Vehicle Torque Feedback Control for Powerhop Mitigation
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Solution Overview
Problem
Powerhop, a detrimental phenomenon in vehicle dynamics, causes sudden vertical tire and suspension movement, leading to loss of traction and stability, particularly in high-performance cars. Existing technologies lack real-time identification and effective mitigation strategies for powerhop.
Innovation Solution
A system and method utilizing one or more computers configured to receive sensor data, including wheel speed and ride height, to determine wheel jerk characteristics and identify powerhop. The system adjusts the vehicle's torque in response to detected powerhop to mitigate its effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If excessive torque is transmitted to the wheels in high-performance cars, then acceleration performance is improved, but powerhop occurs causing loss of traction and stability
Solution Approach 1:
The system continuously monitors wheel speed data and ride height measurements, processes this information through a controller to detect powerhop conditions, and provides real-time feedback by adjusting torque output. This closed-loop feedback mechanism allows the system to maintain acceleration performance while actively preventing powerhop-induced stability loss through dynamic torque modulation.
Solution Approach 2:
The system dynamically changes the torque parameter transmitted to the wheels based on detected wheel jerk characteristics and ride height variations. By modulating the torque parameter in real-time according to powerhop detection algorithms, the system optimizes acceleration performance while preventing the excessive torque conditions that trigger powerhop and stability loss.
2Stability of the object's composition
If real-time powerhop identification is implemented, then vehicle stability is improved, but system complexity increases
Solution Approach 1:
The controller is designed to perform multiple functions: it processes wheel speed data for powerhop detection, monitors ride height measurements, executes powerhop identification algorithms, and manages torque adjustment commands. By consolidating these diverse functions into a single multi-functional controller, the system achieves real-time powerhop identification and stability improvement without proportionally increasing overall system complexity.
Solution Approach 2:
The system utilizes existing vehicle sensors (wheel speed sensors and ride height sensors) that are already part of the vehicle's standard instrumentation. By leveraging these pre-existing sensing capabilities and processing their data through powerhop detection algorithms, the system achieves real-time identification without requiring entirely new sensing infrastructure, thereby limiting the increase in system complexity.
3Strength
If torque adjustment is applied to mitigate powerhop, then traction is improved, but acceleration performance may be reduced
Solution Approach 1:
The system applies torque adjustment in periodic pulses rather than continuous reduction. When powerhop is detected, the controller temporarily modulates torque to mitigate the phenomenon, then restores full torque output once the powerhop condition subsides. This periodic action pattern allows the system to maintain traction during powerhop events while preserving overall acceleration performance between events.
Solution Approach 2:
The torque adjustment is applied partially and selectively only when powerhop conditions are detected, rather than continuously reducing torque. The system applies just enough torque modulation to mitigate powerhop and restore traction, then returns to full torque output for normal acceleration. This partial action approach minimizes the impact on acceleration performance while effectively improving traction during powerhop events.
Data Source
AI summary
A method for powerhop identification and mitigation includes receiving sensor data of a vehicle, such as wheel speed; determining a wheel jerk characteristics of the vehicle based on the wheel speed; determining a ride height of the vehicle; determining whether the vehicle is experiencing powerhop based on the wheel jerk characteristics and the ride height of the vehicle; and in response to determining that the vehicle is experiencing powerhop, adjusting a torque of the vehicle to mitigate the powerhop.