Tire Warmup Control for Consistent Vehicle Launch Traction
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Solution Overview
Problem
Existing methods for warming rear tires in performance vehicles, such as those used in drag or track racing, often result in under-warming or over-warming, leading to reduced traction and increased tire wear, as they rely on driver judgment and are influenced by engine speed variations and pavement conditions.
Innovation Solution
A method that adjusts the spinning of driven wheels based on vehicle performance parameters during a previous launch, including tire slip, lateral speed, and yaw rate, to precisely control burn out duration and rotational speed, using sensors like wheel speed and radar odometry sensors to optimize tire warming and reduce driver dependency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a manual timer is used to control burn out duration, then the system is simple to operate, but the tire warming precision is insufficient due to driver judgment errors and engine speed variations
Solution Approach 1:
The system uses sensors to detect tire temperature and burn out execution status, then feeds this information back to the controller which automatically adjusts the burn out duration and engine speed to achieve precise tire warming, eliminating the need for manual timer adjustment by the driver
Solution Approach 2:
The manual mechanical timer system is replaced with an electronic control system that uses sensors and automated control algorithms to determine burn out duration based on real-time tire temperature and vehicle performance data
2Reliability
If burn out duration is extended to ensure sufficient tire warming, then tire traction is improved, but tire wear increases excessively
Solution Approach 1:
The controller continuously monitors tire temperature during the burn out process and automatically terminates the burn out when the optimal temperature range is reached, preventing both under-warming (which would reduce traction) and over-warming (which would excessive wear)
Solution Approach 2:
The system dynamically adjusts burn out duration and engine speed parameters based on real-time tire temperature measurements to maintain optimal warming without excessive wear
3Reliability
If driver manually controls engine speed during burn out, then the system is easy to operate, but the burn out consistency is poor due to driver skill variations
Solution Approach 1:
The system automatically controls engine speed and burn out duration based on sensor feedback, making the system self-regulating and eliminating the need for driver skill and judgment in controlling the burn out process
Solution Approach 2:
The controller receives feedback from sensors monitoring tire temperature and burn out status, then automatically adjusts engine speed to maintain consistent and optimal burn out performance across different driving conditions
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
This approach ensures optimal tire traction while minimizing wear, leading to more efficient vehicle launches and extended tire life by accurately adjusting burn out parameters based on real-time performance feedback.
Implementation Method 1
spinning the rear (driven) tires on pavement until they become hot due to friction
Data Source
AI summary
Methods and systems are provided for warming vehicle tires prior to a vehicle launch event. In one example, a method may include, in response to an initiation of a burn out event while locking non-driven wheel brakes, adjusting a spinning of driven wheels based on vehicle performance parameters measured during a previous vehicle launch. In this way, a vehicle controller may control the tire warming to increase tire traction while reducing tire wear.