Integrated Stability Control Torque Braking Sequence
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Solution Overview
Problem
Existing vehicle stability control systems, such as brake-, torque-, and drivetrain-based systems, often fail to provide smooth stabilization, especially at high speeds and in response to driver input, leading to undesirable vehicle dynamics and increased driver workload.
Innovation Solution
An integrated electronic stability control system that combines drivetrain-based torque control with a braking function, utilizing sensors like yaw rate, acceleration, and steering sensors to generate torque signals and apply stability corrections to individual wheels, prioritizing torque control before brake control to enhance stability and reduce driver workload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If brake-based ESC systems are used to stabilize the vehicle, then vehicle stability is improved, but the stabilization smoothness deteriorates
Solution Approach 1:
The patent combines drivetrain-based torque control with brake-based stability control into an integrated ESC system. The controller coordinates both systems to work together, where drivetrain control provides primary stabilization and brake control provides supplementary correction, achieving both stability and smoothness simultaneously
Solution Approach 2:
The system applies drivetrain-based torque control before applying brake control. By preemptively using torque reduction to correct unstable conditions, the system prevents the need for aggressive brake intervention, thereby maintaining both stability and smooth operation
2Adaptability or versatility
If drivetrain-based ESC systems are used to adjust vehicle dynamics, then adaptability to driver input is improved, but effectiveness at high speeds deteriorates
Solution Approach 1:
The integrated ESC system merges drivetrain-based control with brake-based control to create a hybrid system that leverages the strengths of both approaches. Drivetrain control handles low-speed adaptability while brake control provides reliable high-speed stabilization
Solution Approach 2:
The system dynamically switches between and combines drivetrain-based and brake-based control strategies based on vehicle operating conditions. At high speeds, brake control becomes more prominent while maintaining drivetrain control for adaptability, creating a dynamic control system that excels across all speed ranges
Data Source
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AI summary
A vehicle stability system for a vehicle. In an embodiment the vehicle stability system includes a yaw rate sensor, an acceleration sensor, a steering sensor, a torque request sensor, and a controller. The controller is configured to receive an output of the yaw rate sensor, the lateral acceleration sensor, the steering sensor, and the torque request sensor, generate a torque signal and a braking signal, and transmit the torque signal to a differential in addition to transmitting the braking signal to a braking system.