Vehicle Torque Control via Environmental Sensor Feedback
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Solution Overview
Problem
Existing vehicle systems fail to effectively control motor torque based on varying road conditions, passenger weight, and weather, leading to wheel slip issues, especially in wet or icy conditions.
Innovation Solution
A vehicle system that includes sensors to detect precipitation, temperature, weight, and travel speed, along with a controller that adjusts motor torque based on these inputs to maintain a driving force equal to or less than the friction force between the wheels and the road surface, using a storage of correction values for different conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the motor torque is increased to improve acceleration performance, then the power output is improved, but wheel slip occurs on wet or icy road surfaces
Solution Approach 1:
The motor torque is dynamically adjusted based on real-time detection of precipitation and temperature conditions. The controller modifies the torque output according to the detected environmental parameters, allowing the system to adapt to varying road surface conditions and prevent wheel slip while maintaining acceleration performance when conditions permit.
Solution Approach 2:
The system uses precipitation detectors and temperature detectors to continuously monitor environmental conditions and provides feedback to the controller. Based on this feedback, the controller adjusts the motor torque to match the friction force between the wheels and road surface, preventing wheel slip while optimizing power delivery.
2Measurement precision
If multiple sensors and correction values are added to detect precipitation, temperature, and weight, then the control accuracy is improved, but the device complexity increases
Solution Approach 1:
The controller is designed to handle multiple detection functions and adjust motor torque based on various environmental parameters. By making the controller multi-functional, the system avoids the need for separate control units for each sensor type, thereby reducing overall device complexity while maintaining high measurement precision through comprehensive environmental monitoring.
3Reliability
If the motor torque is reduced to prevent wheel slip on slippery surfaces, then wheel slip is prevented, but acceleration performance deteriorates
Solution Approach 1:
The system changes the motor torque parameter dynamically based on detected environmental conditions. When precipitation and temperature indicate slippery road surfaces, the torque is reduced to prevent wheel slip. When conditions improve or are favorable, the torque is increased to restore acceleration performance, thus resolving the contradiction between slip prevention and performance maintenance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system prevents wheel slip by ensuring the driving force is always less than or equal to the friction force, enhancing safety, reducing accidents, and optimizing power and acceleration performance.
Implementation Method 1
a rain detector configured to detect a precipitation
Implementation Method 2
a temperature detector configured to detect an outside temperature
Implementation Method 3
a weight detector configured to detect weight applied to the vehicle
Implementation Method 4
a speed detector configured to detect a travel speed of vehicle
Implementation Method 5
a pressure detector configured to detect a pressure applied to an accelerator pedal
Implementation Method 6
a motor configured to apply a driving force to the plurality of wheels
Implementation Method 7
maintain a driving force equal to or less than the friction force between the wheels and the road surface
Data Source
AI summary
A vehicle includes a plurality of wheels; a motor configured to apply a driving force to the plurality of wheels; a rain detector configured to detect a precipitation; a temperature detector configured to detect outside temperature; and a controller configured to control a torque of the motor based on the precipitation detected by the rain detector and the outside temperature detected by the temperature detector.