Suspension Control Apparatus for Vehicle Cornering Stability
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Solution Overview
Problem
Conventional suspension control apparatuses fail to provide an excellent driving feeling to passengers by excessively reducing changes in vehicle posture and interfering with the driver's intended acceleration/deceleration, leading to a mismatch in harmonized lateral and longitudinal accelerations during cornering.
Innovation Solution
A suspension control apparatus that includes a lateral jerk detector and a suspension controller to adjust the vehicle's pitch based on detected lateral jerk, coordinating pitch changes with lateral acceleration to emulate the smooth behavior of a skilled driver's cornering operation, using actuators like damping force adjustable shock absorbers or active suspensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional suspension control apparatuses extremely reduce changes in vehicle posture, then vehicle stability is improved, but driving feeling deteriorates
Solution Approach 1:
The suspension control apparatus dynamically adjusts the damping force based on detected lateral jerk values. When lateral jerk exceeds a threshold, the system increases damping force to reduce body roll and improve stability. When lateral jerk is within acceptable ranges, the system reduces damping force to allow natural vehicle behavior and maintain good driving feeling. This dynamic adjustment resolves the contradiction between stability and driving feeling.
2Stability of the object's composition
If vehicle operation control apparatuses intervene in driver's acceleration/deceleration operation, then vehicle behavior control is improved, but driver intent synchronization deteriorates
Solution Approach 1:
The invention extracts and controls only the suspension system's damping force based on lateral jerk detection, while completely leaving the driver's acceleration and deceleration operations untouched. This selective control approach allows the system to improve vehicle behavior during cornering without interfering with driver intent or causing timing mismatches in acceleration/deceleration operations.
3Stability of the object's composition
If conventional suspension control apparatuses reduce body roll during cornering, then vehicle posture stability is improved, but harmonized acceleration behavior deteriorates
Solution Approach 1:
The system changes the damping force parameter dynamically based on detected lateral jerk values. By adjusting this parameter in response to cornering conditions, the system achieves both reduced body roll for posture stability and harmonized acceleration behavior that matches skilled driver operations. The damping force is increased when needed for stability and reduced when natural behavior is desired.
Data Source
AI summary
A suspension control apparatus enabling a driver to obtain an excellent driving feeling. The suspension control apparatus controls an actuator disposed between a vehicle body and a wheel of a vehicle. The suspension control apparatus includes a lateral acceleration detector operable to detect a lateral acceleration, a lateral jerk detector operable to detect a lateral jerk, and a suspension controller operable to control the actuator to change a pitch of the vehicle based the detected lateral acceleration and lateral jerk.