Variable Electric Transmission With Independent Wheel Torque Control

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Solution Overview

Problem

Traditional gasoline and diesel vehicles emit greenhouse gases, and there is a need for more efficient and flexible transmission systems in electric vehicles to meet the increasing demand for electric and hybrid vehicles.

Innovation Solution

A variable electric transmission system with independent wheel control and torque multiplication capabilities, utilizing gear configurations such as non-fixed planetary, eccentric, and double-eccentric gear sets, along with moment offsets supported by bearings, to achieve optimal speed and torque distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If traditional transmission systems are used in electric vehicles, then the design is simpler, but the efficiency and flexibility are insufficient

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidtransmission system complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The transmission system is divided into multiple independent gear sets (first gear system with first, second, third gears; second gear system with fourth, fifth, sixth gears). Each gear system can operate independently or in combination, allowing flexible speed control and improving transmission efficiency without requiring a completely complex integrated design

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system employs variable gear ratios through different gear combinations and configurations (including non-fixed planetary, eccentric, and double-eccentric gear sets). The gear ratios can be dynamically adjusted by engaging different gear pairs, enabling the transmission system to adapt to varying vehicle conditions and optimize efficiency across different operating ranges

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If independent wheel control is implemented, then the flexibility and performance are enhanced, but the device complexity increases

Engineering Contradiction:

Improvewheel control flexibilityVSAvoidtransmission system complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The gear systems are designed with universal applicability where the same gear mechanisms can serve multiple functions - providing different speed ratios, enabling independent wheel control, and supporting both drive and regeneration modes. This multi-functionality reduces the need for separate dedicated mechanisms for each function

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Power

If torque multiplication is achieved through moment offset, then the power delivery is improved, but the manufacturing precision requirements increase

Engineering Contradiction:

Improvetorque multiplicationVSAvoidgear configuration precision

Core Design Contradiction:

PowerVSManufacturing precision

Solution Approach 1:

The system employs asymmetric gear configurations including eccentric gear sets and double-eccentric gear sets where the gear centers are deliberately offset from each other. This asymmetric arrangement creates the moment offset necessary for torque multiplication while the offsets are built into the gear design geometry, reducing the need for high-precision alignment during assembly

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The bearings are positioned to support the moment offset forces generated by the asymmetric gear configurations. By properly locating the bearings to handle these forces, the system achieves torque multiplication without requiring extremely precise gear mesh alignment, as the bearing support compensates for the asymmetric loading

Inventive Principle:

Principle #12Equipotentiality

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 allows for efficient and flexible speed control of individual wheels, torque multiplication, and energy recovery, enhancing the performance of electric and hybrid vehicles.

Implementation Method 1

a first gear system including a first gear, a second gear, and a third gear, wherein the first gear, the second gear, and the third gear are each mechanically engaged with at least one of the other gears of the first gear system

Methodology Applied

Scientific EffectMechanical Advantage: Mechanical Advantage

Implementation Method 2

by providing a moment offset supported by one or more bearings as provided in certain implementations of a variable electric transmission system described herein, torque multiplication is achieved

Methodology Applied

Scientific EffectTorque: Torque

Data Source

PatentUS20260049648A1Variable electric transmission system and method

Publication Date: 2026.02.19 GOBLIN CORP LLC

AI summary

A system for setting a drive ratio of a transmission that includes a left gear system including a first gear coupled to a first rotary input, a second gear coupled to a second rotary input, and a third gear coupled to a left rotary output; and a right gear system including a fourth gear coupled to the first rotary input, a fifth gear coupled to a third rotary input, and a sixth gear coupled to a right rotary output. During operation, the first rotary input moves the first gear at a faster peripheral speed than the second rotary input moves the second gear for a forward operation of the left rotary output and the first rotary input moves the fourth gear at a slower peripheral speed than the third rotary input moves the fifth gear for a reverse operation of the right rotary output.