Towed Vehicle Wheel Actuation for Sway and Jackknife Control

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Solution Overview

Problem

Towing a vehicle introduces unique stability challenges such as sway and jackknifing due to external conditions like crosswinds and load shifts, which can lead to accidents, especially for inexperienced drivers.

Innovation Solution

A stabilization system that analyzes sensor data to generate a stability signature, actuating wheels to counteract instability conditions by adjusting steering and gyroscopic effects to maintain vehicle stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a vehicle is towed by another vehicle, then the towed vehicle can be transported without additional equipment, but the towed vehicle experiences instability such as sway and jackknifing due to external conditions like crosswinds and load shifts

Engineering Contradiction:

Improvetowing capabilityVSAvoidvehicle stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The system continuously monitors sensor data from the towed vehicle and its environment, generates a stability signature characterizing external conditions, and automatically adjusts wheel actuation in response to detected instability thresholds. This closed-loop feedback mechanism dynamically compensates for sway and jackknifing forces without requiring manual driver intervention or mechanical stability enhancements to the towing arrangement.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

Instead of using mechanical devices to physically stabilize the towed vehicle (such as stabilizer bars or mechanical linkages), the system substitutes a control system that actuates the wheels through force generation. The wheel actuation creates counteracting forces that mitigate instability, replacing passive mechanical stabilization with active force-based control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If the driver manually controls the towed vehicle to mitigate instability, then some level of stability can be achieved, but inexperienced drivers may not react quickly or effectively enough to prevent accidents

Engineering Contradiction:

Improvestability control reliabilityVSAvoiddriver control difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The towed vehicle's stabilization system operates autonomously without requiring driver input or attention. The control system self-monitors stability conditions through sensors, self-diagnoses instability thresholds by generating stability signatures, and self-corrects by automatically actuating the wheels. This eliminates the need for driver skill or rapid manual reaction to instability conditions.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The control system acts as an intermediary between the unstable towed vehicle and the driver. Rather than requiring the driver to directly manage complex stabilization maneuvers, the system mediates by automatically processing sensor data, determining instability conditions, and executing wheel actuation commands, thereby shielding the driver from the complexity of stability control.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Stability of the object's composition

If the wheels of the towed vehicle are actuated to counteract instability, then vehicle stability is improved, but the system complexity increases due to sensors and control mechanisms

Engineering Contradiction:

Improvevehicle stabilityVSAvoidstabilization system complexity

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The control system leverages existing multi-functional components of the towed vehicle. The wheels serve both their primary function of enabling vehicle movement and their secondary function of providing stability control through actuation. The control system integrates with existing vehicle sensors and actuators, making the stabilization capability emerge from the vehicle's existing infrastructure rather than requiring entirely new specialized components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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

Effectively mitigates sway and jackknifing by autonomously controlling wheels, enhancing safety and control of towed vehicles under various operating conditions.

Implementation Method 1

actuating wheels to counteract instability conditions by adjusting steering and gyroscopic effects to maintain vehicle stability

Methodology Applied

Scientific EffectGyroscopic effect: Gyroscope

Data Source

PatentUS20250368182A1Actuating wheels of towed vehicle to mitigate for instability

Publication Date: 2025.12.04 TOYOTA RESEARCH INSTITUTE INC

AI summary

Systems and methods are provided for improved stability of a towed vehicle by mitigating disturbances due to external conditions that may negatively impact the stability. Examples mitigate these disturbances by controlling vehicle systems of the towed vehicle based on recognizing an onset of a disturbance. For examples, the systems and methods can control one or more wheels of the towed vehicle in a manner selected to counteract the disturbances, thereby mitigating negative impact resulting therefrom.