Adjustable Panhard Bar for Wind-Responsive Vehicle Cab Rotation

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Solution Overview

Problem

Existing vehicles face significant wind force resistance on their cabs, particularly on lateral sides, leading to increased energy consumption and environmental emissions, despite the use of wind deflectors on the roof.

Innovation Solution

A system that adjusts the length of an adjustable panhard bar connecting the vehicle cab to the chassis, using sensor data from lateral wind sensors to rotate the cab relative to the chassis, reducing wind force resistance by optimizing the cab's orientation based on wind direction and magnitude.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If wind deflectors are arranged on the roof of the vehicle cab, then wind force resistance from the front is reduced, but wind force resistance from lateral sides remains significant

Engineering Contradiction:

Improvewind force resistanceVSAvoidcab orientation adaptability

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The panhard bar is made adjustable in length to dynamically change the cab's orientation relative to the chassis. By varying the panhard bar length, the cab can be rotated to different angles to adapt to wind conditions from different directions, transforming a static structure into a dynamic one that responds to environmental changes

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the geometric parameter of the panhard bar length to alter the cab's orientation angle. By adjusting this physical parameter, the cab can be positioned at optimal angles relative to wind direction, reducing wind force resistance from lateral sides while maintaining the benefits of front wind deflectors

Inventive Principle:

Principle #35Parameter changes

2Use of energy by moving object

If the cab is rotated to reduce wind force resistance, then energy consumption is reduced, but the complexity of the adjustment system increases

Engineering Contradiction:

Improveenergy consumptionVSAvoidpanhard bar adjustment system

Core Design Contradiction:

Use of energy by moving objectVSDevice complexity

Solution Approach 1:

Wind sensors detect wind direction and force magnitude, providing feedback to the control system. The controller processes this information and automatically adjusts the panhard bar length to optimize cab orientation, creating a closed-loop system that reduces energy consumption through automated, responsive adjustment rather than manual intervention

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system uses the vehicle's existing sensors and control architecture to automatically manage cab orientation without requiring external assistance or complex manual operation. The panhard bar adjustment mechanism integrates with the vehicle's suspension system, utilizing existing mechanical components to reduce overall system complexity

Inventive Principle:

Principle #25Self-service

3Object-affected harmful factors

If the panhard bar length is continuously adjusted, then wind force resistance is optimized, but the wear and operational lifetime of components decrease

Engineering Contradiction:

Improvewind force resistanceVSAvoidcomponent operational lifetime

Core Design Contradiction:

Object-affected harmful factorsVSDuration of action of stationary object

Solution Approach 1:

Instead of continuous adjustment, the system periodically adjusts the panhard bar length based on detected wind conditions. The control system monitors wind parameters and activates adjustment only when wind force exceeds thresholds or direction changes significantly, reducing unnecessary mechanical cycling and extending component lifetime while maintaining wind resistance optimization

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system applies adjustment action only when necessary (partial action) rather than continuously. By using threshold-based control and hysteresis, the system activates panhard bar adjustment only when wind conditions warrant it, avoiding excessive mechanical operation and reducing wear on adjustment components

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20250319933A1Wind force adjustable panhard bar

Publication Date: 2025.10.16 VOLVO TRUCK CORP

AI summary

A computer system comprising processing circuitry configured to receive sensor data during propulsion of a vehicle, the sensor data comprising a first force value representing a first wind force acting on a first lateral side of a vehicle cab, and a second force value representing a second wind force acting on a second lateral side of the vehicle cab, determine a difference between the first force value and the second force value, and control an actuator to adjust a length of an adjustable panhard bar connected between the vehicle cab and a chassis of the vehicle to rotate the vehicle cab, around a geometric axis of the vehicle, in response to the determined difference between the first and second force values to reduce a wind force resistance of the vehicle cab caused by the first and second wind forces.