Vehicle Suspension Control Device for Brake Stability
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Solution Overview
Problem
Existing vehicle suspension control systems fail to effectively stabilize vehicle behavior, particularly during brake and throttle operations, due to inadequate control of damping forces between the vehicle body and wheels.
Innovation Solution
A control device that adjusts damping forces in damping devices based on the difference between front-rear acceleration of the vehicle body and rotational acceleration of the wheels, using filtering processes to determine optimal damping control strategies for antilock brake and traction control systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional suspension control systems are used, then the basic vehicle operation is maintained, but the vehicle behavior becomes unstable during sudden brake and throttle operations due to inadequate damping force control
Solution Approach 1:
The damping force control system dynamically adjusts damping forces based on real-time detection of vehicle body acceleration and wheel rotational acceleration. The control device modifies damping forces in response to changing vehicle states during brake and throttle operations, transforming the static suspension system into an adaptive dynamic system that maintains stability while preserving steering responsiveness.
Solution Approach 2:
The system changes the damping force parameter of the damping devices based on the detected acceleration difference between the vehicle body and wheels. By varying the damping force according to the calculated difference value, the system optimizes vehicle behavior stability during transient operations while maintaining ease of operation under normal conditions.
2Stability of the object's composition
If damping forces are increased to reduce suspension oscillations, then vehicle stability improves, but the steering feel and responsiveness may deteriorate
Solution Approach 1:
The system dynamically modulates damping forces rather than maintaining a fixed high damping state. By detecting the acceleration difference and adjusting damping forces in real-time, the system provides strong damping only when suspension oscillations occur during brake or throttle operations, while allowing free movement and maintaining responsiveness during normal steering operations.
Solution Approach 2:
The control system applies different damping forces to different damping devices (front and rear) based on local detection of wheel and vehicle body accelerations. Each damping device is controlled independently according to its specific operating conditions, allowing targeted stabilization of suspension oscillations while preserving steering responsiveness in the front suspension.
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 solution stabilizes vehicle behavior by reducing vibrations and improving steering feel during sudden brake and throttle operations, enhancing the overall stability and reducing the amplitude and duration of suspension oscillations.
Implementation Method 1
a damping device (21d, 22d) which dampens a force generated between the vehicle main body (10) and the vehicle wheel (2, 3)
Data Source
AI summary
A control device is configured to control a damping force of a damping device using a difference between a front-rear acceleration of a vehicle main body and a rotational acceleration of a vehicle wheel, the damping device being configured to dampen a force generated between the vehicle main body and the vehicle wheel.