Suspension Pre-Adjustment for Stable Vehicle Launch Control
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Solution Overview
Problem
Existing vehicle control systems fail to provide a configuration that enables smooth and quick start of a vehicle, particularly for small and lightweight vehicles employing launch control, which often result in undesirable vehicle attitude changes due to sudden increases in driving force.
Innovation Solution
A vehicle control system and device that adjusts the damping force and vehicle height of suspensions through a control unit, performing change control processing when both deceleration and starting operations are initiated while the vehicle is stopped, to stabilize the vehicle before the vehicle starts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If launch control is activated to enable sudden start and acceleration, then the vehicle can accelerate quickly, but the vehicle attitude becomes unstable due to instant increase in driving force
Solution Approach 1:
The control unit performs preliminary action by adjusting suspension parameters (damping force and/or vehicle height) before the vehicle actually starts moving. When the launch control condition is detected (brake pedal and accelerator pedal operated simultaneously while stopped), the system pre-adjusts the suspension to an appropriate state that prevents attitude changes during the subsequent sudden acceleration, thereby resolving the contradiction between quick acceleration and attitude stability.
Solution Approach 2:
The invention applies parameter changes by dynamically modifying suspension characteristics (damping force and vehicle height) based on the detected operating conditions. The control unit changes these parameters in advance when launch control is activated, optimizing the suspension performance to maintain vehicle attitude stability during the transient phase of sudden acceleration from stopped state.
2Stability of the object's composition
If damping force is increased to prevent nosedive during braking, then vehicle attitude stability improves, but the vehicle response during start becomes sluggish
Solution Approach 1:
The invention applies dynamics by making the suspension characteristics variable rather than fixed. The control unit dynamically adjusts damping force and/or vehicle height based on real-time detection of operating conditions. When braking is detected, damping force is increased to prevent nosedive; when launch control is detected, parameters are adjusted to optimize start response. This dynamic adaptation resolves the contradiction between attitude stability during braking and quick response during start.
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
Enables smooth and quick start of vehicles, particularly small and lightweight ones, by stabilizing vehicle attitude during launch control, ensuring consistency with the launch control and preventing undesirable attitude changes.
Implementation Method 1
a control unit configured to control at least one of a damping force of the suspensions and a vehicle height of the vehicle
Data Source
AI summary
In a vehicle control system S and a vehicle control device 100, when both a deceleration operation unit 52 and a starting operation unit 54 are operated while a vehicle 1 is stopped, a control unit 166 performs change control processing before the vehicle 1 starts, the change control processing changing one of a damping force of suspensions 30 and 40 and a vehicle height in a case where the one is controlled and changing both of the damping force of the suspensions 30 and 40 and the vehicle height in a case where the both elements are controlled.