Electric Car Wheels with Differential Speed Control

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional automotive wheel designs do not prioritize fuel efficiency, leading to significant energy loss due to axial friction in electric vehicles, which limits their travel distance on a single charge.

Innovation Solution

Designing electric passenger cars with larger diameter wheels, differential speed control, and asymmetric weight distribution to reduce axial friction energy loss, combined with electronic traction control and hybrid driving systems, allowing for greater travel distance on a single charge.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If conventional wheel designs are used, then manufacturing simplicity is maintained, but fuel efficiency deteriorates due to significant axial friction energy loss

Engineering Contradiction:

Improveaxial friction energy lossVSAvoidwheel design complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent changes the wheel radius parameter from conventional sizes to larger than 80 cm, which fundamentally alters the friction dynamics and energy loss characteristics of the wheel-axle system

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces asymmetric wheel configurations where rear wheels have different radii than front wheels, with the back wheel radius being at least 20% greater than the front wheel radius, creating optimized friction characteristics for each wheel position

Inventive Principle:

Principle #4Asymmetry

2Duration of action of moving object

If larger diameter wheels are used, then travel distance increases for the same friction energy loss, but vehicle stability and control become more challenging

Engineering Contradiction:

Improvetravel distanceVSAvoidvehicle stability

Core Design Contradiction:

Duration of action of moving objectVSStability of the object's composition

Solution Approach 1:

The patent implements differential speed control that dynamically adjusts the rotation speeds of individual wheels based on vehicle motion state, enabling stable control despite the large wheel diameters and asymmetric configuration

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The control system continuously monitors wheel speeds and vehicle state, using feedback to adjust differential speed control parameters for maintaining stability during various operating conditions

Inventive Principle:

Principle #23Feedback

3Use of energy by moving object

If asymmetric wheel radii are used, then energy efficiency is improved, but manufacturing and assembly complexity increases

Engineering Contradiction:

Improveenergy efficiencyVSAvoidwheel assembly ease

Core Design Contradiction:

Use of energy by moving objectVSEase of manufacture

Solution Approach 1:

The patent specifies precise parameter relationships (back wheel radius at least 20% greater than front wheel radius) that optimize energy efficiency while providing clear manufacturing specifications

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS10604141B1Electrical passenger car with efficient wheels

Publication Date: 2020.03.31 OR MENT LLC

AI summary

An electrical passenger car, the electrical passenger car including: an electrically driven motor; differential speed control; and wheels, where the wheels include a first front wheel, a second front wheel, a first back wheel, and a second back wheel, where at least one of the wheels has a radius larger than 80 cm, where the differential speed control includes an ability to have a turning speed of the first front wheel greater than a turning speed of the second front wheel, and where the electrical passenger car is designed to travel for a greater distance for the same axial to wheel friction energy loss than a similar electrical passenger car having wheels of a smaller radius.