Roll Control System for Three-Wheeled Vehicle Forecarriage
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Solution Overview
Problem
Narrow wheel track three-wheeled motor vehicles face instability at standstill or low speeds due to uncontrolled rolling movements, and existing roll control systems either fail to prevent uncontrolled unbalance or require large, costly actuators and increased dimensions.
Innovation Solution
A roll control system for the forecarriage of a motor vehicle using a rod with hinging means and a damper device that connects the front wheels to the frame, allowing for dampening of rolling movements within a predetermined angular range without blocking, thus reducing instability and unbalance risks while using smaller, cost-effective actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a roll block system is provided to prevent uncontrolled rolling movements at standstill or low speeds, then stability is improved, but the vehicle may trigger uncontrolled unbalance and fall due to rigid blocking
Solution Approach 1:
The patent applies dynamics by replacing the static, rigid blocking mechanism with a dynamic damping system. The damper device allows the rolling movements to continue but controls them within a predetermined angular range, adapting the resistance force to the motion state rather than imposing a fixed constraint. This resolves the contradiction by maintaining stability through controlled damping while preserving the vehicle's ability to balance itself through natural rolling movements.
Solution Approach 2:
The patent changes the parameter of motion control from binary (blocked/not blocked) to continuous (damped within angular range). By defining a predetermined angular range and damping forces that vary with the roll angle and velocity, the system transforms the rigid parameter of blocking into a flexible parameter of controlled damping, eliminating the risk of uncontrolled unbalance while maintaining stability.
2Stability of the object's composition
If existing roll control systems are used to dampen rolling movements, then stability is improved, but large and costly actuators are required increasing device dimensions and costs
Solution Approach 1:
The patent applies self-service by designing a system where the damping force is generated passively through the mechanical configuration of the damper device and connecting rod, without requiring external power sources or complex actuators. The system uses the vehicle's own rolling movements to generate the damping effect, eliminating the need for large, costly actuators while maintaining stability control within the predetermined angular range.
Solution Approach 2:
The patent extracts the active control function from the system by removing the need for powered actuators entirely. Instead of using actuators to actively dampen rolling movements, the invention extracts only the essential damping function and achieves it through passive mechanical means, significantly reducing device complexity and cost while maintaining the stability improvement.
3Stability of the object's composition
If roll control systems with rigid blocking are implemented, then rolling movements are prevented, but maneuverability is reduced and installation becomes more complex
Solution Approach 1:
The patent applies dynamics by replacing static blocking with dynamic damping that adapts to the vehicle's motion state. The damper device provides resistance only when rolling movements exceed the predetermined angular range, allowing free maneuverability within normal operating conditions while maintaining stability when needed. This resolves the contradiction by making the constraint adaptive rather than rigid.
4Stability of the object's composition
If roll control systems are added to the forecarriage, then stability is improved, but installation complexity and cost increase
Solution Approach 1:
The patent extracts the essential stability control function from complex powered systems and implements it through simple passive mechanical components. The damper device and connecting rod configuration provides roll control without requiring actuators, control electronics, or complex installation procedures, significantly improving ease of manufacture and installation while maintaining the stability benefit.
Solution Approach 2:
The patent employs simple, inexpensive mechanical components rather than costly powered systems. The damper device and connecting rod are basic mechanical elements that can be manufactured and installed at low cost, replacing expensive actuators and control systems while achieving the same stability improvement through passive damping.
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 system effectively reduces the risk of instability at low speeds by dampening rolling movements without causing uncontrolled unbalance, while allowing for simpler installation and smaller actuator sizes, maintaining maneuverability and safety without significant increases in dimensions or costs.
Implementation Method 1
a first damper device suitable to dampen - in a predetermined angular range - the rotation movements of the rod with respect to the first roll hinge at the first end
Data Source
AI summary
Forecarriage of a rolling motor vehicle including a forecarriage frame, a pair of front wheels, a roll control system comprising a rod having including a first damper device for dampening rotation movements of the rod, and including a kinematic connecting rod-crank connected to the rod and to a first anchoring portion to define an articulated quadrilateral, an actuator for imparting a shift movement to the rod-crank and to vary the configuration of the rod-crank between: a damped rolling configuration and a rolling configuration, where the first damper device further includes release means to assist the actuator in the passage from the damped rolling configuration to the free rolling configuration.