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 that uses a rod with hinging means and a damper device to dampen rolling movements within a predetermined angular range, allowing for symmetrical control of both front wheels without significantly increasing the system's dimensions or costs, using smaller and more cost-effective actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a roll control system is added to prevent uncontrolled rolling movements, then stability is improved, but device complexity increases
Solution Approach 1:
The rod integrates multiple functions: it connects the two front wheels, serves as a structural element of the forecarriage, and acts as the control element for dampening rolling movements. This merging of functions reduces the number of separate components needed while maintaining stability control capability.
Solution Approach 2:
The rod is designed as a multi-functional element that simultaneously provides structural support, connects both front wheels to the forecarriage, and enables roll control through the damper device. This universal design reduces overall system complexity while achieving the stability improvement.
2Stability of the object's composition
If traditional roll blocking systems are used to prevent uncontrolled rolling, then stability is improved, but the dimensions and costs of actuators increase
Solution Approach 1:
The system transitions from static roll blocking to dynamic roll dampening. The damper device allows controlled rolling movements within a predetermined angular range rather than completely blocking rotation, enabling the use of smaller, less powerful actuators that reduce system dimensions and costs while maintaining stability.
Solution Approach 2:
The control approach changes from binary (blocked/not blocked) to continuous (dampened within angular range). By controlling the damping parameter rather than complete blocking, the system achieves stability with smaller actuator capacity, reducing dimensions and costs.
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 reduces the risk of instability at standstill or low speeds by dampening rolling movements, preventing uncontrolled unbalance, and combining simple installation with a small footprint, using smaller actuators that reduce overall dimensions and costs.
Implementation Method 1
said first damper device being suitable to dampen (in a predetermined angular range) the rotation movements of the rod with respect to the first roll hinge
Data Source
AI summary
The present invention relates to a forecarriage of a rolling motor vehicle with three or four wheels, comprising: a forecarriage frame (16); at least one pair of front wheels (10′, 10″) kinematically connected to each other and to the forecarriage frame by a kinematic roll mechanism (20) which enables the same to roll in a synchronous and specular manner; a roll control system (100) comprising a rod (110) having a first (111) and a second end (112) opposite each other which connect by means of hinging means (101′, 101″; 102′, 102″) a first (60) and a second anchoring portion (60) of forecarriage (8) directly to each other. At least one of said first and second anchoring portions is subject to roll movements of said two front wheels. The hinging means are configured to passively follow the movements of the two anchoring portions. The hinging means (101′, 101″) at the first end of the rod comprise at least a first roll hinge (101′) which has its hinge axis substantially orthogonal to a rolling plane of the two front wheels and is connected to the first anchoring portion. The roll control system comprises 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 (111). The above angular range corresponds to the angular roll range of the rod.