
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Solution Overview
Problem
Conventional automobiles fail to adapt driveforce output to ambient conditions, leading to traction issues in inclement weather, causing tires to lose traction and spin rapidly.
Innovation Solution
An adaptive electronic driveforce unit control system that includes a weather detection system, a driveforce map, and a processor to adjust the driveforce curve based on weather data, reducing the driveforce output during low-traction conditions to prevent tire spin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driveforce unit delivers the same amount of output for a corresponding depression of the accelerator pedal regardless of ambient conditions, then the vehicle maintains consistent performance across different conditions, but the tires lose traction and spin rapidly in low-traction conditions
Solution Approach 1:
The driveforce map is made dynamically adjustable based on detected weather conditions. The processor modifies the driveforce curve in real-time according to environmental factors such as rain, snow, or ice detection, allowing the system to adapt between fixed performance characteristics and variable traction requirements.
Solution Approach 2:
The system changes the driveforce parameter (torque output) based on detected weather conditions. By detecting ambient conditions and adjusting the driveforce curve accordingly, the system modifies the relationship between accelerator pedal position and actual torque delivery to prevent tire spin in low-triction conditions.
2Reliability
If the processor decreases the driveforce curve in inclement weather, then the likelihood of tire spin is reduced, but the vehicle acceleration capability is diminished
Solution Approach 1:
The system dynamically changes the driveforce parameter based on detected weather conditions. By detecting ambient conditions and adjusting the driveforce curve accordingly, the system modifies the relationship between accelerator pedal position and actual torque delivery to prevent tire spin while maintaining optimal acceleration when conditions permit.
Solution Approach 2:
The system uses feedback from weather detection systems (moisture sensors, temperature sensors, windshield wiper detection) to continuously adjust the driveforce map. This closed-loop approach allows the system to respond to changing conditions and optimize the balance between traction control and acceleration capability.
3Measurement precision
If the system uses multiple sensors (moisture detection, temperature sensing, windshield wiper detection) to detect weather conditions, then the accuracy of weather detection is improved, but the device complexity increases
Solution Approach 1:
The system uses multiple sensors that serve both their primary functions and weather detection functions. For example, the windshield wiper detection system not only controls wiper operation but also provides weather condition information for driveforce adjustment, eliminating the need for dedicated weather sensors.
Solution Approach 2:
The system uses existing vehicle components and sensors to detect weather conditions rather than adding dedicated weather detection hardware. The moisture detection system, temperature sensor, and windshield wiper detection system are leveraged to provide weather information, allowing the vehicle systems to serve multiple purposes.
Data Source
AI summary
The present invention is a method and system for adaptive electronic driveforce unit control based on the weather. An automobile can include, for example a driveforce system. The driveforce system can include a driveforce unit, an acceleration input device, a memory, a speed sensor, and/or a weather detection system. The acceleration input device can generate acceleration input data. The driveforce unit can generate an output based on the corresponding acceleration input data from a driveforce curve in a driveforce map. The driveforce map can be stored in the memory. The speed sensor can detect speed data indicating a speed and/or acceleration of the automobile. The weather detection system includes a moisture detection system detecting moisture data, a temperature sensor detecting temperature data, and a windshield wiper detection system detecting windshield wiper data. The processor adjusts the driveforce curve in the driveforce map based on the weather data.